diff --git a/modules/imgcodecs/test/test_png.cpp b/modules/imgcodecs/test/test_png.cpp index 4cf0e0cd99..2eb8a82a96 100644 --- a/modules/imgcodecs/test/test_png.cpp +++ b/modules/imgcodecs/test/test_png.cpp @@ -327,6 +327,38 @@ const string pngsuite_files_corrupted[] = { INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Png_PngSuite_Corrupted, testing::ValuesIn(pngsuite_files_corrupted)); +typedef testing::TestWithParam> Imgcodecs_Png_ImwriteFlags; + +TEST_P(Imgcodecs_Png_ImwriteFlags, compression_level) +{ + const string root = cvtest::TS::ptr()->get_data_path(); + const string filename = root + get<0>(GetParam()); + + const int compression_level = get<1>(GetParam()); + const size_t compression_level_output_size = get<2>(GetParam()); + + Mat src = imread(filename, IMREAD_UNCHANGED); + EXPECT_FALSE(src.empty()) << "Cannot read test image " << filename; + + vector buf; + imencode(".png", src, buf, { IMWRITE_PNG_COMPRESSION, compression_level }); + EXPECT_EQ(buf.size(), compression_level_output_size); +} + +INSTANTIATE_TEST_CASE_P(/**/, + Imgcodecs_Png_ImwriteFlags, + testing::Values( + make_tuple("../perf/512x512.png", 0, 788279), + make_tuple("../perf/512x512.png", 1, 179503), + make_tuple("../perf/512x512.png", 2, 176007), + make_tuple("../perf/512x512.png", 3, 170497), + make_tuple("../perf/512x512.png", 4, 163357), + make_tuple("../perf/512x512.png", 5, 159190), + make_tuple("../perf/512x512.png", 6, 156621), + make_tuple("../perf/512x512.png", 7, 155696), + make_tuple("../perf/512x512.png", 8, 153708), + make_tuple("../perf/512x512.png", 9, 152181))); + #endif // HAVE_PNG }} // namespace