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-rw-r--r--tools/gbagfx/font.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/tools/gbagfx/font.c b/tools/gbagfx/font.c
new file mode 100644
index 0000000..0dd6fbc
--- /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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-05 19:53:47 +0000