adding tools from pokeruby

88 files changed, 10976 insertions, 0 deletions

diff --git a/tools/aif2pcm/.gitignore b/tools/aif2pcm/.gitignore
new file mode 100644
index 000000000..31531797e
--- /dev/null
+++ b/tools/aif2pcm/.gitignore
@@ -0,0 +1,2 @@
+aif2pcm
+
diff --git a/tools/aif2pcm/LICENSE b/tools/aif2pcm/LICENSE
new file mode 100644
index 000000000..966b92bd6
--- /dev/null
+++ b/tools/aif2pcm/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2016 huderlem
+Copyright (c) 2005, 2006 by Marco Trillo <marcotrillo@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/aif2pcm/Makefile b/tools/aif2pcm/Makefile
new file mode 100644
index 000000000..967930c59
--- /dev/null
+++ b/tools/aif2pcm/Makefile
@@ -0,0 +1,15 @@
+CC = gcc
+
+CFLAGS = -Wall -Wextra -Wno-switch -Werror -std=c11 -O2 -s
+
+LIBS = -lm
+
+SRCS = main.c extended.c
+
+.PHONY: clean
+
+aif2pcm: $(SRCS)
+	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
+
+clean:
+	$(RM) aif2pcm aif2pcm.exe
diff --git a/tools/aif2pcm/extended.c b/tools/aif2pcm/extended.c
new file mode 100644
index 000000000..94449164b
--- /dev/null
+++ b/tools/aif2pcm/extended.c
@@ -0,0 +1,172 @@
+/*	$Id: extended.c,v 1.8 2006/12/23 11:17:49 toad32767 Exp $ */
+/*-
+ * Copyright (c) 2005, 2006 by Marco Trillo <marcotrillo@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any
+ * person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the
+ * Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice
+ * shall be included in all copies or substantial portions of
+ * the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+ * KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+ * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <math.h>
+#include <string.h>
+#include <stdint.h>
+
+/*
+ * Infinite & NAN values
+ * for non-IEEE systems
+ */
+#ifndef HUGE_VAL
+#ifdef HUGE
+#define INFINITE_VALUE	HUGE
+#define NAN_VALUE	HUGE
+#endif
+#else
+#define INFINITE_VALUE	HUGE_VAL
+#define NAN_VALUE	HUGE_VAL
+#endif
+
+/*
+ * IEEE 754 Extended Precision
+ *
+ * Implementation here is the 80-bit extended precision
+ * format of Motorola 68881, Motorola 68882 and Motorola
+ * 68040 FPUs, as well as Intel 80x87 FPUs.
+ *
+ * See:
+ *    http://www.freescale.com/files/32bit/doc/fact_sheet/BR509.pdf
+ */
+/*
+ * Exponent range: [-16383,16383]
+ * Precision for mantissa: 64 bits with no hidden bit
+ * Bias: 16383
+ */
+
+/*
+ * Write IEEE Extended Precision Numbers
+ */
+void
+ieee754_write_extended(double in, uint8_t* out)
+{
+	int sgn, exp, shift;
+	double fraction, t;
+	unsigned int lexp, hexp;
+	unsigned long low, high;
+
+	if (in == 0.0) {
+		memset(out, 0, 10);
+		return;
+	}
+	if (in < 0.0) {
+		in = fabs(in);
+		sgn = 1;
+	} else
+		sgn = 0;
+
+	fraction = frexp(in, &exp);
+
+	if (exp == 0 || exp > 16384) {
+		if (exp > 16384) /* infinite value */
+			low = high = 0;
+		else {
+			low = 0x80000000;
+			high = 0;
+		}
+		exp = 32767;
+		goto done;
+	}
+	fraction = ldexp(fraction, 32);
+	t = floor(fraction);
+	low = (unsigned long) t;
+	fraction -= t;
+	t = floor(ldexp(fraction, 32));
+	high = (unsigned long) t;
+
+	/* Convert exponents < -16382 to -16382 (then they will be
+	 * stored as -16383) */
+	if (exp < -16382) {
+		shift = 0 - exp - 16382;
+		high >>= shift;
+		high |= (low << (32 - shift));
+		low >>= shift;
+		exp = -16382;
+	}
+	exp += 16383 - 1;	/* bias */
+
+done:
+	lexp = ((unsigned int) exp) >> 8;
+	hexp = ((unsigned int) exp) & 0xFF;
+
+	/* big endian */
+	out[0] = ((uint8_t) sgn) << 7;
+	out[0] |= (uint8_t) lexp;
+	out[1] = (uint8_t) hexp;
+	out[2] = (uint8_t) (low >> 24);
+	out[3] = (uint8_t) ((low >> 16) & 0xFF);
+	out[4] = (uint8_t) ((low >> 8) & 0xFF);
+	out[5] = (uint8_t) (low & 0xFF);
+	out[6] = (uint8_t) (high >> 24);
+	out[7] = (uint8_t) ((high >> 16) & 0xFF);
+	out[8] = (uint8_t) ((high >> 8) & 0xFF);
+	out[9] = (uint8_t) (high & 0xFF);
+
+	return;
+}
+
+
+/*
+ * Read IEEE Extended Precision Numbers
+ */
+double
+ieee754_read_extended(uint8_t* in)
+{
+	int sgn, exp;
+	unsigned long low, high;
+	double out;
+
+	/* Extract the components from the big endian buffer */
+	sgn = (int) (in[0] >> 7);
+	exp = ((int) (in[0] & 0x7F) << 8) | ((int) in[1]);
+	low = (((unsigned long) in[2]) << 24)
+		| (((unsigned long) in[3]) << 16)
+		| (((unsigned long) in[4]) << 8) | (unsigned long) in[5];
+	high = (((unsigned long) in[6]) << 24)
+		| (((unsigned long) in[7]) << 16)
+		| (((unsigned long) in[8]) << 8) | (unsigned long) in[9];
+
+	if (exp == 0 && low == 0 && high == 0)
+		return (sgn ? -0.0 : 0.0);
+
+	switch (exp) {
+	case 32767:
+		if (low == 0 && high == 0)
+			return (sgn ? -INFINITE_VALUE : INFINITE_VALUE);
+		else
+			return (sgn ? -NAN_VALUE : NAN_VALUE);
+	default:
+		exp -= 16383;	/* unbias exponent */
+
+	}
+
+	out = ldexp((double) low, -31 + exp);
+	out += ldexp((double) high, -63 + exp);
+
+	return (sgn ? -out : out);
+}
diff --git a/tools/aif2pcm/main.c b/tools/aif2pcm/main.c
new file mode 100644
index 000000000..fbb024a1d
--- /dev/null
+++ b/tools/aif2pcm/main.c
@@ -0,0 +1,830 @@
+// Copyright(c) 2016 huderlem
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <limits.h>
+
+/* extended.c */
+void ieee754_write_extended (double, uint8_t*);
+double ieee754_read_extended (uint8_t*);
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)           \
+do                                         \
+{                                          \
+    fprintf(stderr, format, __VA_ARGS__);  \
+    exit(1);                               \
+} while (0)
+
+#else
+
+#define FATAL_ERROR(format, ...)            \
+do                                          \
+{                                           \
+    fprintf(stderr, format, ##__VA_ARGS__); \
+    exit(1);                                \
+} while (0)
+
+#endif // _MSC_VER
+
+typedef struct {
+	unsigned long num_samples;
+	uint8_t *samples;
+	uint8_t midi_note;
+	bool has_loop;
+	unsigned long loop_offset;
+	double sample_rate;
+	unsigned long real_num_samples;
+} AifData;
+
+struct Bytes {
+	unsigned long length;
+	uint8_t *data;
+};
+
+struct Bytes *read_bytearray(const char *filename)
+{
+	struct Bytes *bytes = malloc(sizeof(struct Bytes));
+	FILE *f = fopen(filename, "rb");
+	if (!f)
+	{
+		FATAL_ERROR("Failed to open '%s' for reading!\n", filename);
+	}
+	fseek(f, 0, SEEK_END);
+	bytes->length = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	bytes->data = malloc(bytes->length);
+	unsigned long read = fread(bytes->data, bytes->length, 1, f);
+	fclose(f);
+	if (read <= 0)
+	{
+		FATAL_ERROR("Failed to read data from '%s'!\n", filename);
+	}
+	return bytes;
+}
+
+void write_bytearray(const char *filename, struct Bytes *bytes)
+{
+	FILE *f = fopen(filename, "wb");
+	if (!f)
+	{
+		FATAL_ERROR("Failed to open '%s' for writing!\n", filename);
+	}
+	fwrite(bytes->data, bytes->length, 1, f);
+	fclose(f);
+}
+
+void free_bytearray(struct Bytes *bytes)
+{
+	free(bytes->data);
+	free(bytes);
+}
+
+char *get_file_extension(char *filename)
+{
+	char *index = strrchr(filename, '.');
+	if (!index || index == filename)
+	{
+		return NULL;
+	}
+	return index + 1;
+}
+
+char *new_file_extension(char *filename, char *ext)
+{
+	char *index = strrchr(filename, '.');
+	if (!index || index == filename)
+	{
+		index = filename + strlen(filename);
+	}
+	int length = index - filename;
+	char *new_filename = malloc(length + 1 + strlen(ext) + 1);
+	if (new_filename)
+	{
+		strcpy(new_filename, filename);
+		new_filename[length] = '.';
+		strcpy(new_filename + length + 1, ext);
+	}
+	return new_filename;
+}
+
+void read_aif(struct Bytes *aif, AifData *aif_data)
+{
+	aif_data->has_loop = false;
+	aif_data->num_samples = 0;
+
+	unsigned long pos = 0;
+	char chunk_name[5]; chunk_name[4] = '\0';
+	char chunk_type[5]; chunk_type[4] = '\0';
+
+	// Check for FORM Chunk
+	memcpy(chunk_name, &aif->data[pos], 4);
+	pos += 4;
+	if (strcmp(chunk_name, "FORM") != 0)
+	{
+		FATAL_ERROR("Input .aif file has invalid header Chunk '%s'!\n", chunk_name);
+	}
+
+	// Read size of whole file.
+	unsigned long whole_chunk_size = aif->data[pos++] << 24;
+	whole_chunk_size |= (aif->data[pos++] << 16);
+	whole_chunk_size |= (aif->data[pos++] <<  8);
+	whole_chunk_size |= (uint8_t)aif->data[pos++];
+
+	unsigned long expected_whole_chunk_size = aif->length - 8;
+	if (whole_chunk_size != expected_whole_chunk_size)
+	{
+		FATAL_ERROR("FORM Chunk ckSize '%lu' doesn't match actual size '%lu'!\n", whole_chunk_size, expected_whole_chunk_size);
+	}
+
+	// Check for AIFF Form Type
+	memcpy(chunk_type, &aif->data[pos], 4);
+	pos += 4;
+	if (strcmp(chunk_type, "AIFF") != 0)
+	{
+		FATAL_ERROR("FORM Type is '%s', but it must be AIFF!", chunk_type);
+	}
+
+	unsigned long num_sample_frames = 0;
+
+	// Read all the Chunks to populate the AifData struct.
+	while ((pos + 8) < aif->length)
+	{
+		// Read Chunk id
+		memcpy(chunk_name, &aif->data[pos], 4);
+		pos += 4;
+
+		unsigned long chunk_size = (aif->data[pos++] << 24);
+		chunk_size |= (aif->data[pos++] << 16);
+		chunk_size |= (aif->data[pos++] <<  8);
+		chunk_size |=  aif->data[pos++];
+
+		if ((pos + chunk_size) > aif->length)
+		{
+			FATAL_ERROR("%s chunk at 0x%lx reached end of file before finishing\n", chunk_name, pos);
+		}
+
+		if (strcmp(chunk_name, "COMM") == 0)
+		{
+			short num_channels = (aif->data[pos++] << 8);
+			num_channels |= (uint8_t)aif->data[pos++];
+			if (num_channels != 1)
+			{
+				FATAL_ERROR("numChannels (%d) in the COMM Chunk must be 1!\n", num_channels);
+			}
+
+			num_sample_frames =  (aif->data[pos++] << 24);
+			num_sample_frames |= (aif->data[pos++] << 16);
+			num_sample_frames |= (aif->data[pos++] <<  8);
+			num_sample_frames |=  (uint8_t)aif->data[pos++];
+
+			short sample_size = (aif->data[pos++] << 8);
+			sample_size |= (uint8_t)aif->data[pos++];
+			if (sample_size != 8)
+			{
+				FATAL_ERROR("sampleSize (%d) in the COMM Chunk must be 8!\n", sample_size);
+			}
+
+			double sample_rate = ieee754_read_extended((uint8_t*)(aif->data + pos));
+			pos += 10;
+
+			aif_data->sample_rate = sample_rate;
+
+			if (aif_data->num_samples == 0)
+			{
+				aif_data->num_samples = num_sample_frames;
+			}
+		}
+		else if (strcmp(chunk_name, "MARK") == 0)
+		{
+			unsigned short num_markers = (aif->data[pos++] << 8);
+			num_markers |= (uint8_t)aif->data[pos++];
+
+			// Read each marker and look for the "START" marker.
+			for (int i = 0; i < num_markers; i++)
+			{
+				unsigned short marker_id = (aif->data[pos++] << 8);
+				marker_id |= (uint8_t)aif->data[pos++];
+
+				unsigned long marker_position = (aif->data[pos++] << 24);
+				marker_position |= (aif->data[pos++] << 16);
+				marker_position |= (aif->data[pos++] << 8);
+				marker_position |=  (uint8_t)aif->data[pos++];
+
+				// Marker id is a pascal-style string.
+				uint8_t marker_name_size = aif->data[pos++];
+				char *marker_name = (char *)malloc((marker_name_size + 1) * sizeof(char));
+				memcpy(marker_name, &aif->data[pos], marker_name_size);
+				marker_name[marker_name_size] = '\0';
+				pos += marker_name_size;
+
+				if (strcmp(marker_name, "START") == 0)
+				{
+					aif_data->loop_offset = marker_position;
+					aif_data->has_loop = true;
+				}
+				else if (strcmp(marker_name, "END") == 0)
+				{
+					if (!aif_data->has_loop) {
+						aif_data->loop_offset = marker_position;
+						aif_data->has_loop = true;
+					}
+					aif_data->num_samples = marker_position;
+				}
+
+				free(marker_name);
+			}
+		}
+		else if (strcmp(chunk_name, "INST") == 0)
+		{
+			uint8_t midi_note = (uint8_t)aif->data[pos++];
+
+			aif_data->midi_note = midi_note;
+
+			// Skip over data we don't need.
+			pos += 19;
+		}
+		else if (strcmp(chunk_name, "SSND") == 0)
+		{
+			// SKip offset and blockSize
+			pos += 8;
+
+			unsigned long num_samples = chunk_size - 8;
+			uint8_t *sample_data = (uint8_t *)malloc(num_samples * sizeof(uint8_t));
+			memcpy(sample_data, &aif->data[pos], num_samples);
+
+			aif_data->samples = sample_data;
+			aif_data->real_num_samples = num_samples;
+			pos += chunk_size - 8;
+		}
+		else
+		{
+			// Skip over unsupported chunks.
+			pos += chunk_size;
+		}
+	}
+}
+
+// This is a table of deltas between sample values in compressed PCM data.
+const int gDeltaEncodingTable[] = {
+	0, 1, 4, 9, 16, 25, 36, 49,
+	-64, -49, -36, -25, -16, -9, -4, -1,
+};
+
+struct Bytes *delta_decompress(struct Bytes *delta, unsigned int expected_length)
+{
+	struct Bytes *pcm = malloc(sizeof(struct Bytes));
+	pcm->length = expected_length;
+	pcm->data = malloc(pcm->length + 0x40);
+
+	uint8_t hi, lo;
+	unsigned int i = 0;
+	unsigned int j = 0;
+	int k;
+	int8_t base;
+	while (i < delta->length)
+	{
+		base = (int8_t)delta->data[i++];
+		pcm->data[j++] = (uint8_t)base;
+		if (i >= delta->length)
+		{
+			break;
+		}
+		if (j >= pcm->length)
+		{
+			break;
+		}
+		lo = delta->data[i] & 0xf;
+		base += gDeltaEncodingTable[lo];
+		pcm->data[j++] = base;
+		i++;
+		if (i >= delta->length)
+		{
+			break;
+		}
+		if (j >= pcm->length)
+		{
+			break;
+		}
+		for (k = 0; k < 31; k++)
+		{
+			hi = (delta->data[i] >> 4) & 0xf;
+			base += gDeltaEncodingTable[hi];
+			pcm->data[j++] = base;
+			if (j >= pcm->length)
+			{
+				break;
+			}
+			lo = delta->data[i] & 0xf;
+			base += gDeltaEncodingTable[lo];
+			pcm->data[j++] = base;
+			i++;
+			if (i >= delta->length)
+			{
+				break;
+			}
+			if (j >= pcm->length)
+			{
+				break;
+			}
+		}
+		if (j >= pcm->length)
+		{
+			break;
+		}
+	}
+
+	pcm->length = j;
+	return pcm;
+}
+
+int get_delta_index(uint8_t sample, uint8_t prev_sample)
+{
+	int best_error = INT_MAX;
+	int best_index = -1;
+
+	for (int i = 0; i < 16; i++)
+	{
+		uint8_t new_sample = prev_sample + gDeltaEncodingTable[i];
+		int error = sample > new_sample ? sample - new_sample : new_sample - sample;
+
+		if (error < best_error)
+		{
+			best_error = error;
+			best_index = i;
+		}
+	}
+
+	return best_index;
+}
+
+struct Bytes *delta_compress(struct Bytes *pcm)
+{
+	struct Bytes *delta = malloc(sizeof(struct Bytes));
+	// estimate the length so we can malloc
+	int num_blocks = pcm->length / 64;
+	delta->length = num_blocks * 33;
+
+	int extra = pcm->length % 64;
+	if (extra)
+	{
+		delta->length += 1;
+		extra -= 1;
+	}
+	if (extra)
+	{
+		delta->length += 1;
+		extra -= 1;
+	}
+	if (extra)
+	{
+		delta->length += (extra + 1) / 2;
+	}
+
+	delta->data = malloc(delta->length + 33);
+
+	unsigned int i = 0;
+	unsigned int j = 0;
+	int k;
+	uint8_t base;
+	int delta_index;
+
+	while (i < pcm->length)
+	{
+		base = pcm->data[i++];
+		delta->data[j++] = base;
+
+		if (i >= pcm->length)
+		{
+			break;
+		}
+		delta_index = get_delta_index(pcm->data[i++], base);
+		base += gDeltaEncodingTable[delta_index];
+		delta->data[j++] = delta_index;
+
+		for (k = 0; k < 31; k++)
+		{
+			if (i >= pcm->length)
+			{
+				break;
+			}
+			delta_index = get_delta_index(pcm->data[i++], base);
+			base += gDeltaEncodingTable[delta_index];
+			delta->data[j] = (delta_index << 4);
+
+			if (i >= pcm->length)
+			{
+				break;
+			}
+			delta_index = get_delta_index(pcm->data[i++], base);
+			base += gDeltaEncodingTable[delta_index];
+			delta->data[j++] |= delta_index;
+		}
+	}
+
+	delta->length = j;
+
+	return delta;
+}
+
+#define STORE_U32_LE(dest, value) \
+do { \
+	*(dest) = (value) & 0xff; \
+	*((dest) + 1) = ((value) >> 8) & 0xff; \
+	*((dest) + 2) = ((value) >> 16) & 0xff; \
+	*((dest) + 3) = ((value) >> 24) & 0xff; \
+} while (0)
+
+#define LOAD_U32_LE(var, src) \
+do { \
+	(var) = *(src); \
+	(var) |= (*((src) + 1) << 8); \
+	(var) |= (*((src) + 2) << 16); \
+	(var) |= (*((src) + 3) << 24); \
+} while (0)
+
+// Reads an .aif file and produces a .pcm file containing an array of 8-bit samples.
+void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress)
+{
+	struct Bytes *aif = read_bytearray(aif_filename);
+	AifData aif_data = {0};
+	read_aif(aif, &aif_data);
+
+	int header_size = 0x10;
+	struct Bytes *pcm;
+	struct Bytes output = {0};
+
+	if (compress)
+	{
+		struct Bytes *input = malloc(sizeof(struct Bytes));
+		input->data = aif_data.samples;
+		input->length = aif_data.real_num_samples;
+		pcm = delta_compress(input);
+		free(input);
+	}
+	else
+	{
+		pcm = malloc(sizeof(struct Bytes));
+		pcm->data = aif_data.samples;
+		pcm->length = aif_data.real_num_samples;
+	}
+	output.length = header_size + pcm->length;
+	output.data = malloc(output.length);
+
+	uint32_t pitch_adjust = (uint32_t)(aif_data.sample_rate * 1024);
+	uint32_t loop_offset = (uint32_t)(aif_data.loop_offset);
+	uint32_t adjusted_num_samples = (uint32_t)(aif_data.num_samples - 1);
+	uint32_t flags = 0;
+	if (aif_data.has_loop) flags |= 0x40000000;
+	if (compress) flags |= 1;
+	STORE_U32_LE(output.data + 0, flags);
+	STORE_U32_LE(output.data + 4, pitch_adjust);
+	STORE_U32_LE(output.data + 8, loop_offset);
+	STORE_U32_LE(output.data + 12, adjusted_num_samples);
+	memcpy(&output.data[header_size], pcm->data, pcm->length);
+	write_bytearray(pcm_filename, &output);
+
+	free(aif->data);
+	free(aif);
+	free(pcm);
+	free(output.data);
+	free(aif_data.samples);
+}
+
+// Reads a .pcm file containing an array of 8-bit samples and produces an .aif file.
+// See http://www-mmsp.ece.mcgill.ca/documents/audioformats/aiff/Docs/AIFF-1.3.pdf for .aif file specification.
+void pcm2aif(const char *pcm_filename, const char *aif_filename, uint32_t base_note)
+{
+	struct Bytes *pcm = read_bytearray(pcm_filename);
+
+	AifData *aif_data = malloc(sizeof(AifData));
+
+	uint32_t flags;
+	LOAD_U32_LE(flags, pcm->data + 0);
+	aif_data->has_loop = flags & 0x40000000;
+	bool compressed = flags & 1;
+
+	uint32_t pitch_adjust;
+	LOAD_U32_LE(pitch_adjust, pcm->data + 4);
+	aif_data->sample_rate = pitch_adjust / 1024.0;
+
+	LOAD_U32_LE(aif_data->loop_offset, pcm->data + 8);
+	LOAD_U32_LE(aif_data->num_samples, pcm->data + 12);
+	aif_data->num_samples += 1;
+
+	if (compressed)
+	{
+		struct Bytes *delta = pcm;
+		uint8_t *pcm_data = pcm->data;
+		delta->length -= 0x10;
+		delta->data += 0x10;
+		pcm = delta_decompress(delta, aif_data->num_samples);
+		free(pcm_data);
+		free(delta);
+	}
+	else
+	{
+		pcm->length -= 0x10;
+		pcm->data += 0x10;
+	}
+
+	aif_data->samples = malloc(pcm->length);
+	memcpy(aif_data->samples, pcm->data, pcm->length);
+
+	struct Bytes *aif = malloc(sizeof(struct Bytes));
+	aif->length = 54 + 60 + pcm->length;
+	aif->data = malloc(aif->length);
+
+	long pos = 0;
+
+	// First, write the FORM header chunk.
+	// FORM Chunk ckID
+	aif->data[pos++] = 'F';
+	aif->data[pos++] = 'O';
+	aif->data[pos++] = 'R';
+	aif->data[pos++] = 'M';
+
+	// FORM Chunk ckSize
+	unsigned long form_size = pos;
+	unsigned long data_size = aif->length - 8;
+	aif->data[pos++] = ((data_size >> 24) & 0xFF);
+	aif->data[pos++] = ((data_size >> 16) & 0xFF);
+	aif->data[pos++] = ((data_size >>  8) & 0xFF);
+	aif->data[pos++] = (data_size & 0xFF);
+
+	// FORM Chunk formType
+	aif->data[pos++] = 'A';
+	aif->data[pos++] = 'I';
+	aif->data[pos++] = 'F';
+	aif->data[pos++] = 'F';
+
+	// Next, write the Common Chunk
+	// Common Chunk ckID
+	aif->data[pos++] = 'C';
+	aif->data[pos++] = 'O';
+	aif->data[pos++] = 'M';
+	aif->data[pos++] = 'M';
+
+	// Common Chunk ckSize
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 18;
+
+	// Common Chunk numChannels
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 1;  // 1 channel
+
+	// Common Chunk numSampleFrames
+	aif->data[pos++] = ((aif_data->num_samples >> 24) & 0xFF);
+	aif->data[pos++] = ((aif_data->num_samples >> 16) & 0xFF);
+	aif->data[pos++] = ((aif_data->num_samples >> 8)  & 0xFF);
+	aif->data[pos++] = (aif_data->num_samples & 0xFF);
+
+	// Common Chunk sampleSize
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 8;  // 8 bits per sample
+
+	// Common Chunk sampleRate
+	//double sample_rate = pitch_adjust / 1024.0;
+	uint8_t sample_rate_buffer[10];
+	ieee754_write_extended(aif_data->sample_rate, sample_rate_buffer);
+	for (int i = 0; i < 10; i++)
+	{
+		aif->data[pos++] = sample_rate_buffer[i];
+	}
+
+	if (aif_data->has_loop)
+	{
+
+		// Marker Chunk ckID
+		aif->data[pos++] = 'M';
+		aif->data[pos++] = 'A';
+		aif->data[pos++] = 'R';
+		aif->data[pos++] = 'K';
+
+		// Marker Chunk ckSize
+		aif->data[pos++] = 0;
+		aif->data[pos++] = 0;
+		aif->data[pos++] = 0;
+		aif->data[pos++] = 12 + (aif_data->has_loop ? 12 : 0);
+
+		// Marker Chunk numMarkers
+		aif->data[pos++] = 0;
+		aif->data[pos++] = (aif_data->has_loop ? 2 : 1);
+
+		// Marker loop start
+		aif->data[pos++] = 0;
+		aif->data[pos++] = 1;  // id = 1
+
+		long loop_start = aif_data->loop_offset;
+		aif->data[pos++] = ((loop_start >> 24) & 0xFF);
+		aif->data[pos++] = ((loop_start >> 16) & 0xFF);
+		aif->data[pos++] = ((loop_start >> 8)  & 0xFF);
+		aif->data[pos++] = (loop_start & 0xFF);  // position
+
+		aif->data[pos++] = 5;  // pascal-style string length
+		aif->data[pos++] = 'S';
+		aif->data[pos++] = 'T';
+		aif->data[pos++] = 'A';
+		aif->data[pos++] = 'R';
+		aif->data[pos++] = 'T';  // markerName
+
+		// Marker loop end
+		aif->data[pos++] = 0;
+		aif->data[pos++] = (aif_data->has_loop ? 2 : 1);  // id = 2
+
+		long loop_end = aif_data->num_samples;
+		aif->data[pos++] = ((loop_end >> 24) & 0xFF);
+		aif->data[pos++] = ((loop_end >> 16) & 0xFF);
+		aif->data[pos++] = ((loop_end >> 8)  & 0xFF);
+		aif->data[pos++] = (loop_end & 0xFF);  // position
+
+		aif->data[pos++] = 3;  // pascal-style string length
+		aif->data[pos++] = 'E';
+		aif->data[pos++] = 'N';
+		aif->data[pos++] = 'D';
+	}
+
+	// Instrument Chunk ckID
+	aif->data[pos++] = 'I';
+	aif->data[pos++] = 'N';
+	aif->data[pos++] = 'S';
+	aif->data[pos++] = 'T';
+
+	// Instrument Chunk ckSize
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 20;
+
+	aif->data[pos++] = base_note;  // baseNote
+	aif->data[pos++] = 0;          // detune
+	aif->data[pos++] = 0;          // lowNote
+	aif->data[pos++] = 127;        // highNote
+	aif->data[pos++] = 1;          // lowVelocity
+	aif->data[pos++] = 127;        // highVelocity
+	aif->data[pos++] = 0;          // gain (hi)
+	aif->data[pos++] = 0;          // gain (lo)
+
+	// Instrument Chunk sustainLoop
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 1; // playMode = ForwardLooping
+
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 1;  // beginLoop marker id
+
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 2;  // endLoop marker id
+
+		// Instrument Chunk releaseLoop
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 1; // playMode = ForwardLooping
+
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 1;  // beginLoop marker id
+
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 2;  // endLoop marker id
+
+	// Finally, write the Sound Data Chunk
+	// Sound Data Chunk ckID
+	aif->data[pos++] = 'S';
+	aif->data[pos++] = 'S';
+	aif->data[pos++] = 'N';
+	aif->data[pos++] = 'D';
+
+	// Sound Data Chunk ckSize
+	unsigned long sound_data_size = pcm->length + 8;
+	aif->data[pos++] = ((sound_data_size >> 24) & 0xFF);
+	aif->data[pos++] = ((sound_data_size >> 16) & 0xFF);
+	aif->data[pos++] = ((sound_data_size >> 8)  & 0xFF);
+	aif->data[pos++] = (sound_data_size & 0xFF);
+
+	// Sound Data Chunk offset
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+
+	// Sound Data Chunk blockSize
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+	aif->data[pos++] = 0;
+
+	// Sound Data Chunk soundData
+	for (unsigned int i = 0; i < aif_data->loop_offset; i++)
+	{
+		aif->data[pos++] = aif_data->samples[i];
+	}
+
+	int j = 0;
+	for (unsigned int i = aif_data->loop_offset; i < pcm->length; i++)
+	{
+		int pcm_index = aif_data->loop_offset + (j++ % (pcm->length - aif_data->loop_offset));
+		aif->data[pos++] = aif_data->samples[pcm_index];
+	}
+
+	aif->length = pos;
+
+	// Go back and rewrite ckSize
+	data_size = aif->length - 8;
+	aif->data[form_size + 0] = ((data_size >> 24) & 0xFF);
+	aif->data[form_size + 1] = ((data_size >> 16) & 0xFF);
+	aif->data[form_size + 2] = ((data_size >>  8) & 0xFF);
+	aif->data[form_size + 3] = (data_size & 0xFF);
+
+	write_bytearray(aif_filename, aif);
+
+	free(aif->data);
+	free(aif);
+}
+
+void usage(void)
+{
+	fprintf(stderr, "Usage: aif2pcm bin_file [aif_file]\n");
+	fprintf(stderr, "       aif2pcm aif_file [bin_file] [--compress]\n");
+}
+
+int main(int argc, char **argv)
+{
+	if (argc < 2)
+	{
+		usage();
+		exit(1);
+	}
+
+	char *input_file = argv[1];
+	char *extension = get_file_extension(input_file);
+	char *output_file;
+	bool compressed = false;
+
+	if (argc > 3)
+	{
+		for (int i = 3; i < argc; i++)
+		{
+			if (strcmp(argv[i], "--compress") == 0)
+			{
+				compressed = true;
+			}
+		}
+	}
+
+	if (strcmp(extension, "aif") == 0 || strcmp(extension, "aiff") == 0)
+	{
+		if (argc >= 3)
+		{
+			output_file = argv[2];
+			aif2pcm(input_file, output_file, compressed);
+		}
+		else
+		{
+			output_file = new_file_extension(input_file, "bin");
+			aif2pcm(input_file, output_file, compressed);
+			free(output_file);
+		}
+	}
+	else if (strcmp(extension, "bin") == 0)
+	{
+		if (argc >= 3)
+		{
+			output_file = argv[2];
+			pcm2aif(input_file, output_file, 60);
+		}
+		else
+		{
+			output_file = new_file_extension(input_file, "aif");
+			pcm2aif(input_file, output_file, 60);
+			free(output_file);
+		}
+	}
+	else
+	{
+		FATAL_ERROR("Input file must be .aif or .bin: '%s'\n", input_file);
+	}
+
+	return 0;
+}
diff --git a/tools/bin2c/.gitignore b/tools/bin2c/.gitignore
new file mode 100644
index 000000000..366f3d3e9
--- /dev/null
+++ b/tools/bin2c/.gitignore
@@ -0,0 +1 @@
+bin2c
diff --git a/tools/bin2c/LICENSE b/tools/bin2c/LICENSE
new file mode 100644
index 000000000..534d15349
--- /dev/null
+++ b/tools/bin2c/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/bin2c/Makefile b/tools/bin2c/Makefile
new file mode 100644
index 000000000..4cc23a25a
--- /dev/null
+++ b/tools/bin2c/Makefile
@@ -0,0 +1,13 @@
+CC = gcc
+
+CFLAGS = -Wall -Wextra -Werror -std=c11 -O2 -s
+
+.PHONY: clean
+
+SRCS = bin2c.c
+
+bin2c: $(SRCS)
+	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) bin2c bin2c.exe
diff --git a/tools/bin2c/bin2c.c b/tools/bin2c/bin2c.c
new file mode 100644
index 000000000..b4bd437f0
--- /dev/null
+++ b/tools/bin2c/bin2c.c
@@ -0,0 +1,201 @@
+// Copyright(c) 2015-2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)          \
+do                                        \
+{                                         \
+    fprintf(stderr, format, __VA_ARGS__); \
+    exit(1);                              \
+} while (0)
+
+#else
+
+#define FATAL_ERROR(format, ...)            \
+do                                          \
+{                                           \
+    fprintf(stderr, format, ##__VA_ARGS__); \
+    exit(1);                                \
+} while (0)
+
+#endif // _MSC_VER
+
+unsigned char *ReadWholeFile(char *path, int *size)
+{
+    FILE *fp = fopen(path, "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+    fseek(fp, 0, SEEK_END);
+
+    *size = ftell(fp);
+
+    unsigned char *buffer = malloc(*size);
+
+    if (buffer == NULL)
+        FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
+
+    rewind(fp);
+
+    if (fread(buffer, *size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", path);
+
+    fclose(fp);
+
+    return buffer;
+}
+
+int ExtractData(unsigned char *buffer, int offset, int size)
+{
+    switch (size)
+    {
+    case 1:
+        return buffer[offset];
+    case 2:
+        return (buffer[offset + 1] << 8)
+             | buffer[offset];
+    case 4:
+        return (buffer[offset + 3] << 24)
+             | (buffer[offset + 2] << 16)
+             | (buffer[offset + 1] << 8)
+             | buffer[offset];
+    default:
+        FATAL_ERROR("Invalid size passed to ExtractData.\n");
+    }
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 3)
+        FATAL_ERROR("Usage: bin2c INPUT_FILE VAR_NAME [OPTIONS...]\n");
+
+    int fileSize;
+    unsigned char *buffer = ReadWholeFile(argv[1], &fileSize);
+    char *var_name = argv[2];
+    int col = 1;
+    int pad = 0;
+    int size = 1;
+    bool isSigned = false;
+    bool isStatic = false;
+    bool isDecimal = false;
+
+    for (int i = 3; i < argc; i++)
+    {
+        if (!strcmp(argv[i], "-col"))
+        {
+            i++;
+
+            if (i >= argc)
+                FATAL_ERROR("Missing argument after '-col'.\n");
+
+            col = atoi(argv[i]);
+        }
+        else if (!strcmp(argv[i], "-pad"))
+        {
+            i++;
+
+            if (i >= argc)
+                FATAL_ERROR("Missing argument after '-pad'.\n");
+
+            pad = atoi(argv[i]);
+        }
+        else if (!strcmp(argv[i], "-size"))
+        {
+            i++;
+
+            if (i >= argc)
+                FATAL_ERROR("Missing argument after '-size'.\n");
+
+            size = atoi(argv[i]);
+
+            if (size != 1 && size != 2 && size != 4)
+                FATAL_ERROR("Size must be 1, 2, or 4.\n");
+        }
+        else if (!strcmp(argv[i], "-signed"))
+        {
+            isSigned = true;
+            isDecimal = true;
+        }
+        else if (!strcmp(argv[i], "-static"))
+        {
+            isStatic = true;
+        }
+        else if (!strcmp(argv[i], "-decimal"))
+        {
+            isDecimal = true;
+        }
+        else
+        {
+            FATAL_ERROR("Unrecognized option '%s'.\n", argv[i]);
+        }
+    }
+
+    if ((fileSize & (size - 1)) != 0)
+        FATAL_ERROR("Size %d doesn't evenly divide file size %d.\n", size, fileSize);
+
+    printf("// Generated file. Do not edit.\n\n");
+
+    if (isStatic)
+        printf("static ");
+
+    printf("const ");
+
+    if (isSigned)
+        printf("s%d ", 8 * size);
+    else
+        printf("u%d ", 8 * size);
+
+    printf("%s[] =\n{", var_name);
+
+    int count = fileSize / size;
+    int offset = 0;
+
+    for (int i = 0; i < count; i++)
+    {
+        if (i % col == 0)
+            printf("\n    ");
+
+        int data = ExtractData(buffer, offset, size);
+        offset += size;
+
+        if (isDecimal)
+        {
+            if (isSigned)
+                printf("%*d, ", pad, data);
+            else
+                printf("%*uu, ", pad, data);
+        }
+        else
+        {
+            printf("%#*xu, ", pad, data);
+        }
+    }
+
+    printf("\n};\n");
+
+    return 0;
+}
diff --git a/tools/gbagfx/.gitignore b/tools/gbagfx/.gitignore
new file mode 100644
index 000000000..dbbb3f04c
--- /dev/null
+++ b/tools/gbagfx/.gitignore
@@ -0,0 +1 @@
+gbagfx
diff --git a/tools/gbagfx/LICENSE b/tools/gbagfx/LICENSE
new file mode 100644
index 000000000..b66bf81c0
--- /dev/null
+++ b/tools/gbagfx/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/gbagfx/Makefile b/tools/gbagfx/Makefile
new file mode 100644
index 000000000..d791dabb5
--- /dev/null
+++ b/tools/gbagfx/Makefile
@@ -0,0 +1,15 @@
+CC = gcc
+
+CFLAGS = -Wall -Wextra -Werror -std=c11 -O2 -s -DPNG_SKIP_SETJMP_CHECK
+
+LIBS = -lpng -lz
+
+SRCS = main.c convert_png.c gfx.c jasc_pal.c lz.c rl.c util.c font.c
+
+.PHONY: clean
+
+gbagfx: $(SRCS) convert_png.h gfx.h global.h jasc_pal.h lz.h rl.h util.h font.h
+	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
+
+clean:
+	$(RM) gbagfx gbagfx.exe
diff --git a/tools/gbagfx/convert_png.c b/tools/gbagfx/convert_png.c
new file mode 100644
index 000000000..37904318c
--- /dev/null
+++ b/tools/gbagfx/convert_png.c
@@ -0,0 +1,212 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <png.h>
+#include "global.h"
+#include "convert_png.h"
+#include "gfx.h"
+
+static FILE *PngReadOpen(char *path, png_structp *pngStruct, png_infop *pngInfo)
+{
+    FILE *fp = fopen(path, "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+    unsigned char sig[8];
+
+    if (fread(sig, 8, 1, fp) != 1)
+        FATAL_ERROR("Failed to read PNG signature from \"%s\".\n", path);
+
+    if (png_sig_cmp(sig, 0, 8))
+        FATAL_ERROR("\"%s\" does not have a valid PNG signature.\n", path);
+
+    png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+    if (!png_ptr)
+        FATAL_ERROR("Failed to create PNG read struct.\n");
+
+    png_infop info_ptr = png_create_info_struct(png_ptr);
+
+    if (!info_ptr)
+        FATAL_ERROR("Failed to create PNG info struct.\n");
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Failed to init I/O for reading \"%s\".\n", path);
+
+    png_init_io(png_ptr, fp);
+    png_set_sig_bytes(png_ptr, 8);
+    png_read_info(png_ptr, info_ptr);
+
+    *pngStruct = png_ptr;
+    *pngInfo = info_ptr;
+
+    return fp;
+}
+
+void ReadPng(char *path, struct Image *image)
+{
+    png_structp png_ptr;
+    png_infop info_ptr;
+
+    FILE *fp = PngReadOpen(path, &png_ptr, &info_ptr);
+
+    int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
+
+    if (bit_depth != image->bitDepth)
+        FATAL_ERROR("\"%s\" has a bit depth of %d, but the expected bit depth is %d.\n", path, bit_depth, image->bitDepth);
+
+    int color_type = png_get_color_type(png_ptr, info_ptr);
+
+    if (color_type != PNG_COLOR_TYPE_GRAY && color_type != PNG_COLOR_TYPE_PALETTE)
+        FATAL_ERROR("\"%s\" has an unsupported color type.\n", path);
+
+    // Check if the image has a palette so that we can tell if the colors need to be inverted later.
