png_get_bKGD     7823 src/image.c    DEF_DLL_FN (png_uint_32, png_get_bKGD,
png_get_bKGD     7863 src/image.c      LOAD_DLL_FN (library, png_get_bKGD);
png_get_bKGD     8332 src/image.c          if (png_get_bKGD (png_ptr, info_ptr, &bg))