Function BmpReadBitmap

src/bmp.cpp:317–338

* Reads the bitmap * 1 bpp and 4 bpp bitmaps are converted to 8 bpp bitmaps */

 * 1 bpp and 4 bpp bitmaps are converted to 8 bpp bitmaps
 */
bool BmpReadBitmap(RandomAccessFile &file, BmpInfo &info, BmpData &data)
{
	data.bitmap.resize(static_cast<size_t>(info.width) * info.height * ((info.bpp == 24) ? 3 : 1));

	/* Load image */
	file.SeekTo(info.offset, SEEK_SET);
	switch (info.compression) {
		case 0: // no compression
			switch (info.bpp) {
				case 1: return BmpRead1(file, info, data);
				case 4: return BmpRead4(file, info, data);
				case 8: return BmpRead8(file, info, data);
				case 24: return BmpRead24(file, info, data);
				default: NOT_REACHED();
			}
			break;

		case 1: return BmpRead8Rle(file, info, data); // 8-bit RLE compression
		case 2: return BmpRead4Rle(file, info, data); // 4-bit RLE compression
		default: NOT_REACHED();
	}
}