png_set_write_status_fn 1758 png.h          PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp png_ptr,
png_set_write_status_fn  988 pngtest.c            png_set_write_status_fn(write_ptr, write_row_callback);
png_set_write_status_fn  996 pngtest.c            png_set_write_status_fn(write_ptr, NULL);