ColorMapSize      263 ext/gd/libgd/gd_gif_out.c         int ColorMapSize;
ColorMapSize      272 ext/gd/libgd/gd_gif_out.c         ColorMapSize = 1 << BitsPerPixel;
ColorMapSize      347 ext/gd/libgd/gd_gif_out.c         for( i=0; i<ColorMapSize; ++i ) {