+    // Don't read the palette because it's not needed for now.
+    image->hasPalette = (color_type == PNG_COLOR_TYPE_PALETTE);
+
+    image->width = png_get_image_width(png_ptr, info_ptr);
+    image->height = png_get_image_height(png_ptr, info_ptr);
+
+    int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+    image->pixels = malloc(image->height * rowbytes);
+
+    if (image->pixels == NULL)
+        FATAL_ERROR("Failed to allocate pixel buffer.\n");
+
+    png_bytepp row_pointers = malloc(image->height * sizeof(png_bytep));
+
+    if (row_pointers == NULL)
+        FATAL_ERROR("Failed to allocate row pointers.\n");
+
+    for (int i = 0; i < image->height; i++)
+        row_pointers[i] = (png_bytep)(image->pixels + (i * rowbytes));
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Error reading from \"%s\".\n", path);
+
+    png_read_image(png_ptr, row_pointers);
+
+    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+    free(row_pointers);
+    fclose(fp);
+}
+
+void ReadPngPalette(char *path, struct Palette *palette)
+{
+    png_structp png_ptr;
+    png_infop info_ptr;
+    png_colorp colors;
+    int numColors;
+
+    FILE *fp = PngReadOpen(path, &png_ptr, &info_ptr);
+
+    if (png_get_color_type(png_ptr, info_ptr) != PNG_COLOR_TYPE_PALETTE)
+        FATAL_ERROR("The image \"%s\" does not contain a palette.\n", path);
+
+    if (png_get_PLTE(png_ptr, info_ptr, &colors, &numColors) != PNG_INFO_PLTE)
+        FATAL_ERROR("Failed to retrieve palette from \"%s\".\n", path);
+
+    if (numColors > 256)
+        FATAL_ERROR("Images with more than 256 colors are not supported.\n");
+
+    palette->numColors = numColors;
+    for (int i = 0; i < numColors; i++) {
+        palette->colors[i].red = colors[i].red;
+        palette->colors[i].green = colors[i].green;
+        palette->colors[i].blue = colors[i].blue;
+    }
+
+    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+    fclose(fp);
+}
+
+void SetPngPalette(png_structp png_ptr, png_infop info_ptr, struct Palette *palette)
+{
+    png_colorp colors = malloc(palette->numColors * sizeof(png_color));
+
+    if (colors == NULL)
+        FATAL_ERROR("Failed to allocate PNG palette.\n");
+
+    for (int i = 0; i < palette->numColors; i++) {
+        colors[i].red = palette->colors[i].red;
+        colors[i].green = palette->colors[i].green;
+        colors[i].blue = palette->colors[i].blue;
+    }
+
+    png_set_PLTE(png_ptr, info_ptr, colors, palette->numColors);
+
+    free(colors);
+}
+
+void WritePng(char *path, struct Image *image)
+{
+    FILE *fp = fopen(path, "wb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
+
+    png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+    if (!png_ptr)
+        FATAL_ERROR("Failed to create PNG write struct.\n");
+
+    png_infop info_ptr = png_create_info_struct(png_ptr);
+
+    if (!info_ptr)
+        FATAL_ERROR("Failed to create PNG info struct.\n");
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Failed to init I/O for writing \"%s\".\n", path);
+
+    png_init_io(png_ptr, fp);
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Error writing header for \"%s\".\n", path);
+
+    int color_type = image->hasPalette ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_GRAY;
+
+    png_set_IHDR(png_ptr, info_ptr, image->width, image->height,
+        image->bitDepth, color_type, PNG_INTERLACE_NONE,
+        PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+
+    if (image->hasPalette) {
+        SetPngPalette(png_ptr, info_ptr, &image->palette);
+
+        if (image->hasTransparency) {
+            png_byte trans = 0;
+            png_set_tRNS(png_ptr, info_ptr, &trans, 1, 0);
+        }
+    }
+
+    png_write_info(png_ptr, info_ptr);
+
+    png_bytepp row_pointers = malloc(image->height * sizeof(png_bytep));
+
+    if (row_pointers == NULL)
+        FATAL_ERROR("Failed to allocate row pointers.\n");
+
+    int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+    for (int i = 0; i < image->height; i++)
+        row_pointers[i] = (png_bytep)(image->pixels + (i * rowbytes));
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Error writing \"%s\".\n", path);
+
+    png_write_image(png_ptr, row_pointers);
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        FATAL_ERROR("Error ending write of \"%s\".\n", path);
+
+    png_write_end(png_ptr, NULL);
+
+    fclose(fp);
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+    free(row_pointers);
+}
diff --git a/tools/gbagfx/convert_png.h b/tools/gbagfx/convert_png.h
new file mode 100644
index 000000000..caf081b73
--- /dev/null
+++ b/tools/gbagfx/convert_png.h
@@ -0,0 +1,12 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef CONVERT_PNG_H
+#define CONVERT_PNG_H
+
+#include "gfx.h"
+
+void ReadPng(char *path, struct Image *image);
+void WritePng(char *path, struct Image *image);
+void ReadPngPalette(char *path, struct Palette *palette);
+
+#endif // CONVERT_PNG_H
diff --git a/tools/gbagfx/font.c b/tools/gbagfx/font.c
new file mode 100644
index 000000000..0dd6fbc3e
--- /dev/null
+++ b/tools/gbagfx/font.c
@@ -0,0 +1,326 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "global.h"
+#include "font.h"
+#include "gfx.h"
+#include "util.h"
+
+unsigned char gFontPalette[][3] = {
+	{0x90, 0xC8, 0xFF}, // bg (saturated blue that contrasts well with the shadow color)
+	{0x38, 0x38, 0x38}, // fg (dark grey)
+	{0xD8, 0xD8, 0xD8}, // shadow (light grey)
+	{0xFF, 0xFF, 0xFF}  // box (white)
+};
+
+static void ConvertFromLatinFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	unsigned int srcPixelsOffset = 0;
+
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			for (unsigned int glyphTile = 0; glyphTile < 4; glyphTile++) {
+				unsigned int pixelsX = (column * 16) + ((glyphTile & 1) * 8);
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + ((glyphTile >> 1) * 8) + i;				
+					unsigned int destPixelsOffset = (pixelsY * 64) + (pixelsX / 4);
+
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					srcPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void ConvertToLatinFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	unsigned int destPixelsOffset = 0;
+
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			for (unsigned int glyphTile = 0; glyphTile < 4; glyphTile++) {
+				unsigned int pixelsX = (column * 16) + ((glyphTile & 1) * 8);
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + ((glyphTile >> 1) * 8) + i;
+					unsigned int srcPixelsOffset = (pixelsY * 64) + (pixelsX / 4);
+
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					destPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void ConvertFromHalfwidthJapaneseFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			unsigned int glyphIndex = (row * 16) + column;
+
+			for (unsigned int glyphTile = 0; glyphTile < 2; glyphTile++) {
+				unsigned int pixelsX = column * 8;
+				unsigned int srcPixelsOffset = 512 * (glyphIndex >> 4) + 16 * (glyphIndex & 0xF) + 256 * glyphTile;
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + (glyphTile * 8) + i;
+					unsigned int destPixelsOffset = (pixelsY * 32) + (pixelsX / 4);
+					
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					srcPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void ConvertToHalfwidthJapaneseFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			unsigned int glyphIndex = (row * 16) + column;
+
+			for (unsigned int glyphTile = 0; glyphTile < 2; glyphTile++) {
+				unsigned int pixelsX = column * 8;
+				unsigned int destPixelsOffset = 512 * (glyphIndex >> 4) + 16 * (glyphIndex & 0xF) + 256 * glyphTile;
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + (glyphTile * 8) + i;
+					unsigned int srcPixelsOffset = (pixelsY * 32) + (pixelsX / 4);
+
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					destPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void ConvertFromFullwidthJapaneseFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			unsigned int glyphIndex = (row * 16) + column;
+
+			for (unsigned int glyphTile = 0; glyphTile < 4; glyphTile++) {
+				unsigned int pixelsX = (column * 16) + ((glyphTile & 1) * 8);
+				unsigned int srcPixelsOffset = 512 * (glyphIndex >> 3) + 32 * (glyphIndex & 7) + 256 * (glyphTile >> 1) + 16 * (glyphTile & 1);
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + ((glyphTile >> 1) * 8) + i;
+					unsigned int destPixelsOffset = (pixelsY * 64) + (pixelsX / 4);
+
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					srcPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void ConvertToFullwidthJapaneseFont(unsigned char *src, unsigned char *dest, unsigned int numRows)
+{
+	for (unsigned int row = 0; row < numRows; row++) {
+		for (unsigned int column = 0; column < 16; column++) {
+			unsigned int glyphIndex = (row * 16) + column;
+
+			for (unsigned int glyphTile = 0; glyphTile < 4; glyphTile++) {
+				unsigned int pixelsX = (column * 16) + ((glyphTile & 1) * 8);
+				unsigned int destPixelsOffset = 512 * (glyphIndex >> 3) + 32 * (glyphIndex & 7) + 256 * (glyphTile >> 1) + 16 * (glyphTile & 1);
+
+				for (unsigned int i = 0; i < 8; i++) {
+					unsigned int pixelsY = (row * 16) + ((glyphTile >> 1) * 8) + i;
+					unsigned int srcPixelsOffset = (pixelsY * 64) + (pixelsX / 4);
+
+					dest[destPixelsOffset] = src[srcPixelsOffset + 1];
+					dest[destPixelsOffset + 1] = src[srcPixelsOffset];
+
+					destPixelsOffset += 2;
+				}
+			}
+		}
+	}
+}
+
+static void SetFontPalette(struct Image *image)
+{
+	image->hasPalette = true;
+
+	image->palette.numColors = 4;
+
+	for (int i = 0; i < image->palette.numColors; i++) {
+		image->palette.colors[i].red = gFontPalette[i][0];
+		image->palette.colors[i].green = gFontPalette[i][1];
+		image->palette.colors[i].blue = gFontPalette[i][2];
+	}
+
+	image->hasTransparency = false;
+}
+
+void ReadLatinFont(char *path, struct Image *image)
+{
+	int fileSize;
+	unsigned char *buffer = ReadWholeFile(path, &fileSize);
+
+	int numGlyphs = fileSize / 64;
+
+	if (numGlyphs % 16 != 0)
+		FATAL_ERROR("The number of glyphs (%d) is not a multiple of 16.\n", numGlyphs);
+
+	int numRows = numGlyphs / 16;
+
+	image->width = 256;
+	image->height = numRows * 16;
+	image->bitDepth = 2;
+	image->pixels = malloc(fileSize);
+
+	if (image->pixels == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertFromLatinFont(buffer, image->pixels, numRows);
+
+	free(buffer);
+
+	SetFontPalette(image);
+}
+
+void WriteLatinFont(char *path, struct Image *image)
+{
+	if (image->width != 256)
+		FATAL_ERROR("The width of the font image (%d) is not 256.\n", image->width);
+
+	if (image->height % 16 != 0)
+		FATAL_ERROR("The height of the font image (%d) is not a multiple of 16.\n", image->height);
+
+	int numRows = image->height / 16;
+	int bufferSize = numRows * 16 * 64;
+	unsigned char *buffer = malloc(bufferSize);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertToLatinFont(image->pixels, buffer, numRows);
+
+	WriteWholeFile(path, buffer, bufferSize);
+
+	free(buffer);
+}
+
+void ReadHalfwidthJapaneseFont(char *path, struct Image *image)
+{
+	int fileSize;
+	unsigned char *buffer = ReadWholeFile(path, &fileSize);
+
+	int glyphSize = 32;
+
+	if (fileSize % glyphSize != 0)
+		FATAL_ERROR("The file size (%d) is not a multiple of %d.\n", fileSize, glyphSize);
+
+	int numGlyphs = fileSize / glyphSize;
+	
+	if (numGlyphs % 16 != 0)
+		FATAL_ERROR("The number of glyphs (%d) is not a multiple of 16.\n", numGlyphs);
+
+	int numRows = numGlyphs / 16;
+
+	image->width = 128;
+	image->height = numRows * 16;
+	image->bitDepth = 2;
+	image->pixels = malloc(fileSize);
+
+	if (image->pixels == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertFromHalfwidthJapaneseFont(buffer, image->pixels, numRows);
+
+	free(buffer);
+
+	SetFontPalette(image);
+}
+
+void WriteHalfwidthJapaneseFont(char *path, struct Image *image)
+{
+	if (image->width != 128)
+		FATAL_ERROR("The width of the font image (%d) is not 128.\n", image->width);
+
+	if (image->height % 16 != 0)
+		FATAL_ERROR("The height of the font image (%d) is not a multiple of 16.\n", image->height);
+
+	int numRows = image->height / 16;
+	int bufferSize = numRows * 16 * 32;
+	unsigned char *buffer = malloc(bufferSize);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertToHalfwidthJapaneseFont(image->pixels, buffer, numRows);
+
+	WriteWholeFile(path, buffer, bufferSize);
+
+	free(buffer);
+}
+
+void ReadFullwidthJapaneseFont(char *path, struct Image *image)
+{
+	int fileSize;
+	unsigned char *buffer = ReadWholeFile(path, &fileSize);
+
+	int numGlyphs = fileSize / 64;
+
+	if (numGlyphs % 16 != 0)
+		FATAL_ERROR("The number of glyphs (%d) is not a multiple of 16.\n", numGlyphs);
+
+	int numRows = numGlyphs / 16;
+
+	image->width = 256;
+	image->height = numRows * 16;
+	image->bitDepth = 2;
+	image->pixels = malloc(fileSize);
+
+	if (image->pixels == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertFromFullwidthJapaneseFont(buffer, image->pixels, numRows);
+
+	free(buffer);
+
+	SetFontPalette(image);
+}
+
+void WriteFullwidthJapaneseFont(char *path, struct Image *image)
+{
+	if (image->width != 256)
+		FATAL_ERROR("The width of the font image (%d) is not 256.\n", image->width);
+
+	if (image->height % 16 != 0)
+		FATAL_ERROR("The height of the font image (%d) is not a multiple of 16.\n", image->height);
+
+	int numRows = image->height / 16;
+	int bufferSize = numRows * 16 * 64;
+	unsigned char *buffer = malloc(bufferSize);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for font.\n");
+
+	ConvertToFullwidthJapaneseFont(image->pixels, buffer, numRows);
+
+	WriteWholeFile(path, buffer, bufferSize);
+
+	free(buffer);
+}
diff --git a/tools/gbagfx/font.h b/tools/gbagfx/font.h
new file mode 100644
index 000000000..45086d02a
--- /dev/null
+++ b/tools/gbagfx/font.h
@@ -0,0 +1,16 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef FONT_H
+#define FONT_H
+
+#include <stdbool.h>
+#include "gfx.h"
+
+void ReadLatinFont(char *path, struct Image *image);
+void WriteLatinFont(char *path, struct Image *image);
+void ReadHalfwidthJapaneseFont(char *path, struct Image *image);
+void WriteHalfwidthJapaneseFont(char *path, struct Image *image);
+void ReadFullwidthJapaneseFont(char *path, struct Image *image);
+void WriteFullwidthJapaneseFont(char *path, struct Image *image);
+
+#endif // FONT_H
diff --git a/tools/gbagfx/gfx.c b/tools/gbagfx/gfx.c
new file mode 100644
index 000000000..c0f7f492c
--- /dev/null
+++ b/tools/gbagfx/gfx.c
@@ -0,0 +1,329 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "global.h"
+#include "gfx.h"
+#include "util.h"
+
+#define GET_GBA_PAL_RED(x)   (((x) >>  0) & 0x1F)
+#define GET_GBA_PAL_GREEN(x) (((x) >>  5) & 0x1F)
+#define GET_GBA_PAL_BLUE(x)  (((x) >> 10) & 0x1F)
+
+#define SET_GBA_PAL(r, g, b) (((b) << 10) | ((g) << 5) | (r))
+
+#define UPCONVERT_BIT_DEPTH(x) (((x) * 255) / 31)
+
+#define DOWNCONVERT_BIT_DEPTH(x) ((x) / 8)
+
+static void ConvertFromTiles1Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int destY = tilesY * 8 + j;
+			int destX = tilesX;
+			unsigned char srcPixelOctet = *src++;
+			unsigned char *destPixelOctet = &dest[destY * pitch + destX];
+
+			for (int k = 0; k < 8; k++) {
+				*destPixelOctet <<= 1;
+				*destPixelOctet |= (srcPixelOctet & 1) ^ invertColors;
+				srcPixelOctet >>= 1;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+static void ConvertFromTiles4Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth * 4;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int destY = tilesY * 8 + j;
+
+			for (int k = 0; k < 4; k++) {
+				int destX = tilesX * 4 + k;
+				unsigned char srcPixelPair = *src++;
+				unsigned char leftPixel = srcPixelPair & 0xF;
+				unsigned char rightPixel = srcPixelPair >> 4;
+
+				if (invertColors) {
+					leftPixel = 15 - leftPixel;
+					rightPixel = 15 - rightPixel;
+				}
+
+				dest[destY * pitch + destX] = (leftPixel << 4) | rightPixel;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+static void ConvertFromTiles8Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth * 8;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int destY = tilesY * 8 + j;
+
+			for (int k = 0; k < 8; k++) {
+				int destX = tilesX * 8 + k;
+				unsigned char srcPixel = *src++;
+
+				if (invertColors)
+					srcPixel = 255 - srcPixel;
+
+				dest[destY * pitch + destX] = srcPixel;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+static void ConvertToTiles1Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int srcY = tilesY * 8 + j;
+			int srcX = tilesX;
+			unsigned char srcPixelOctet = src[srcY * pitch + srcX];
+			unsigned char *destPixelOctet = dest++;
+
+			for (int k = 0; k < 8; k++) {
+				*destPixelOctet <<= 1;
+				*destPixelOctet |= (srcPixelOctet & 1) ^ invertColors;
+				srcPixelOctet >>= 1;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+static void ConvertToTiles4Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth * 4;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int srcY = tilesY * 8 + j;
+
+			for (int k = 0; k < 4; k++) {
+				int srcX = tilesX * 4 + k;
+				unsigned char srcPixelPair = src[srcY * pitch + srcX];
+				unsigned char leftPixel = srcPixelPair >> 4;
+				unsigned char rightPixel = srcPixelPair & 0xF;
+
+				if (invertColors) {
+					leftPixel = 15 - leftPixel;
+					rightPixel = 15 - rightPixel;
+				}
+
+				*dest++ = (rightPixel << 4) | leftPixel;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+static void ConvertToTiles8Bpp(unsigned char *src, unsigned char *dest, int numTiles, int tilesWidth, bool invertColors)
+{
+	int tilesX = 0;
+	int tilesY = 0;
+	int pitch = tilesWidth * 8;
+
+	for (int i = 0; i < numTiles; i++) {
+		for (int j = 0; j < 8; j++) {
+			int srcY = tilesY * 8 + j;
+
+			for (int k = 0; k < 8; k++) {
+				int srcX = tilesX * 8 + k;
+				unsigned char srcPixel = src[srcY * pitch + srcX];
+
+				if (invertColors)
+					srcPixel = 255 - srcPixel;
+
+				*dest++ = srcPixel;
+			}
+		}
+
+		tilesX++;
+
+		if (tilesX == tilesWidth) {
+			tilesX = 0;
+			tilesY++;
+		}
+	}
+}
+
+void ReadImage(char *path, int tilesWidth, int bitDepth, struct Image *image, bool invertColors)
+{
+	int tileSize = bitDepth * 8;
+
+	int fileSize;
+	unsigned char *buffer = ReadWholeFile(path, &fileSize);
+
+	int numTiles = fileSize / tileSize;
+
+	int tilesHeight = (numTiles + tilesWidth - 1) / tilesWidth;
+
+	image->width = tilesWidth * 8;
+	image->height = tilesHeight * 8;
+	image->bitDepth = bitDepth;
+	image->pixels = calloc(tilesWidth * tilesHeight, tileSize);
+
+	if (image->pixels == NULL)
+		FATAL_ERROR("Failed to allocate memory for pixels.\n");
+
+	switch (bitDepth) {
+	case 1:
+		ConvertFromTiles1Bpp(buffer, image->pixels, numTiles, tilesWidth, invertColors);
+		break;
+	case 4:
+		ConvertFromTiles4Bpp(buffer, image->pixels, numTiles, tilesWidth, invertColors);
+		break;
+	case 8:
+		ConvertFromTiles8Bpp(buffer, image->pixels, numTiles, tilesWidth, invertColors);
+		break;
+	}
+
+	free(buffer);
+}
+
+void WriteImage(char *path, int numTiles, int bitDepth, struct Image *image, bool invertColors)
+{
+	int tileSize = bitDepth * 8;
+
+	if (image->width % 8 != 0)
+		FATAL_ERROR("The width in pixels (%d) isn't a multiple of 8.\n", image->width);
+
+	if (image->height % 8 != 0)
+		FATAL_ERROR("The height in pixels (%d) isn't a multiple of 8.\n", image->height);
+
+	int tilesWidth = image->width / 8;
+	int tilesHeight = image->height / 8;
+
+	int maxNumTiles = tilesWidth * tilesHeight;
+
+	if (numTiles == 0)
+		numTiles = maxNumTiles;
+	else if (numTiles > maxNumTiles)
+		FATAL_ERROR("The specified number of tiles (%d) is greater than the maximum possible value (%d).\n", numTiles, maxNumTiles);
+
+	int bufferSize = numTiles * tileSize;
+	unsigned char *buffer = malloc(bufferSize);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for pixels.\n");
+
+	switch (bitDepth) {
+	case 1:
+		ConvertToTiles1Bpp(image->pixels, buffer, numTiles, tilesWidth, invertColors);
+		break;
+	case 4:
+		ConvertToTiles4Bpp(image->pixels, buffer, numTiles, tilesWidth, invertColors);
+		break;
+	case 8:
+		ConvertToTiles8Bpp(image->pixels, buffer, numTiles, tilesWidth, invertColors);
+		break;
+	}
+
+	WriteWholeFile(path, buffer, bufferSize);
+
+	free(buffer);
+}
+
+void FreeImage(struct Image *image)
+{
+	free(image->pixels);
+	image->pixels = NULL;
+}
+
+void ReadGbaPalette(char *path, struct Palette *palette)
+{
+	int fileSize;
+	unsigned char *data = ReadWholeFile(path, &fileSize);
+
+	if (fileSize % 2 != 0)
+		FATAL_ERROR("The file size (%d) is not a multiple of 2.\n", fileSize);
+
+	palette->numColors = fileSize / 2;
+
+	for (int i = 0; i < palette->numColors; i++) {
+		uint16_t paletteEntry = (data[i * 2 + 1] << 8) | data[i * 2];
+		palette->colors[i].red = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_RED(paletteEntry));
+		palette->colors[i].green = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_GREEN(paletteEntry));
+		palette->colors[i].blue = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_BLUE(paletteEntry));
+	}
+
+	free(data);
+}
+
+void WriteGbaPalette(char *path, struct Palette *palette)
+{
+	FILE *fp = fopen(path, "wb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
+
+	for (int i = 0; i < palette->numColors; i++) {
+		unsigned char red = DOWNCONVERT_BIT_DEPTH(palette->colors[i].red);
+		unsigned char green = DOWNCONVERT_BIT_DEPTH(palette->colors[i].green);
+		unsigned char blue = DOWNCONVERT_BIT_DEPTH(palette->colors[i].blue);
+
+		uint16_t paletteEntry = SET_GBA_PAL(red, green, blue);
+
+		fputc(paletteEntry & 0xFF, fp);
+		fputc(paletteEntry >> 8, fp);
+	}
+
+	fclose(fp);
+}
diff --git a/tools/gbagfx/gfx.h b/tools/gbagfx/gfx.h
new file mode 100644
index 000000000..ecd436652
--- /dev/null
+++ b/tools/gbagfx/gfx.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef GFX_H
+#define GFX_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct Color {
+	unsigned char red;
+	unsigned char green;
+	unsigned char blue;
+};
+
+struct Palette {
+	struct Color colors[256];
+	int numColors;
+};
+
+struct Image {
+	int width;
+	int height;
+	int bitDepth;
+	unsigned char *pixels;
+	bool hasPalette;
+	struct Palette palette;
+	bool hasTransparency;
+};
+
+void ReadImage(char *path, int tilesWidth, int bitDepth, struct Image *image, bool invertColors);
+void WriteImage(char *path, int numTiles, int bitDepth, struct Image *image, bool invertColors);
+void FreeImage(struct Image *image);
+void ReadGbaPalette(char *path, struct Palette *palette);
+void WriteGbaPalette(char *path, struct Palette *palette);
+
+#endif // GFX_H
diff --git a/tools/gbagfx/global.h b/tools/gbagfx/global.h
new file mode 100644
index 000000000..65dd351d2
--- /dev/null
+++ b/tools/gbagfx/global.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef GLOBAL_H
+#define GLOBAL_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)          \
+do {                                      \
+    fprintf(stderr, format, __VA_ARGS__); \
+    exit(1);                              \
+} while (0)
+
+#define UNUSED
+
+#else
+
+#define FATAL_ERROR(format, ...)            \
+do {                                        \
+    fprintf(stderr, format, ##__VA_ARGS__); \
+    exit(1);                                \
+} while (0)
+
+#define UNUSED __attribute__((__unused__))
+
+#endif // _MSC_VER
+
+#endif // GLOBAL_H
diff --git a/tools/gbagfx/jasc_pal.c b/tools/gbagfx/jasc_pal.c
new file mode 100644
index 000000000..e5ba9c3c2
--- /dev/null
+++ b/tools/gbagfx/jasc_pal.c
@@ -0,0 +1,172 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <string.h>
+#include "global.h"
+#include "gfx.h"
+#include "util.h"
+
+// Read/write Paint Shop Pro palette files.
+
+// Format of a Paint Shop Pro palette file, line by line:
+// "JASC-PAL\r\n" (signature)
+// "0100\r\n" (version; seems to always be "0100")
+// "<NUMBER_OF_COLORS>\r\n" (number of colors in decimal)
+//
+// <NUMBER_OF_COLORS> times:
+// "<RED> <GREEN> <BLUE>\r\n" (color entry)
+//
+// Each color component is a decimal number from 0 to 255.
+// Examples:
+// Black - "0 0 0\r\n"
+// Blue  - "0 0 255\r\n"
+// Brown - "150 75 0\r\n"
+
+#define MAX_LINE_LENGTH 11
+
+void ReadJascPaletteLine(FILE *fp, char *line)
+{
+    int c;
+    int length = 0;
+
+    for (;;)
+    {
+        c = fgetc(fp);
+
+        if (c == '\r')
+        {
+            c = fgetc(fp);
+
+            if (c != '\n')
+                FATAL_ERROR("CR line endings aren't supported.\n");
+
+            line[length] = 0;
+
+            return;
+        }
+
+        if (c == '\n')
+            FATAL_ERROR("LF line endings aren't supported.\n");
+
+        if (c == EOF)
+            FATAL_ERROR("Unexpected EOF. No CRLF at end of file.\n");
+
+        if (c == 0)
+            FATAL_ERROR("NUL character in file.\n");
+
+        if (length == MAX_LINE_LENGTH)
+        {
+            line[length] = 0;
+            FATAL_ERROR("The line \"%s\" is too long.\n", line);
+        }
+
+        line[length++] = c;
+    }
+}
+
+void ReadJascPalette(char *path, struct Palette *palette)
+{
+    char line[MAX_LINE_LENGTH + 1];
+
+    FILE *fp = fopen(path, "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open JASC-PAL file \"%s\" for reading.\n", path);
+
+    ReadJascPaletteLine(fp, line);
+
+    if (strcmp(line, "JASC-PAL") != 0)
+        FATAL_ERROR("Invalid JASC-PAL signature.\n");
+
+    ReadJascPaletteLine(fp, line);
+
+    if (strcmp(line, "0100") != 0)
+        FATAL_ERROR("Unsuported JASC-PAL version.\n");
+
+    ReadJascPaletteLine(fp, line);
+
+    if (!ParseNumber(line, NULL, 10, &palette->numColors))
+        FATAL_ERROR("Failed to parse number of colors.\n");
+
+    if (palette->numColors < 1 || palette->numColors > 256)
+        FATAL_ERROR("%d is an invalid number of colors. The number of colors must be in the range [1, 256].\n", palette->numColors);
+
+    for (int i = 0; i < palette->numColors; i++)
+    {
+        ReadJascPaletteLine(fp, line);
+
+        char *s = line;
+        char *end;
+
+        int red;
+        int green;
+        int blue;
+
+        if (!ParseNumber(s, &end, 10, &red))
+            FATAL_ERROR("Failed to parse red color component.\n");
+
+        s = end;
+
+        if (*s != ' ')
+            FATAL_ERROR("Expected a space after red color component.\n");
+
+        s++;
+
+        if (*s < '0' || *s > '9')
+            FATAL_ERROR("Expected only a space between red and green color components.\n");
+
+        if (!ParseNumber(s, &end, 10, &green))
+            FATAL_ERROR("Failed to parse green color component.\n");
+
+        s = end;
+
+        if (*s != ' ')
+            FATAL_ERROR("Expected a space after green color component.\n");
+
+        s++;
+
+        if (*s < '0' || *s > '9')
+            FATAL_ERROR("Expected only a space between green and blue color components.\n");
+
+        if (!ParseNumber(s, &end, 10, &blue))
+            FATAL_ERROR("Failed to parse blue color component.\n");
+
+        if (*end != 0)
+            FATAL_ERROR("Garbage after blue color component.\n");
+
+        if (red < 0 || red > 255)
+            FATAL_ERROR("Red color component (%d) is outside the range [0, 255].\n", red);
+
+        if (green < 0 || green > 255)
+            FATAL_ERROR("Green color component (%d) is outside the range [0, 255].\n", green);
+
+        if (blue < 0 || blue > 255)
+            FATAL_ERROR("Blue color component (%d) is outside the range [0, 255].\n", blue);
+
+        palette->colors[i].red = red;
+        palette->colors[i].green = green;
+        palette->colors[i].blue = blue;
+    }
+
+    if (fgetc(fp) != EOF)
+        FATAL_ERROR("Garbage after color data.\n");
+
+    fclose(fp);
+}
+
+void WriteJascPalette(char *path, struct Palette *palette)
+{
+    FILE *fp = fopen(path, "wb");
+
+    fputs("JASC-PAL\r\n", fp);
+    fputs("0100\r\n", fp);
+    fprintf(fp, "%d\r\n", palette->numColors);
+
+    for (int i = 0; i < palette->numColors; i++)
+    {
+        struct Color *color = &palette->colors[i];
+        fprintf(fp, "%d %d %d\r\n", color->red, color->green, color->blue);
+    }
+
+    fclose(fp);
+}
diff --git a/tools/gbagfx/jasc_pal.h b/tools/gbagfx/jasc_pal.h
new file mode 100644
index 000000000..b60b31fc8
--- /dev/null
+++ b/tools/gbagfx/jasc_pal.h
@@ -0,0 +1,9 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef JASC_PAL_H
+#define JASC_PAL_H
+
+void ReadJascPalette(char *path, struct Palette *palette);
+void WriteJascPalette(char *path, struct Palette *palette);
+
+#endif // JASC_PAL_H
diff --git a/tools/gbagfx/lz.c b/tools/gbagfx/lz.c
new file mode 100644
index 000000000..c2ba3e327
--- /dev/null
+++ b/tools/gbagfx/lz.c
@@ -0,0 +1,155 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include "global.h"
+#include "lz.h"
+
+unsigned char *LZDecompress(unsigned char *src, int srcSize, int *uncompressedSize)
+{
+	if (srcSize < 4)
+		goto fail;
+
+	int destSize = (src[3] << 16) | (src[2] << 8) | src[1];
+
+	unsigned char *dest = malloc(destSize);
+
+	if (dest == NULL)
+		goto fail;
+
+	int srcPos = 4;
+	int destPos = 0;
+
+	for (;;) {
+		if (srcPos >= srcSize)
+			goto fail;
+
+		unsigned char flags = src[srcPos++];
+
+		for (int i = 0; i < 8; i++) {
+			if (flags & 0x80) {
+				if (srcPos + 1 >= srcSize)
+					goto fail;
+
+				int blockSize = (src[srcPos] >> 4) + 3;
+				int blockDistance = (((src[srcPos] & 0xF) << 8) | src[srcPos + 1]) + 1;
+
+				srcPos += 2;
+
+				int blockPos = destPos - blockDistance;
+
+				// Some Ruby/Sapphire tilesets overflow.
