1.1 --- a/src/video/SDL_blit_slow.c	Sat Oct 01 10:43:01 2016 -0700
     1.2 +++ b/src/video/SDL_blit_slow.c	Sat Oct 01 10:46:10 2016 -0700
     1.3 @@ -46,6 +46,8 @@
     1.4      SDL_PixelFormat *dst_fmt = info->dst_fmt;
     1.5      int srcbpp = src_fmt->BytesPerPixel;
     1.6      int dstbpp = dst_fmt->BytesPerPixel;
     1.7 +    Uint32 rgbmask = ~src_fmt->Amask;
     1.8 +    Uint32 ckey = info->colorkey & rgbmask;
     1.9  
    1.10      srcy = 0;
    1.11      posy = 0;
    1.12 @@ -85,7 +87,7 @@
    1.13                      srcpixel = (srcR << src_fmt->Rshift) |
    1.14                          (srcG << src_fmt->Gshift) | (srcB << src_fmt->Bshift);
    1.15                  }
    1.16 -                if (srcpixel == info->colorkey) {
    1.17 +                if ((srcpixel & rgbmask) == ckey) {
    1.18                      posx += incx;
    1.19                      dst += dstbpp;
    1.20                      continue;