png_get_bKGD     7225 src/image.c    DEF_DLL_FN (png_uint_32, png_get_bKGD,
png_get_bKGD     7265 src/image.c      LOAD_DLL_FN (library, png_get_bKGD);
png_get_bKGD     7732 src/image.c          if (png_get_bKGD (png_ptr, info_ptr, &bg))