+				if (destPos + blockSize > destSize) {
+					blockSize = destSize - destPos;
+					fprintf(stderr, "Destination buffer overflow.\n");
+				}
+
+				if (blockPos < 0)
+					goto fail;
+
+				for (int j = 0; j < blockSize; j++)
+					dest[destPos++] = dest[blockPos + j];
+			} else {
+				if (srcPos >= srcSize || destPos >= destSize)
+					goto fail;
+
+				dest[destPos++] = src[srcPos++];
+			}
+
+			if (destPos == destSize) {
+				*uncompressedSize = destSize;
+				return dest;
+			}
+
+			flags <<= 1;
+		}
+	}
+
+fail:
+	FATAL_ERROR("Fatal error while decompressing LZ file.\n");
+}
+
+unsigned char *LZCompress(unsigned char *src, int srcSize, int *compressedSize)
+{
+	const int minDistance = 2; // for compatibility with LZ77UnCompVram()
+
+	if (srcSize <= 0)
+		goto fail;
+
+	int worstCaseDestSize = 4 + srcSize + ((srcSize + 7) / 8);
+
+	// Round up to the next multiple of four.
+	worstCaseDestSize = (worstCaseDestSize + 3) & ~3;
+
+	unsigned char *dest = malloc(worstCaseDestSize);
+
+	if (dest == NULL)
+		goto fail;
+
+	// header
+	dest[0] = 0x10; // LZ compression type
+	dest[1] = (unsigned char)srcSize;
+	dest[2] = (unsigned char)(srcSize >> 8);
+	dest[3] = (unsigned char)(srcSize >> 16);
+
+	int srcPos = 0;
+	int destPos = 4;
+
+	for (;;) {
+		unsigned char *flags = &dest[destPos++];
+		*flags = 0;
+
+		for (int i = 0; i < 8; i++) {
+			int bestBlockDistance = 0;
+			int bestBlockSize = 0;
+			int blockDistance = minDistance;
+
+			while (blockDistance <= srcPos && blockDistance <= 0x1000) {
+				int blockStart = srcPos - blockDistance;
+				int blockSize = 0;
+
+				while (blockSize < 18
+				    && srcPos + blockSize < srcSize
+				    && src[blockStart + blockSize] == src[srcPos + blockSize])
+					blockSize++;
+
+				if (blockSize > bestBlockSize) {
+					bestBlockDistance = blockDistance;
+					bestBlockSize = blockSize;
+
+					if (blockSize == 18)
+						break;
+				}
+
+				blockDistance++;
+			}
+
+			if (bestBlockSize >= 3) {
+				*flags |= (0x80 >> i);
+				srcPos += bestBlockSize;
+				bestBlockSize -= 3;
+				bestBlockDistance--;
+				dest[destPos++] = (bestBlockSize << 4) | ((unsigned int)bestBlockDistance >> 8);
+				dest[destPos++] = (unsigned char)bestBlockDistance;
+			} else {
+				dest[destPos++] = src[srcPos++];
+			}
+
+			if (srcPos == srcSize) {
+				// Pad to multiple of 4 bytes.
+				int remainder = destPos % 4;
+
+				if (remainder != 0) {
+					for (int i = 0; i < 4 - remainder; i++)
+						dest[destPos++] = 0;
+				}
+
+				*compressedSize = destPos;
+				return dest;
+			}
+		}
+	}
+
+fail:
+	FATAL_ERROR("Fatal error while compressing LZ file.\n");
+}
diff --git a/tools/gbagfx/lz.h b/tools/gbagfx/lz.h
new file mode 100644
index 000000000..164d62279
--- /dev/null
+++ b/tools/gbagfx/lz.h
@@ -0,0 +1,9 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef LZ_H
+#define LZ_H
+
+unsigned char *LZDecompress(unsigned char *src, int srcSize, int *uncompressedSize);
+unsigned char *LZCompress(unsigned char *src, int srcSize, int *compressedSize);
+
+#endif // LZ_H
diff --git a/tools/gbagfx/main.c b/tools/gbagfx/main.c
new file mode 100644
index 000000000..97db60e84
--- /dev/null
+++ b/tools/gbagfx/main.c
@@ -0,0 +1,402 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include "global.h"
+#include "util.h"
+#include "gfx.h"
+#include "convert_png.h"
+#include "jasc_pal.h"
+#include "lz.h"
+#include "rl.h"
+#include "font.h"
+
+struct CommandHandler
+{
+    const char *inputFileExtension;
+    const char *outputFileExtension;
+    void(*function)(char *inputPath, char *outputPath, int argc, char **argv);
+};
+
+void ConvertGbaToPng(char *inputPath, char *outputPath, int width, int bitDepth, char *paletteFilePath, bool hasTransparency)
+{
+    struct Image image;
+
+    if (paletteFilePath != NULL)
+    {
+        ReadGbaPalette(paletteFilePath, &image.palette);
+        image.hasPalette = true;
+    }
+    else
+    {
+        image.hasPalette = false;
+    }
+
+    ReadImage(inputPath, width, bitDepth, &image, !image.hasPalette);
+
+    image.hasTransparency = hasTransparency;
+
+    WritePng(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void ConvertPngToGba(char *inputPath, char *outputPath, int numTiles, int bitDepth)
+{
+    struct Image image;
+
+    image.bitDepth = bitDepth;
+
+    ReadPng(inputPath, &image);
+
+    WriteImage(outputPath, numTiles, bitDepth, &image, !image.hasPalette);
+
+    FreeImage(&image);
+}
+
+void HandleGbaToPngCommand(char *inputPath, char *outputPath, int argc, char **argv)
+{
+    char *inputFileExtension = GetFileExtension(inputPath);
+    int bitDepth = inputFileExtension[0] - '0';
+    char *paletteFilePath = NULL;
+    bool hasTransparency = false;
+    int width = 1;
+
+    for (int i = 3; i < argc; i++)
+    {
+        char *option = argv[i];
+
+        if (strcmp(option, "-palette") == 0)
+        {
+            if (i + 1 >= argc)
+                FATAL_ERROR("No palette file path following \"-palette\".\n");
+
+            i++;
+
+            paletteFilePath = argv[i];
+        }
+        else if (strcmp(option, "-object") == 0)
+        {
+            hasTransparency = true;
+        }
+        else if (strcmp(option, "-width") == 0)
+        {
+            if (i + 1 >= argc)
+                FATAL_ERROR("No width following \"-width\".\n");
+
+            i++;
+
+            if (!ParseNumber(argv[i], NULL, 10, &width))
+                FATAL_ERROR("Failed to parse width.\n");
+
+            if (width < 1)
+                FATAL_ERROR("Width must be positive.\n");
+        }
+        else
+        {
+            FATAL_ERROR("Unrecognized option \"%s\".\n", option);
+        }
+    }
+
+    ConvertGbaToPng(inputPath, outputPath, width, bitDepth, paletteFilePath, hasTransparency);
+}
+
+void HandlePngToGbaCommand(char *inputPath, char *outputPath, int argc, char **argv)
+{
+    char *outputFileExtension = GetFileExtension(outputPath);
+    int bitDepth = outputFileExtension[0] - '0';
+    int numTiles = 0;
+
+    for (int i = 3; i < argc; i++)
+    {
+        char *option = argv[i];
+
+        if (strcmp(option, "-num_tiles") == 0)
+        {
+            if (i + 1 >= argc)
+                FATAL_ERROR("No number of tiles following \"-num_tiles\".\n");
+
+            i++;
+
+            if (!ParseNumber(argv[i], NULL, 10, &numTiles))
+                FATAL_ERROR("Failed to parse number of tiles.\n");
+
+            if (numTiles < 1)
+                FATAL_ERROR("Number of tiles must be positive.\n");
+        }
+        else
+        {
+            FATAL_ERROR("Unrecognized option \"%s\".\n", option);
+        }
+    }
+
+    ConvertPngToGba(inputPath, outputPath, numTiles, bitDepth);
+}
+
+void HandlePngToGbaPaletteCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Palette palette;
+
+    ReadPngPalette(inputPath, &palette);
+    WriteGbaPalette(outputPath, &palette);
+}
+
+void HandleGbaToJascPaletteCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Palette palette;
+
+    ReadGbaPalette(inputPath, &palette);
+    WriteJascPalette(outputPath, &palette);
+}
+
+void HandleJascToGbaPaletteCommand(char *inputPath, char *outputPath, int argc, char **argv)
+{
+    int numColors = 0;
+
+    for (int i = 3; i < argc; i++)
+    {
+        char *option = argv[i];
+
+        if (strcmp(option, "-num_colors") == 0)
+        {
+            if (i + 1 >= argc)
+                FATAL_ERROR("No number of colors following \"-num_colors\".\n");
+
+            i++;
+
+            if (!ParseNumber(argv[i], NULL, 10, &numColors))
+                FATAL_ERROR("Failed to parse number of colors.\n");
+
+            if (numColors < 1)
+                FATAL_ERROR("Number of colors must be positive.\n");
+        }
+        else
+        {
+            FATAL_ERROR("Unrecognized option \"%s\".\n", option);
+        }
+    }
+
+    struct Palette palette;
+
+    ReadJascPalette(inputPath, &palette);
+
+    if (numColors != 0)
+        palette.numColors = numColors;
+
+    WriteGbaPalette(outputPath, &palette);
+}
+
+void HandleLatinFontToPngCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    ReadLatinFont(inputPath, &image);
+    WritePng(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandlePngToLatinFontCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    image.bitDepth = 2;
+
+    ReadPng(inputPath, &image);
+    WriteLatinFont(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandleHalfwidthJapaneseFontToPngCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    ReadHalfwidthJapaneseFont(inputPath, &image);
+    WritePng(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandlePngToHalfwidthJapaneseFontCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    image.bitDepth = 2;
+
+    ReadPng(inputPath, &image);
+    WriteHalfwidthJapaneseFont(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandleFullwidthJapaneseFontToPngCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    ReadFullwidthJapaneseFont(inputPath, &image);
+    WritePng(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandlePngToFullwidthJapaneseFontCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    struct Image image;
+
+    image.bitDepth = 2;
+
+    ReadPng(inputPath, &image);
+    WriteFullwidthJapaneseFont(outputPath, &image);
+
+    FreeImage(&image);
+}
+
+void HandleLZCompressCommand(char *inputPath, char *outputPath, int argc, char **argv)
+{
+    int overflowSize = 0;
+
+    for (int i = 3; i < argc; i++)
+    {
+        char *option = argv[i];
+
+        if (strcmp(option, "-overflow") == 0)
+        {
+            if (i + 1 >= argc)
+                FATAL_ERROR("No size following \"-overflow\".\n");
+
+            i++;
+
+            if (!ParseNumber(argv[i], NULL, 10, &overflowSize))
+                FATAL_ERROR("Failed to parse overflow size.\n");
+
+            if (overflowSize < 1)
+                FATAL_ERROR("Overflow size must be positive.\n");
+        }
+        else
+        {
+            FATAL_ERROR("Unrecognized option \"%s\".\n", option);
+        }
+    }
+
+    // The overflow option allows a quirk in some of Ruby/Sapphire's tilesets
+    // to be reproduced. It works by appending a number of zeros to the data
+    // before compressing it and then amending the LZ header's size field to
+    // reflect the expected size. This will cause an overflow when decompressing
+    // the data.
+
+    int fileSize;
+    unsigned char *buffer = ReadWholeFileZeroPadded(inputPath, &fileSize, overflowSize);
+
+    int compressedSize;
+    unsigned char *compressedData = LZCompress(buffer, fileSize + overflowSize, &compressedSize);
+
+    compressedData[1] = (unsigned char)fileSize;
+    compressedData[2] = (unsigned char)(fileSize >> 8);
+    compressedData[3] = (unsigned char)(fileSize >> 16);
+
+    free(buffer);
+
+    WriteWholeFile(outputPath, compressedData, compressedSize);
+
+    free(compressedData);
+}
+
+void HandleLZDecompressCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    int fileSize;
+    unsigned char *buffer = ReadWholeFile(inputPath, &fileSize);
+
+    int uncompressedSize;
+    unsigned char *uncompressedData = LZDecompress(buffer, fileSize, &uncompressedSize);
+
+    free(buffer);
+
+    WriteWholeFile(outputPath, uncompressedData, uncompressedSize);
+
+    free(uncompressedData);
+}
+
+void HandleRLCompressCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    int fileSize;
+    unsigned char *buffer = ReadWholeFile(inputPath, &fileSize);
+
+    int compressedSize;
+    unsigned char *compressedData = RLCompress(buffer, fileSize, &compressedSize);
+
+    free(buffer);
+
+    WriteWholeFile(outputPath, compressedData, compressedSize);
+
+    free(compressedData);
+}
+
+void HandleRLDecompressCommand(char *inputPath, char *outputPath, int argc UNUSED, char **argv UNUSED)
+{
+    int fileSize;
+    unsigned char *buffer = ReadWholeFile(inputPath, &fileSize);
+
+    int uncompressedSize;
+    unsigned char *uncompressedData = RLDecompress(buffer, fileSize, &uncompressedSize);
+
+    free(buffer);
+
+    WriteWholeFile(outputPath, uncompressedData, uncompressedSize);
+
+    free(uncompressedData);
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 3)
+        FATAL_ERROR("Usage: gbagfx INPUT_PATH OUTPUT_PATH [options...]\n");
+
+    struct CommandHandler handlers[] =
+    {
+        { "1bpp", "png", HandleGbaToPngCommand },
+        { "4bpp", "png", HandleGbaToPngCommand },
+        { "8bpp", "png", HandleGbaToPngCommand },
+        { "png", "1bpp", HandlePngToGbaCommand },
+        { "png", "4bpp", HandlePngToGbaCommand },
+        { "png", "8bpp", HandlePngToGbaCommand },
+        { "png", "gbapal", HandlePngToGbaPaletteCommand },
+        { "gbapal", "pal", HandleGbaToJascPaletteCommand },
+        { "pal", "gbapal", HandleJascToGbaPaletteCommand },
+        { "latfont", "png", HandleLatinFontToPngCommand },
+        { "png", "latfont", HandlePngToLatinFontCommand },
+        { "hwjpnfont", "png", HandleHalfwidthJapaneseFontToPngCommand },
+        { "png", "hwjpnfont", HandlePngToHalfwidthJapaneseFontCommand },
+        { "fwjpnfont", "png", HandleFullwidthJapaneseFontToPngCommand },
+        { "png", "fwjpnfont", HandlePngToFullwidthJapaneseFontCommand },
+        { NULL, "lz", HandleLZCompressCommand },
+        { "lz", NULL, HandleLZDecompressCommand },
+        { NULL, "rl", HandleRLCompressCommand },
+        { "rl", NULL, HandleRLDecompressCommand },
+        { NULL, NULL, NULL }
+    };
+
+    char *inputPath = argv[1];
+    char *outputPath = argv[2];
+    char *inputFileExtension = GetFileExtension(inputPath);
+    char *outputFileExtension = GetFileExtension(outputPath);
+
+    if (inputFileExtension == NULL)
+        FATAL_ERROR("Input file \"%s\" has no extension.\n", inputPath);
+
+    if (outputFileExtension == NULL)
+        FATAL_ERROR("Output file \"%s\" has no extension.\n", outputPath);
+
+    for (int i = 0; handlers[i].function != NULL; i++)
+    {
+        if ((handlers[i].inputFileExtension == NULL || strcmp(handlers[i].inputFileExtension, inputFileExtension) == 0)
+            && (handlers[i].outputFileExtension == NULL || strcmp(handlers[i].outputFileExtension, outputFileExtension) == 0))
+        {
+            handlers[i].function(inputPath, outputPath, argc, argv);
+            return 0;
+        }
+    }
+
+    FATAL_ERROR("Don't know how to convert \"%s\" to \"%s\".\n", inputPath, outputPath);
+}
diff --git a/tools/gbagfx/rl.c b/tools/gbagfx/rl.c
new file mode 100644
index 000000000..968c9347e
--- /dev/null
+++ b/tools/gbagfx/rl.c
@@ -0,0 +1,149 @@
+// Copyright (c) 2016 YamaArashi
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include "global.h"
+#include "rl.h"
+
+unsigned char *RLDecompress(unsigned char *src, int srcSize, int *uncompressedSize)
+{
+    if (srcSize < 4)
+        goto fail;
+
+    int destSize = (src[3] << 16) | (src[2] << 8) | src[1];
+
+    unsigned char *dest = malloc(destSize);
+
+    if (dest == NULL)
+        goto fail;
+
+    int srcPos = 4;
+    int destPos = 0;
+
+    for (;;)
+    {
+        if (srcPos >= srcSize)
+            goto fail;
+
+        unsigned char flags = src[srcPos++];
+        bool compressed = ((flags & 0x80) != 0);
+
+        if (compressed)
+        {
+            int length = (flags & 0x7F) + 3;
+            unsigned char data = src[srcPos++];
+
+            if (destPos + length > destSize)
+                goto fail;
+
+            for (int i = 0; i < length; i++)
+                dest[destPos++] = data;
+        }
+        else
+        {
+            int length = (flags & 0x7F) + 1;
+
+            if (destPos + length > destSize)
+                goto fail;
+
+            for (int i = 0; i < length; i++)
+                dest[destPos++] = src[srcPos++];
+        }
+
+        if (destPos == destSize)
+        {
+            *uncompressedSize = destSize;
+            return dest;
+        }
+    }
+
+fail:
+    FATAL_ERROR("Fatal error while decompressing RL file.\n");
+}
+
+unsigned char *RLCompress(unsigned char *src, int srcSize, int *compressedSize)
+{
+    if (srcSize <= 0)
+        goto fail;
+
+    int worstCaseDestSize = 4 + srcSize * 2;
+
+    // Round up to the next multiple of four.
+    worstCaseDestSize = (worstCaseDestSize + 3) & ~3;
+
+    unsigned char *dest = malloc(worstCaseDestSize);
+
+    if (dest == NULL)
+        goto fail;
+
+    // header
+    dest[0] = 0x30; // RL compression type
+    dest[1] = (unsigned char)srcSize;
+    dest[2] = (unsigned char)(srcSize >> 8);
+    dest[3] = (unsigned char)(srcSize >> 16);
+
+    int srcPos = 0;
+    int destPos = 4;
+
+    for (;;)
+    {
+        bool compress = false;
+        int uncompressedStart = srcPos;
+        int uncompressedLength = 0;
+
+        while (srcPos < srcSize && uncompressedLength < (0x7F + 1))
+        {
+            compress = (srcPos + 2 < srcSize && src[srcPos] == src[srcPos + 1] && src[srcPos] == src[srcPos + 2]);
+
+            if (compress)
+                break;
+
+            srcPos++;
+            uncompressedLength++;
+        }
+        
+        if (uncompressedLength > 0)
+        {
+            dest[destPos++] = uncompressedLength - 1;
+
+            for (int i = 0; i < uncompressedLength; i++)
+                dest[destPos++] = src[uncompressedStart + i];
+        }
+
+        if (compress)
+        {
+            unsigned char data = src[srcPos];
+            int compressedLength = 0;
+
+            while (compressedLength < (0x7F + 3)
+                && srcPos + compressedLength < srcSize
+                && src[srcPos + compressedLength] == data)
+            {
+                compressedLength++;
+            }
+
+            dest[destPos++] = 0x80 | (compressedLength - 3);
+            dest[destPos++] = data;
+
+            srcPos += compressedLength;
+        }
+
+        if (srcPos == srcSize)
+        {
+            // Pad to multiple of 4 bytes.
+            int remainder = destPos % 4;
+
+            if (remainder != 0)
+            {
+                for (int i = 0; i < 4 - remainder; i++)
+                    dest[destPos++] = 0;
+            }
+
+            *compressedSize = destPos;
+            return dest;
+        }
+    }
+
+fail:
+    FATAL_ERROR("Fatal error while compressing RL file.\n");
+}
diff --git a/tools/gbagfx/rl.h b/tools/gbagfx/rl.h
new file mode 100644
index 000000000..02ad8d6d3
--- /dev/null
+++ b/tools/gbagfx/rl.h
@@ -0,0 +1,9 @@
+// Copyright (c) 2016 YamaArashi
+
+#ifndef RL_H
+#define RL_H
+
+unsigned char *RLDecompress(unsigned char *src, int srcSize, int *uncompressedSize);
+unsigned char *RLCompress(unsigned char *src, int srcSize, int *compressedSize);
+
+#endif // RL_H
diff --git a/tools/gbagfx/util.c b/tools/gbagfx/util.c
new file mode 100644
index 000000000..87abeb31c
--- /dev/null
+++ b/tools/gbagfx/util.c
@@ -0,0 +1,124 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <limits.h>
+#include "global.h"
+#include "util.h"
+
+bool ParseNumber(char *s, char **end, int radix, int *intValue)
+{
+	char *localEnd;
+
+	if (end == NULL)
+		end = &localEnd;
+
+	errno = 0;
+
+	const long longValue = strtol(s, end, radix);
+
+	if (*end == s)
+		return false; // not a number
+
+	if ((longValue == LONG_MIN || longValue == LONG_MAX) && errno == ERANGE)
+		return false;
+
+	if (longValue > INT_MAX)
+		return false;
+
+	if (longValue < INT_MIN)
+		return false;
+
+	*intValue = (int)longValue;
+
+	return true;
+}
+
+char *GetFileExtension(char *path)
+{
+	char *extension = path;
+
+	while (*extension != 0)
+		extension++;
+
+	while (extension > path && *extension != '.')
+		extension--;
+
+	if (extension == path)
+		return NULL;
+
+	extension++;
+
+	if (*extension == 0)
+		return NULL;
+
+	return extension;
+}
+
+unsigned char *ReadWholeFile(char *path, int *size)
+{
+	FILE *fp = fopen(path, "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+	fseek(fp, 0, SEEK_END);
+
+	*size = ftell(fp);
+
+	unsigned char *buffer = malloc(*size);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
+
+	rewind(fp);
+
+	if (fread(buffer, *size, 1, fp) != 1)
+		FATAL_ERROR("Failed to read \"%s\".\n", path);
+
+	fclose(fp);
+
+	return buffer;
+}
+
+unsigned char *ReadWholeFileZeroPadded(char *path, int *size, int padAmount)
+{
+	FILE *fp = fopen(path, "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+	fseek(fp, 0, SEEK_END);
+
+	*size = ftell(fp);
+
+	unsigned char *buffer = calloc(*size + padAmount, 1);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
+
+	rewind(fp);
+
+	if (fread(buffer, *size, 1, fp) != 1)
+		FATAL_ERROR("Failed to read \"%s\".\n", path);
+
+	fclose(fp);
+
+	return buffer;
+}
+
+void WriteWholeFile(char *path, void *buffer, int bufferSize)
+{
+	FILE *fp = fopen(path, "wb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
+
+	if (fwrite(buffer, bufferSize, 1, fp) != 1)
+		FATAL_ERROR("Failed to write to \"%s\".\n", path);
+
+	fclose(fp);
+}
diff --git a/tools/gbagfx/util.h b/tools/gbagfx/util.h
new file mode 100644
index 000000000..6d7a9c21e
--- /dev/null
+++ b/tools/gbagfx/util.h
@@ -0,0 +1,14 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdbool.h>
+
+bool ParseNumber(char *s, char **end, int radix, int *intValue);
+char *GetFileExtension(char *path);
+unsigned char *ReadWholeFile(char *path, int *size);
+unsigned char *ReadWholeFileZeroPadded(char *path, int *size, int padAmount);
+void WriteWholeFile(char *path, void *buffer, int bufferSize);
+
+#endif // UTIL_H
diff --git a/tools/mid2agb/.gitignore b/tools/mid2agb/.gitignore
new file mode 100644
index 000000000..0e7264c86
--- /dev/null
+++ b/tools/mid2agb/.gitignore
@@ -0,0 +1 @@
+mid2agb
diff --git a/tools/mid2agb/LICENSE b/tools/mid2agb/LICENSE
new file mode 100644
index 000000000..534d15349
--- /dev/null
+++ b/tools/mid2agb/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/mid2agb/Makefile b/tools/mid2agb/Makefile
new file mode 100644
index 000000000..f27f2cad4
--- /dev/null
+++ b/tools/mid2agb/Makefile
@@ -0,0 +1,15 @@
+CXX := g++
+
+CXXFLAGS := -std=c++11 -O2 -s -Wall -Wno-switch -Werror
+
+SRCS := agb.cpp error.cpp main.cpp midi.cpp tables.cpp
+
+HEADERS := agb.h error.h main.h midi.h tables.h
+
+.PHONY: clean
+
+mid2agb: $(SRCS) $(HEADERS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) mid2agb mid2agb.exe
diff --git a/tools/mid2agb/agb.cpp b/tools/mid2agb/agb.cpp
new file mode 100644
index 000000000..9ff1efa86
--- /dev/null
+++ b/tools/mid2agb/agb.cpp
@@ -0,0 +1,462 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdarg>
+#include <cstring>
+#include <vector>
+#include "agb.h"
+#include "main.h"
+#include "midi.h"
+#include "tables.h"
+
+int g_agbTrack;
+
+static std::string s_lastOpName;
+static int s_blockNum;
+static bool s_keepLastOpName;
+static int s_lastNote;
+static int s_lastVelocity;
+static bool s_noteChanged;
+static bool s_velocityChanged;
+static bool s_inPattern;
+static int s_extendedCommand;
+
+void PrintAgbHeader()
+{
+    std::fprintf(g_outputFile, "\t.include \"MPlayDef.s\"\n\n");
+    std::fprintf(g_outputFile, "\t.equ\t%s_grp, voicegroup%03u\n", g_asmLabel.c_str(), g_voiceGroup);
+    std::fprintf(g_outputFile, "\t.equ\t%s_pri, %u\n", g_asmLabel.c_str(), g_priority);
+
+    if (g_reverb >= 0)
+        std::fprintf(g_outputFile, "\t.equ\t%s_rev, reverb_set+%u\n", g_asmLabel.c_str(), g_reverb);
+    else
+        std::fprintf(g_outputFile, "\t.equ\t%s_rev, 0\n", g_asmLabel.c_str());
+
+    std::fprintf(g_outputFile, "\t.equ\t%s_mvl, %u\n", g_asmLabel.c_str(), g_masterVolume);
+    std::fprintf(g_outputFile, "\t.equ\t%s_key, %u\n", g_asmLabel.c_str(), 0);
+    std::fprintf(g_outputFile, "\t.equ\t%s_tbs, %u\n", g_asmLabel.c_str(), g_clocksPerBeat);
+    std::fprintf(g_outputFile, "\t.equ\t%s_exg, %u\n", g_asmLabel.c_str(), g_exactGateTime);
+    std::fprintf(g_outputFile, "\t.equ\t%s_cmp, %u\n", g_asmLabel.c_str(), g_compressionEnabled);
+
+    std::fprintf(g_outputFile, "\n\t.section .rodata\n");
+    std::fprintf(g_outputFile, "\t.global\t%s\n", g_asmLabel.c_str());
+
+    std::fprintf(g_outputFile, "\t.align\t2\n");
+}
+
+void ResetTrackVars()
+{
+    s_lastVelocity = -1;
+    s_lastNote = -1;
+    s_velocityChanged = false;
+    s_noteChanged = false;
+    s_keepLastOpName = false;
+    s_lastOpName = "";
+    s_inPattern = false;
+}
+
+void PrintWait(int wait)
+{
+    if (wait > 0)
+    {
+        std::fprintf(g_outputFile, "\t.byte\tW%02d\n", wait);
+        s_velocityChanged = true;
+        s_noteChanged = true;
+        s_keepLastOpName = true;
+    }
+}
+
+void PrintOp(int wait, std::string name, const char *format, ...)
+{
+    std::va_list args;
+    va_start(args, format);
+    std::fprintf(g_outputFile, "\t.byte\t\t");
+
+    if (format != nullptr)
+    {
+        if (!g_compressionEnabled || s_lastOpName != name)
+        {
+            std::fprintf(g_outputFile, "%s, ", name.c_str());
+            s_lastOpName = name;
+        }
+        else
+        {
+            std::fprintf(g_outputFile, "        ");
+        }
+        std::vfprintf(g_outputFile, format, args);
+    }
+    else
+    {
+        std::fputs(name.c_str(), g_outputFile);
+        s_lastOpName = name;
+    }
+
+    std::fprintf(g_outputFile, "\n");
+
+    va_end(args);
+
+    PrintWait(wait);
+}
+
+void PrintByte(const char *format, ...)
+{
+    std::va_list args;
+    va_start(args, format);
+    std::fprintf(g_outputFile, "\t.byte\t");
+    std::vfprintf(g_outputFile, format, args);
+    std::fprintf(g_outputFile, "\n");
+    s_velocityChanged = true;
+    s_noteChanged = true;
+    s_keepLastOpName = true;
+    va_end(args);
+}
+
+void PrintWord(const char *format, ...)
