65                png_warning(png_ptr, "Writing zero-length unknown chunk");  in write_unknown_chunks()
100          png_warning(png_ptr,  in png_write_info_before_PLTE()
312          png_warning(png_ptr, "Unable to write international text");  in png_write_info()
326          png_warning(png_ptr, "Unable to write compressed text");  in png_write_info()
341          png_warning(png_ptr, "Unable to write uncompressed text");  in png_write_info()
409             png_warning(png_ptr, "Unable to write international text");  in png_write_end()
422             png_warning(png_ptr, "Unable to write compressed text");  in png_write_end()
435             png_warning(png_ptr, "Unable to write uncompressed text");  in png_write_end()
720          png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined");  in png_write_row()
725          png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined");  in png_write_row()
730          png_warning(png_ptr,  in png_write_row()
736          png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined");  in png_write_row()
741          png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined");  in png_write_row()
746          png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined");  in png_write_row()
751          png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined");  in png_write_row()
1210       png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");  in png_set_compression_window_bits()
1216       png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");  in png_set_compression_window_bits()
1235       png_warning(png_ptr, "Only compression method 8 is supported by PNG");  in png_set_compression_method()
1287       png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");  in png_set_text_compression_window_bits()
1293       png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");  in png_set_text_compression_window_bits()
1309       png_warning(png_ptr, "Only compression method 8 is supported by PNG");  in png_set_text_compression_method()