compare_two_images 3308 contrib/libtests/pngstest.c       return compare_two_images(image, output, 0/*via linear*/, NULL);
compare_two_images 3399 contrib/libtests/pngstest.c          result = compare_two_images(image, &copy, 0/*via linear*/, background);
compare_two_images 3416 contrib/libtests/pngstest.c             result = compare_two_images(image, &output, 0, background);
compare_two_images 3439 contrib/libtests/pngstest.c                result = compare_two_images(image, &output, 1/*via_linear*/,