+{
+    std::va_list args;
+    va_start(args, format);
+    std::fprintf(g_outputFile, "\t .word\t");
+    std::vfprintf(g_outputFile, format, args);
+    std::fprintf(g_outputFile, "\n");
+    va_end(args);
+}
+
+void PrintNote(const Event& event)
+{
+    int note = event.note;
+    int velocity = g_noteVelocityLUT[event.param1];
+    int duration = -1;
+
+    if (event.param2 != -1)
+        duration = g_noteDurationLUT[event.param2];
+
+    int gateTimeParam = 0;
+
+    if (g_exactGateTime && duration != -1)
+        gateTimeParam = event.param2 - duration;
+
+    char gtpBuf[16];
+
+    if (gateTimeParam > 0)
+        std::snprintf(gtpBuf, sizeof(gtpBuf), ", gtp%u", gateTimeParam);
+    else
+        gtpBuf[0] = 0;
+
+    char opName[16];
+
+    if (duration == -1)
+        std::strcpy(opName, "TIE   ");
+    else
+        std::snprintf(opName, sizeof(opName), "N%02u   ", duration);
+
+    bool noteChanged = true;
+    bool velocityChanged = true;
+
+    if (g_compressionEnabled)
+    {
+        noteChanged = (note != s_lastNote);
+        velocityChanged = (velocity != s_lastVelocity);
+    }
+
+    if (s_keepLastOpName)
+        s_keepLastOpName = false;
+    else
+        s_lastOpName = "";
+
+    if (noteChanged || velocityChanged || (gateTimeParam > 0))
+    {
+        s_lastNote = note;
+
+        char noteBuf[16];
+
+        if (note >= 24)
+            std::snprintf(noteBuf, sizeof(noteBuf), g_noteTable[note % 12], note / 12 - 2);
+        else
+            std::snprintf(noteBuf, sizeof(noteBuf), g_minusNoteTable[note % 12], note / -12 + 2);
+
+        char velocityBuf[16];
+
+        if (velocityChanged || (gateTimeParam > 0))
+        {
+            s_lastVelocity = velocity;
+            std::snprintf(velocityBuf, sizeof(velocityBuf), ", v%03u", velocity);
+        }
+        else
+        {
+            velocityBuf[0] = 0;
+        }
+
+        PrintOp(event.time, opName, "%s%s%s", noteBuf, velocityBuf, gtpBuf);
+    }
+    else
+    {
+        PrintOp(event.time, opName, 0);
+    }
+
+    s_noteChanged = noteChanged;
+    s_velocityChanged = velocityChanged;
+}
+
+void PrintEndOfTieOp(const Event& event)
+{
+    int note = event.note;
+    bool noteChanged = (note != s_lastNote);
+
+    if (!noteChanged || !s_noteChanged)
+        s_lastOpName = "";
+
+    if (!noteChanged && g_compressionEnabled)
+    {
+        PrintOp(event.time, "EOT   ", nullptr);
+    }
+    else
+    {
+        s_lastNote = note;
+        if (note >= 24)
+            PrintOp(event.time, "EOT   ", g_noteTable[note % 12], note / 12 - 2);
+        else
+            PrintOp(event.time, "EOT   ", g_minusNoteTable[note % 12], note / -12 + 2);
+    }
+
+    s_noteChanged = noteChanged;
+}
+
+void PrintSeqLoopLabel(const Event& event)
+{
+    s_blockNum = event.param1 + 1;
+    std::fprintf(g_outputFile, "%s_%u_B%u:\n", g_asmLabel.c_str(), g_agbTrack, s_blockNum);
+    PrintWait(event.time);
+    ResetTrackVars();
+}
+
+void PrintExtendedOp(const Event& event)
+{
+    // TODO: support for other extended commands
+
+    switch (s_extendedCommand)
+    {
+    case 0x08:
+        PrintOp(event.time, "XCMD  ", "xIECV , %u", event.param2);
+        break;
+    case 0x09:
+        PrintOp(event.time, "XCMD  ", "xIECL , %u", event.param2);
+        break;
+    default:
+        PrintWait(event.time);
+        break;
+    }
+}
+
+void PrintControllerOp(const Event& event)
+{
+    switch (event.param1)
+    {
+    case 0x01:
+        PrintOp(event.time, "MOD   ", "%u", event.param2);
+        break;
+    case 0x07:
+        PrintOp(event.time, "VOL   ", "%u*%s_mvl/mxv", event.param2, g_asmLabel.c_str());
+        break;
+    case 0x0A:
+        PrintOp(event.time, "PAN   ", "c_v%+d", event.param2 - 64);
+        break;
+    case 0x0C:
+    case 0x10:
+        // TODO: memacc
+        break;
+    case 0x0D:
+        // TODO: memacc var
+        break;
+    case 0x0E:
+        // TODO: memacc var
+        break;
+    case 0x0F:
+        // TODO: memacc var
+        break;
+    case 0x11:
+        std::fprintf(g_outputFile, "%s_%u_L%u:\n", g_asmLabel.c_str(), g_agbTrack, event.param2);
+        PrintWait(event.time);
+        ResetTrackVars();
+        break;
+    case 0x14:
+        PrintOp(event.time, "BENDR ", "%u", event.param2);
+        break;
+    case 0x15:
+        PrintOp(event.time, "LFOS  ", "%u", event.param2);
+        break;
+    case 0x16:
+        PrintOp(event.time, "MODT  ", "%u", event.param2);
+        break;
+    case 0x18:
+        PrintOp(event.time, "TUNE  ", "c_v%+d", event.param2 - 64);
+        break;
+    case 0x1A:
+        PrintOp(event.time, "LFODL ", "%u", event.param2);
+        break;
+    case 0x1D:
+    case 0x1F:
+        PrintExtendedOp(event);
+        break;
+    case 0x1E:
+        s_extendedCommand = event.param2;
+        // TODO: loop op
+        break;
+    case 0x21:
+    case 0x27:
+        PrintByte("PRIO  , %u", event.param2);
+        PrintWait(event.time);
+        break;
+    default:
+        PrintWait(event.time);
+        break;
+    }
+}
+
+void PrintAgbTrack(std::vector<Event>& events)
+{
+    std::fprintf(g_outputFile, "\n@**************** Track %u (Midi-Chn.%u) ****************@\n\n", g_agbTrack, g_midiChan + 1);
+    std::fprintf(g_outputFile, "%s_%u:\n", g_asmLabel.c_str(), g_agbTrack);
+    PrintWait(g_initialWait);
+    PrintByte("KEYSH , %s_key%+d", g_asmLabel.c_str(), 0);
+
+    int wholeNoteCount = 0;
+    int loopEndBlockNum = 0;
+
+    ResetTrackVars();
+
+    bool foundVolBeforeNote = false;
+
+    for (const Event& event : events)
+    {
+        if (event.type == EventType::Note)
+            break;
+
+        if (event.type == EventType::Controller && event.param1 == 0x07)
+        {
+            foundVolBeforeNote = true;
+            break;
+        }
+    }
+
+    if (!foundVolBeforeNote)
+        PrintByte("\tVOL   , 127*%s_mvl/mxv", g_asmLabel.c_str());
+
+    for (unsigned i = 0; events[i].type != EventType::EndOfTrack; i++)
+    {
+        const Event& event = events[i];
+
+        if (IsPatternBoundary(event.type))
+        {
+            if (s_inPattern)
+                PrintByte("PEND");
+            s_inPattern = false;
+        }
+
+        if (event.type == EventType::WholeNoteMark || event.type == EventType::Pattern)
+            std::fprintf(g_outputFile, "@ %03d   ----------------------------------------\n", wholeNoteCount++);
+
+        switch (event.type)
+        {
+        case EventType::Note:
+            PrintNote(event);
+            break;
+        case EventType::EndOfTie:
+            PrintEndOfTieOp(event);
+            break;
+        case EventType::Label:
+            PrintSeqLoopLabel(event);
+            break;
+        case EventType::LoopEnd:
+            PrintByte("GOTO");
+            PrintWord("%s_%u_B%u", g_asmLabel.c_str(), g_agbTrack, loopEndBlockNum);
+            PrintSeqLoopLabel(event);
+            break;
+        case EventType::LoopEndBegin:
+            PrintByte("GOTO");
+            PrintWord("%s_%u_B%u", g_asmLabel.c_str(), g_agbTrack, loopEndBlockNum);
+            PrintSeqLoopLabel(event);
+            loopEndBlockNum = s_blockNum;
+            break;
+        case EventType::LoopBegin:
+            PrintSeqLoopLabel(event);
+            loopEndBlockNum = s_blockNum;
+            break;
+        case EventType::WholeNoteMark:
+            if (event.param2 & 0x80000000)
+            {
+                std::fprintf(g_outputFile, "%s_%u_%03lu:\n", g_asmLabel.c_str(), g_agbTrack, (unsigned long)(event.param2 & 0x7FFFFFFF));
+                ResetTrackVars();
+                s_inPattern = true;
+            }
+            PrintWait(event.time);
+            break;
+        case EventType::Pattern:
+            PrintByte("PATT");
+            PrintWord("%s_%u_%03lu", g_asmLabel.c_str(), g_agbTrack, event.param2);
+
+            while (!IsPatternBoundary(events[i + 1].type))
+                i++;
+
+            ResetTrackVars();
+            break;
+        case EventType::Tempo:
+            PrintByte("TEMPO , %u*%s_tbs/2", 60000000 / event.param2, g_asmLabel.c_str());
+            PrintWait(event.time);
+            break;
+        case EventType::InstrumentChange:
+            PrintOp(event.time, "VOICE ", "%u", event.param1);
+            break;
+        case EventType::PitchBend:
+            PrintOp(event.time, "BEND  ", "c_v%+d", event.param2 - 64);
+            break;
+        case EventType::Controller:
+            PrintControllerOp(event);
+            break;
+        default:
+            PrintWait(event.time);
+            break;
+        }
+    }
+
+    PrintByte("FINE");
+}
+
+void PrintAgbFooter()
+{
+    int trackCount = g_agbTrack - 1;
+
+    std::fprintf(g_outputFile, "\n@******************************************************@\n");
+    std::fprintf(g_outputFile, "\t.align\t2\n");
+    std::fprintf(g_outputFile, "\n%s:\n", g_asmLabel.c_str());
+    std::fprintf(g_outputFile, "\t.byte\t%u\t@ NumTrks\n", trackCount);
+    std::fprintf(g_outputFile, "\t.byte\t%u\t@ NumBlks\n", 0);
+    std::fprintf(g_outputFile, "\t.byte\t%s_pri\t@ Priority\n", g_asmLabel.c_str());
+    std::fprintf(g_outputFile, "\t.byte\t%s_rev\t@ Reverb.\n", g_asmLabel.c_str());
+    std::fprintf(g_outputFile, "\n");
+    std::fprintf(g_outputFile, "\t.word\t%s_grp\n", g_asmLabel.c_str());
+    std::fprintf(g_outputFile, "\n");
+
+    // track pointers
+    for (int i = 1; i <= trackCount; i++)
+        std::fprintf(g_outputFile, "\t.word\t%s_%u\n", g_asmLabel.c_str(), i);
+
+    std::fprintf(g_outputFile, "\n\t.end\n");
+}
diff --git a/tools/mid2agb/agb.h b/tools/mid2agb/agb.h
new file mode 100644
index 000000000..7eab3c143
--- /dev/null
+++ b/tools/mid2agb/agb.h
@@ -0,0 +1,33 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef AGB_H
+#define AGB_H
+
+#include <vector>
+#include "midi.h"
+
+void PrintAgbHeader();
+void PrintAgbTrack(std::vector<Event>& events);
+void PrintAgbFooter();
+
+extern int g_agbTrack;
+
+#endif // AGB_H
diff --git a/tools/mid2agb/error.cpp b/tools/mid2agb/error.cpp
new file mode 100644
index 000000000..13e38ffa8
--- /dev/null
+++ b/tools/mid2agb/error.cpp
@@ -0,0 +1,36 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstdarg>
+
+// Reports an error diagnostic and terminates the program.
+[[noreturn]] void RaiseError(const char* format, ...)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+    std::va_list args;
+    va_start(args, format);
+    std::vsnprintf(buffer, bufferSize, format, args);
+    std::fprintf(stderr, "error: %s\n", buffer);
+    va_end(args);
+    std::exit(1);
+}
diff --git a/tools/mid2agb/error.h b/tools/mid2agb/error.h
new file mode 100644
index 000000000..da4f01142
--- /dev/null
+++ b/tools/mid2agb/error.h
@@ -0,0 +1,26 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef ERROR_H
+#define ERROR_H
+
+[[noreturn]] void RaiseError(const char* format, ...);
+
+#endif // ERROR_H
diff --git a/tools/mid2agb/main.cpp b/tools/mid2agb/main.cpp
new file mode 100644
index 000000000..9b883fba5
--- /dev/null
+++ b/tools/mid2agb/main.cpp
@@ -0,0 +1,230 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <cctype>
+#include <cassert>
+#include <string>
+#include <set>
+#include "main.h"
+#include "error.h"
+#include "midi.h"
+#include "agb.h"
+
+FILE* g_inputFile = nullptr;
+FILE* g_outputFile = nullptr;
+
+std::string g_asmLabel;
+int g_masterVolume = 127;
+int g_voiceGroup = 0;
+int g_priority = 0;
+int g_reverb = -1;
+int g_clocksPerBeat = 1;
+bool g_exactGateTime = false;
+bool g_compressionEnabled = true;
+
+[[noreturn]] static void PrintUsage()
+{
+    std::printf(
+        "Usage: MID2AGB name [options]\n"
+        "\n"
+        "    input_file  filename(.mid) of MIDI file\n"
+        "   output_file  filename(.s) for AGB file (default:input_file)\n"
+        "\n"
+        "options  -V???  master volume (default:127)\n"
+        "         -G???  voice group number (default:0)\n"
+        "         -P???  priority (default:0)\n"
+        "         -R???  reverb (default:off)\n"
+        "            -X  48 clocks/beat (default:24 clocks/beat)\n"
+        "            -E  exact gate-time\n"
+        "            -N  no compression\n"
+    );
+    std::exit(1);
+}
+
+static std::string StripExtension(std::string s)
+{
+    std::size_t pos = s.find_last_of('.');
+
+    if (pos > 0 && pos != std::string::npos)
+    {
+        s = s.substr(0, pos);
+    }
+
+    return s;
+}
+
+static std::string GetExtension(std::string s)
+{
+    std::size_t pos = s.find_last_of('.');
+
+    if (pos > 0 && pos != std::string::npos)
+    {
+        return s.substr(pos + 1);
+    }
+
+    return "";
+}
+
+struct Option
+{
+    char letter = 0;
+    const char *arg = NULL;
+};
+
+static Option ParseOption(int& index, const int argc, char** argv)
+{
+    static std::set<char> optionsWithArg = { 'L', 'V', 'G', 'P', 'R' };
+    static std::set<char> optionsWithoutArg = { 'X', 'E', 'N' };
+
+    assert(index >= 0 && index < argc);
+
+    const char *opt = argv[index];
+
+    assert(opt[0] == '-');
+    assert(std::strlen(opt) == 2);
+
+    char letter = std::toupper(opt[1]);
+
+    bool isOption = false;
+    bool hasArg = false;
+
+    if (optionsWithArg.count(letter) != 0)
+    {
+        isOption = true;
+        hasArg = true;
+    }
+    else if (optionsWithoutArg.count(letter) != 0)
+    {
+        isOption = true;
+    }
+
+    if (!isOption)
+        PrintUsage();
+
+    Option retVal;
+
+    retVal.letter = letter;
+
+    if (hasArg)
+    {
+        index++;
+
+        if (index >= argc)
+            RaiseError("missing argument for \"-%c\"", letter);
+
+        retVal.arg = argv[index];
+    }
+
+    return retVal;
+}
+
+int main(int argc, char** argv)
+{
+    std::string inputFilename;
+    std::string outputFilename;
+
+    for (int i = 1; i < argc; i++)
+    {
+        if (argv[i][0] == '-' && std::strlen(argv[i]) == 2)
+        {
+            Option option = ParseOption(i, argc, argv);
+
+            switch (option.letter)
+            {
+            case 'E':
+                g_exactGateTime = true;
+                break;
+            case 'G':
+                g_voiceGroup = std::stoi(option.arg);
+                break;
+            case 'L':
+                g_asmLabel = option.arg;
+                break;
+            case 'N':
+                g_compressionEnabled = false;
+                break;
+            case 'P':
+                g_priority = std::stoi(option.arg);
+                break;
+            case 'R':
+                g_reverb = std::stoi(option.arg);
+                break;
+            case 'V':
+                g_masterVolume = std::stoi(option.arg);
+                break;
+            case 'X':
+                g_clocksPerBeat = 2;
+                break;
+            }
+        }
+        else
+        {
+            switch (i)
+            {
+            case 1:
+                inputFilename = argv[i];
+                break;
+            case 2:
+                outputFilename = argv[i];
+                break;
+            default:
+                PrintUsage();
+            }
+        }
+    }
+
+    if (inputFilename.empty())
+        PrintUsage();
+
+    if (GetExtension(inputFilename) != "mid")
+        RaiseError("input filename extension is not \"mid\"");
+
+    if (outputFilename.empty())
+        outputFilename = StripExtension(inputFilename) + ".s";
+
+    if (GetExtension(outputFilename) != "s")
+        RaiseError("output filename extension is not \"s\"");
+
+    if (g_asmLabel.empty())
+        g_asmLabel = StripExtension(outputFilename);
+
+    g_inputFile = std::fopen(inputFilename.c_str(), "rb");
+
+    if (g_inputFile == nullptr)
+        RaiseError("failed to open \"%s\" for reading", inputFilename.c_str());
+
+    g_outputFile = std::fopen(outputFilename.c_str(), "w");
+
+    if (g_outputFile == nullptr)
+        RaiseError("failed to open \"%s\" for writing", outputFilename.c_str());
+
+    ReadMidiFileHeader();
+    PrintAgbHeader();
+    ReadMidiTracks();
+    PrintAgbFooter();
+
+    std::fclose(g_inputFile);
+    std::fclose(g_outputFile);
+
+    return 0;
+}
diff --git a/tools/mid2agb/main.h b/tools/mid2agb/main.h
new file mode 100644
index 000000000..6e71e73fd
--- /dev/null
+++ b/tools/mid2agb/main.h
@@ -0,0 +1,39 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef MAIN_H
+#define MAIN_H
+
+#include <cstdio>
+#include <string>
+
+extern FILE* g_inputFile;
+extern FILE* g_outputFile;
+
+extern std::string g_asmLabel;
+extern int g_masterVolume;
+extern int g_voiceGroup;
+extern int g_priority;
+extern int g_reverb;
+extern int g_clocksPerBeat;
+extern bool g_exactGateTime;
+extern bool g_compressionEnabled;
+
+#endif // MAIN_H
diff --git a/tools/mid2agb/midi.cpp b/tools/mid2agb/midi.cpp
new file mode 100644
index 000000000..ba5dd654a
--- /dev/null
+++ b/tools/mid2agb/midi.cpp
@@ -0,0 +1,942 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cassert>
+#include <string>
+#include <vector>
+#include <algorithm>
+#include <memory>
+#include "midi.h"
+#include "main.h"
+#include "error.h"
+#include "agb.h"
+#include "tables.h"
+
+enum class MidiEventCategory
+{
+    Control,
+    SysEx,
+    Meta,
+    Invalid,
+};
+
+MidiFormat g_midiFormat;
+std::int_fast32_t g_midiTrackCount;
+std::int16_t g_midiTimeDiv;
+
+int g_midiChan;
+std::int32_t g_initialWait;
+
+static long s_trackDataStart;
+static std::vector<Event> s_seqEvents;
+static std::vector<Event> s_trackEvents;
+static std::int32_t s_absoluteTime;
+static int s_blockCount = 0;
+static int s_minNote;
+static int s_maxNote;
+
+void Seek(long offset)
+{
+    if (std::fseek(g_inputFile, offset, SEEK_SET) != 0)
+        RaiseError("failed to seek to %l", offset);
+}
+
+void Skip(long offset)
+{
+    if (std::fseek(g_inputFile, offset, SEEK_CUR) != 0)
+        RaiseError("failed to skip %l bytes", offset);
+}
+
+std::string ReadSignature()
+{
+    char signature[4];
+
+    if (std::fread(signature, 4, 1, g_inputFile) != 1)
+        RaiseError("failed to read signature");
+
+    return std::string(signature, 4);
+}
+
+std::uint32_t ReadInt8()
+{
+    int c = std::fgetc(g_inputFile);
+
+    if (c < 0)
+        RaiseError("unexpected EOF");
+
+    return c;
+}
+
+std::uint32_t ReadInt16()
+{
+    std::uint32_t val = 0;
+    val |= ReadInt8() << 8;
+    val |= ReadInt8();
+    return val;
+}
+
+std::uint32_t ReadInt24()
+{
+    std::uint32_t val = 0;
+    val |= ReadInt8() << 16;
+    val |= ReadInt8() << 8;
+    val |= ReadInt8();
+    return val;
+}
+
+std::uint32_t ReadInt32()
+{
+    std::uint32_t val = 0;
+    val |= ReadInt8() << 24;
+    val |= ReadInt8() << 16;
+    val |= ReadInt8() << 8;
+    val |= ReadInt8();
+    return val;
+}
+
+std::uint32_t ReadVLQ()
+{
+    std::uint32_t val = 0;
+    std::uint32_t c;
+
+    do
+    {
+        c = ReadInt8();
+        val <<= 7;
+        val |= (c & 0x7F);
+    } while (c & 0x80);
+
+    return val;
+}
+
+void ReadMidiFileHeader()
+{
+    Seek(0);
+
+    if (ReadSignature() != "MThd")
+        RaiseError("MIDI file header signature didn't match \"MThd\"");
+
+    std::uint32_t headerLength = ReadInt32();
+
+    if (headerLength != 6)
+        RaiseError("MIDI file header length isn't 6");
+
+    std::uint16_t midiFormat = ReadInt16();
+
+    if (midiFormat >= 2)
+        RaiseError("unsupported MIDI format (%u)", midiFormat);
+
+    g_midiFormat = (MidiFormat)midiFormat;
+    g_midiTrackCount = ReadInt16();
+    g_midiTimeDiv = ReadInt16();
+
+    if (g_midiTimeDiv < 0)
+        RaiseError("unsupported MIDI time division (%d)", g_midiTimeDiv);
+}
+
+long ReadMidiTrackHeader(long offset)
+{
+    Seek(offset);
+
+    if (ReadSignature() != "MTrk")
+        RaiseError("MIDI track header signature didn't match \"MTrk\"");
+
+    long size = ReadInt32();
+
+    s_trackDataStart = std::ftell(g_inputFile);
+
+    return size + 8;
+}
+
+void StartTrack()
+{
+    Seek(s_trackDataStart);
+    s_absoluteTime = 0;
+}
+
+void SkipEventData()
+{
+    Skip(ReadVLQ());
+}
+
+void DetermineEventCategory(MidiEventCategory& category, int& typeChan, int& size)
+{
+    typeChan = ReadInt8();
+
+    if (typeChan == 0xFF)
+    {
+        category = MidiEventCategory::Meta;
+        size = 0;
+    }
+    else if (typeChan >= 0xF0)
+    {
+        category = MidiEventCategory::SysEx;
+        size = 0;
+    }
+    else if (typeChan >= 0x80)
+    {
+        category = MidiEventCategory::Control;
+
+        switch (typeChan >> 4)
+        {
+        case 0xC:
+        case 0xD:
+            size = 1;
+            break;
+        default:
+            size = 2;
+            break;
+        }
+    }
+    else
+    {
+        category = MidiEventCategory::Invalid;
+    }
+}
+
+void MakeBlockEvent(Event& event, EventType type)
+{
+    event.type = type;
+    event.param1 = s_blockCount++;
+    event.param2 = 0;
+}
+
+std::string ReadEventText()
+{
+    char buffer[2];
+    std::uint32_t length = ReadVLQ();
+
+    if (length <= 2)
+    {
+        if (fread(buffer, length, 1, g_inputFile) != 1)
+            RaiseError("failed to read event text");
+    }
+    else
+    {
+        Skip(length);
+        length = 0;
+    }
+
+    return std::string(buffer, length);
+}
+
+bool ReadSeqEvent(Event& event)
+{
+    s_absoluteTime += ReadVLQ();
+    event.time = s_absoluteTime;
+
+    MidiEventCategory category;
+    int typeChan;
+    int size;
+
+    DetermineEventCategory(category, typeChan, size);
+
+    if (category == MidiEventCategory::Control)
+    {
+        Skip(size);
+        return false;
+    }
+
+    if (category == MidiEventCategory::SysEx)
+    {
+        SkipEventData();
+        return false;
+    }
+
+    if (category == MidiEventCategory::Invalid)
+        RaiseError("invalid event");
+
+    // meta event
+    int metaEventType = ReadInt8();
+
+    if (metaEventType >= 1 && metaEventType <= 7)
+    {
+        // text event
+        std::string text = ReadEventText();
+
+        if (text == "[")
+            MakeBlockEvent(event, EventType::LoopBegin);
+        else if (text == "][")
+            MakeBlockEvent(event, EventType::LoopEndBegin);
+        else if (text == "]")
+            MakeBlockEvent(event, EventType::LoopEnd);
+        else if (text == ":")
+            MakeBlockEvent(event, EventType::Label);
+        else
+            return false;
+    }
+    else
+    {
+        switch (metaEventType)
+        {
+        case 0x2F: // end of track
+            SkipEventData();
+            event.type = EventType::EndOfTrack;
+            event.param1 = 0;
+            event.param2 = 0;
+            break;
+        case 0x51: // tempo
+            if (ReadVLQ() != 3)
+                RaiseError("invalid tempo size");
+
+            event.type = EventType::Tempo;
+            event.param1 = 0;
+            event.param2 = ReadInt24();
+            break;
+        case 0x58: // time signature
+        {
+            if (ReadVLQ() != 4)
+                RaiseError("invalid time signature size");
+
+            int numerator = ReadInt8();
+            int denominatorExponent = ReadInt8();
+
+            if (denominatorExponent >= 16)
+                RaiseError("invalid time signature denominator");
+
+            Skip(2); // ignore other values
+
+            int clockTicks = 96 * numerator * g_clocksPerBeat;
+            int denominator = 1 << denominatorExponent;
+            int timeSig = clockTicks / denominator;
+
+            if (timeSig <= 0 || timeSig >= 0x10000)
+                RaiseError("invalid time signature");
+
+            event.type = EventType::TimeSignature;
+            event.param1 = 0;
+            event.param2 = timeSig;
+            break;
+        }
+        default:
+            SkipEventData();
+            return false;
+        }
+    }
+
+    return true;
+}
+
+void ReadSeqEvents()
+{
+    StartTrack();
+
+    for (;;)
+    {
+        Event event = {};
+
+        if (ReadSeqEvent(event))
+        {
+            s_seqEvents.push_back(event);
+
+            if (event.type == EventType::EndOfTrack)
+                return;
+        }
+    }
+}
+
+bool CheckNoteEnd(Event& event)
+{
+    event.param2 += ReadVLQ();
+
+    MidiEventCategory category;
+    int typeChan;
+    int size;
+
+    DetermineEventCategory(category, typeChan, size);
+
+    if (category == MidiEventCategory::Control)
+    {
+        int chan = typeChan & 0xF;
+
+        if (chan != g_midiChan)
+        {
+            Skip(size);
+            return false;
+        }
+
+        switch (typeChan & 0xF0)
+        {
+        case 0x80: // note off
+        {
+            int note = ReadInt8();
+            ReadInt8(); // ignore velocity
+            if (note == event.note)
+                return true;
+            break;
+        }
+        case 0x90: // note on
+        {
+            int note = ReadInt8();
+            int velocity = ReadInt8();
+            if (velocity == 0 && note == event.note)
+                return true;
+            break;
+        }
+        default:
+            Skip(size);
+            break;
+        }
+
+        return false;
+    }
+
+    if (category == MidiEventCategory::SysEx)
+    {
+        SkipEventData();
+        return false;
+    }
+
+    if (category == MidiEventCategory::Meta)
+    {
+        int metaEventType = ReadInt8();
+        SkipEventData();
+
+        if (metaEventType == 0x2F)
+            RaiseError("note doesn't end");
+
+        return false;
+    }
+
+    RaiseError("invalid event");
+}
+
+void FindNoteEnd(Event& event)
+{
+    long startPos = ftell(g_inputFile);
+
+    event.param2 = 0;
+
+    while (!CheckNoteEnd(event))
+        ;
+
+    Seek(startPos);
+}
+
+bool ReadTrackEvent(Event& event)
+{
+    s_absoluteTime += ReadVLQ();
+    event.time = s_absoluteTime;
+
+    MidiEventCategory category;
+    int typeChan;
+    int size;
+
+    DetermineEventCategory(category, typeChan, size);
+
+    if (category == MidiEventCategory::Control)
+    {
+        int chan = typeChan & 0xF;
+
+        if (chan != g_midiChan)
+        {
+            Skip(size);
+            return false;
+        }
+
+        switch (typeChan & 0xF0)
+        {
+        case 0x90: // note on
+        {
+            int note = ReadInt8();
+            int velocity = ReadInt8();
+
+            if (velocity != 0)
+            {
+                event.type = EventType::Note;
+                event.note = note;
+                event.param1 = velocity;
+                FindNoteEnd(event);
+                if (event.param2 > 0)
+                {
+                    if (note < s_minNote)
+                        s_minNote = note;
+                    if (note > s_maxNote)
+                        s_maxNote = note;
+                }
+            }
+            break;
+        }
+        case 0xB0: // controller event
+            event.type = EventType::Controller;
+            event.param1 = ReadInt8(); // controller index
+            event.param2 = ReadInt8(); // value
+            break;
+        case 0xC0: // instrument change
+            event.type = EventType::InstrumentChange;
+            event.param1 = ReadInt8(); // instrument
+            event.param2 = 0;
+            break;
+        case 0xE0: // pitch bend
+            event.type = EventType::PitchBend;
+            event.param1 = ReadInt8();
+            event.param2 = ReadInt8();
+            break;
+        default:
+            Skip(size);
+            return false;
+        }
+
+        return true;
+    }
+
+    if (category == MidiEventCategory::SysEx)
+    {
+        SkipEventData();
+        return false;
+    }
+
+    if (category == MidiEventCategory::Meta)
+    {
+        int metaEventType = ReadInt8();
+        SkipEventData();
+
+        if (metaEventType == 0x2F)
+        {
+            event.type = EventType::EndOfTrack;
+            event.param1 = 0;
+            event.param2 = 0;
+            return true;
+        }
+
+        return false;
+    }
+
+    RaiseError("invalid event");
+}
+
+void ReadTrackEvents()
+{
+    StartTrack();
+
+    s_trackEvents.clear();
+
+    s_minNote = 0xFF;
+    s_maxNote = 0;
+
+    for (;;)
+    {
+        Event event = {};
+
+        if (ReadTrackEvent(event))
+        {
+            s_trackEvents.push_back(event);
+
+            if (event.type == EventType::EndOfTrack)
+                return;
+        }
+    }
+}
+
+bool EventCompare(const Event& event1, const Event& event2)
+{
+    if (event1.time < event2.time)
+        return true;
+
+    if (event1.time > event2.time)
+        return false;
+
+    unsigned event1Type = (unsigned)event1.type;
+    unsigned event2Type = (unsigned)event2.type;
+
+    if (event1.type == EventType::Note)
+        event1Type += event1.note;
+
+    if (event2.type == EventType::Note)
+        event2Type += event2.note;
+
+    if (event1Type < event2Type)
+        return true;
+
+    if (event1Type > event2Type)
+        return false;
+
+    if (event1.type == EventType::EndOfTie)
+    {
+        if (event1.note < event2.note)
+            return true;
+
+        if (event1.note > event2.note)
+            return false;
+    }
+
+    return false;
+}
+
+std::unique_ptr<std::vector<Event>> MergeEvents()
+{
+    std::unique_ptr<std::vector<Event>> events(new std::vector<Event>());
+
+    unsigned trackEventPos = 0;
+    unsigned seqEventPos = 0;
+
+    while (s_trackEvents[trackEventPos].type != EventType::EndOfTrack
+        && s_seqEvents[seqEventPos].type != EventType::EndOfTrack)
+    {
+        if (EventCompare(s_trackEvents[trackEventPos], s_seqEvents[seqEventPos]))
+            events->push_back(s_trackEvents[trackEventPos++]);
+        else
+            events->push_back(s_seqEvents[seqEventPos++]);
+    }
+
+    while (s_trackEvents[trackEventPos].type != EventType::EndOfTrack)
+        events->push_back(s_trackEvents[trackEventPos++]);
+
+    while (s_seqEvents[seqEventPos].type != EventType::EndOfTrack)
+        events->push_back(s_seqEvents[seqEventPos++]);
+
+    // Push the EndOfTrack event with the larger time.
+    if (EventCompare(s_trackEvents[trackEventPos], s_seqEvents[seqEventPos]))
+        events->push_back(s_seqEvents[seqEventPos]);
+    else
+        events->push_back(s_trackEvents[trackEventPos]);
+
+    return events;
+}
+
+void ConvertTimes(std::vector<Event>& events)
+{
+    for (Event& event : events)
+    {
+        event.time = (24 * g_clocksPerBeat * event.time) / g_midiTimeDiv;
+
+        if (event.type == EventType::Note)
+        {
+            event.param1 = g_noteVelocityLUT[event.param1];
+
+            std::uint32_t duration = (24 * g_clocksPerBeat * event.param2) / g_midiTimeDiv;
+
+            if (duration == 0)
+                duration = 1;
+
+            if (!g_exactGateTime && duration < 96)
+                duration = g_noteDurationLUT[duration];
+
+            event.param2 = duration;
+        }
+    }
+}
+
+std::unique_ptr<std::vector<Event>> InsertTimingEvents(std::vector<Event>& inEvents)
+{
+    std::unique_ptr<std::vector<Event>> outEvents(new std::vector<Event>());
+
+    Event timingEvent = {};
+    timingEvent.time = 0;
+    timingEvent.type = EventType::TimeSignature;
+    timingEvent.param2 = 96 * g_clocksPerBeat;
+
+    for (const Event& event : inEvents)
+    {
+        while (EventCompare(timingEvent, event))
+        {
+            outEvents->push_back(timingEvent);
+            timingEvent.time += timingEvent.param2;
+        }
+
+        if (event.type == EventType::TimeSignature)
+        {
+            if (g_agbTrack == 1 && event.param2 != timingEvent.param2)
+            {
+                Event originalTimingEvent = event;
+                originalTimingEvent.type = EventType::OriginalTimeSignature;
+                outEvents->push_back(originalTimingEvent);
+            }
+            timingEvent.param2 = event.param2;
+            timingEvent.time = event.time + timingEvent.param2;
+        }
+
+        outEvents->push_back(event);
+    }
+
+    return outEvents;
+}
+
+std::unique_ptr<std::vector<Event>> SplitTime(std::vector<Event>& inEvents)
+{
+    std::unique_ptr<std::vector<Event>> outEvents(new std::vector<Event>());
+
+    std::int32_t time = 0;
+
+    for (const Event& event : inEvents)
+    {
+        std::int32_t diff = event.time - time;
+
+        if (diff > 96)
+        {
+            int wholeNoteCount = (diff - 1) / 96;
+            diff -= 96 * wholeNoteCount;
+
+            for (int i = 0; i < wholeNoteCount; i++)
+            {
+                time += 96;
+                Event timeSplitEvent = {};
+                timeSplitEvent.time = time;
+                timeSplitEvent.type = EventType::TimeSplit;
+                outEvents->push_back(timeSplitEvent);
+            }
+        }
+
+        std::int32_t lutValue = g_noteDurationLUT[diff];
+
+        if (lutValue != diff)
+        {
+            Event timeSplitEvent = {};
+            timeSplitEvent.time = time + lutValue;
+            timeSplitEvent.type = EventType::TimeSplit;
+            outEvents->push_back(timeSplitEvent);
+        }
+
+        time = event.time;
+
+        outEvents->push_back(event);
+    }
+
+    return outEvents;
+}
+
+std::unique_ptr<std::vector<Event>> CreateTies(std::vector<Event>& inEvents)
+{
+    std::unique_ptr<std::vector<Event>> outEvents(new std::vector<Event>());
+
+    for (const Event& event : inEvents)
+    {
+        if (event.type == EventType::Note && event.param2 > 96)
+        {
+            Event tieEvent = event;
+            tieEvent.param2 = -1;
+            outEvents->push_back(tieEvent);
+
+            Event eotEvent = {};
+            eotEvent.time = event.time + event.param2;
+            eotEvent.type = EventType::EndOfTie;
+            eotEvent.note = event.note;
+            outEvents->push_back(eotEvent);
+        }
+        else
+        {
+            outEvents->push_back(event);
+        }
+    }
+
+    return outEvents;
+}
+
+void CalculateWaits(std::vector<Event>& events)
+{
+    g_initialWait = events[0].time;
+    int wholeNoteCount = 0;
+
+    for (unsigned i = 0; i < events.size() && events[i].type != EventType::EndOfTrack; i++)
+    {
+        events[i].time = events[i + 1].time - events[i].time;
+
+        if (events[i].type == EventType::TimeSignature)
+        {
+            events[i].type = EventType::WholeNoteMark;
+            events[i].param2 = wholeNoteCount++;
+        }
+    }
+}
+
+int CalculateCompressionScore(std::vector<Event>& events, int index)
+{
+    int score = 0;
+    std::uint8_t lastParam1 = events[index].param1;
+    std::uint8_t lastVelocity = 0x80u;
+    EventType lastType = events[index].type;
+    std::int32_t lastDuration = 0x80000000;
+    std::uint8_t lastNote = 0x80u;
+
+    if (events[index].time > 0)
+        score++;
+
+    for (int i = index + 1; !IsPatternBoundary(events[i].type); i++)
+    {
+        if (events[i].type == EventType::Note)
+        {
+            int val = 0;
+
+            if (events[i].note != lastNote)
+            {
+                val++;
+                lastNote = events[i].note;
+            }
+
+            if (events[i].param1 != lastVelocity)
+            {
+                val++;
+                lastVelocity = events[i].param1;
+            }
+
+            std::int32_t duration = events[i].param2;
+
+            if (g_noteDurationLUT[duration] != lastDuration)
+            {
+                val++;
+                lastDuration = g_noteDurationLUT[duration];
+            }
+
+            if (duration != lastDuration)
+                val++;
+
+            if (val == 0)
+                val = 1;
+
+            score += val;
+        }
+        else
+        {
+            lastDuration = 0x80000000;
+
+            if (events[i].type == lastType)
+            {
+                if ((lastType != EventType::Controller && (int)lastType != 0x25 && lastType != EventType::EndOfTie) || events[i].param1 == lastParam1)
+                {
+                    score++;
+                }
+                else
+                {
+                    score += 2;
+                }
+            }
+            else
+            {
+                score += 2;
+            }
+        }
+
+        lastParam1 = events[i].param1;
+        lastType = events[i].type;
+
+        if (events[i].time)
+            ++score;
+    }
+
+    return score;
+}
+
+bool IsCompressionMatch(std::vector<Event>& events, int index1, int index2)
+{
+    index1++;
+    index2++;
+
+    do
+    {
+        if (events[index1] != events[index2])
+            return false;
+
+        index1++;
+        index2++;
+    } while (!IsPatternBoundary(events[index1].type));
+
+    return IsPatternBoundary(events[index2].type);
+}
+
+void CompressWholeNote(std::vector<Event>& events, int index)
+{
+    for (int j = index + 1; events[j].type != EventType::EndOfTrack; j++)
+    {
+        while (events[j].type != EventType::WholeNoteMark)
+        {
+            j++;
+
+            if (events[j].type == EventType::EndOfTrack)
+                return;
+        }
+
+        if (IsCompressionMatch(events, index, j))
+        {
+            events[j].type = EventType::Pattern;
+            events[j].param2 = events[index].param2 & 0x7FFFFFFF;
+            events[index].param2 |= 0x80000000;
+        }
+    }
+}
+
+void Compress(std::vector<Event>& events)
+{
+    for (int i = 0; events[i].type != EventType::EndOfTrack; i++)
+    {
+        while (events[i].type != EventType::WholeNoteMark)
+        {
+            i++;
+
+            if (events[i].type == EventType::EndOfTrack)
+                return;
+        }
+
+        if (CalculateCompressionScore(events, i) >= 6)
+        {
+            CompressWholeNote(events, i);
+        }
+    }
+}
+
+void ReadMidiTracks()
+{
+    long trackHeaderStart = 14;
+
+    ReadMidiTrackHeader(trackHeaderStart);
+    ReadSeqEvents();
+
+    g_agbTrack = 1;
+
+    for (int midiTrack = 0; midiTrack < g_midiTrackCount; midiTrack++)
+    {
+        trackHeaderStart += ReadMidiTrackHeader(trackHeaderStart);
+
+        for (g_midiChan = 0; g_midiChan < 16; g_midiChan++)
+        {
+            ReadTrackEvents();
+
+            if (s_minNote != 0xFF)
+            {
+#ifdef DEBUG
+                printf("Track%d = Midi-Ch.%d\n", g_agbTrack, g_midiChan + 1);
+#endif
+
+                std::unique_ptr<std::vector<Event>> events(MergeEvents());
+
+                // We don't need TEMPO in anything but track 1.
