Function LoadGIFFile

RSDKv4/Sprite.cpp:306–383

    return false;
}
int LoadGIFFile(const char *filePath, byte sheetID)
{
    FileInfo info;
    if (LoadFile(filePath, &info)) {
        GFXSurface *surface = &gfxSurface[sheetID];
        StrCopy(surface->fileName, filePath);

        byte fileBuffer = 0;

        SetFilePosition(6); // GIF89a
        FileRead(&fileBuffer, 1);
        surface->width = fileBuffer;
        FileRead(&fileBuffer, 1);
        surface->width |= fileBuffer << 8;
        FileRead(&fileBuffer, 1);
        surface->height = fileBuffer;
        FileRead(&fileBuffer, 1);
        surface->height |= fileBuffer << 8;

        FileRead(&fileBuffer, 1); // Palette Size
        // int has_pallete  = (fileBuffer & 0x80) >> 7;
        // int colors       = ((fileBuffer & 0x70) >> 4) + 1;
        int palette_size = (fileBuffer & 0x7) + 1;
        if (palette_size > 0)
            palette_size = 1 << palette_size;
        FileRead(&fileBuffer, 1); // BG Color index (thrown away)
        FileRead(&fileBuffer, 1); // idk actually (still thrown away)

        int c = 0;
        byte clr[3];
        do {
            ++c;
            FileRead(clr, 3);
        } while (c != palette_size);

        FileRead(&fileBuffer, 1);
        while (fileBuffer != ',') FileRead(&fileBuffer, 1); // gif image start identifier

        ushort fileBuffer2 = 0;
        FileRead(&fileBuffer2, 2);
        FileRead(&fileBuffer2, 2);
        FileRead(&fileBuffer2, 2);
        FileRead(&fileBuffer2, 2);
        FileRead(&fileBuffer, 1);
        bool interlaced = (fileBuffer & 0x40) >> 6;
        if (fileBuffer >> 7 == 1) {
            int c = 0x80;
            do {
                ++c;
                FileRead(clr, 3);
            } while (c != 0x100);
        }

        surface->dataPosition = gfxDataPosition;

#if RETRO_SOFTWARE_RENDER
        surface->widthShift = 0;
        int w               = surface->width;