Function Font_LoadFile

src/gui/font.c:59–115

* Load a font file. * * @param filename The name of the font file. * @return The pointer of the allocated memory where the file has been read. */

 * @return The pointer of the allocated memory where the file has been read.
 */
static Font *Font_LoadFile(const char *filename)
{
	uint8 *buf;
	Font *f;
	uint8 i;
	uint16 start;
	uint16 dataStart;
	uint16 widthList;
	uint16 lineList;

	if (!File_Exists(filename)) return NULL;

	buf = (uint8 *)File_ReadWholeFile(filename);

	if (buf[2] != 0x00 || buf[3] != 0x05) {
		free(buf);
		return NULL;
	}

	f = (Font *)calloc(1, sizeof(Font));
	start = READ_LE_UINT16(buf + 4);
	dataStart = READ_LE_UINT16(buf + 6);
	widthList = READ_LE_UINT16(buf + 8);
	lineList = READ_LE_UINT16(buf + 12);
	f->height = buf[start + 4];
	f->maxWidth = buf[start + 5];
	f->count = READ_LE_UINT16(buf + 10) - widthList;
	f->chars = (FontChar *)calloc(f->count, sizeof(FontChar));

	for (i = 0; i < f->count; i++) {
		FontChar *fc = &f->chars[i];
		uint16 dataOffset;
		uint8 x;
		uint8 y;

		fc->width = buf[widthList + i];
		fc->unusedLines = buf[lineList + i * 2];
		fc->usedLines = buf[lineList + i * 2 + 1];

		dataOffset = READ_LE_UINT16(buf + dataStart + i * 2);
		if (dataOffset == 0) continue;

		fc->data = (uint8 *)malloc(fc->usedLines * fc->width);

		for (y = 0; y < fc->usedLines; y++) {
			for (x = 0; x < fc->width; x++) {
				uint8 data = buf[dataOffset + y * ((fc->width + 1) / 2) + x / 2];
				if (x % 2 != 0) data >>= 4;
				fc->data[y * fc->width + x] = data & 0xF;
			}
		}
	}

	free(buf);

	return f;
}