+                if (g_agbTrack == 1)
+                {
+                    auto it = std::remove_if(s_seqEvents.begin(), s_seqEvents.end(), [](const Event& event) { return event.type == EventType::Tempo; });
+                    s_seqEvents.erase(it, s_seqEvents.end());
+                }
+
+                ConvertTimes(*events);
+                events = InsertTimingEvents(*events);
+                events = CreateTies(*events);
+                std::stable_sort(events->begin(), events->end(), EventCompare);
+                events = SplitTime(*events);
+                CalculateWaits(*events);
+
+                if (g_compressionEnabled)
+                    Compress(*events);
+
+                PrintAgbTrack(*events);
+
+                g_agbTrack++;
+            }
+        }
+    }
+}
diff --git a/tools/mid2agb/midi.h b/tools/mid2agb/midi.h
new file mode 100644
index 000000000..434c8e8e8
--- /dev/null
+++ b/tools/mid2agb/midi.h
@@ -0,0 +1,87 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef MIDI_H
+#define MIDI_H
+
+#include <cstdint>
+
+enum class MidiFormat
+{
+    SingleTrack,
+    MultiTrack
+};
+
+enum class EventType
+{
+    EndOfTie = 0x01,
+    Label = 0x11,
+    LoopEnd = 0x12,
+    LoopEndBegin = 0x13,
+    LoopBegin = 0x14,
+    OriginalTimeSignature = 0x15,
+    WholeNoteMark = 0x16,
+    Pattern = 0x17,
+    TimeSignature = 0x18,
+    Tempo = 0x19,
+    InstrumentChange = 0x21,
+    Controller = 0x22,
+    PitchBend = 0x23,
+    KeyShift = 0x31,
+    Note = 0x40,
+    TimeSplit = 0xFE,
+    EndOfTrack = 0xFF,
+};
+
+struct Event
+{
+    std::int32_t time;
+    EventType type;
+    std::uint8_t note;
+    std::uint8_t param1;
+    std::int32_t param2;
+
+    bool operator==(const Event& other)
+    {
+        return (time == other.time
+            && type == other.type
+            && note == other.note
+            && param1 == other.param1
+            && param2 == other.param2);
+    }
+
+    bool operator!=(const Event& other)
+    {
+        return !(*this == other);
+    }
+};
+
+void ReadMidiFileHeader();
+void ReadMidiTracks();
+
+extern int g_midiChan;
+extern std::int32_t g_initialWait;
+
+inline bool IsPatternBoundary(EventType type)
+{
+    return type == EventType::EndOfTrack || (int)type <= 0x17;
+}
+
+#endif // MIDI_H
diff --git a/tools/mid2agb/tables.cpp b/tools/mid2agb/tables.cpp
new file mode 100644
index 000000000..f254664a4
--- /dev/null
+++ b/tools/mid2agb/tables.cpp
@@ -0,0 +1,286 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include "tables.h"
+
+const int g_noteDurationLUT[] =
+{
+    0, // 0
+    1, // 1
+    2, // 2
+    3, // 3
+    4, // 4
+    5, // 5
+    6, // 6
+    7, // 7
+    8, // 8
+    9, // 9
+    10, // 10
+    11, // 11
+    12, // 12
+    13, // 13
+    14, // 14
+    15, // 15
+    16, // 16
+    17, // 17
+    18, // 18
+    19, // 19
+    20, // 20
+    21, // 21
+    22, // 22
+    23, // 23
+    24, // 24
+    24, // 25
+    24, // 26
+    24, // 27
+    28, // 28
+    28, // 29
+    30, // 30
+    30, // 31
+    32, // 32
+    32, // 33
+    32, // 34
+    32, // 35
+    36, // 36
+    36, // 37
+    36, // 38
+    36, // 39
+    40, // 40
+    40, // 41
+    42, // 42
+    42, // 43
+    44, // 44
+    44, // 45
+    44, // 46
+    44, // 47
+    48, // 48
+    48, // 49
+    48, // 50
+    48, // 51
+    52, // 52
+    52, // 53
+    54, // 54
+    54, // 55
+    56, // 56
+    56, // 57
+    56, // 58
+    56, // 59
+    60, // 60
+    60, // 61
+    60, // 62
+    60, // 63
+    64, // 64
+    64, // 65
+    66, // 66
+    66, // 67
+    68, // 68
+    68, // 69
+    68, // 70
+    68, // 71
+    72, // 72
+    72, // 73
+    72, // 74
+    72, // 75
+    76, // 76
+    76, // 77
+    78, // 78
+    78, // 79
+    80, // 80
+    80, // 81
+    80, // 82
+    80, // 83
+    84, // 84
+    84, // 85
+    84, // 86
+    84, // 87
+    88, // 88
+    88, // 89
+    90, // 90
+    90, // 91
+    92, // 92
+    92, // 93
+    92, // 94
+    92, // 95
+    96, // 96
+};
+
+const int g_noteVelocityLUT[] =
+{
+    0, // 0
+    4, // 1
+    4, // 2
+    4, // 3
+    4, // 4
+    8, // 5
+    8, // 6
+    8, // 7
+    8, // 8
+    12, // 9
+    12, // 10
+    12, // 11
+    12, // 12
+    16, // 13
+    16, // 14
+    16, // 15
+    16, // 16
+    20, // 17
+    20, // 18
+    20, // 19
+    20, // 20
+    24, // 21
+    24, // 22
+    24, // 23
+    24, // 24
+    28, // 25
+    28, // 26
+    28, // 27
+    28, // 28
+    32, // 29
+    32, // 30
+    32, // 31
+    32, // 32
+    36, // 33
+    36, // 34
+    36, // 35
+    36, // 36
+    40, // 37
+    40, // 38
+    40, // 39
+    40, // 40
+    44, // 41
+    44, // 42
+    44, // 43
+    44, // 44
+    48, // 45
+    48, // 46
+    48, // 47
+    48, // 48
+    52, // 49
+    52, // 50
+    52, // 51
+    52, // 52
+    56, // 53
+    56, // 54
+    56, // 55
+    56, // 56
+    60, // 57
+    60, // 58
+    60, // 59
+    60, // 60
+    64, // 61
+    64, // 62
+    64, // 63
+    64, // 64
+    68, // 65
+    68, // 66
+    68, // 67
+    68, // 68
+    72, // 69
+    72, // 70
+    72, // 71
+    72, // 72
+    76, // 73
+    76, // 74
+    76, // 75
+    76, // 76
+    80, // 77
+    80, // 78
+    80, // 79
+    80, // 80
+    84, // 81
+    84, // 82
+    84, // 83
+    84, // 84
+    88, // 85
+    88, // 86
+    88, // 87
+    88, // 88
+    92, // 89
+    92, // 90
+    92, // 91
+    92, // 92
+    96, // 93
+    96, // 94
+    96, // 95
+    96, // 96
+    100, // 97
+    100, // 98
+    100, // 99
+    100, // 100
+    104, // 101
+    104, // 102
+    104, // 103
+    104, // 104
+    108, // 105
+    108, // 106
+    108, // 107
+    108, // 108
+    112, // 109
+    112, // 110
+    112, // 111
+    112, // 112
+    116, // 113
+    116, // 114
+    116, // 115
+    116, // 116
+    120, // 117
+    120, // 118
+    120, // 119
+    120, // 120
+    124, // 121
+    124, // 122
+    124, // 123
+    124, // 124
+    127, // 125
+    127, // 126
+    127, // 127
+};
+
+const char* g_noteTable[] =
+{
+    "Cn%01u ",
+    "Cs%01u ",
+    "Dn%01u ",
+    "Ds%01u ",
+    "En%01u ",
+    "Fn%01u ",
+    "Fs%01u ",
+    "Gn%01u ",
+    "Gs%01u ",
+    "An%01u ",
+    "As%01u ",
+    "Bn%01u ",
+};
+
+const char* g_minusNoteTable[] =
+{
+    "CnM%01u",
+    "CsM%01u",
+    "DnM%01u",
+    "DsM%01u",
+    "EnM%01u",
+    "FnM%01u",
+    "FsM%01u",
+    "GnM%01u",
+    "GsM%01u",
+    "AnM%01u",
+    "AsM%01u",
+    "BnM%01u",
+};
diff --git a/tools/mid2agb/tables.h b/tools/mid2agb/tables.h
new file mode 100644
index 000000000..da3c9072d
--- /dev/null
+++ b/tools/mid2agb/tables.h
@@ -0,0 +1,29 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef TABLES_H
+#define TABLES_H
+
+extern const int g_noteDurationLUT[];
+extern const int g_noteVelocityLUT[];
+extern const char* g_noteTable[];
+extern const char* g_minusNoteTable[];
+
+#endif // TABLES_H
diff --git a/tools/preproc/.gitignore b/tools/preproc/.gitignore
new file mode 100644
index 000000000..eb3470879
--- /dev/null
+++ b/tools/preproc/.gitignore
@@ -0,0 +1 @@
+preproc
diff --git a/tools/preproc/LICENSE b/tools/preproc/LICENSE
new file mode 100644
index 000000000..534d15349
--- /dev/null
+++ b/tools/preproc/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/preproc/Makefile b/tools/preproc/Makefile
new file mode 100644
index 000000000..ec4a5f365
--- /dev/null
+++ b/tools/preproc/Makefile
@@ -0,0 +1,17 @@
+CXX := g++
+
+CXXFLAGS := -std=c++11 -O2 -s -Wall -Wno-switch -Werror
+
+SRCS := asm_file.cpp c_file.cpp charmap.cpp preproc.cpp string_parser.cpp \
+	utf8.cpp
+
+HEADERS := asm_file.h c_file.h char_util.h charmap.h preproc.h string_parser.h \
+	utf8.h
+
+.PHONY: clean
+
+preproc: $(SRCS) $(HEADERS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) preproc preproc.exe
diff --git a/tools/preproc/asm_file.cpp b/tools/preproc/asm_file.cpp
new file mode 100644
index 000000000..bb296b78b
--- /dev/null
+++ b/tools/preproc/asm_file.cpp
@@ -0,0 +1,529 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdarg>
+#include "preproc.h"
+#include "asm_file.h"
+#include "char_util.h"
+#include "utf8.h"
+#include "string_parser.h"
+
+AsmFile::AsmFile(std::string filename) : m_filename(filename)
+{
+    FILE *fp = std::fopen(filename.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    if (m_size < 0)
+        FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str());
+
+    m_buffer = new char[m_size + 1];
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str());
+
+    m_buffer[m_size] = 0;
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+    m_lineStart = 0;
+
+    RemoveComments();
+}
+
+AsmFile::AsmFile(AsmFile&& other) : m_filename(std::move(other.m_filename))
+{
+    m_buffer = other.m_buffer;
+    m_pos = other.m_pos;
+    m_size = other.m_size;
+    m_lineNum = other.m_lineNum;
+    m_lineStart = other.m_lineStart;
+
+    other.m_buffer = nullptr;
+}
+
+AsmFile::~AsmFile()
+{
+    delete[] m_buffer;
+}
+
+// Removes comments to simplify further processing.
+// It stops upon encountering a null character,
+// which may or may not be the end of file marker.
+// If it's not, the error will be caught later.
+void AsmFile::RemoveComments()
+{
+    long pos = 0;
+    char stringChar = 0;
+
+    for (;;)
+    {
+        if (m_buffer[pos] == 0)
+            return;
+
+        if (stringChar != 0)
+        {
+            if (m_buffer[pos] == '\\' && m_buffer[pos + 1] == stringChar)
+            {
+                pos += 2;
+            }
+            else
+            {
+                if (m_buffer[pos] == stringChar)
+                    stringChar = 0;
+                pos++;
+            }
+        }
+        else if (m_buffer[pos] == '@' && (pos == 0 || m_buffer[pos - 1] != '\\'))
+        {
+            while (m_buffer[pos] != '\n' && m_buffer[pos] != 0)
+                m_buffer[pos++] = ' ';
+        }
+        else if (m_buffer[pos] == '/' && m_buffer[pos + 1] == '*')
+        {
+            m_buffer[pos++] = ' ';
+            m_buffer[pos++] = ' ';
+
+            for (;;)
+            {
+                if (m_buffer[pos] == 0)
+                    return;
+
+                if (m_buffer[pos] == '*' && m_buffer[pos + 1] == '/')
+                {
+                    m_buffer[pos++] = ' ';
+                    m_buffer[pos++] = ' ';
+                    break;
+                }
+                else
+                {
+                    if (m_buffer[pos] != '\n')
+                        m_buffer[pos] = ' ';
+                    pos++;
+                }
+            }
+        }
+        else
+        {
+            if (m_buffer[pos] == '"' || m_buffer[pos] == '\'')
+                stringChar = m_buffer[pos];
+            pos++;
+        }
+    }
+}
+
+// Checks if we're at a particular directive and if so, consumes it.
+// Returns whether the directive was found.
+bool AsmFile::CheckForDirective(std::string name)
+{
+    long i;
+    long length = static_cast<long>(name.length());
+
+    for (i = 0; i < length && m_pos + i < m_size; i++)
+        if (name[i] != m_buffer[m_pos + i])
+            return false;
+
+    if (i < length)
+        return false;
+
+    m_pos += length;
+
+    return true;
+}
+
+// Checks if we're at a known directive and if so, consumes it.
+// Returns which directive was found.
+Directive AsmFile::GetDirective()
+{
+    SkipWhitespace();
+
+    if (CheckForDirective(".include"))
+        return Directive::Include;
+    else if (CheckForDirective(".string"))
+        return Directive::String;
+    else if (CheckForDirective(".braille"))
+        return Directive::Braille;
+    else
+        return Directive::Unknown;
+}
+
+// Checks if we're at label that ends with '::'.
+// Returns the name if so and an empty string if not.
+std::string AsmFile::GetGlobalLabel()
+{
+    long start = m_pos;
+    long pos = m_pos;
+
+    if (IsIdentifierStartingChar(m_buffer[pos]))
+    {
+        pos++;
+
+        while (IsIdentifierChar(m_buffer[pos]))
+            pos++;
+    }
+
+    if (m_buffer[pos] == ':' && m_buffer[pos + 1] == ':')
+    {
+        m_pos = pos + 2;
+        ExpectEmptyRestOfLine();
+        return std::string(&m_buffer[start], pos - start);
+    }
+
+    return std::string();
+}
+
+// Skips tabs and spaces.
+void AsmFile::SkipWhitespace()
+{
+    while (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+        m_pos++;
+}
+
+// Reads include path.
+std::string AsmFile::ReadPath()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '"')
+        RaiseError("expected file path");
+
+    m_pos++;
+
+    int length = 0;
+    long startPos = m_pos;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        unsigned char c = m_buffer[m_pos++];
+
+        if (c == 0)
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF in include string");
+            else
+                RaiseError("unexpected null character in include string");
+        }
+
+        if (!IsAsciiPrintable(c))
+            RaiseError("unexpected character '\\x%02X' in include string", c);
+
+        // Don't bother allowing any escape sequences.
+        if (c == '\\')
+        {
+            c = m_buffer[m_pos];
+            RaiseError("unexpected escape '\\%c' in include string", c);
+        }
+
+        length++;
+
+        if (length > kMaxPath)
+            RaiseError("path is too long");
+    }
+
+    m_pos++; // Go past the right quote.
+
+    ExpectEmptyRestOfLine();
+
+    return std::string(&m_buffer[startPos], length);
+}
+
+// Reads a charmap string.
+int AsmFile::ReadString(unsigned char* s)
+{
+    SkipWhitespace();
+
+    int length;
+    StringParser stringParser(m_buffer, m_size);
+
+    try
+    {
+        m_pos += stringParser.ParseString(m_pos, s, length);
+    }
+    catch (std::runtime_error e)
+    {
+        RaiseError(e.what());
+    }
+
+    SkipWhitespace();
+
+    if (ConsumeComma())
+    {
+        SkipWhitespace();
+        int padLength = ReadPadLength();
+
+        while (length < padLength)
+        {
+            s[length++] = 0;
+        }
+    }
+
+    ExpectEmptyRestOfLine();
+
+    return length;
+}
+
+int AsmFile::ReadBraille(unsigned char* s)
+{
+    static std::map<char, unsigned char> encoding =
+    {
+        { 'A', 0x01 },
+        { 'B', 0x05 },
+        { 'C', 0x03 },
+        { 'D', 0x0B },
+        { 'E', 0x09 },
+        { 'F', 0x07 },
+        { 'G', 0x0F },
+        { 'H', 0x0D },
+        { 'I', 0x06 },
+        { 'J', 0x0E },
+        { 'K', 0x11 },
+        { 'L', 0x15 },
+        { 'M', 0x13 },
+        { 'N', 0x1B },
+        { 'O', 0x19 },
+        { 'P', 0x17 },
+        { 'Q', 0x1F },
+        { 'R', 0x1D },
+        { 'S', 0x16 },
+        { 'T', 0x1E },
+        { 'U', 0x31 },
+        { 'V', 0x35 },
+        { 'W', 0x2E },
+        { 'X', 0x33 },
+        { 'Y', 0x3B },
+        { 'Z', 0x39 },
+        { ' ', 0x00 },
+        { ',', 0x04 },
+        { '.', 0x2C },
+        { '$', 0xFF },
+    };
+
+    SkipWhitespace();
+
+    int length = 0;
+
+    if (m_buffer[m_pos] != '"')
+        RaiseError("expected braille string literal");
+
+    m_pos++;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        if (length == kMaxStringLength)
+            RaiseError("mapped string longer than %d bytes", kMaxStringLength);
+
+        if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == 'n')
+        {
+            s[length++] = 0xFE;
+            m_pos += 2;
+        }
+        else
+        {
+            char c = m_buffer[m_pos];
+
+            if (encoding.count(c) == 0)
+            {
+                if (IsAsciiPrintable(c))
+                    RaiseError("character '%c' not valid in braille string", m_buffer[m_pos]);
+                else
+                    RaiseError("character '\\x%02X' not valid in braille string", m_buffer[m_pos]);
+            }
+
+            s[length++] = encoding[c];
+            m_pos++;
+        }
+    }
+
+    m_pos++; // Go past the right quote.
+
+    ExpectEmptyRestOfLine();
+
+    return length;
+}
+
+// If we're at a comma, consumes it.
+// Returns whether a comma was found.
+bool AsmFile::ConsumeComma()
+{
+    if (m_buffer[m_pos] == ',')
+    {
+        m_pos++;
+        return true;
+    }
+
+    return false;
+}
+
+// Converts digit character to numerical value.
+static int ConvertDigit(char c, int radix)
+{
+    int digit;
+
+    if (c >= '0' && c <= '9')
+        digit = c - '0';
+    else if (c >= 'A' && c <= 'F')
+        digit = 10 + c - 'A';
+    else if (c >= 'a' && c <= 'f')
+        digit = 10 + c - 'a';
+    else
+        return -1;
+
+    return (digit < radix) ? digit : -1;
+}
+
+// Reads an integer. If the integer is greater than maxValue, it returns -1.
+int AsmFile::ReadPadLength()
+{
+    if (!IsAsciiDigit(m_buffer[m_pos]))
+        RaiseError("expected integer");
+
+    int radix = 10;
+
+    if (m_buffer[m_pos] == '0' && m_buffer[m_pos + 1] == 'x')
+    {
+        radix = 16;
+        m_pos += 2;
+    }
+
+    unsigned n = 0;
+    int digit;
+
+    while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
+    {
+        n = n * radix + digit;
+
+        if (n > kMaxStringLength)
+            RaiseError("pad length greater than maximum length (%d)", kMaxStringLength);
+
+        m_pos++;
+    }
+
+    return n;
+}
+
+// Outputs the current line and moves to the next one.
+void AsmFile::OutputLine()
+{
+    while (m_buffer[m_pos] != '\n' && m_buffer[m_pos] != 0)
+        m_pos++;
+
+    if (m_buffer[m_pos] == 0)
+    {
+        if (m_pos >= m_size)
+        {
+            RaiseWarning("file doesn't end with newline");
+            puts(&m_buffer[m_lineStart]);
+        }
+        else
+        {
+            RaiseError("unexpected null character");
+        }
+    }
+    else
+    {
+        m_buffer[m_pos] = 0;
+        puts(&m_buffer[m_lineStart]);
+        m_buffer[m_pos] = '\n';
+        m_pos++;
+        m_lineStart = m_pos;
+        m_lineNum++;
+    }
+}
+
+// Asserts that the rest of the line is empty and moves to the next one.
+void AsmFile::ExpectEmptyRestOfLine()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] == 0)
+    {
+        if (m_pos >= m_size)
+            RaiseWarning("file doesn't end with newline");
+        else
+            RaiseError("unexpected null character");
+    }
+    else if (m_buffer[m_pos] == '\n')
+    {
+        m_pos++;
+        m_lineStart = m_pos;
+        m_lineNum++;
+    }
+    else if (m_buffer[m_pos] == '\r')
+    {
+        RaiseError("only Unix-style LF newlines are supported");
+    }
+    else
+    {
+        RaiseError("junk at end of line");
+    }
+}
+
+// Checks if we're at the end of the file.
+bool AsmFile::IsAtEnd()
+{
+    return (m_pos >= m_size);
+}
+
+// Output the current location to set gas's logical file and line numbers.
+void AsmFile::OutputLocation()
+{
+    std::printf("# %ld \"%s\"\n", m_lineNum, m_filename.c_str());
+}
+
+// Reports a diagnostic message.
+void AsmFile::ReportDiagnostic(const char* type, const char* format, std::va_list args)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+    std::vsnprintf(buffer, bufferSize, format, args);
+    std::fprintf(stderr, "%s:%ld: %s: %s\n", m_filename.c_str(), m_lineNum, type, buffer);
+}
+
+#define DO_REPORT(type)                   \
+do                                        \
+{                                         \
+    std::va_list args;                    \
+    va_start(args, format);               \
+    ReportDiagnostic(type, format, args); \
+    va_end(args);                         \
+} while (0)
+
+// Reports an error diagnostic and terminates the program.
+void AsmFile::RaiseError(const char* format, ...)
+{
+    DO_REPORT("error");
+    std::exit(1);
+}
+
+// Reports a warning diagnostic.
+void AsmFile::RaiseWarning(const char* format, ...)
+{
+    DO_REPORT("warning");
+}
diff --git a/tools/preproc/asm_file.h b/tools/preproc/asm_file.h
new file mode 100644
index 000000000..d73b36e90
--- /dev/null
+++ b/tools/preproc/asm_file.h
@@ -0,0 +1,72 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef ASM_FILE_H
+#define ASM_FILE_H
+
+#include <cstdarg>
+#include <cstdint>
+#include <string>
+#include "preproc.h"
+
+enum class Directive
+{
+    Include,
+    String,
+    Braille,
+    Unknown
+};
+
+class AsmFile
+{
+public:
+    AsmFile(std::string filename);
+    AsmFile(AsmFile&& other);
+    AsmFile(const AsmFile&) = delete;
+    ~AsmFile();
+    Directive GetDirective();
+    std::string GetGlobalLabel();
+    std::string ReadPath();
+    int ReadString(unsigned char* s);
+    int ReadBraille(unsigned char* s);
+    bool IsAtEnd();
+    void OutputLine();
+    void OutputLocation();
+
+private:
+    char* m_buffer;
+    long m_pos;
+    long m_size;
+    long m_lineNum;
+    long m_lineStart;
+    std::string m_filename;
+
+    bool ConsumeComma();
+    int ReadPadLength();
+    void RemoveComments();
+    bool CheckForDirective(std::string name);
+    void SkipWhitespace();
+    void ExpectEmptyRestOfLine();
+    void ReportDiagnostic(const char* type, const char* format, std::va_list args);
+    void RaiseError(const char* format, ...);
+    void RaiseWarning(const char* format, ...);
+};
+
+#endif // ASM_FILE_H
diff --git a/tools/preproc/c_file.cpp b/tools/preproc/c_file.cpp
new file mode 100644
index 000000000..24b3453e8
--- /dev/null
+++ b/tools/preproc/c_file.cpp
@@ -0,0 +1,421 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdarg>
+#include <string>
+#include <memory>
+#include "preproc.h"
+#include "c_file.h"
+#include "char_util.h"
+#include "utf8.h"
+#include "string_parser.h"
+
+CFile::CFile(std::string filename) : m_filename(filename)
+{
+    FILE *fp = std::fopen(filename.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    if (m_size < 0)
+        FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str());
+
+    m_buffer = new char[m_size + 1];
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str());
+
+    m_buffer[m_size] = 0;
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+}
+
+CFile::CFile(CFile&& other) : m_filename(std::move(other.m_filename))
+{
+    m_buffer = other.m_buffer;
+    m_pos = other.m_pos;
+    m_size = other.m_size;
+    m_lineNum = other.m_lineNum;
+
+    other.m_buffer = nullptr;
+}
+
+CFile::~CFile()
+{
+    delete[] m_buffer;
+}
+
+void CFile::Preproc()
+{
+    char stringChar = 0;
+
+    while (m_pos < m_size)
+    {
+        if (stringChar)
+        {
+            if (m_buffer[m_pos] == stringChar)
+            {
+                std::putchar(stringChar);
+                m_pos++;
+                stringChar = 0;
+            }
+            else if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == stringChar)
+            {
+                std::putchar('\\');
+                std::putchar(stringChar);
+                m_pos += 2;
+            }
+            else
+            {
+                if (m_buffer[m_pos] == '\n')
+                    m_lineNum++;
+                std::putchar(m_buffer[m_pos]);
+                m_pos++;
+            }
+        }
+        else
+        {
+            TryConvertString();
+            TryConvertIncbin();
+
+            if (m_pos >= m_size)
+                break;
+
+            char c = m_buffer[m_pos++];
+
+            std::putchar(c);
+
+            if (c == '\n')
+                m_lineNum++;
+            else if (c == '"')
+                stringChar = '"';
+            else if (c == '\'')
+                stringChar = '\'';
+        }
+    }
+}
+
+bool CFile::ConsumeHorizontalWhitespace()
+{
+    if (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+    {
+        m_pos++;
+        return true;
+    }
+
+    return false;
+}
+
+bool CFile::ConsumeNewline()
+{
+    if (m_buffer[m_pos] == '\r' && m_buffer[m_pos + 1] == '\n')
+    {
+        m_pos += 2;
+        m_lineNum++;
+        std::putchar('\n');
+        return true;
+    }
+
+    if (m_buffer[m_pos] == '\n')
+    {
+        m_pos++;
+        m_lineNum++;
+        std::putchar('\n');
+        return true;
+    }
+
+    return false;
+}
+
+void CFile::SkipWhitespace()
+{
+    while (ConsumeHorizontalWhitespace() || ConsumeNewline())
+        ;
+}
+
+void CFile::TryConvertString()
+{
+    long oldPos = m_pos;
+    long oldLineNum = m_lineNum;
+    bool noTerminator = false;
+
+    if (m_buffer[m_pos] != '_' || (m_pos > 0 && IsIdentifierChar(m_buffer[m_pos - 1])))
+        return;
+
+    m_pos++;
+
+    if (m_buffer[m_pos] == '_')
+    {
+        noTerminator = true;
+        m_pos++;
+    }
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '(')
+    {
+        m_pos = oldPos;
+        m_lineNum = oldLineNum;
+        return;
+    }
+
+    m_pos++;
+
+    SkipWhitespace();
+
+    std::printf("{ ");
+
+    while (1)
+    {
+        SkipWhitespace();
+
+        if (m_buffer[m_pos] == '"')
+        {
+            unsigned char s[kMaxStringLength];
+            int length;
+            StringParser stringParser(m_buffer, m_size);
+
+            try
+            {
+                m_pos += stringParser.ParseString(m_pos, s, length);
+            }
+            catch (std::runtime_error e)
+            {
+                RaiseError(e.what());
+            }
+
+            for (int i = 0; i < length; i++)
+                printf("0x%02X, ", s[i]);
+        }
+        else if (m_buffer[m_pos] == ')')
+        {
+            m_pos++;
+            break;
+        }
+        else
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF");
+            if (IsAsciiPrintable(m_buffer[m_pos]))
+                RaiseError("unexpected character '%c'", m_buffer[m_pos]);
+            else
+                RaiseError("unexpected character '\\x%02X'", m_buffer[m_pos]);
+        }
+    }
+
+    if (noTerminator)
+        std::printf(" }");
+    else
+        std::printf("0xFF }");
+}
+
+bool CFile::CheckIdentifier(const std::string& ident)
+{
+    unsigned int i;
+
+    for (i = 0; i < ident.length() && m_pos + i < (unsigned)m_size; i++)
+        if (ident[i] != m_buffer[m_pos + i])
+            return false;
+
+    return (i == ident.length());
+}
+
+std::unique_ptr<unsigned char[]> CFile::ReadWholeFile(const std::string& path, int& size)
+{
+    FILE* fp = std::fopen(path.c_str(), "rb");
+
+    if (fp == nullptr)
+        RaiseError("Failed to open \"%s\" for reading.\n", path.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    size = std::ftell(fp);
+
+    std::unique_ptr<unsigned char[]> buffer = std::unique_ptr<unsigned char[]>(new unsigned char[size]);
+
+    std::rewind(fp);
+
+    if (std::fread(buffer.get(), size, 1, fp) != 1)
+        RaiseError("Failed to read \"%s\".\n", path.c_str());
+
+    std::fclose(fp);
+
+    return buffer;
+}
+
+int ExtractData(const std::unique_ptr<unsigned char[]>& buffer, int offset, int size)
+{
+    switch (size)
+    {
+    case 1:
+        return buffer[offset];
+    case 2:
+        return (buffer[offset + 1] << 8)
+            | buffer[offset];
+    case 4:
+        return (buffer[offset + 3] << 24)
+            | (buffer[offset + 2] << 16)
+            | (buffer[offset + 1] << 8)
+            | buffer[offset];
+    default:
+        FATAL_ERROR("Invalid size passed to ExtractData.\n");
+    }
+}
+
+void CFile::TryConvertIncbin()
+{
+    std::string idents[6] = { "INCBIN_S8", "INCBIN_U8", "INCBIN_S16", "INCBIN_U16", "INCBIN_S32", "INCBIN_U32" };
+    int incbinType = -1;
+
+    for (int i = 0; i < 6; i++)
+    {
+        if (CheckIdentifier(idents[i]))
+        {
+            incbinType = i;
+            break;
+        }
+    }
+
+    if (incbinType == -1)
+        return;
+
+    int size = 1 << (incbinType / 2);
+    bool isSigned = ((incbinType % 2) == 0);
+
+    long oldPos = m_pos;
+    long oldLineNum = m_lineNum;
+
+    m_pos += idents[incbinType].length();
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '(')
+    {
+        m_pos = oldPos;
+        m_lineNum = oldLineNum;
+        return;
+    }
+
+    m_pos++;
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '"')
+        RaiseError("expected double quote");
+
+    m_pos++;
+
+    int startPos = m_pos;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        if (m_buffer[m_pos] == 0)
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF in path string");
+            else
+                RaiseError("unexpected null character in path string");
+        }
+
+        if (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n')
+            RaiseError("unexpected end of line character in path string");
+
+        if (m_buffer[m_pos] == '\\')
+            RaiseError("unexpected escape in path string");
+        
+        m_pos++;
+    }
+
+    std::string path(&m_buffer[startPos], m_pos - startPos);
+
+    m_pos++;
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != ')')
+        RaiseError("expected ')'");
+
+    m_pos++;
+
+    std::printf("{");
+
+    int fileSize;
+    std::unique_ptr<unsigned char[]> buffer = ReadWholeFile(path, fileSize);
+
+    if ((fileSize % size) != 0)
+        RaiseError("Size %d doesn't evenly divide file size %d.\n", size, fileSize);
+
+    int count = fileSize / size;
+    int offset = 0;
+
+    for (int i = 0; i < count; i++)
+    {
+        int data = ExtractData(buffer, offset, size);
+        offset += size;
+
+        if (isSigned)
+            std::printf("%d,", data);
+        else
+            std::printf("%uu,", data);
+    }
+
+    std::printf("}");
+}
+
+// Reports a diagnostic message.
