FreeImage 生成带透明通道的GIF(2)

RGBQUAD *Palette = FreeImage_GetPalette(hDIB8bpp);
    for (int i = 0; i < 256; i++)
    {
        Transparency[i] = 0xFF;
        if (Palette[i].rgbRed != 0x00 && Palette[i].rgbBlue != 0xFF && Palette[i].rgbGreen > 0x00)
        {
            Transparency[i] = 0x00;
        }
    }

FreeImage_SetTransparencyTable(hDIB8bpp, Transparency, 256);

//  FreeImage_Save(FIF_PNG, hDIB8bpp, "out.png");
    FreeImage_Unload(hDIB24bpp);

return hDIB8bpp;
}

原图：

结果：