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| author | Kory Postma <postmako@gmail.com> | 2023-05-24 15:00:47 -0500 |
|---|---|---|
| committer | Kory Postma <postmako@gmail.com> | 2023-05-27 18:01:44 -0500 |
| commit | c8cac39446a3826752fa9122750cb59cd07058ec (patch) | |
| tree | b83606db33a594107e8595ccc21699d925a1e271 /tests | |
| parent | 2eec9a67d564b11326f44c5ef8b6b6f9aec251b9 (diff) | |
| download | redot-engine-c8cac39446a3826752fa9122750cb59cd07058ec.tar.gz | |
Grayscale fix for Image::premultiply_alpha() and Image::convert(FORMAT_L8) while using REC.709, with added test case
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/core/io/test_image.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/core/io/test_image.h b/tests/core/io/test_image.h index 763eaed2f8..d6eaa8bd77 100644 --- a/tests/core/io/test_image.h +++ b/tests/core/io/test_image.h @@ -303,6 +303,27 @@ TEST_CASE("[Image] Modifying pixels of an image") { CHECK_MESSAGE( image3->get_pixel(1, 0).is_equal_approx(Color(0, 0, 0, 0)), "flip_y() should not leave old pixels behind."); + + // Pre-multiply Alpha then Convert from RGBA to L8, checking alpha + { + Ref<Image> gray_image = memnew(Image(3, 3, false, Image::FORMAT_RGBA8)); + CHECK_NOTHROW_MESSAGE(gray_image->fill_rect(Rect2i(0, 0, 3, 3), Color(1, 1, 1, 0)), "fill_rect() shouldn't throw for any rect."); + gray_image->set_pixel(1, 1, Color(1, 1, 1, 1)); + gray_image->set_pixel(1, 2, Color(0.5, 0.5, 0.5, 0.5)); + gray_image->set_pixel(2, 1, Color(0.25, 0.05, 0.5, 1.0)); + gray_image->set_pixel(2, 2, Color(0.5, 0.25, 0.95, 0.75)); + gray_image->premultiply_alpha(); + gray_image->convert(Image::FORMAT_L8); + CHECK_MESSAGE(gray_image->get_pixel(0, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black."); + CHECK_MESSAGE(gray_image->get_pixel(0, 1).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black."); + CHECK_MESSAGE(gray_image->get_pixel(0, 2).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black."); + CHECK_MESSAGE(gray_image->get_pixel(1, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black."); + CHECK_MESSAGE(gray_image->get_pixel(1, 1).is_equal_approx(Color(1, 1, 1, 1)), "convert() RGBA to L8 should be white."); + CHECK_MESSAGE(gray_image->get_pixel(1, 2).is_equal_approx(Color(0.250980407, 0.250980407, 0.250980407, 1)), "convert() RGBA to L8 should be around 0.250980407 (64)."); + CHECK_MESSAGE(gray_image->get_pixel(2, 0).is_equal_approx(Color(0, 0, 0, 1)), "convert() RGBA to L8 should be black."); + CHECK_MESSAGE(gray_image->get_pixel(2, 1).is_equal_approx(Color(0.121568628, 0.121568628, 0.121568628, 1)), "convert() RGBA to L8 should be around 0.121568628 (31)."); + CHECK_MESSAGE(gray_image->get_pixel(2, 2).is_equal_approx(Color(0.266666681, 0.266666681, 0.266666681, 1)), "convert() RGBA to L8 should be around 0.266666681 (68)."); + } } } // namespace TestImage |