+void CFile::ReportDiagnostic(const char* type, const char* format, std::va_list args)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+    std::vsnprintf(buffer, bufferSize, format, args);
+    std::fprintf(stderr, "%s:%ld: %s: %s\n", m_filename.c_str(), m_lineNum, type, buffer);
+}
+
+#define DO_REPORT(type)                   \
+do                                        \
+{                                         \
+    std::va_list args;                    \
+    va_start(args, format);               \
+    ReportDiagnostic(type, format, args); \
+    va_end(args);                         \
+} while (0)
+
+// Reports an error diagnostic and terminates the program.
+void CFile::RaiseError(const char* format, ...)
+{
+    DO_REPORT("error");
+    std::exit(1);
+}
+
+// Reports a warning diagnostic.
+void CFile::RaiseWarning(const char* format, ...)
+{
+    DO_REPORT("warning");
+}
diff --git a/tools/preproc/c_file.h b/tools/preproc/c_file.h
new file mode 100644
index 000000000..7369aba85
--- /dev/null
+++ b/tools/preproc/c_file.h
@@ -0,0 +1,58 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef C_FILE_H
+#define C_FILE_H
+
+#include <cstdarg>
+#include <cstdint>
+#include <string>
+#include <memory>
+#include "preproc.h"
+
+class CFile
+{
+public:
+    CFile(std::string filename);
+    CFile(CFile&& other);
+    CFile(const CFile&) = delete;
+    ~CFile();
+    void Preproc();
+
+private:
+    char* m_buffer;
+    long m_pos;
+    long m_size;
+    long m_lineNum;
+    std::string m_filename;
+
+    bool ConsumeHorizontalWhitespace();
+    bool ConsumeNewline();
+    void SkipWhitespace();
+    void TryConvertString();
+    std::unique_ptr<unsigned char[]> ReadWholeFile(const std::string& path, int& size);
+    bool CheckIdentifier(const std::string& ident);
+    void TryConvertIncbin();
+    void ReportDiagnostic(const char* type, const char* format, std::va_list args);
+    void RaiseError(const char* format, ...);
+    void RaiseWarning(const char* format, ...);
+};
+
+#endif // C_FILE_H
diff --git a/tools/preproc/char_util.h b/tools/preproc/char_util.h
new file mode 100644
index 000000000..02a6e1ceb
--- /dev/null
+++ b/tools/preproc/char_util.h
@@ -0,0 +1,71 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef CHAR_UTIL_H
+#define CHAR_UTIL_H
+
+#include <cstdint>
+#include <cassert>
+
+inline bool IsAscii(unsigned char c)
+{
+    return (c < 128);
+}
+
+inline bool IsAsciiAlpha(unsigned char c)
+{
+    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
+}
+
+inline bool IsAsciiDigit(unsigned char c)
+{
+    return (c >= '0' && c <= '9');
+}
+
+inline bool IsAsciiHexDigit(unsigned char c)
+{
+    return ((c >= '0' && c <= '9')
+        || (c >= 'a' && c <= 'f')
+        || (c >= 'A' && c <= 'F'));
+}
+
+inline bool IsAsciiAlphanum(unsigned char c)
+{
+    return (IsAsciiAlpha(c) || IsAsciiDigit(c));
+}
+
+inline bool IsAsciiPrintable(unsigned char c)
+{
+    return (c >= ' ' && c <= '~');
+}
+
+// Returns whether the character can start a C identifier or the identifier of a "{FOO}" constant in strings.
+inline bool IsIdentifierStartingChar(unsigned char c)
+{
+    return IsAsciiAlpha(c) || c == '_';
+}
+
+// Returns whether the character can be used in a C identifier or the identifier of a "{FOO}" constant in strings.
+inline bool IsIdentifierChar(unsigned char c)
+{
+    return IsAsciiAlphanum(c) || c == '_';
+}
+
+#endif // CHAR_UTIL_H
diff --git a/tools/preproc/charmap.cpp b/tools/preproc/charmap.cpp
new file mode 100644
index 000000000..a7bedfe26
--- /dev/null
+++ b/tools/preproc/charmap.cpp
@@ -0,0 +1,408 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdint>
+#include <cstdarg>
+#include "preproc.h"
+#include "charmap.h"
+#include "char_util.h"
+#include "utf8.h"
+
+enum LhsType
+{
+    Char,
+    Escape,
+    Constant,
+    None
+};
+
+struct Lhs
+{
+    LhsType type;
+    std::string name;
+    std::int32_t code;
+};
+
+class CharmapReader
+{
+public:
+    CharmapReader(std::string filename);
+    CharmapReader(const CharmapReader&) = delete;
+    ~CharmapReader();
+    Lhs ReadLhs();
+    void ExpectEqualsSign();
+    std::string ReadSequence();
+    void ExpectEmptyRestOfLine();
+    void RaiseError(const char* format, ...);
+
+private:
+    char* m_buffer;
+    long m_pos;
+    long m_size;
+    long m_lineNum;
+    std::string m_filename;
+
+    void RemoveComments();
+    std::string ReadConstant();
+    void SkipWhitespace();
+};
+
+CharmapReader::CharmapReader(std::string filename) : m_filename(filename)
+{
+    FILE *fp = std::fopen(filename.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    if (m_size < 0)
+        FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str());
+
+    m_buffer = new char[m_size + 1];
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str());
+
+    m_buffer[m_size] = 0;
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+
+    RemoveComments();
+}
+
+CharmapReader::~CharmapReader()
+{
+    delete[] m_buffer;
+}
+
+Lhs CharmapReader::ReadLhs()
+{
+    Lhs lhs;
+
+    for (;;)
+    {
+        SkipWhitespace();
+
+        if (m_buffer[m_pos] == '\n')
+        {
+            m_pos++;
+            m_lineNum++;
+        }
+        else
+        {
+            break;
+        }
+    }
+    
+    if (m_buffer[m_pos] == '\'')
+    {
+        m_pos++;
+
+        bool isEscape = (m_buffer[m_pos] == '\\');
+
+        if (isEscape)
+        {
+            m_pos++;
+        }
+
+        unsigned char c = m_buffer[m_pos];
+
+        if (c == 0)
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF in UTF-8 character literal");
+            else
+                RaiseError("unexpected null character in UTF-8 character literal");
+        }
+
+        if (IsAscii(c) && !IsAsciiPrintable(c))
+            RaiseError("unexpected character U+%X in UTF-8 character literal", c);
+
+        UnicodeChar unicodeChar = DecodeUtf8(&m_buffer[m_pos]);
+        std::int32_t code = unicodeChar.code;
+
+        if (code == -1)
+            RaiseError("invalid encoding in UTF-8 character literal");
+
+        m_pos += unicodeChar.encodingLength;
+
+        if (m_buffer[m_pos] != '\'')
+            RaiseError("unterminated character literal");
+
+        m_pos++;
+
+        lhs.code = code;
+
+        if (isEscape)
+        {
+            if (code >= 128)
+                RaiseError("escapes using non-ASCII characters are invalid");
+
+            switch (code)
+            {
+            case '\'':
+                lhs.type = LhsType::Char;
+                break;
+            case '\\':
+                lhs.type = LhsType::Char;
+            case '"':
+                RaiseError("cannot escape double quote");
+                break;
+            default:
+                lhs.type = LhsType::Escape;
+            }
+        }
+        else
+        {
+            if (code == '\'')
+                RaiseError("empty character literal");
+
+            lhs.type = LhsType::Char;
+        }
+    }
+    else if (IsIdentifierStartingChar(m_buffer[m_pos]))
+    {
+        lhs.type = LhsType::Constant;
+        lhs.name = ReadConstant();
+    }
+    else if (m_buffer[m_pos] == '\r')
+    {
+        RaiseError("only Unix-style LF newlines are supported");
+    }
+    else if (m_buffer[m_pos] == 0)
+    {
+        if (m_pos < m_size)
+            RaiseError("unexpected null character");
+        lhs.type = LhsType::None;
+    }
+    else
+    {
+        RaiseError("junk at start of line");
+    }
+
+    return lhs;
+}
+
+void CharmapReader::ExpectEqualsSign()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '=')
+        RaiseError("expected equals sign");
+
+    m_pos++;
+}
+
+static unsigned int ConvertHexDigit(char c)
+{
+    unsigned int digit = 0;
+
+    if (c >= '0' && c <= '9')
+        digit = c - '0';
+    else if (c >= 'A' && c <= 'F')
+        digit = 10 + c - 'A';
+    else if (c >= 'a' && c <= 'f')
+        digit = 10 + c - 'a';
+
+    return digit;
+}
+
+std::string CharmapReader::ReadSequence()
+{
+    SkipWhitespace();
+
+    long startPos = m_pos;
+
+    unsigned int length = 0;
+
+    while (IsAsciiHexDigit(m_buffer[m_pos]) && IsAsciiHexDigit(m_buffer[m_pos + 1]))
+    {
+        m_pos += 2;
+        length++;
+
+        if (length > kMaxCharmapSequenceLength)
+            RaiseError("byte sequence too long (max is %lu bytes)", kMaxCharmapSequenceLength);
+
+        SkipWhitespace();
+    }
+
+    if (IsAsciiHexDigit(m_buffer[m_pos]))
+        RaiseError("each byte must have 2 hex digits");
+
+    if (length == 0)
+        RaiseError("expected byte sequence");
+
+    std::string sequence;
+    sequence.reserve(length);
+
+    m_pos = startPos;
+
+    for (unsigned int i = 0; i < length; i++)
+    {
+        unsigned int digit1 = ConvertHexDigit(m_buffer[m_pos]);
+        unsigned int digit2 = ConvertHexDigit(m_buffer[m_pos + 1]);
+        unsigned char byte = digit1 * 16 + digit2;
+        sequence += byte;
+
+        m_pos += 2;
+        SkipWhitespace();
+    }
+
+    return sequence;
+}
+
+void CharmapReader::ExpectEmptyRestOfLine()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] == 0)
+    {
+        if (m_pos < m_size)
+            RaiseError("unexpected null character");
+    }
+    else if (m_buffer[m_pos] == '\n')
+    {
+        m_pos++;
+        m_lineNum++;
+    }
+    else if (m_buffer[m_pos] == '\r')
+    {
+        RaiseError("only Unix-style LF newlines are supported");
+    }
+    else
+    {
+        RaiseError("junk at end of line");
+    }
+}
+
+void CharmapReader::RaiseError(const char* format, ...)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+
+    std::va_list args;
+    va_start(args, format);
+    std::vsnprintf(buffer, bufferSize, format, args);
+    va_end(args);
+
+    std::fprintf(stderr, "%s:%ld: error: %s\n", m_filename.c_str(), m_lineNum, buffer);
+
+    std::exit(1);
+}
+
+void CharmapReader::RemoveComments()
+{
+    long pos = 0;
+    bool inString = false;
+
+    for (;;)
+    {
+        if (m_buffer[pos] == 0)
+            return;
+
+        if (inString)
+        {
+            if (m_buffer[pos] == '\\' && m_buffer[pos + 1] == '\'')
+            {
+                pos += 2;
+            }
+            else
+            {
+                if (m_buffer[pos] == '\'')
+                    inString = false;
+                pos++;
+            }
+        }
+        else if (m_buffer[pos] == '@')
+        {
+            while (m_buffer[pos] != '\n' && m_buffer[pos] != 0)
+                m_buffer[pos++] = ' ';
+        }
+        else
+        {
+            if (m_buffer[pos] == '\'')
+                inString = true;
+            pos++;
+        }
+    }
+}
+
+std::string CharmapReader::ReadConstant()
+{
+    long startPos = m_pos;
+
+    while (IsIdentifierChar(m_buffer[m_pos]))
+        m_pos++;
+
+    return std::string(&m_buffer[startPos], m_pos - startPos);
+}
+
+void CharmapReader::SkipWhitespace()
+{
+    while (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+        m_pos++;
+}
+
+Charmap::Charmap(std::string filename)
+{
+    CharmapReader reader(filename);
+
+    for (;;)
+    {
+        Lhs lhs = reader.ReadLhs();
+
+        if (lhs.type == LhsType::None)
+            return;
+
+        reader.ExpectEqualsSign();
+
+        std::string sequence = reader.ReadSequence();
+
+        switch (lhs.type)
+        {
+        case LhsType::Char:
+            if (m_chars.find(lhs.code) != m_chars.end())
+                reader.RaiseError("redefining char");
+            m_chars[lhs.code] = sequence;
+            break;
+        case LhsType::Escape:
+            if (m_escapes[lhs.code].length() != 0)
+                reader.RaiseError("redefining escape");
+            m_escapes[lhs.code] = sequence;
+            break;
+        case LhsType::Constant:
+            if (m_constants.find(lhs.name) != m_constants.end())
+                reader.RaiseError("redefining constant");
+            m_constants[lhs.name] = sequence;
+            break;
+        }
+
+        reader.ExpectEmptyRestOfLine();
+    }
+}
diff --git a/tools/preproc/charmap.h b/tools/preproc/charmap.h
new file mode 100644
index 000000000..0d752ac99
--- /dev/null
+++ b/tools/preproc/charmap.h
@@ -0,0 +1,64 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef CHARMAP_H
+#define CHARMAP_H
+
+#include <cstdint>
+#include <string>
+#include <map>
+#include <vector>
+
+class Charmap
+{
+public:
+    Charmap(std::string filename);
+
+    std::string Char(std::int32_t code)
+    {
+        auto it = m_chars.find(code);
+
+        if (it == m_chars.end())
+            return std::string();
+
+        return it->second;
+    }
+
+    std::string Escape(unsigned char code)
+    {
+        return m_escapes[code];
+    }
+
+    std::string Constant(std::string identifier)
+    {
+        auto it = m_constants.find(identifier);
+
+        if (it == m_constants.end())
+            return std::string();
+
+        return it->second;
+    }
+private:
+    std::map<std::int32_t, std::string> m_chars;
+    std::string m_escapes[128];
+    std::map<std::string, std::string> m_constants;
+};
+
+#endif // CHARMAP_H
diff --git a/tools/preproc/preproc.cpp b/tools/preproc/preproc.cpp
new file mode 100644
index 000000000..c9c6042df
--- /dev/null
+++ b/tools/preproc/preproc.cpp
@@ -0,0 +1,156 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <string>
+#include <stack>
+#include "preproc.h"
+#include "asm_file.h"
+#include "c_file.h"
+#include "charmap.h"
+
+Charmap* g_charmap;
+
+void PrintAsmBytes(unsigned char *s, int length)
+{
+    if (length > 0)
+    {
+        std::printf("\t.byte ");
+        for (int i = 0; i < length; i++)
+        {
+            std::printf("0x%02X", s[i]);
+
+            if (i < length - 1)
+                std::printf(", ");
+        }
+        std::putchar('\n');
+    }
+}
+
+void PreprocAsmFile(std::string filename)
+{
+    std::stack<AsmFile> stack;
+
+    stack.push(AsmFile(filename));
+
+    for (;;)
+    {
+        while (stack.top().IsAtEnd())
+        {
+            stack.pop();
+
+            if (stack.empty())
+                return;
+            else
+                stack.top().OutputLocation();
+        }
+
+        Directive directive = stack.top().GetDirective();
+
+        switch (directive)
+        {
+        case Directive::Include:
+            stack.push(AsmFile(stack.top().ReadPath()));
+            stack.top().OutputLocation();
+            break;
+        case Directive::String:
+        {
+            unsigned char s[kMaxStringLength];
+            int length = stack.top().ReadString(s);
+            PrintAsmBytes(s, length);
+            break;
+        }
+        case Directive::Braille:
+        {
+            unsigned char s[kMaxStringLength];
+            int length = stack.top().ReadBraille(s);
+            PrintAsmBytes(s, length);
+            break;
+        }
+        case Directive::Unknown:
+        {
+            std::string globalLabel = stack.top().GetGlobalLabel();
+
+            if (globalLabel.length() != 0)
+            {
+                const char *s = globalLabel.c_str();
+                std::printf("%s: ; .global %s\n", s, s);
+            }
+            else
+            {
+                stack.top().OutputLine();
+            }
+
+            break;
+        }
+        }
+    }
+}
+
+void PreprocCFile(std::string filename)
+{
+    CFile cFile(filename);
+    cFile.Preproc();
+}
+
+char* GetFileExtension(char* filename)
+{
+    char* extension = filename;
+
+    while (*extension != 0)
+        extension++;
+
+    while (extension > filename && *extension != '.')
+        extension--;
+
+    if (extension == filename)
+        return nullptr;
+
+    extension++;
+
+    if (*extension == 0)
+        return nullptr;
+
+    return extension;
+}
+
+int main(int argc, char **argv)
+{
+    if (argc != 3)
+    {
+        std::fprintf(stderr, "Usage: %s SRC_FILE CHARMAP_FILE", argv[0]);
+        return 1;
+    }
+
+    g_charmap = new Charmap(argv[2]);
+
+    char* extension = GetFileExtension(argv[1]);
+
+    if (!extension)
+        FATAL_ERROR("\"%s\" has no file extension.\n", argv[1]);
+
+    if ((extension[0] == 's') && extension[1] == 0)
+        PreprocAsmFile(argv[1]);
+    else if ((extension[0] == 'c' || extension[0] == 'i') && extension[1] == 0)
+        PreprocCFile(argv[1]);
+    else
+        FATAL_ERROR("\"%s\" has an unknown file extension of \"%s\".\n", argv[1], extension);
+
+    return 0;
+}
diff --git a/tools/preproc/preproc.h b/tools/preproc/preproc.h
new file mode 100644
index 000000000..515f64e07
--- /dev/null
+++ b/tools/preproc/preproc.h
@@ -0,0 +1,54 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef PREPROC_H
+#define PREPROC_H
+
+#include <cstdio>
+#include <cstdlib>
+#include "charmap.h"
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)               \
+do                                             \
+{                                              \
+    std::fprintf(stderr, format, __VA_ARGS__); \
+    std::exit(1);                              \
+} while (0)
+
+#else
+
+#define FATAL_ERROR(format, ...)                 \
+do                                               \
+{                                                \
+    std::fprintf(stderr, format, ##__VA_ARGS__); \
+    std::exit(1);                                \
+} while (0)
+
+#endif // _MSC_VER
+
+const int kMaxPath = 256;
+const int kMaxStringLength = 1024;
+const unsigned long kMaxCharmapSequenceLength = 16;
+
+extern Charmap* g_charmap;
+
+#endif // PREPROC_H
diff --git a/tools/preproc/string_parser.cpp b/tools/preproc/string_parser.cpp
new file mode 100644
index 000000000..dd5196a44
--- /dev/null
+++ b/tools/preproc/string_parser.cpp
@@ -0,0 +1,355 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdarg>
+#include <stdexcept>
+#include "preproc.h"
+#include "string_parser.h"
+#include "char_util.h"
+#include "utf8.h"
+
+// Reads a charmap char or escape sequence.
+std::string StringParser::ReadCharOrEscape()
+{
+    std::string sequence;
+
+    bool isEscape = (m_buffer[m_pos] == '\\');
+
+    if (isEscape)
+    {
+        m_pos++;
+
+        if (m_buffer[m_pos] == '"')
+        {
+            sequence = g_charmap->Char('"');
+
+            if (sequence.length() == 0)
+                RaiseError("no mapping exists for double quote");
+
+            return sequence;
+        }
+        else if (m_buffer[m_pos] == '\\')
+        {
+            sequence = g_charmap->Char('\\');
+
+            if (sequence.length() == 0)
+                RaiseError("no mapping exists for backslash");
+
+            return sequence;
+        }
+    }
+
+    unsigned char c = m_buffer[m_pos];
+
+    if (c == 0)
+    {
+        if (m_pos >= m_size)
+            RaiseError("unexpected EOF in UTF-8 string");
+        else
+            RaiseError("unexpected null character in UTF-8 string");
+    }
+
+    if (IsAscii(c) && !IsAsciiPrintable(c))
+        RaiseError("unexpected character U+%X in UTF-8 string", c);
+
+    UnicodeChar unicodeChar = DecodeUtf8(&m_buffer[m_pos]);
+    m_pos += unicodeChar.encodingLength;
+    std::int32_t code = unicodeChar.code;
+
+    if (code == -1)
+        RaiseError("invalid encoding in UTF-8 string");
+
+    if (isEscape && code >= 128)
+        RaiseError("escapes using non-ASCII characters are invalid");
+
+    sequence = isEscape ? g_charmap->Escape(code) : g_charmap->Char(code);
+
+    if (sequence.length() == 0)
+    {
+        if (isEscape)
+            RaiseError("unknown escape '\\%c'", code);
+        else
+            RaiseError("unknown character U+%X", code);
+    }
+
+    return sequence;
+}
+
+// Reads a charmap constant, i.e. "{FOO}".
+std::string StringParser::ReadBracketedConstants()
+{
+    std::string totalSequence;
+
+    m_pos++; // Assume we're on the left curly bracket.
+
+    while (m_buffer[m_pos] != '}')
+    {
+        SkipWhitespace();
+
+        if (IsIdentifierStartingChar(m_buffer[m_pos]))
+        {
+            long startPos = m_pos;
+
+            m_pos++;
+
+            while (IsIdentifierChar(m_buffer[m_pos]))
+                m_pos++;
+
+            std::string sequence = g_charmap->Constant(std::string(&m_buffer[startPos], m_pos - startPos));
+
+            if (sequence.length() == 0)
+            {
+                m_buffer[m_pos] = 0;
+                RaiseError("unknown constant '%s'", &m_buffer[startPos]);
+            }
+
+            totalSequence += sequence;
+        }
+        else if (IsAsciiDigit(m_buffer[m_pos]))
+        {
+            Integer integer = ReadInteger();
+
+            switch (integer.size)
+            {
+            case 1:
+                totalSequence += (unsigned char)integer.value;
+                break;
+            case 2:
+                totalSequence += (unsigned char)integer.value;
+                totalSequence += (unsigned char)(integer.value >> 8);
+                break;
+            case 4:
+                totalSequence += (unsigned char)integer.value;
+                totalSequence += (unsigned char)(integer.value >> 8);
+                totalSequence += (unsigned char)(integer.value >> 16);
+                totalSequence += (unsigned char)(integer.value >> 24);
+                break;
+            }
+        }
+        else if (m_buffer[m_pos] == 0)
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF after left curly bracket");
+            else
+                RaiseError("unexpected null character within curly brackets");
+        }
+        else
+        {
+            if (IsAsciiPrintable(m_buffer[m_pos]))
+                RaiseError("unexpected character '%c' within curly brackets", m_buffer[m_pos]);
+            else
+                RaiseError("unexpected character '\\x%02X' within curly brackets", m_buffer[m_pos]);
+        }
+    }
+
+    m_pos++; // Go past the right curly bracket.
+
+    return totalSequence;
+}
+
+// Reads a charmap string.
+int StringParser::ParseString(long srcPos, unsigned char* dest, int& destLength)
+{
+    m_pos = srcPos;
+
+    if (m_buffer[m_pos] != '"')
+        RaiseError("expected UTF-8 string literal");
+
+    long start = m_pos;
+
+    m_pos++;
+
+    destLength = 0;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        std::string sequence = (m_buffer[m_pos] == '{') ? ReadBracketedConstants() : ReadCharOrEscape();
+
+        for (const char& c : sequence)
+        {
+            if (destLength == kMaxStringLength)
+                RaiseError("mapped string longer than %d bytes", kMaxStringLength);
+
+            dest[destLength++] = c;
+        }
+    }
+
+    m_pos++; // Go past the right quote.
+
+    return m_pos - start;
+}
+
+void StringParser::RaiseError(const char* format, ...)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+
+    std::va_list args;
+    va_start(args, format);
+    std::vsnprintf(buffer, bufferSize, format, args);
+    va_end(args);
+
+    throw std::runtime_error(buffer);
+}
+
+// Converts digit character to numerical value.
+static int ConvertDigit(char c, int radix)
+{
+    int digit;
+
+    if (c >= '0' && c <= '9')
+        digit = c - '0';
+    else if (c >= 'A' && c <= 'F')
+        digit = 10 + c - 'A';
+    else if (c >= 'a' && c <= 'f')
+        digit = 10 + c - 'a';
+    else
+        return -1;
+
+    return (digit < radix) ? digit : -1;
+}
+
+void StringParser::SkipRestOfInteger(int radix)
+{
+    while (ConvertDigit(m_buffer[m_pos], radix) != -1)
+        m_pos++;
+}
+
+StringParser::Integer StringParser::ReadDecimal()
+{
+    const int radix = 10;
+    std::uint64_t n = 0;
+    int digit;
+    std::uint64_t max = UINT32_MAX;
+    long startPos = m_pos;
+
+    while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
+    {
+        n = n * radix + digit;
+
+        if (n >= max)
+        {
+            SkipRestOfInteger(radix);
+
+            std::string intLiteral(m_buffer + startPos, m_pos - startPos);
+            RaiseError("integer literal \"%s\" is too large", intLiteral.c_str());
+        }
+
+        m_pos++;
+    }
+
+    int size;
+
+    if (m_buffer[m_pos] == 'H')
+    {
+        if (n >= 0x10000)
+        {
+            RaiseError("%lu is too large to be a halfword", (unsigned long)n);
+        }
+
+        size = 2;
+        m_pos++;
+    }
+    else if (m_buffer[m_pos] == 'W')
+    {
+        size = 4;
+        m_pos++;
+    }
+    else
+    {
+        if (n >= 0x10000)
+            size = 4;
+        else if (n >= 0x100)
+            size = 2;
+        else
+            size = 1;
+    }
+
+    return{ static_cast<std::uint32_t>(n), size };
+}
+
+StringParser::Integer StringParser::ReadHex()
+{
+    const int radix = 16;
+    std::uint64_t n = 0;
+    int digit;
+    std::uint64_t max = UINT32_MAX;
+    long startPos = m_pos;
+
+    while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
+    {
+        n = n * radix + digit;
+
+        if (n >= max)
+        {
+            SkipRestOfInteger(radix);
+
+            std::string intLiteral(m_buffer + startPos, m_pos - startPos);
+            RaiseError("integer literal \"%s\" is too large", intLiteral.c_str());
+        }
+
+        m_pos++;
+    }
+
+    int length = m_pos - startPos;
+    int size = 0;
+
+    switch (length)
+    {
+    case 2:
+        size = 1;
+        break;
+    case 4:
+        size = 2;
+        break;
+    case 8:
+        size = 4;
+        break;
+    default:
+    {
+        std::string intLiteral(m_buffer + startPos, m_pos - startPos);
+        RaiseError("hex integer literal \"0x%s\" doesn't have length of 2, 4, or 8 digits", intLiteral.c_str());
+    }
+    }
+
+    return{ static_cast<std::uint32_t>(n), size };
+}
+
+StringParser::Integer StringParser::ReadInteger()
+{
+    if (!IsAsciiDigit(m_buffer[m_pos]))
+        RaiseError("expected integer");
+
+    if (m_buffer[m_pos] == '0' && m_buffer[m_pos + 1] == 'x')
+    {
+        m_pos += 2;
+        return ReadHex();
+    }
+
+    return ReadDecimal();
+}
+
+// Skips tabs and spaces.
+void StringParser::SkipWhitespace()
+{
+    while (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+        m_pos++;
+}
diff --git a/tools/preproc/string_parser.h b/tools/preproc/string_parser.h
new file mode 100644
index 000000000..abd2bfe9a
--- /dev/null
+++ b/tools/preproc/string_parser.h
@@ -0,0 +1,55 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef STRING_PARSER_H
+#define STRING_PARSER_H
+
+#include <cstdint>
+#include <string>
+#include "preproc.h"
+
+class StringParser
+{
+public:
+    StringParser(char* buffer, long size) : m_buffer(buffer), m_size(size), m_pos(0) {}
+    int ParseString(long srcPos, unsigned char* dest, int &destLength);
+
+private:
+    struct Integer
+    {
+        std::uint32_t value;
+        int size;
+    };
+
+    char* m_buffer;
+    long m_size;
+    long m_pos;
+
+    Integer ReadInteger();
+    Integer ReadDecimal();
+    Integer ReadHex();
+    std::string ReadCharOrEscape();
+    std::string ReadBracketedConstants();
+    void SkipWhitespace();
+    void SkipRestOfInteger(int radix);
+    void RaiseError(const char* format, ...);
+};
+
+#endif // STRING_PARSER_H
diff --git a/tools/preproc/utf8.cpp b/tools/preproc/utf8.cpp
new file mode 100644
index 000000000..7facfd44e
--- /dev/null
+++ b/tools/preproc/utf8.cpp
@@ -0,0 +1,92 @@
+// Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+//
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdint>
+#include "utf8.h"
+
+static const unsigned char s_byteTypeTable[] =
+{
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 00..1f
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 20..3f
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 40..5f
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 60..7f
+    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, // 80..9f
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, // a0..bf
+    8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, // c0..df
+    0xa,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x4,0x3,0x3, // e0..ef
+    0xb,0x6,0x6,0x6,0x5,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8, // f0..ff
+};
+
+const unsigned char s0 = 0 * 12;
+const unsigned char s1 = 1 * 12;
+const unsigned char s2 = 2 * 12;
+const unsigned char s3 = 3 * 12;
+const unsigned char s4 = 4 * 12;
+const unsigned char s5 = 5 * 12;
+const unsigned char s6 = 6 * 12;
+const unsigned char s7 = 7 * 12;
+const unsigned char s8 = 8 * 12;
+
+static const unsigned char s_transitionTable[] =
+{
+    s0,s1,s2,s3,s5,s8,s7,s1,s1,s1,s4,s6, // s0
+    s1,s1,s1,s1,s1,s1,s1,s1,s1,s1,s1,s1, // s1
+    s1,s0,s1,s1,s1,s1,s1,s0,s1,s0,s1,s1, // s2
+    s1,s2,s1,s1,s1,s1,s1,s2,s1,s2,s1,s1, // s3
+    s1,s1,s1,s1,s1,s1,s1,s2,s1,s1,s1,s1, // s4
+    s1,s2,s1,s1,s1,s1,s1,s1,s1,s2,s1,s1, // s5
+    s1,s1,s1,s1,s1,s1,s1,s3,s1,s3,s1,s1, // s6
+    s1,s3,s1,s1,s1,s1,s1,s3,s1,s3,s1,s1, // s7
+    s1,s3,s1,s1,s1,s1,s1,s1,s1,s1,s1,s1, // s8
+};
+
+// Decodes UTF-8 encoded Unicode code point at "s".
+UnicodeChar DecodeUtf8(const char* s)
+{
+    UnicodeChar unicodeChar;
+    int state = s0;
+    auto start = s;
+
+    do
+    {
+        unsigned char byte = *s++;
+        int type = s_byteTypeTable[byte];
+
+        if (state == s0)
+            unicodeChar.code = (0xFF >> type) & byte;
+        else
+            unicodeChar.code = (unicodeChar.code << 6) | (byte & 0x3F);
+
+        state = s_transitionTable[state + type];
+
+        if (state == s1)
+        {
+            unicodeChar.code = -1;
+            return unicodeChar;
+        }
+    } while (state != s0);
+
+    unicodeChar.encodingLength = s - start;
+
+    return unicodeChar;
+}
diff --git a/tools/preproc/utf8.h b/tools/preproc/utf8.h
new file mode 100644
index 000000000..259de67c5
--- /dev/null
+++ b/tools/preproc/utf8.h
@@ -0,0 +1,34 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef UTF8_H
+#define UTF8_H
+
+#include <cstdint>
+
+struct UnicodeChar
+{
+    std::int32_t code;
+    int encodingLength;
+};
+
+UnicodeChar DecodeUtf8(const char* s);
+
+#endif // UTF8_H
diff --git a/tools/ramscrgen/.gitignore b/tools/ramscrgen/.gitignore
new file mode 100644
index 000000000..4d0ae82c3
--- /dev/null
+++ b/tools/ramscrgen/.gitignore
@@ -0,0 +1 @@
+ramscrgen
diff --git a/tools/ramscrgen/LICENSE b/tools/ramscrgen/LICENSE
new file mode 100644
index 000000000..534d15349
--- /dev/null
+++ b/tools/ramscrgen/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/ramscrgen/Makefile b/tools/ramscrgen/Makefile
new file mode 100644
index 000000000..cc6d458ba
--- /dev/null
+++ b/tools/ramscrgen/Makefile
@@ -0,0 +1,15 @@
+CXX := g++
+
+CXXFLAGS := -std=c++11 -O2 -s -Wall -Wno-switch -Werror
+
+SRCS := main.cpp sym_file.cpp elf.cpp
+
+HEADERS := ramscrgen.h sym_file.h elf.h char_util.h
+
+.PHONY: clean
+
+ramscrgen: $(SRCS) $(HEADERS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) ramscrgen ramscrgen.exe
diff --git a/tools/ramscrgen/char_util.h b/tools/ramscrgen/char_util.h
new file mode 100644
index 000000000..ab20dbc53
--- /dev/null
+++ b/tools/ramscrgen/char_util.h
@@ -0,0 +1,71 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef CHAR_UTIL_H
+#define CHAR_UTIL_H
+
+#include <cstdint>
+#include <cassert>
+
+inline bool IsAscii(unsigned char c)
+{
+    return (c < 128);
+}
+
+inline bool IsAsciiAlpha(unsigned char c)
+{
+    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
+}
+
+inline bool IsAsciiDigit(unsigned char c)
+{
+    return (c >= '0' && c <= '9');
+}
+
+inline bool IsAsciiHexDigit(unsigned char c)
+{
+    return ((c >= '0' && c <= '9')
+        || (c >= 'a' && c <= 'f')
+        || (c >= 'A' && c <= 'F'));
+}
+
+inline bool IsAsciiAlphanum(unsigned char c)
+{
+    return (IsAsciiAlpha(c) || IsAsciiDigit(c));
+}
+
+inline bool IsAsciiPrintable(unsigned char c)
+{
+    return (c >= ' ' && c <= '~');
+}
+
+// Returns whether the character can start the identifier of a "{FOO}" constant in strings.
+inline bool IsIdentifierStartingChar(unsigned char c)
+{
+    return IsAsciiAlpha(c) || c == '_';
+}
+
+// Returns whether the character can be used in the identifier of a "{FOO}" constant in strings.
