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Add utilities to get/set RGBA values for any RGB format. (AOMediaCode…
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| // Copyright 2023 Google LLC | ||
| // SPDX-License-Identifier: BSD-2-Clause | ||
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| #include <tuple> | ||
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| #include "avif/internal.h" | ||
| #include "aviftest_helpers.h" | ||
| #include "gtest/gtest.h" | ||
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| using ::testing::Combine; | ||
| using ::testing::Values; | ||
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| namespace libavif { | ||
| namespace { | ||
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| class SetGetRGBATest | ||
| : public testing::TestWithParam<std::tuple< | ||
| /*rgb_depth=*/int, avifRGBFormat, /*is_float=*/bool>> {}; | ||
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| TEST_P(SetGetRGBATest, SetGetTest) { | ||
| const int rgb_depth = std::get<0>(GetParam()); | ||
| const avifRGBFormat rgb_format = std::get<1>(GetParam()); | ||
| const bool is_float = std::get<2>(GetParam()); | ||
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| // Unused yuv image, simply needed to initialize the rgb image. | ||
| testutil::AvifImagePtr yuv( | ||
| avifImageCreate(/*width=*/13, /*height=*/17, 8, AVIF_PIXEL_FORMAT_YUV444), | ||
| avifImageDestroy); | ||
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| testutil::AvifRgbImage rgb(yuv.get(), rgb_depth, rgb_format); | ||
| rgb.isFloat = is_float; | ||
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| avifRGBColorSpaceInfo color_space; | ||
| ASSERT_TRUE(avifGetRGBColorSpaceInfo(&rgb, &color_space)); | ||
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| float epsilon = 1.0f / color_space.maxChannelF; | ||
| if (rgb_format == AVIF_RGB_FORMAT_RGB_565) { | ||
| // Only 5 bits of information per channel except G which has 6. | ||
| epsilon = 1.0f / (1 << 5); | ||
| } else if (rgb.isFloat) { | ||
| epsilon = 0.0005f; // Half precision floats are not that precise. | ||
| } | ||
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| float pixel_read[4]; | ||
| for (uint32_t j = 0; j < rgb.height; ++j) { | ||
| for (uint32_t i = 0; i < rgb.width; ++i) { | ||
| // Generate some arbitrary pixel values. | ||
| const float pixel_to_write[4] = { | ||
| 0.0f + static_cast<float>(i) / rgb.width, | ||
| 0.5f + static_cast<float>(j) / (rgb.height * 2), | ||
| 1.0f - static_cast<float>(i + j) / ((rgb.width + rgb.height) * 2), | ||
| 1.0f - static_cast<float>(i) / rgb.width}; | ||
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| avifSetRGBAPixel(&rgb, i, j, &color_space, pixel_to_write); | ||
| avifGetRGBAPixel(&rgb, i, j, &color_space, pixel_read); | ||
| EXPECT_NEAR(pixel_read[0], pixel_to_write[0], epsilon); | ||
| EXPECT_NEAR(pixel_read[1], pixel_to_write[1], epsilon); | ||
| EXPECT_NEAR(pixel_read[2], pixel_to_write[2], epsilon); | ||
| if (avifRGBFormatHasAlpha(rgb_format)) { | ||
| EXPECT_NEAR(pixel_read[3], pixel_to_write[3], epsilon); | ||
| } else { | ||
| EXPECT_EQ(pixel_read[3], 1.0f); | ||
| } | ||
| } | ||
| } | ||
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| // Check that 0 maps to 0 and 1.0f maps to 1.0f. | ||
| const float pixel_zero[4] = {0.0f, 0.0f, 0.0f, 1.0f}; | ||
| avifSetRGBAPixel(&rgb, 0, 0, &color_space, pixel_zero); | ||
| avifGetRGBAPixel(&rgb, 0, 0, &color_space, pixel_read); | ||
| EXPECT_EQ(pixel_read[0], pixel_zero[0]); | ||
| EXPECT_EQ(pixel_read[1], pixel_zero[1]); | ||
| EXPECT_EQ(pixel_read[2], pixel_zero[2]); | ||
| EXPECT_EQ(pixel_read[3], pixel_zero[3]); | ||
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| const float pixel_one[4] = {1.0f, 1.0f, 1.0f, 1.0f}; | ||
| avifSetRGBAPixel(&rgb, 0, 0, &color_space, pixel_one); | ||
| avifGetRGBAPixel(&rgb, 0, 0, &color_space, pixel_read); | ||
| EXPECT_EQ(pixel_read[0], pixel_one[0]); | ||
| EXPECT_EQ(pixel_read[1], pixel_one[1]); | ||
| EXPECT_EQ(pixel_read[2], pixel_one[2]); | ||
| EXPECT_EQ(pixel_read[3], pixel_one[3]); | ||
| } | ||
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| INSTANTIATE_TEST_SUITE_P( | ||
| NonFloatNonRgb565, SetGetRGBATest, | ||
| Combine(/*rgb_depth=*/Values(8, 10, 12, 16), | ||
| Values(AVIF_RGB_FORMAT_RGB, AVIF_RGB_FORMAT_RGBA, | ||
| AVIF_RGB_FORMAT_ARGB, AVIF_RGB_FORMAT_BGR, | ||
| AVIF_RGB_FORMAT_BGRA, AVIF_RGB_FORMAT_ABGR), | ||
| /*is_float=*/Values(false))); | ||
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| INSTANTIATE_TEST_SUITE_P(Rgb565, SetGetRGBATest, | ||
| Combine(/*rgb_depth=*/Values(8), | ||
| Values(AVIF_RGB_FORMAT_RGB_565), | ||
| /*is_float=*/Values(false))); | ||
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| INSTANTIATE_TEST_SUITE_P( | ||
| Float, SetGetRGBATest, | ||
| Combine(/*rgb_depth=*/Values(16), | ||
| Values(AVIF_RGB_FORMAT_RGB, AVIF_RGB_FORMAT_RGBA, | ||
| AVIF_RGB_FORMAT_ARGB, AVIF_RGB_FORMAT_BGR, | ||
| AVIF_RGB_FORMAT_BGRA, AVIF_RGB_FORMAT_ABGR), | ||
| /*is_float=*/Values(true))); | ||
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| } // namespace | ||
| } // namespace libavif |
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