png_set_read_status_fn 1755 png.h          PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr,
png_set_read_status_fn  990 pngtest.c            png_set_read_status_fn(read_ptr, read_row_callback);
png_set_read_status_fn  998 pngtest.c            png_set_read_status_fn(read_ptr, NULL);