+inline bool IsIdentifierChar(unsigned char c)
+{
+    return IsAsciiAlphanum(c) || c == '_';
+}
+
+#endif // CHAR_UTIL_H
diff --git a/tools/ramscrgen/elf.cpp b/tools/ramscrgen/elf.cpp
new file mode 100644
index 000000000..7599fe0bb
--- /dev/null
+++ b/tools/ramscrgen/elf.cpp
@@ -0,0 +1,195 @@
+#include <cstdio>
+#include <cstring>
+#include <cstdint>
+#include <map>
+#include <vector>
+#include <string>
+#include "ramscrgen.h"
+#include "elf.h"
+
+#define SHN_COMMON 0xFFF2
+
+static std::string s_elfPath;
+
+static FILE *s_file;
+
+static std::uint32_t s_sectionHeaderOffset;
+static int s_sectionHeaderEntrySize;
+static int s_sectionCount;
+static int s_shstrtabIndex;
+
+static std::uint32_t s_symtabOffset;
+static std::uint32_t s_strtabOffset;
+
+static std::uint32_t s_symbolCount;
+
+struct Symbol
+{
+    std::uint32_t nameOffset;
+    std::uint32_t size;
+};
+
+static void Seek(long offset)
+{
+    if (std::fseek(s_file, offset, SEEK_SET) != 0)
+        FATAL_ERROR("error: failed to seek to %ld in \"%s\"", offset, s_elfPath.c_str());
+}
+
+static void Skip(long offset)
+{
+    if (std::fseek(s_file, offset, SEEK_CUR) != 0)
+        FATAL_ERROR("error: failed to skip %ld bytes in \"%s\"", offset, s_elfPath.c_str());
+}
+
+static std::uint32_t ReadInt8()
+{
+    int c = std::fgetc(s_file);
+
+    if (c < 0)
+        FATAL_ERROR("error: unexpected EOF when reading ELF file \"%s\"\n", s_elfPath.c_str());
+
+    return c;
+}
+
+static std::uint32_t ReadInt16()
+{
+    std::uint32_t val = 0;
+    val |= ReadInt8();
+    val |= ReadInt8() << 8;
+    return val;
+}
+
+static std::uint32_t ReadInt32()
+{
+    std::uint32_t val = 0;
+    val |= ReadInt8();
+    val |= ReadInt8() << 8;
+    val |= ReadInt8() << 16;
+    val |= ReadInt8() << 24;
+    return val;
+}
+
+static std::string ReadString()
+{
+    std::string s;
+    char c;
+
+    while ((c = ReadInt8()) != 0)
+        s += c;
+
+    return s;
+}
+
+static void VerifyElfIdent()
+{
+    char expectedMagic[4] = { 0x7F, 'E', 'L', 'F' };
+    char magic[4];
+
+    if (std::fread(magic, 4, 1, s_file) != 1)
+        FATAL_ERROR("error: failed to read ELF magic from \"%s\"\n", s_elfPath.c_str());
+
+    if (std::memcmp(magic, expectedMagic, 4) != 0)
+        FATAL_ERROR("error: ELF magic did not match in \"%s\"\n", s_elfPath.c_str());
+
+    if (std::fgetc(s_file) != 1)
+        FATAL_ERROR("error: \"%s\" not 32-bit ELF\n", s_elfPath.c_str());
+
+    if (std::fgetc(s_file) != 1)
+        FATAL_ERROR("error: \"%s\" not little-endian ELF\n", s_elfPath.c_str());
+}
+
+static void ReadElfHeader()
+{
+    Seek(0x20);
+    s_sectionHeaderOffset = ReadInt32();
+    Seek(0x2E);
+    s_sectionHeaderEntrySize = ReadInt16();
+    s_sectionCount = ReadInt16();
+    s_shstrtabIndex = ReadInt16();
+}
+
+static std::string GetSectionName(std::uint32_t shstrtabOffset, int index)
+{
+    Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * index);
+    std::uint32_t nameOffset = ReadInt32();
+    Seek(shstrtabOffset + nameOffset);
+    return ReadString();
+}
+
+static void FindTableOffsets()
+{
+    s_symtabOffset = 0;
+    s_strtabOffset = 0;
+
+    Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * s_shstrtabIndex + 0x10);
+    std::uint32_t shstrtabOffset = ReadInt32();
+
+    for (int i = 0; i < s_sectionCount; i++)
+    {
+        std::string name = GetSectionName(shstrtabOffset, i);
+
+        if (name == ".symtab")
+        {
+            if (s_symtabOffset)
+                FATAL_ERROR("error: mutiple .symtab sections found in \"%s\"\n", s_elfPath.c_str());
+            Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10);
+            s_symtabOffset = ReadInt32();
+            std::uint32_t size = ReadInt32();
+            s_symbolCount = size / 16;
+        }
+        else if (name == ".strtab")
+        {
+            if (s_strtabOffset)
+                FATAL_ERROR("error: mutiple .strtab sections found in \"%s\"\n", s_elfPath.c_str());
+            Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10);
+            s_strtabOffset = ReadInt32();
+        }
+    }
+
+    if (!s_symtabOffset)
+        FATAL_ERROR("error: couldn't find .symtab section in \"%s\"\n", s_elfPath.c_str());
+
+    if (!s_strtabOffset)
+        FATAL_ERROR("error: couldn't find .strtab section in \"%s\"\n", s_elfPath.c_str());
+}
+
+std::map<std::string, std::uint32_t> GetCommonSymbols(std::string path)
+{
+    s_elfPath = path;
+
+    std::map<std::string, std::uint32_t> commonSymbols;
+
+    s_file = std::fopen(s_elfPath.c_str(), "rb");
+
+    if (s_file == NULL)
+        FATAL_ERROR("error: failed to open \"%s\" for reading\n", path.c_str());
+
+    VerifyElfIdent();
+    ReadElfHeader();
+    FindTableOffsets();
+    
+    std::vector<Symbol> commonSymbolVec;
+
+    Seek(s_symtabOffset);
+
+    for (std::uint32_t i = 0; i < s_symbolCount; i++)
+    {
+        Symbol sym;
+        sym.nameOffset = ReadInt32();
+        Skip(4);
+        sym.size = ReadInt32();
+        Skip(2);
+        std::uint16_t sectionIndex = ReadInt16();
+        if (sectionIndex == SHN_COMMON)
+            commonSymbolVec.push_back(sym);
+    }
+
+    for (const Symbol& sym : commonSymbolVec)
+    {
+        Seek(s_strtabOffset + sym.nameOffset);
+        std::string name = ReadString();
+        commonSymbols[name] = sym.size;
+    }
+
+    return commonSymbols;
+}
diff --git a/tools/ramscrgen/elf.h b/tools/ramscrgen/elf.h
new file mode 100644
index 000000000..0bfdd696f
--- /dev/null
+++ b/tools/ramscrgen/elf.h
@@ -0,0 +1,30 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef ELF_H
+#define ELF_H
+
+#include <cstdint>
+#include <map>
+#include <string>
+
+std::map<std::string, std::uint32_t> GetCommonSymbols(std::string path);
+
+#endif // ELF_H
diff --git a/tools/ramscrgen/main.cpp b/tools/ramscrgen/main.cpp
new file mode 100644
index 000000000..6c4f4bbd7
--- /dev/null
+++ b/tools/ramscrgen/main.cpp
@@ -0,0 +1,173 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstring>
+#include <string>
+#include "ramscrgen.h"
+#include "sym_file.h"
+#include "elf.h"
+
+void HandleCommonInclude(std::string filename, std::string sourcePath, std::string symOrderPath, std::string lang)
+{
+    auto commonSymbols = GetCommonSymbols(sourcePath + "/" + filename);
+
+    std::size_t dotIndex = filename.find_last_of('.');
+
+    if (dotIndex == std::string::npos)
+        FATAL_ERROR("error: \"%s\" doesn't have a file extension\n", filename.c_str());
+
+    std::string symOrderFilename = filename.substr(0, dotIndex + 1) + "txt";
+
+    SymFile symFile(symOrderPath + "/" + symOrderFilename);
+
+    while (!symFile.IsAtEnd())
+    {
+        symFile.HandleLangConditional(lang);
+
+        std::string label = symFile.GetLabel(false);
+
+        if (label.length() == 0)
+        {
+            unsigned long length;
+            if (symFile.ReadInteger(length))
+            {
+                if (length & 3)
+                    symFile.RaiseWarning("gap length %d is not multiple of 4", length);
+                printf(". += 0x%lX;\n", length);
+            }
+        }
+        else
+        {
+            if (commonSymbols.count(label) == 0)
+                symFile.RaiseError("no common symbol named \"%s\"", label.c_str());
+            unsigned long size = commonSymbols[label];
+            int alignment = 4;
+            if (size > 4)
+                alignment = 8;
+            if (size > 8)
+                alignment = 16;
+            printf(". = ALIGN(%d);\n", alignment);
+            printf("%s = .;\n", label.c_str());
+            printf(". += 0x%lX;\n", size);
+        }
+
+        symFile.ExpectEmptyRestOfLine();
+    }
+}
+
+void ConvertSymFile(std::string filename, std::string sectionName, std::string lang, bool common, std::string sourcePath, std::string commonSymPath)
+{
+    SymFile symFile(filename);
+
+    while (!symFile.IsAtEnd())
+    {
+        symFile.HandleLangConditional(lang);
+
+        Directive directive = symFile.GetDirective();
+
+        switch (directive)
+        {
+        case Directive::Include:
+        {
+            std::string incFilename = symFile.ReadPath();
+            symFile.ExpectEmptyRestOfLine();
+            printf(". = ALIGN(4);\n");
+            if (common)
+                HandleCommonInclude(incFilename, sourcePath, commonSymPath, lang);
+            else
+                printf("%s(%s);\n", incFilename.c_str(), sectionName.c_str());
+            break;
+        }
+        case Directive::Space:
+        {
+            unsigned long length;
+            if (!symFile.ReadInteger(length))
+                symFile.RaiseError("expected integer after .space directive");
+            symFile.ExpectEmptyRestOfLine();
+            printf(". += 0x%lX;\n", length);
+            break;
+        }
+        case Directive::Align:
+        {
+            unsigned long amount;
+            if (!symFile.ReadInteger(amount))
+                symFile.RaiseError("expected integer after .align directive");
+            if (amount > 4)
+                symFile.RaiseError("max alignment amount is 4");
+            amount = 1UL << amount;
+            symFile.ExpectEmptyRestOfLine();
+            printf(". = ALIGN(%lu);\n", amount);
+            break;
+        }
+        case Directive::Unknown:
+        {
+            std::string label = symFile.GetLabel();
+
+            if (label.length() != 0)
+            {
+                printf("%s = .;\n", label.c_str());
+            }
+
+            symFile.ExpectEmptyRestOfLine();
+
+            break;
+        }
+        }
+    }
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 4)
+    {
+        fprintf(stderr, "Usage: %s SECTION_NAME SYM_FILE LANG [-c SRC_PATH,COMMON_SYM_PATH]", argv[0]);
+        return 1;
+    }
+
+    bool common = false;
+    std::string sectionName = std::string(argv[1]);
+    std::string symFileName = std::string(argv[2]);
+    std::string lang = std::string(argv[3]);
+    std::string sourcePath;
+    std::string commonSymPath;
+
+    if (argc > 4)
+    {
+        if (std::strcmp(argv[4], "-c") != 0)
+            FATAL_ERROR("error: unrecognized argument \"%s\"\n", argv[4]);
+
+        if (argc < 6)
+            FATAL_ERROR("error: missing SRC_PATH,COMMON_SYM_PATH after \"-c\"\n");
+
+        common = true;
+        std::string paths = std::string(argv[5]);
+        std::size_t commaPos = paths.find(',');
+
+        if (commaPos == std::string::npos)
+            FATAL_ERROR("error: missing comma in argument after \"-c\"\n");
+
+        sourcePath = paths.substr(0, commaPos);
+        commonSymPath = paths.substr(commaPos + 1);
+    }
+
+    ConvertSymFile(symFileName, sectionName, lang, common, sourcePath, commonSymPath);
+    return 0;
+}
diff --git a/tools/ramscrgen/ramscrgen.h b/tools/ramscrgen/ramscrgen.h
new file mode 100644
index 000000000..1aed1c05a
--- /dev/null
+++ b/tools/ramscrgen/ramscrgen.h
@@ -0,0 +1,49 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef RAMSCRGEN_H
+#define RAMSCRGEN_H
+
+#include <cstdio>
+#include <cstdlib>
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)               \
+do                                             \
+{                                              \
+    std::fprintf(stderr, format, __VA_ARGS__); \
+    std::exit(1);                              \
+} while (0)
+
+#else
+
+#define FATAL_ERROR(format, ...)                 \
+do                                               \
+{                                                \
+    std::fprintf(stderr, format, ##__VA_ARGS__); \
+    std::exit(1);                                \
+} while (0)
+
+#endif // _MSC_VER
+
+const int kMaxPath = 256;
+
+#endif // RAMSCRGEN_H
diff --git a/tools/ramscrgen/sym_file.cpp b/tools/ramscrgen/sym_file.cpp
new file mode 100644
index 000000000..5379bd93f
--- /dev/null
+++ b/tools/ramscrgen/sym_file.cpp
@@ -0,0 +1,492 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdarg>
+#include <climits>
+#include "ramscrgen.h"
+#include "sym_file.h"
+#include "char_util.h"
+
+SymFile::SymFile(std::string filename) : m_filename(filename)
+{
+    FILE *fp = std::fopen(filename.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    if (m_size < 0)
+        FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str());
+
+    m_buffer = new char[m_size + 1];
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str());
+
+    m_buffer[m_size] = 0;
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+    m_lineStart = 0;
+    m_inLangConditional = false;
+
+    RemoveComments();
+}
+
+SymFile::SymFile(SymFile&& other) : m_filename(std::move(other.m_filename))
+{
+    m_buffer = other.m_buffer;
+    m_pos = other.m_pos;
+    m_size = other.m_size;
+    m_lineNum = other.m_lineNum;
+    m_lineStart = other.m_lineStart;
+
+    other.m_buffer = nullptr;
+}
+
+SymFile::~SymFile()
+{
+    delete[] m_buffer;
+}
+
+// Removes comments to simplify further processing.
+// It stops upon encountering a null character,
+// which may or may not be the end of file marker.
+// If it's not, the error will be caught later.
+void SymFile::RemoveComments()
+{
+    long pos = 0;
+    char stringChar = 0;
+
+    for (;;)
+    {
+        if (m_buffer[pos] == 0)
+            return;
+
+        if (stringChar != 0)
+        {
+            if (m_buffer[pos] == '\\' && m_buffer[pos + 1] == stringChar)
+            {
+                pos += 2;
+            }
+            else
+            {
+                if (m_buffer[pos] == stringChar)
+                    stringChar = 0;
+                pos++;
+            }
+        }
+        else if (m_buffer[pos] == '@' && (pos == 0 || m_buffer[pos - 1] != '\\'))
+        {
+            while (m_buffer[pos] != '\n' && m_buffer[pos] != 0)
+                m_buffer[pos++] = ' ';
+        }
+        else if (m_buffer[pos] == '/' && m_buffer[pos + 1] == '*')
+        {
+            m_buffer[pos++] = ' ';
+            m_buffer[pos++] = ' ';
+
+            char commentStringChar = 0;
+
+            for (;;)
+            {
+                if (m_buffer[pos] == 0)
+                    return;
+
+                if (commentStringChar != 0)
+                {
+                    if (m_buffer[pos] == '\\' && m_buffer[pos + 1] == commentStringChar)
+                    {
+                        m_buffer[pos++] = ' ';
+                        m_buffer[pos++] = ' ';
+                    }
+                    else
+                    {
+                        if (m_buffer[pos] == commentStringChar)
+                            commentStringChar = 0;
+                        if (m_buffer[pos] != '\n')
+                            m_buffer[pos] = ' ';
+                        pos++;
+                    }
+                }
+                else
+                {
+                    if (m_buffer[pos] == '*' && m_buffer[pos + 1] == '/')
+                    {
+                        m_buffer[pos++] = ' ';
+                        m_buffer[pos++] = ' ';
+                        break;
+                    }
+                    else
+                    {
+                        if (m_buffer[pos] == '"' || m_buffer[pos] == '\'')
+                            commentStringChar = m_buffer[pos];
+                        if (m_buffer[pos] != '\n')
+                            m_buffer[pos] = ' ';
+                        pos++;
+                    }
+                }
+            }
+        }
+        else
+        {
+            if (m_buffer[pos] == '"' || m_buffer[pos] == '\'')
+                stringChar = m_buffer[pos];
+            pos++;
+        }
+    }
+}
+
+// Checks if we're at a particular directive and if so, consumes it.
+// Returns whether the directive was found.
+bool SymFile::CheckForDirective(std::string name)
+{
+    long i;
+    long length = static_cast<long>(name.length());
+
+    for (i = 0; i < length && m_pos + i < m_size; i++)
+        if (name[i] != m_buffer[m_pos + i])
+            return false;
+
+    if (i < length)
+        return false;
+
+    m_pos += length;
+
+    return true;
+}
+
+// Checks if we're at a known directive and if so, consumes it.
+// Returns which directive was found.
+Directive SymFile::GetDirective()
+{
+    SkipWhitespace();
+
+    if (CheckForDirective(".include"))
+        return Directive::Include;
+    else if (CheckForDirective(".space"))
+        return Directive::Space;
+    else if (CheckForDirective(".align"))
+        return Directive::Align;
+    else
+        return Directive::Unknown;
+}
+
+// Checks if we're at label.
+// Returns the name if so and an empty string if not.
+std::string SymFile::GetLabel(bool requireColon)
+{
+    long start = m_pos;
+    long pos = m_pos;
+
+    if (IsIdentifierStartingChar(m_buffer[pos]))
+    {
+        pos++;
+
+        while (IsIdentifierChar(m_buffer[pos]))
+            pos++;
+    }
+
+    if (requireColon)
+    {
+        if (m_buffer[pos] == ':')
+        {
+            if (pos != start)
+                m_pos = pos + 1;
+        }
+        else
+        {
+            pos = start;
+        }
+    }
+    else
+    {
+        m_pos = pos;
+    }
+
+    return std::string(&m_buffer[start], pos - start);
+}
+
+// Skips tabs and spaces.
+void SymFile::SkipWhitespace()
+{
+    while (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+        m_pos++;
+}
+
+// Reads include path.
+std::string SymFile::ReadPath()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '"')
+        RaiseError("expected file path");
+
+    m_pos++;
+
+    int length = 0;
+    long startPos = m_pos;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        unsigned char c = m_buffer[m_pos++];
+
+        if (c == 0)
+        {
+            if (m_pos >= m_size)
+                RaiseError("unexpected EOF in include string");
+            else
+                RaiseError("unexpected null character in include string");
+        }
+
+        if (!IsAsciiPrintable(c))
+            RaiseError("unexpected character '\\x%02X' in include string", c);
+
+        // Don't bother allowing any escape sequences.
+        if (c == '\\')
+        {
+            c = m_buffer[m_pos];
+            RaiseError("unexpected escape '\\%c' in include string", c);
+        }
+
+        length++;
+
+        if (length > kMaxPath)
+            RaiseError("path is too long");
+    }
+
+    m_pos++; // Go past the right quote.
+
+    return std::string(&m_buffer[startPos], length);
+}
+
+// If we're at a comma, consumes it.
+// Returns whether a comma was found.
+bool SymFile::ConsumeComma()
+{
+    if (m_buffer[m_pos] == ',')
+    {
+        m_pos++;
+        return true;
+    }
+
+    return false;
+}
+
+// Converts digit character to numerical value.
+static int ConvertDigit(char c, int radix)
+{
+    int digit;
+
+    if (c >= '0' && c <= '9')
+        digit = c - '0';
+    else if (c >= 'A' && c <= 'F')
+        digit = 10 + c - 'A';
+    else if (c >= 'a' && c <= 'f')
+        digit = 10 + c - 'a';
+    else
+        return -1;
+
+    return (digit < radix) ? digit : -1;
+}
+
+// Reads an integer.
+bool SymFile::ReadInteger(unsigned long& n)
+{
+    SkipWhitespace();
+
+    if (!IsAsciiDigit(m_buffer[m_pos]))
+        return false;
+
+    int startPos = m_pos;
+    int radix = 10;
+
+    if (m_buffer[m_pos] == '0' && m_buffer[m_pos + 1] == 'x')
+    {
+        radix = 16;
+        m_pos += 2;
+    }
+
+    unsigned long cutoff = ULONG_MAX / radix;
+    unsigned long cutoffRemainder = ULONG_MAX % radix;
+    int digit;
+
+    n = 0;
+
+    while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
+    {
+        if (n < cutoff || (n == cutoff && (unsigned long)digit <= cutoffRemainder))
+        {
+            n = n * radix + digit;
+        }
+        else
+        {
+            m_pos++;
+
+            while (ConvertDigit(m_buffer[m_pos], radix) != -1)
+                m_pos++;
+
+            RaiseError("integer is too large (%s)", std::string(&m_buffer[startPos], m_pos - startPos).c_str());
+        }
+
+        m_pos++;
+    }
+
+    return true;
+}
+
+// Asserts that the rest of the line is empty and moves to the next one.
+void SymFile::ExpectEmptyRestOfLine()
+{
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] == 0)
+    {
+        if (m_pos >= m_size)
+            RaiseWarning("file doesn't end with newline");
+        else
+            RaiseError("unexpected null character");
+    }
+    else if (m_buffer[m_pos] == '\n')
+    {
+        m_pos++;
+        m_lineStart = m_pos;
+        m_lineNum++;
+    }
+    else if (m_buffer[m_pos] == '\r')
+    {
+        RaiseError("only Unix-style LF newlines are supported");
+    }
+    else
+    {
+        RaiseError("junk at end of line");
+    }
+}
+
+
+void SymFile::SkipLine()
+{
+    while (m_buffer[m_pos] != 0 && m_buffer[m_pos] != '\n')
+        m_pos++;
+
+    if (m_buffer[m_pos] == '\n')
+        m_pos++;
+}
+
+// Checks if we're at the end of the file.
+bool SymFile::IsAtEnd()
+{
+    return (m_pos >= m_size);
+}
+
+void SymFile::HandleLangConditional(std::string lang)
+{
+    if (m_buffer[m_pos] != '#')
+        return;
+
+    m_pos++;
+
+    if (CheckForDirective("begin"))
+    {
+        if (m_inLangConditional)
+            RaiseError("already inside language conditional");
+
+        SkipWhitespace();
+
+        std::string label = GetLabel(false);
+
+        if (label.length() == 0)
+            RaiseError("no language name after #begin");
+
+        ExpectEmptyRestOfLine();
+
+        if (lang == label)
+        {
+            m_inLangConditional = true;
+        }
+        else
+        {
+            while (!IsAtEnd() && m_buffer[m_pos] != '#')
+                SkipLine();
+
+            if (m_buffer[m_pos] != '#')
+                RaiseError("unterminated language conditional");
+
+            m_pos++;
+
+            if (!CheckForDirective("end"))
+                RaiseError("expected #end");
+
+            ExpectEmptyRestOfLine();
+        }
+    }
+    else if (CheckForDirective("end"))
+    {
+        if (!m_inLangConditional)
+            RaiseError("not inside language conditional");
+
+        m_inLangConditional = false;
+
+        ExpectEmptyRestOfLine();
+    }
+    else
+    {
+        RaiseError("unknown # directive");
+    }
+}
+
+// Reports a diagnostic message.
+void SymFile::ReportDiagnostic(const char* type, const char* format, std::va_list args)
+{
+    const int bufferSize = 1024;
+    char buffer[bufferSize];
+    std::vsnprintf(buffer, bufferSize, format, args);
+    std::fprintf(stderr, "%s:%ld: %s: %s\n", m_filename.c_str(), m_lineNum, type, buffer);
+}
+
+#define DO_REPORT(type)                   \
+do                                        \
+{                                         \
+    std::va_list args;                    \
+    va_start(args, format);               \
+    ReportDiagnostic(type, format, args); \
+    va_end(args);                         \
+} while (0)
+
+// Reports an error diagnostic and terminates the program.
+void SymFile::RaiseError(const char* format, ...)
+{
+    DO_REPORT("error");
+    std::exit(1);
+}
+
+// Reports a warning diagnostic.
+void SymFile::RaiseWarning(const char* format, ...)
+{
+    DO_REPORT("warning");
+}
diff --git a/tools/ramscrgen/sym_file.h b/tools/ramscrgen/sym_file.h
new file mode 100644
index 000000000..bb0c8038d
--- /dev/null
+++ b/tools/ramscrgen/sym_file.h
@@ -0,0 +1,71 @@
+// Copyright(c) 2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef SYM_FILE_H
+#define SYM_FILE_H
+
+#include <cstdarg>
+#include <cstdint>
+#include <string>
+#include "ramscrgen.h"
+
+enum class Directive
+{
+    Include,
+    Space,
+    Align,
+    Unknown
+};
+
+class SymFile
+{
+public:
+    SymFile(std::string filename);
+    SymFile(SymFile&& other);
+    SymFile(const SymFile&) = delete;
+    ~SymFile();
+    Directive GetDirective();
+    std::string GetLabel(bool requireColon = true);
+    std::string ReadPath();
+    bool ReadInteger(unsigned long& value);
+    void ExpectEmptyRestOfLine();
+    void SkipLine();
+    bool IsAtEnd();
+    void HandleLangConditional(std::string lang);
+    void RaiseError(const char* format, ...);
+    void RaiseWarning(const char* format, ...);
+
+private:
+    char* m_buffer;
+    long m_pos;
+    long m_size;
+    long m_lineNum;
+    long m_lineStart;
+    std::string m_filename;
+    bool m_inLangConditional;
+
+    bool ConsumeComma();
+    void RemoveComments();
+    bool CheckForDirective(std::string name);
+    void SkipWhitespace();
+    void ReportDiagnostic(const char* type, const char* format, std::va_list args);
+};
+
+#endif // SYM_FILE_H
diff --git a/tools/rsfont/.gitignore b/tools/rsfont/.gitignore
new file mode 100644
index 000000000..3140ececc
--- /dev/null
+++ b/tools/rsfont/.gitignore
@@ -0,0 +1 @@
+rsfont
diff --git a/tools/rsfont/LICENSE b/tools/rsfont/LICENSE
new file mode 100644
index 000000000..b497950c1
--- /dev/null
+++ b/tools/rsfont/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015-2016 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/rsfont/Makefile b/tools/rsfont/Makefile
new file mode 100644
index 000000000..a78beca50
--- /dev/null
+++ b/tools/rsfont/Makefile
@@ -0,0 +1,15 @@
+CC = gcc
+
+CFLAGS = -Wall -Wextra -Werror -std=c11 -O2 -s -DPNG_SKIP_SETJMP_CHECK
+
+LIBS = -lpng -lz
+
+SRCS = main.c convert_png.c util.c font.c
+
+.PHONY: clean
+
+rsfont: $(SRCS) convert_png.h gfx.h global.h util.h font.h
+	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
+
+clean:
+	$(RM) rsfont rsfont.exe
diff --git a/tools/rsfont/convert_png.c b/tools/rsfont/convert_png.c
new file mode 100644
index 000000000..f6a30804a
--- /dev/null
+++ b/tools/rsfont/convert_png.c
@@ -0,0 +1,169 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <png.h>
+#include "global.h"
+#include "convert_png.h"
+#include "gfx.h"
+
+void ReadPng(char *path, struct Image *image)
+{
+	FILE *fp = fopen(path, "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+	unsigned char sig[8];
+
+	if (fread(sig, 8, 1, fp) != 1)
+		FATAL_ERROR("Failed to read PNG signature from \"%s\".\n", path);
+
+	if (png_sig_cmp(sig, 0, 8))
+		FATAL_ERROR("\"%s\" does not have a valid PNG signature.\n", path);
+
+	png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+	if (!png_ptr)
+		FATAL_ERROR("Failed to create PNG read struct.\n");
+
+	png_infop info_ptr = png_create_info_struct(png_ptr);
+
+	if (!info_ptr)
+		FATAL_ERROR("Failed to create PNG info struct.\n");
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Failed to init I/O for reading \"%s\".\n", path);
+
+	png_init_io(png_ptr, fp);
+	png_set_sig_bytes(png_ptr, 8);
+	png_read_info(png_ptr, info_ptr);
+
+	int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
+
+	if (bit_depth != image->bitDepth)
+		FATAL_ERROR("\"%s\" has a bit depth of %d, but the expected bit depth is %d.\n", path, bit_depth, image->bitDepth);
+
+	int color_type = png_get_color_type(png_ptr, info_ptr);
+
+	if (color_type != PNG_COLOR_TYPE_GRAY && color_type != PNG_COLOR_TYPE_PALETTE)
+		FATAL_ERROR("\"%s\" has an unsupported color type.\n", path);
+
+	// Check if the image has a palette so that we can tell if the colors need to be inverted later.
+	// Don't read the palette because it's not needed for now.
