236             png_error(png_ptr, png_ptr->zstream.msg);  in png_text_compress()
238             png_error(png_ptr, "zlib error");  in png_text_compress()
337             png_error(png_ptr, png_ptr->zstream.msg);  in png_text_compress()
339             png_error(png_ptr, "zlib error");  in png_text_compress()
416             default: png_error(png_ptr,  in png_write_IHDR()
422             png_error(png_ptr, "Invalid bit depth for RGB image");  in png_write_IHDR()
432             default: png_error(png_ptr, "Invalid bit depth for paletted image");  in png_write_IHDR()
437             png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");  in png_write_IHDR()
442             png_error(png_ptr, "Invalid bit depth for RGBA image");  in png_write_IHDR()
446          png_error(png_ptr, "Invalid image color type specified");  in png_write_IHDR()
551       if (ret == Z_VERSION_ERROR) png_error(png_ptr,  in png_write_IHDR()
553       if (ret == Z_STREAM_ERROR) png_error(png_ptr,  in png_write_IHDR()
555       if (ret == Z_MEM_ERROR) png_error(png_ptr,  in png_write_IHDR()
557       png_error(png_ptr, "zlib failed to initialize compressor");  in png_write_IHDR()
592         png_error(png_ptr, "Invalid number of colors in palette");  in png_write_PLTE()
685          png_error(png_ptr,  in png_write_IDAT()
1949             png_error(png_ptr, png_ptr->zstream.msg);  in png_write_finish_row()
1951             png_error(png_ptr, "zlib error");  in png_write_finish_row()
2793             png_error(png_ptr, png_ptr->zstream.msg);  in png_write_filtered_row()
2795             png_error(png_ptr, "zlib error");  in png_write_filtered_row()