png_set_error_fn 1755 3rdparty/libpng/png.h PNG_EXPORT(75, void, png_set_error_fn,
png_set_error_fn   97 3rdparty/libpng/pngread.c    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
png_set_error_fn  515 3rdparty/libpng/pngwrite.c    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);