+	image->hasPalette = (color_type == PNG_COLOR_TYPE_PALETTE);
+
+	image->width = png_get_image_width(png_ptr, info_ptr);
+	image->height = png_get_image_height(png_ptr, info_ptr);
+
+	int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+	image->pixels = malloc(image->height * rowbytes);
+
+	if (image->pixels == NULL)
+		FATAL_ERROR("Failed to allocate pixel buffer.\n");
+
+	png_bytepp row_pointers = malloc(image->height * sizeof(png_bytep));
+
+	if (row_pointers == NULL)
+		FATAL_ERROR("Failed to allocate row pointers.\n");
+
+	for (int i = 0; i < image->height; i++)
+		row_pointers[i] = (png_bytep)(image->pixels + (i * rowbytes));
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Error reading from \"%s\".\n", path);
+
+	png_read_image(png_ptr, row_pointers);
+
+	png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+	free(row_pointers);
+	fclose(fp);
+}
+
+void SetPngPalette(png_structp png_ptr, png_infop info_ptr, struct Palette *palette)
+{
+	png_colorp colors = malloc(palette->numColors * sizeof(png_color));
+
+	if (colors == NULL)
+		FATAL_ERROR("Failed to allocate PNG palette.\n");
+
+	for (int i = 0; i < palette->numColors; i++) {
+		colors[i].red = palette->colors[i].red;
+		colors[i].green = palette->colors[i].green;
+		colors[i].blue = palette->colors[i].blue;
+	}
+
+	png_set_PLTE(png_ptr, info_ptr, colors, palette->numColors);
+
+	free(colors);
+}
+
+void WritePng(char *path, struct Image *image)
+{
+	FILE *fp = fopen(path, "wb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
+
+	png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+	if (!png_ptr)
+		FATAL_ERROR("Failed to create PNG write struct.\n");
+
+	png_infop info_ptr = png_create_info_struct(png_ptr);
+
+	if (!info_ptr)
+		FATAL_ERROR("Failed to create PNG info struct.\n");
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Failed to init I/O for writing \"%s\".\n", path);
+
+	png_init_io(png_ptr, fp);
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Error writing header for \"%s\".\n", path);
+
+	int color_type = image->hasPalette ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_GRAY;
+
+	png_set_IHDR(png_ptr, info_ptr, image->width, image->height,
+		image->bitDepth, color_type, PNG_INTERLACE_NONE,
+		PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+
+	if (image->hasPalette) {
+		SetPngPalette(png_ptr, info_ptr, &image->palette);
+
+		if (image->hasTransparency) {
+			png_byte trans = 0;
+			png_set_tRNS(png_ptr, info_ptr, &trans, 1, 0);
+		}
+	}
+
+	png_write_info(png_ptr, info_ptr);
+
+	png_bytepp row_pointers = malloc(image->height * sizeof(png_bytep));
+
+	if (row_pointers == NULL)
+		FATAL_ERROR("Failed to allocate row pointers.\n");
+
+	int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+	for (int i = 0; i < image->height; i++)
+		row_pointers[i] = (png_bytep)(image->pixels + (i * rowbytes));
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Error writing \"%s\".\n", path);
+
+	png_write_image(png_ptr, row_pointers);
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		FATAL_ERROR("Error ending write of \"%s\".\n", path);
+
+	png_write_end(png_ptr, NULL);
+
+	fclose(fp);
+
+	png_destroy_write_struct(&png_ptr, &info_ptr);
+	free(row_pointers);
+}
diff --git a/tools/rsfont/convert_png.h b/tools/rsfont/convert_png.h
new file mode 100644
index 000000000..55d3d6942
--- /dev/null
+++ b/tools/rsfont/convert_png.h
@@ -0,0 +1,11 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef CONVERT_PNG_H
+#define CONVERT_PNG_H
+
+#include "gfx.h"
+
+void ReadPng(char *path, struct Image *image);
+void WritePng(char *path, struct Image *image);
+
+#endif // CONVERT_PNG_H
diff --git a/tools/rsfont/font.c b/tools/rsfont/font.c
new file mode 100644
index 000000000..ed48b31e6
--- /dev/null
+++ b/tools/rsfont/font.c
@@ -0,0 +1,455 @@
+// Copyright(c) 2015-2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "global.h"
+#include "font.h"
+#include "gfx.h"
+#include "util.h"
+
+unsigned char gFontPalette[][3] =
+{
+    {0xFF, 0xFF, 0xFF}, // bg (white)
+    {0x38, 0x38, 0x38}, // fg (dark grey)
+    {0xD8, 0xD8, 0xD8}, // shadow (light grey)
+};
+
+void ConvertFromTiles1Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
+{
+    for (int glyph = 0; glyph < numGlyphs; glyph++)
+    {
+        if (layout == 0)
+        {
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t srcRow = src[(glyph * 8) + i];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 8) + i;
+                    dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
+                }
+            }
+        }
+        else
+        {
+            // layout type 1
+
+            int tile1Offset = glyph * 16;
+            int tile2Offset = tile1Offset + 8;
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t srcRow = src[tile1Offset + i];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + i;
+                    dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
+                }
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t srcRow = src[tile2Offset + i];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + 8 + i;
+                    dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
+                }
+            }
+        }
+    }
+}
+
+void ConvertToTiles1Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
+{
+    for (int glyph = 0; glyph < numGlyphs; glyph++)
+    {
+        if (layout == 0)
+        {
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 8) + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 1)
+                        FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
+
+                    destRow <<= 1;
+                    destRow |= color;
+                }
+
+                dest[(glyph * 8) + i] = destRow;
+            }
+        }
+        else
+        {
+            // layout type 1
+
+            int tile1Offset = glyph * 16;
+            int tile2Offset = tile1Offset + 8;
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 1)
+                        FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
+
+                    destRow <<= 1;
+                    destRow |= color;
+                }
+
+                dest[tile1Offset + i] = destRow;
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint8_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + 8 + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 1)
+                        FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
+
+                    destRow <<= 1;
+                    destRow |= color;
+                }
+
+                dest[tile2Offset + i] = destRow;
+            }
+        }
+    }
+}
+
+void ConvertFromTiles4Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
+{
+    static unsigned char table[16] =
+    {
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1,
+    };
+
+    for (int glyph = 0; glyph < numGlyphs; glyph++)
+    {
+        if (layout == 0)
+        {
+            int offset = glyph * 32;
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t srcRow = (src[offset + 3] << 24)
+                    | (src[offset + 2] << 16)
+                    | (src[offset + 1] << 8)
+                    | src[offset];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 8) + i;
+                    dest[(y * 128) + x] = table[srcRow & 0xF];
+                    srcRow >>= 4;
+                }
+
+                offset += 4;
+            }
+        }
+        else
+        {
+            int tile1Offset;
+            int tile2Offset;
+
+            if (layout == 1)
+            {
+                tile1Offset = glyph * 64;
+                tile2Offset = tile1Offset + 32;
+            }
+            else
+            {
+                tile1Offset = ((glyph / 16) * 1024) + ((glyph % 16) * 32);
+                tile2Offset = tile1Offset + 512;
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t srcRow = (src[tile1Offset + 3] << 24)
+                    | (src[tile1Offset + 2] << 16)
+                    | (src[tile1Offset + 1] << 8)
+                    | src[tile1Offset];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + i;
+                    dest[(y * 128) + x] = table[srcRow & 0xF];
+                    srcRow >>= 4;
+                }
+
+                tile1Offset += 4;
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t srcRow = (src[tile2Offset + 3] << 24)
+                    | (src[tile2Offset + 2] << 16)
+                    | (src[tile2Offset + 1] << 8)
+                    | src[tile2Offset];
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + 8 + i;
+                    dest[(y * 128) + x] = table[srcRow & 0xF];
+                    srcRow >>= 4;
+                }
+
+                tile2Offset += 4;
+            }
+        }
+    }
+}
+
+void ConvertToTiles4Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
+{
+    static unsigned char table[3] =
+    {
+        0, 15, 14,
+    };
+
+    for (int glyph = 0; glyph < numGlyphs; glyph++)
+    {
+        if (layout == 0)
+        {
+            int offset = glyph * 32;
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 8) + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 2)
+                        FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
+
+                    destRow >>= 4;
+                    destRow |= (table[color] << 28);
+                }
+
+                dest[offset] = destRow & 0xFF;
+                dest[offset + 1] = (destRow >> 8) & 0xFF;
+                dest[offset + 2] = (destRow >> 16) & 0xFF;
+                dest[offset + 3] = (destRow >> 24) & 0xFF;
+
+                offset += 4;
+            }
+        }
+        else
+        {
+            int tile1Offset;
+            int tile2Offset;
+
+            if (layout == 1)
+            {
+                tile1Offset = glyph * 64;
+                tile2Offset = tile1Offset + 32;
+            }
+            else
+            {
+                tile1Offset = ((glyph / 16) * 1024) + ((glyph % 16) * 32);
+                tile2Offset = tile1Offset + 512;
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 2)
+                        FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
+
+                    destRow >>= 4;
+                    destRow |= (table[color] << 28);
+                }
+
+                dest[tile1Offset] = destRow & 0xFF;
+                dest[tile1Offset + 1] = (destRow >> 8) & 0xFF;
+                dest[tile1Offset + 2] = (destRow >> 16) & 0xFF;
+                dest[tile1Offset + 3] = (destRow >> 24) & 0xFF;
+
+                tile1Offset += 4;
+            }
+
+            for (int i = 0; i < 8; i++)
+            {
+                uint32_t destRow = 0;
+
+                for (int j = 0; j < 8; j++)
+                {
+                    int x = ((glyph % 16) * 8) + j;
+                    int y = ((glyph / 16) * 16) + 8 + i;
+                    unsigned char color = src[(y * 128) + x];
+
+                    if (color > 2)
+                        FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
+
+                    destRow >>= 4;
+                    destRow |= (table[color] << 28);
+                }
+
+                dest[tile2Offset] = destRow & 0xFF;
+                dest[tile2Offset + 1] = (destRow >> 8) & 0xFF;
+                dest[tile2Offset + 2] = (destRow >> 16) & 0xFF;
+                dest[tile2Offset + 3] = (destRow >> 24) & 0xFF;
+
+                tile2Offset += 4;
+            }
+        }
+    }
+}
+
+static void SetFontPalette(struct Image *image)
+{
+    image->hasPalette = true;
+
+    image->palette.numColors = 3;
+
+    for (int i = 0; i < image->palette.numColors; i++)
+    {
+        image->palette.colors[i].red = gFontPalette[i][0];
+        image->palette.colors[i].green = gFontPalette[i][1];
+        image->palette.colors[i].blue = gFontPalette[i][2];
+    }
+
+    image->hasTransparency = false;
+}
+
+int CalcFileSize(int numGlyphs, int bpp, int layout)
+{
+    if (layout == 2)
+    {
+        // assume 4 BPP
+        int numFullRows = numGlyphs / 16;
+        int remainder = numGlyphs % 16;
+        int fullRowsSize = numFullRows * 1024;
+        int remainderSize = 0;
+
+        if (remainder != 0)
+            remainderSize = 1024 - (16 - remainder) * 32;
+
+        return fullRowsSize + remainderSize;
+    }
+    else
+    {
+        int tilesPerGlyph = layout > 0 ? 2 : 1;
+        int bytesPerTile = 8 * bpp;
+        return numGlyphs * tilesPerGlyph * bytesPerTile;
+    }
+}
+
+void ReadFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout)
+{
+    int fileSize;
+    unsigned char *buffer = ReadWholeFile(path, &fileSize);
+
+    int expectedFileSize = CalcFileSize(numGlyphs, bpp, layout);
+
+    if (fileSize != expectedFileSize)
+        FATAL_ERROR("The file size is %d but should be %d.\n", fileSize, expectedFileSize);
+
+    int numRows = (numGlyphs + 15) / 16;
+    int rowHeight = layout > 0 ? 16 : 8;
+
+    image->width = 128;
+    image->height = numRows * rowHeight;
+    image->bitDepth = 8;
+    image->pixels = calloc(image->width * image->height, 1);
+
+    if (image->pixels == NULL)
+        FATAL_ERROR("Failed to allocate memory for font.\n");
+
+    if (bpp == 1)
+        ConvertFromTiles1Bpp(buffer, image->pixels, numGlyphs, layout);
+    else
+        ConvertFromTiles4Bpp(buffer, image->pixels, numGlyphs, layout);
+
+    free(buffer);
+
+    SetFontPalette(image);
+}
+
+void WriteFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout)
+{
+    if (image->width != 128)
+        FATAL_ERROR("The width of the font image (%d) is not 128.\n", image->width);
+
+    int numRows = (numGlyphs + 15) / 16;
+    int rowHeight = layout > 0 ? 16 : 8;
+    int expectedHeight = numRows * rowHeight;
+
+    if (image->height < expectedHeight)
+        FATAL_ERROR("The height of the font image (%d) is less than %d.\n", image->height, expectedHeight);
+
+    int fileSize = CalcFileSize(numGlyphs, bpp, layout);
+
+    unsigned char *buffer = calloc(fileSize, 1);
+
+    if (buffer == NULL)
+        FATAL_ERROR("Failed to allocate memory for font.\n");
+
+    if (bpp == 1)
+        ConvertToTiles1Bpp(image->pixels, buffer, numGlyphs, layout);
+    else
+        ConvertToTiles4Bpp(image->pixels, buffer, numGlyphs, layout);
+
+    WriteWholeFile(path, buffer, fileSize);
+
+    free(buffer);
+}
diff --git a/tools/rsfont/font.h b/tools/rsfont/font.h
new file mode 100644
index 000000000..1cd48757f
--- /dev/null
+++ b/tools/rsfont/font.h
@@ -0,0 +1,30 @@
+// Copyright(c) 2015-2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef FONT_H
+#define FONT_H
+
+#include <stdbool.h>
+#include "gfx.h"
+
+void ReadFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout);
+void WriteFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout);
+
+#endif // FONT_H
diff --git a/tools/rsfont/gfx.h b/tools/rsfont/gfx.h
new file mode 100644
index 000000000..04a3d80c7
--- /dev/null
+++ b/tools/rsfont/gfx.h
@@ -0,0 +1,50 @@
+// Copyright(c) 2015-2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef GFX_H
+#define GFX_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct Color
+{
+	unsigned char red;
+	unsigned char green;
+	unsigned char blue;
+};
+
+struct Palette
+{
+	struct Color colors[256];
+	int numColors;
+};
+
+struct Image {
+	int width;
+	int height;
+	int bitDepth;
+	unsigned char *pixels;
+	bool hasPalette;
+	struct Palette palette;
+	bool hasTransparency;
+};
+
+#endif // GFX_H
diff --git a/tools/rsfont/global.h b/tools/rsfont/global.h
new file mode 100644
index 000000000..65dd351d2
--- /dev/null
+++ b/tools/rsfont/global.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef GLOBAL_H
+#define GLOBAL_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef _MSC_VER
+
+#define FATAL_ERROR(format, ...)          \
+do {                                      \
+    fprintf(stderr, format, __VA_ARGS__); \
+    exit(1);                              \
+} while (0)
+
+#define UNUSED
+
+#else
+
+#define FATAL_ERROR(format, ...)            \
+do {                                        \
+    fprintf(stderr, format, ##__VA_ARGS__); \
+    exit(1);                                \
+} while (0)
+
+#define UNUSED __attribute__((__unused__))
+
+#endif // _MSC_VER
+
+#endif // GLOBAL_H
diff --git a/tools/rsfont/main.c b/tools/rsfont/main.c
new file mode 100644
index 000000000..2f5d9d971
--- /dev/null
+++ b/tools/rsfont/main.c
@@ -0,0 +1,93 @@
+// Copyright(c) 2015-2016 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include "global.h"
+#include "util.h"
+#include "gfx.h"
+#include "convert_png.h"
+#include "font.h"
+
+int ExtensionToBpp(const char *extension)
+{
+    if (!strcmp(extension, "1bpp"))
+        return 1;
+    else if (!strcmp(extension, "4bpp"))
+        return 4;
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+	if (argc < 5)
+		FATAL_ERROR("Usage: rsfont INPUT_FILE OUTPUT_FILE NUM_GLYPHS LAYOUT_TYPE\n");
+
+	char *inputPath = argv[1];
+	char *outputPath = argv[2];
+	char *inputFileExtension = GetFileExtension(inputPath);
+	char *outputFileExtension = GetFileExtension(outputPath);
+
+	if (inputFileExtension == NULL)
+		FATAL_ERROR("Input file \"%s\" has no extension.\n", inputPath);
+
+	if (outputFileExtension == NULL)
+		FATAL_ERROR("Output file \"%s\" has no extension.\n", outputPath);
+
+    int numGlyphs;
+    int bpp;
+    int layout;
+
+    if (!ParseNumber(argv[3], NULL, 10, &numGlyphs))
+        FATAL_ERROR("Failed to parse number of glyphs.\n");
+
+    if (!ParseNumber(argv[4], NULL, 10, &layout))
+        FATAL_ERROR("Failed to parse layout type.\n");
+
+    if (layout < 0 || layout > 2)
+        FATAL_ERROR("Layout type %d is invalid. Layout type must be 0, 1, or 2.\n", layout);
+
+    bool toPng;
+
+    if (!strcmp(inputFileExtension, "png") && (bpp = ExtensionToBpp(outputFileExtension)) != 0)
+        toPng = false;
+    else if ((bpp = ExtensionToBpp(inputFileExtension)) != 0 && !strcmp(outputFileExtension, "png"))
+        toPng = true;
+    else
+        FATAL_ERROR("Don't know how to convert \"%s\" to \"%s\".\n", inputPath, outputPath);
+
+    if (bpp == 1 && layout == 2)
+        FATAL_ERROR("Layout type 2 is not supported with 1 BPP fonts.\n");
+
+    struct Image image;
+
+    if (toPng)
+    {
+        ReadFont(inputPath, &image, numGlyphs, bpp, layout);
+        WritePng(outputPath, &image);
+    }
+    else
+    {
+        image.bitDepth = 8;
+        ReadPng(inputPath, &image);
+        WriteFont(outputPath, &image, numGlyphs, bpp, layout);
+    }
+}
diff --git a/tools/rsfont/util.c b/tools/rsfont/util.c
new file mode 100644
index 000000000..87abeb31c
--- /dev/null
+++ b/tools/rsfont/util.c
@@ -0,0 +1,124 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <limits.h>
+#include "global.h"
+#include "util.h"
+
+bool ParseNumber(char *s, char **end, int radix, int *intValue)
+{
+	char *localEnd;
+
+	if (end == NULL)
+		end = &localEnd;
+
+	errno = 0;
+
+	const long longValue = strtol(s, end, radix);
+
+	if (*end == s)
+		return false; // not a number
+
+	if ((longValue == LONG_MIN || longValue == LONG_MAX) && errno == ERANGE)
+		return false;
+
+	if (longValue > INT_MAX)
+		return false;
+
+	if (longValue < INT_MIN)
+		return false;
+
+	*intValue = (int)longValue;
+
+	return true;
+}
+
+char *GetFileExtension(char *path)
+{
+	char *extension = path;
+
+	while (*extension != 0)
+		extension++;
+
+	while (extension > path && *extension != '.')
+		extension--;
+
+	if (extension == path)
+		return NULL;
+
+	extension++;
+
+	if (*extension == 0)
+		return NULL;
+
+	return extension;
+}
+
+unsigned char *ReadWholeFile(char *path, int *size)
+{
+	FILE *fp = fopen(path, "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+	fseek(fp, 0, SEEK_END);
+
+	*size = ftell(fp);
+
+	unsigned char *buffer = malloc(*size);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
+
+	rewind(fp);
+
+	if (fread(buffer, *size, 1, fp) != 1)
+		FATAL_ERROR("Failed to read \"%s\".\n", path);
+
+	fclose(fp);
+
+	return buffer;
+}
+
+unsigned char *ReadWholeFileZeroPadded(char *path, int *size, int padAmount)
+{
+	FILE *fp = fopen(path, "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
+
+	fseek(fp, 0, SEEK_END);
+
+	*size = ftell(fp);
+
+	unsigned char *buffer = calloc(*size + padAmount, 1);
+
+	if (buffer == NULL)
+		FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
+
+	rewind(fp);
+
+	if (fread(buffer, *size, 1, fp) != 1)
+		FATAL_ERROR("Failed to read \"%s\".\n", path);
+
+	fclose(fp);
+
+	return buffer;
+}
+
+void WriteWholeFile(char *path, void *buffer, int bufferSize)
+{
+	FILE *fp = fopen(path, "wb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
+
+	if (fwrite(buffer, bufferSize, 1, fp) != 1)
+		FATAL_ERROR("Failed to write to \"%s\".\n", path);
+
+	fclose(fp);
+}
diff --git a/tools/rsfont/util.h b/tools/rsfont/util.h
new file mode 100644
index 000000000..6d7a9c21e
--- /dev/null
+++ b/tools/rsfont/util.h
@@ -0,0 +1,14 @@
+// Copyright (c) 2015 YamaArashi
+
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdbool.h>
+
+bool ParseNumber(char *s, char **end, int radix, int *intValue);
+char *GetFileExtension(char *path);
+unsigned char *ReadWholeFile(char *path, int *size);
+unsigned char *ReadWholeFileZeroPadded(char *path, int *size, int padAmount);
+void WriteWholeFile(char *path, void *buffer, int bufferSize);
+
+#endif // UTIL_H
diff --git a/tools/scaninc/.gitignore b/tools/scaninc/.gitignore
new file mode 100644
index 000000000..94bfbf989
--- /dev/null
+++ b/tools/scaninc/.gitignore
@@ -0,0 +1 @@
+scaninc
diff --git a/tools/scaninc/LICENSE b/tools/scaninc/LICENSE
new file mode 100644
index 000000000..b66bf81c0
--- /dev/null
+++ b/tools/scaninc/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 YamaArashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/tools/scaninc/Makefile b/tools/scaninc/Makefile
new file mode 100644
index 000000000..3e1c031a8
--- /dev/null
+++ b/tools/scaninc/Makefile
@@ -0,0 +1,15 @@
+CXX = g++
+
+CXXFLAGS = -Wall -Werror -std=c++11 -O2 -s
+
+SRCS = scaninc.cpp c_file.cpp asm_file.cpp
+
+HEADERS := scaninc.h asm_file.h c_file.h
+
+.PHONY: clean
+
+scaninc: $(SRCS) $(HEADERS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) scaninc scaninc.exe
diff --git a/tools/scaninc/asm_file.cpp b/tools/scaninc/asm_file.cpp
new file mode 100644
index 000000000..6322749e2
--- /dev/null
+++ b/tools/scaninc/asm_file.cpp
@@ -0,0 +1,191 @@
+// Copyright(c) 2015-2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <string>
+#include "scaninc.h"
+#include "asm_file.h"
+
+AsmFile::AsmFile(std::string path)
+{
+    m_path = path;
+
+    FILE *fp = std::fopen(path.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", path.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    m_buffer = new char[m_size];
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", path.c_str());
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+}
+
+AsmFile::~AsmFile()
+{
+    delete[] m_buffer;
+}
+
+IncDirectiveType AsmFile::ReadUntilIncDirective(std::string &path)
+{
+    // At the beginning of each loop iteration, the current file position
+    // should be at the start of a line or at the end of the file.
+    for (;;)
+    {
+        SkipTabsAndSpaces();
+
+        IncDirectiveType incDirectiveType = IncDirectiveType::None;
+
+        if (PeekChar() == '.')
+        {
+            m_pos++;
+
+            if (MatchIncDirective("incbin", path))
+                incDirectiveType = IncDirectiveType::Incbin;
+            else if (MatchIncDirective("include", path))
+                incDirectiveType = IncDirectiveType::Include;
+        }
+
+        for (;;)
+        {
+            int c = GetChar();
+
+            if (c == -1)
+                return incDirectiveType;
+
+            if (c == ';')
+            {
+                SkipEndOfLineComment();
+                break;
+            }
+            else if (c == '/' && PeekChar() == '*')
+            {
+                m_pos++;
+                SkipMultiLineComment();
+            }
+            else if (c == '"')
+            {
+                SkipString();
+            }
+            else if (c == '\n')
+            {
+                break;
+            }
+        }
+
+        if (incDirectiveType != IncDirectiveType::None)
+            return incDirectiveType;
+    }
+}
+
+std::string AsmFile::ReadPath()
+{
+    int length = 0;
+    int startPos = m_pos;
+
+    for (;;)
+    {
+        int c = GetChar();
+
+        if (c == '"')
+            break;
+
+        if (c == -1)
+            FATAL_INPUT_ERROR("unexpected EOF in include string\n");
+
+        if (c == 0)
+            FATAL_INPUT_ERROR("unexpected NUL character in include string\n");
+
+        if (c == '\n')
+            FATAL_INPUT_ERROR("unexpected end of line character in include string\n");
+
+        // Don't bother allowing any escape sequences.
+        if (c == '\\')
+            FATAL_INPUT_ERROR("unexpected escape in include string\n");
+
+        length++;
+
+        if (length > SCANINC_MAX_PATH)
+            FATAL_INPUT_ERROR("path is too long");
+    }
+
+    return std::string(m_buffer + startPos, length);
+}
+
+void AsmFile::SkipEndOfLineComment()
+{
+    int c;
+
+    do
+    {
+        c = GetChar();
+    } while (c != -1 && c != '\n');
+}
+
+void AsmFile::SkipMultiLineComment()
+{
+    for (;;)
+    {
+        int c = GetChar();
+
+        if (c == '*')
+        {
+            if (PeekChar() == '/')
+            {
+                m_pos++;
+                return;
+            }
+        }
+        else if (c == -1)
+        {
+            return;
+        }
+    }
+}
+
+void AsmFile::SkipString()
+{
+    for (;;)
+    {
+        int c = GetChar();
+
+        if (c == '"')
+            break;
+
+        if (c == -1)
+            FATAL_INPUT_ERROR("unexpected EOF in string\n");
+
+        if (c == '\\')
+        {
+            c = GetChar();
+        }
+    }
+}
diff --git a/tools/scaninc/asm_file.h b/tools/scaninc/asm_file.h
new file mode 100644
index 000000000..ad99b757e
--- /dev/null
+++ b/tools/scaninc/asm_file.h
@@ -0,0 +1,119 @@
+// Copyright(c) 2015-2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef ASM_FILE_H
+#define ASM_FILE_H
+
+#include <string>
+#include "scaninc.h"
+
+enum class IncDirectiveType
+{
+    None,
+    Include,
+    Incbin
+};
+
+class AsmFile
+{
+public:
+    AsmFile(std::string path);
+    ~AsmFile();
+    IncDirectiveType ReadUntilIncDirective(std::string& path);
+
+private:
+    char *m_buffer;
+    int m_pos;
+    int m_size;
+    int m_lineNum;
+    std::string m_path;
+
+    int GetChar()
+    {
+        if (m_pos >= m_size)
+            return -1;
+
+        int c = m_buffer[m_pos++];
+
+        if (c == '\r')
+        {
+            if (m_pos < m_size && m_buffer[m_pos++] == '\n')
+            {
+                m_lineNum++;
+                return '\n';
+            }
+            else
+            {
+                FATAL_INPUT_ERROR("CR line endings are not supported\n");
+            }
+        }
+
+        if (c == '\n')
+            m_lineNum++;
+
+        return c;
+    }
+
+    // No newline translation because it's not needed for any use of this function.
+    int PeekChar()
+    {
+        if (m_pos >= m_size)
+            return -1;
+
+        return m_buffer[m_pos];
+    }
+
+    void SkipTabsAndSpaces()
+    {
+        while (m_pos < m_size && (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' '))
+            m_pos++;
+    }
+
+    bool MatchIncDirective(std::string directiveName, std::string& path)
+    {
+        int length = directiveName.length();
+        int i;
+
+        for (i = 0; i < length && m_pos + i < m_size; i++)
+            if (directiveName[i] != m_buffer[m_pos + i])
+                return false;
+
+        if (i < length)
+            return false;
+
+        m_pos += length;
+
+        SkipTabsAndSpaces();
+
+        if (GetChar() != '"')
+            FATAL_INPUT_ERROR("no path after \".%s\" directive\n", directiveName.c_str());
+
+        path = ReadPath();
+
+        return true;
+    }
+
+    std::string ReadPath();
+    void SkipEndOfLineComment();
+    void SkipMultiLineComment();
+    void SkipString();
+};
+
+#endif // ASM_FILE_H
diff --git a/tools/scaninc/c_file.cpp b/tools/scaninc/c_file.cpp
new file mode 100644
index 000000000..f7acc833f
--- /dev/null
+++ b/tools/scaninc/c_file.cpp
@@ -0,0 +1,298 @@
+// Copyright(c) 2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include "c_file.h"
+
+CFile::CFile(std::string path)
+{
+    m_path = path;
+
+    FILE *fp = std::fopen(path.c_str(), "rb");
+
+    if (fp == NULL)
+        FATAL_ERROR("Failed to open \"%s\" for reading.\n", path.c_str());
+
+    std::fseek(fp, 0, SEEK_END);
+
+    m_size = std::ftell(fp);
+
+    m_buffer = new char[m_size + 1];
+    m_buffer[m_size] = 0;
+
+    std::rewind(fp);
+
+    if (std::fread(m_buffer, m_size, 1, fp) != 1)
+        FATAL_ERROR("Failed to read \"%s\".\n", path.c_str());
+
+    std::fclose(fp);
+
+    m_pos = 0;
+    m_lineNum = 1;
+}
+
+CFile::~CFile()
+{
+    delete[] m_buffer;
+}
+
+void CFile::FindIncbins()
+{
+    char stringChar = 0;
+
+    while (m_pos < m_size)
+    {
+        if (stringChar)
+        {
+            if (m_buffer[m_pos] == stringChar)
+            {
+                m_pos++;
+                stringChar = 0;
+            }
+            else if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == stringChar)
+            {
+                m_pos += 2;
+            }
+            else
+            {
+                if (m_buffer[m_pos] == '\n')
+                    m_lineNum++;
+                m_pos++;
+            }
+        }
+        else
+        {
+            SkipWhitespace();
+            CheckInclude();
+            CheckIncbin();
+
+            if (m_pos >= m_size)
+                break;
+
+            char c = m_buffer[m_pos++];
+
+            if (c == '\n')
+                m_lineNum++;
+            else if (c == '"')
+                stringChar = '"';
+            else if (c == '\'')
+                stringChar = '\'';
+            else if (c == 0)
+                FATAL_INPUT_ERROR("unexpected null character");
+        }
+    }
+}
+
+bool CFile::ConsumeHorizontalWhitespace()
+{
+    if (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
+    {
+        m_pos++;
+        return true;
+    }
+
+    return false;
+}
+
+bool CFile::ConsumeNewline()
+{
+    if (m_buffer[m_pos] == '\n')
+    {
+        m_pos++;
+        m_lineNum++;
+        return true;
+    }
+
+    if (m_buffer[m_pos] == '\r' && m_buffer[m_pos + 1] == '\n')
+    {
+        m_pos += 2;
+        m_lineNum++;
+        return true;
+    }
+
+    return false;
+}
+
+bool CFile::ConsumeComment()
+{
+    if (m_buffer[m_pos] == '/' && m_buffer[m_pos + 1] == '*')
+    {
+        m_pos += 2;
+        while (m_buffer[m_pos] != '*' && m_buffer[m_pos + 1] != '/')
+        {
+            if (m_buffer[m_pos] == 0)
+                return false;
+            if (!ConsumeNewline())
+                m_pos++;
+        }
+        m_pos += 2;
+        return true;
+    }
+    else if (m_buffer[m_pos] == '/' && m_buffer[m_pos + 1] == '/')
+    {
+        m_pos += 2;
+        while (!ConsumeNewline())
+        {
+            if (m_buffer[m_pos] == 0)
+                return false;
+            m_pos++;
+        }
+        return true;
+    }
+
+    return false;
+}
+
+void CFile::SkipWhitespace()
+{
+    while (ConsumeHorizontalWhitespace() || ConsumeNewline() || ConsumeComment())
+        ;
+}
+
+bool CFile::CheckIdentifier(const std::string& ident)
+{
+    unsigned int i;
+
+    for (i = 0; i < ident.length() && m_pos + i < (unsigned)m_size; i++)
+        if (ident[i] != m_buffer[m_pos + i])
+            return false;
+
+    return (i == ident.length());
+}
+
+void CFile::CheckInclude()
+{
+    if (m_buffer[m_pos] != '#')
+        return;
+
+    std::string ident = "#include";
+
+    if (!CheckIdentifier(ident))
+    {
+        return;
+    }
+
+    m_pos += ident.length();
+
+    ConsumeHorizontalWhitespace();
+
+    std::string path = ReadPath();
+
+    if (!path.empty()) {
+        m_includes.emplace(path);
+    }
+}
+
+void CFile::CheckIncbin()
+{
+    // Optimization: assume most lines are not incbins
+    if (!(m_buffer[m_pos+0] == 'I'
+       && m_buffer[m_pos+1] == 'N'
+       && m_buffer[m_pos+2] == 'C'
+       && m_buffer[m_pos+3] == 'B'
+       && m_buffer[m_pos+4] == 'I'
+       && m_buffer[m_pos+5] == 'N'
+       && m_buffer[m_pos+6] == '_'))
+    {
+            return;
+    }
+
+    std::string idents[6] = { "INCBIN_S8", "INCBIN_U8", "INCBIN_S16", "INCBIN_U16", "INCBIN_S32", "INCBIN_U32" };
+    int incbinType = -1;
+
+    for (int i = 0; i < 6; i++)
+    {
+        if (CheckIdentifier(idents[i]))
+        {
+            incbinType = i;
+            break;
+        }
+    }
+
+    if (incbinType == -1)
+        return;
+
+    long oldPos = m_pos;
+    long oldLineNum = m_lineNum;
+
+    m_pos += idents[incbinType].length();
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != '(')
+    {
+        m_pos = oldPos;
+        m_lineNum = oldLineNum;
+        return;
+    }
+
+    m_pos++;
+
+    SkipWhitespace();
+
+    std::string path = ReadPath();
+
+    SkipWhitespace();
+
+    if (m_buffer[m_pos] != ')')
+        FATAL_INPUT_ERROR("expected ')'");
+
+    m_pos++;
+
+    m_incbins.emplace(path);
+}
+
+std::string CFile::ReadPath()
+{
+    if (m_buffer[m_pos] != '"')
+    {
+        if (m_buffer[m_pos] == '<')
+        {
+            return std::string();
+        }
+        FATAL_INPUT_ERROR("expected '\"' or '<'");
+    }
+
+    m_pos++;
+
+    int startPos = m_pos;
+
+    while (m_buffer[m_pos] != '"')
+    {
+        if (m_buffer[m_pos] == 0)
+        {
+            if (m_pos >= m_size)
+                FATAL_INPUT_ERROR("unexpected EOF in path string");
+            else
+                FATAL_INPUT_ERROR("unexpected null character in path string");
+        }
+
+        if (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n')
+            FATAL_INPUT_ERROR("unexpected end of line character in path string");
+
+        if (m_buffer[m_pos] == '\\')
+            FATAL_INPUT_ERROR("unexpected escape in path string");
+
+        m_pos++;
+    }
+
+    m_pos++;
+
+    return std::string(m_buffer + startPos, m_pos - 1 - startPos);
+}
diff --git a/tools/scaninc/c_file.h b/tools/scaninc/c_file.h
new file mode 100644
index 000000000..618901b85
--- /dev/null
+++ b/tools/scaninc/c_file.h
@@ -0,0 +1,57 @@
+// Copyright(c) 2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef C_FILE_H
+#define C_FILE_H
+
+#include <string>
+#include <set>
+#include <memory>
+#include "scaninc.h"
+
+class CFile
+{
+public:
+    CFile(std::string path);
+    ~CFile();
+    void FindIncbins();
+    const std::set<std::string>& GetIncbins() { return m_incbins; }
+    const std::set<std::string>& GetIncludes() { return m_includes; }
+
+private:
+    char *m_buffer;
+    int m_pos;
+    int m_size;
+    int m_lineNum;
+    std::string m_path;
+    std::set<std::string> m_incbins;
+    std::set<std::string> m_includes;
+
+    bool ConsumeHorizontalWhitespace();
+    bool ConsumeNewline();
+    bool ConsumeComment();
+    void SkipWhitespace();
+    bool CheckIdentifier(const std::string& ident);
+    void CheckInclude();
+    void CheckIncbin();
+    std::string ReadPath();
+};
+
+#endif // C_FILE_H
diff --git a/tools/scaninc/scaninc.cpp b/tools/scaninc/scaninc.cpp
new file mode 100644
index 000000000..3dc221479
--- /dev/null
+++ b/tools/scaninc/scaninc.cpp
@@ -0,0 +1,165 @@
+// Copyright(c) 2015-2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <cstdio>
+#include <cstdlib>
+#include <list>
+#include <queue>
+#include <set>
+#include <string>
+#include "scaninc.h"
+#include "asm_file.h"
+#include "c_file.h"
+
+bool CanOpenFile(std::string path)
+{
+    FILE *fp = std::fopen(path.c_str(), "rb");
+
+    if (fp == NULL)
+        return false;
+
+    std::fclose(fp);
+    return true;
+}
+
+const char *const USAGE = "Usage: scaninc [-I INCLUDE_PATH] FILE_PATH\n";
+
+int main(int argc, char **argv)
+{
+    std::queue<std::string> filesToProcess;
+    std::set<std::string> dependencies;
+
+    std::list<std::string> includeDirs;
+
+    argc--;
+    argv++;
+
+    while (argc > 1)
+    {
+        std::string arg(argv[0]);
+        if (arg.substr(0, 2) == "-I")
+        {
+            std::string includeDir = arg.substr(2);
+            if (includeDir.empty())
+            {
+                argc--;
+                argv++;
+                includeDir = std::string(argv[0]);
+            }
+            if (includeDir.back() != '/')
+            {
+                includeDir += '/';
+            }
+            includeDirs.push_back(includeDir);
+        }
+        else
+        {
+            FATAL_ERROR(USAGE);
+        }
+        argc--;
+        argv++;
+    }
+
+    if (argc != 1) {
+        FATAL_ERROR(USAGE);
+    }
+
+    std::string initialPath(argv[0]);
+
+    std::size_t pos = initialPath.find_last_of('.');
+
+    if (pos == std::string::npos)
+        FATAL_ERROR("no file extension in path \"%s\"\n", initialPath.c_str());
+
+    std::string extension = initialPath.substr(pos + 1);
+
+    std::string srcDir("");
+    std::size_t slash = initialPath.rfind('/');
+    if (slash != std::string::npos)
+    {
+        srcDir = initialPath.substr(0, slash + 1);
+    }
+    includeDirs.push_back(srcDir);
+
+    if (extension == "c" || extension == "h")
+    {
+        filesToProcess.push(initialPath);
+
+        while (!filesToProcess.empty())
+        {
+            CFile file(filesToProcess.front());
+            filesToProcess.pop();
+
+            file.FindIncbins();
+            for (auto incbin : file.GetIncbins())
+            {
+                dependencies.insert(incbin);
+            }
+            for (auto include : file.GetIncludes())
+            {
+                for (auto includeDir : includeDirs)
+                {
+                    std::string path(includeDir + include);
+                    if (CanOpenFile(path))
+                    {
+                        bool inserted = dependencies.insert(path).second;
+                        if (inserted)
+                        {
+                            filesToProcess.push(path);
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    else if (extension == "s" || extension == "inc")
+    {
+        filesToProcess.push(initialPath);
+
+        while (!filesToProcess.empty())
+        {
+            AsmFile file(filesToProcess.front());
+
+            filesToProcess.pop();
+
+            IncDirectiveType incDirectiveType;
+            std::string path;
+
+            while ((incDirectiveType = file.ReadUntilIncDirective(path)) != IncDirectiveType::None)
+            {
+                bool inserted = dependencies.insert(path).second;
+                if (inserted
+                    && incDirectiveType == IncDirectiveType::Include
+                    && CanOpenFile(path))
+                    filesToProcess.push(path);
+            }
+        }
+    }
+    else
+    {
+        FATAL_ERROR("unknown extension \"%s\"\n", extension.c_str());
+    }
+
+    for (const std::string &path : dependencies)
+    {
+        std::printf("%s\n", path.c_str());
+    }
+}
diff --git a/tools/scaninc/scaninc.h b/tools/scaninc/scaninc.h
new file mode 100644
index 000000000..30cc9611c
--- /dev/null
+++ b/tools/scaninc/scaninc.h
@@ -0,0 +1,59 @@
+// Copyright(c) 2015-2017 YamaArashi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef SCANINC_H
+#define SCANINC_H
+
+#include <cstdio>
+#include <cstdlib>
+
+#ifdef _MSC_VER
+
+#define FATAL_INPUT_ERROR(format, ...)                                        \
+do {                                                                          \
+    fprintf(stderr, "%s:%d " format, m_path.c_str(), m_lineNum, __VA_ARGS__); \
+    exit(1);                                                                  \
+} while (0)
+
+#define FATAL_ERROR(format, ...)          \
+do {                                      \
+    fprintf(stderr, format, __VA_ARGS__); \
+    exit(1);                              \
+} while (0)
+
+#else
+
+#define FATAL_INPUT_ERROR(format, ...)                                          \
+do {                                                                            \
+    fprintf(stderr, "%s:%d " format, m_path.c_str(), m_lineNum, ##__VA_ARGS__); \
+    exit(1);                                                                    \
+} while (0)
+
+#define FATAL_ERROR(format, ...)            \
+do {                                        \
+    fprintf(stderr, format, ##__VA_ARGS__); \
+    exit(1);                                \
+} while (0)
+
+#endif // _MSC_VER
+
+#define SCANINC_MAX_PATH 255
+
+#endif // SCANINC_H