pokemon graphics data and makefile

21 files changed, 2049 insertions, 0 deletions

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..e7f089445
--- /dev/null
+++ b/tools/gbagfx/Makefile
@@ -0,0 +1,15 @@
+CC = gcc
+
+CFLAGS = -Wall -Wextra -std=c11 -O2
+
+LIBS = -lz -lpng
+
+SRCS = main.c convert_png.c gfx.c jasc_pal.c lz.c util.c font.c
+
+.PHONY: clean
+
+gbagfx: $(SRCS) convert_png.h gfx.h global.h jasc_pal.h lz.h util.h font.h
+	$(CC) $(CFLAGS) $(SRCS) -o $@ $(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..f6a30804a
--- /dev/null
+++ b/tools/gbagfx/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/gbagfx/convert_png.h b/tools/gbagfx/convert_png.h
new file mode 100644
index 000000000..55d3d6942
--- /dev/null
+++ b/tools/gbagfx/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/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..02b6ed915
--- /dev/null
+++ b/tools/gbagfx/jasc_pal.c
@@ -0,0 +1,164 @@
+// 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)
+//
+// 16 or 256 times (depending on above line):
+// "<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");
+
+	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 != 16 && palette->numColors != 256)
+		FATAL_ERROR("%d is an invalid number of colors. The number of colors must be 16 or 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..7669dab9a
--- /dev/null
+++ b/tools/gbagfx/lz.c
@@ -0,0 +1,143 @@
+// 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)
+		return NULL;
+
+	int destSize = (src[3] << 16) | (src[2] << 8) | src[1];
+
+	unsigned char *dest = malloc(destSize);
+
+	if (dest == NULL)
+		return NULL;
+
+	int srcPos = 4;
+	int destPos = 0;
+
+	for (;;) {
+		if (srcPos >= srcSize)
+			return NULL;
+
+		unsigned char flags = src[srcPos++];
+
+		for (int i = 0; i < 8; i++) {
+			if (flags & 0x80) {
+				if (srcPos + 1 >= srcSize)
+					return NULL;
+
+				int blockSize = (src[srcPos] >> 4) + 3;
+				int blockDistance = (((src[srcPos] & 0xF) << 8) | src[srcPos + 1]) + 1;
+
+				srcPos += 2;
+
+				int blockPos = destPos - blockDistance;
+
+				if (destPos + blockSize > destSize || blockPos < 0)
+					return NULL;
+
+				for (int j = 0; j < blockSize; j++)
+					dest[destPos++] = dest[blockPos + j];
+			} else {
+				if (srcPos >= srcSize || destPos >= destSize)
+					return NULL;
+
+				dest[destPos++] = src[srcPos++];
+			}
+
+			if (destPos == destSize) {
+				*uncompressedSize = destSize;
+				return dest;
+			}
+
+			flags <<= 1;
+		}
+	}
+}
+
+unsigned char *LZCompress(unsigned char *src, int srcSize, int *compressedSize)
+{
+	const int minDistance = 2; // for compatibility with LZ77UnCompVram()
+
+	if (srcSize <= 0)
+		return NULL;
+
+	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)
+		return NULL;
+
+	// 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;
+			}
+		}
+	}
+}
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..065967a11
--- /dev/null
+++ b/tools/gbagfx/main.c
@@ -0,0 +1,307 @@
+// 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 "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;
+	bool hasPalette = false;
+	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];
+
+			hasPalette = true;
+		} 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, hasPalette ? paletteFilePath : NULL, 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 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 UNUSED, char **argv UNUSED)
+{
+	int fileSize;
+	unsigned char *buffer = ReadWholeFile(inputPath, &fileSize);
+
+	int compressedSize;
+	unsigned char *compressedData = LZCompress(buffer, fileSize, &compressedSize);
+
+	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);
+}
+
+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 },
+		{ "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, 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/util.c b/tools/gbagfx/util.c
new file mode 100644
index 000000000..5af380184
--- /dev/null
+++ b/tools/gbagfx/util.c
@@ -0,0 +1,98 @@
+// 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;
+}
+
+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..cb26a31ef
--- /dev/null
+++ b/tools/gbagfx/util.h
@@ -0,0 +1,13 @@
+// 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);
+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..0efe283f1
--- /dev/null
+++ b/tools/scaninc/Makefile
@@ -0,0 +1,13 @@
+CXX = g++
+
+CXXFLAGS = -Wall -std=c++11 -O2
+
+SRCS = scaninc.cpp
+
+.PHONY: clean
+
+scaninc: $(SRCS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@
+
+clean:
+	$(RM) scaninc scaninc.exe
diff --git a/tools/scaninc/scaninc.cpp b/tools/scaninc/scaninc.cpp
new file mode 100644
index 000000000..9a228180a
--- /dev/null
+++ b/tools/scaninc/scaninc.cpp
@@ -0,0 +1,320 @@
+// Copyright (c) 2015 YamaArashi
+
+#include <cstdio>
+#include <cstdlib>
+#include <stack>
+#include <set>
+#include <string>
+
+#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
+
+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();
+};
+
+AsmFile::AsmFile(std::string path)
+{
+	m_path = path;
+
+	FILE *fp = fopen(path.c_str(), "rb");
+
+	if (fp == NULL)
+		FATAL_ERROR("Failed to open \"%s\" for reading.\n", path.c_str());
+
+	fseek(fp, 0, SEEK_END);
+
+	m_size = ftell(fp);
+
+	m_buffer = new char[m_size];
+
+	rewind(fp);
+
+	if (fread(m_buffer, m_size, 1, fp) != 1)
+		FATAL_ERROR("Failed to read \"%s\".\n", path.c_str());
+
+	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");
+
+		if (c == '\\') {
+			c = GetChar();
+
+			if (c != '"')
+				FATAL_INPUT_ERROR("unknown escape \"\\%c\" in include string\n", c);
+		}
+
+		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();
+		}
+	}
+}
+
+bool CanOpenFile(std::string path)
+{
+	FILE *fp = fopen(path.c_str(), "rb");
+
+	if (fp == NULL)
+		return false;
+
+	fclose(fp);
+	return true;
+}
+
+int main(int argc, char **argv)
+{
+	if (argc < 2)
+		FATAL_ERROR("Usage: scaninc ASM_FILE_PATH\n");
+
+	std::stack<std::string> filesToProcess;
+	std::set<std::string> dependencies;
+
+	filesToProcess.push(std::string(argv[1]));
+
+	while (!filesToProcess.empty()) {
+		AsmFile file(filesToProcess.top());
+
+		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);
+		}
+	}
+
+	for (const std::string &path : dependencies) {
+		printf("%s\n", path.c_str());
+	}
+}