png_handle_bKGD   356 pngpread.c           png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length);
png_handle_bKGD  1286 pngpriv.h      PNG_INTERNAL_FUNCTION(void,png_handle_bKGD,(png_structrp png_ptr,
png_handle_bKGD   167 pngread.c               png_handle_bKGD(png_ptr, info_ptr, length);
png_handle_bKGD   824 pngread.c               png_handle_bKGD(png_ptr, info_ptr, length);