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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /gfx/gl/gtest | |
parent | Initial commit. (diff) | |
download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/gl/gtest')
-rw-r--r-- | gfx/gl/gtest/TestColorspaces.cpp | 405 | ||||
-rw-r--r-- | gfx/gl/gtest/moz.build | 15 |
2 files changed, 420 insertions, 0 deletions
diff --git a/gfx/gl/gtest/TestColorspaces.cpp b/gfx/gl/gtest/TestColorspaces.cpp new file mode 100644 index 0000000000..af204c7fc9 --- /dev/null +++ b/gfx/gl/gtest/TestColorspaces.cpp @@ -0,0 +1,405 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "gtest/gtest.h" +#include "Colorspaces.h" + +#include <limits> + +namespace mozilla::color { +mat4 YuvFromYcbcr(const YcbcrDesc&); +float TfFromLinear(const PiecewiseGammaDesc&, float linear); +float LinearFromTf(const PiecewiseGammaDesc&, float tf); +} // namespace mozilla::color + +using namespace mozilla::color; + +auto Calc8From8(const ColorspaceTransform& ct, const ivec3 in8) { + const auto in = vec3(in8) / vec3(255); + const auto out = ct.DstFromSrc(in); + const auto out8 = ivec3(round(out * vec3(255))); + return out8; +} + +auto Sample8From8(const Lut3& lut, const vec3 in8) { + const auto in = in8 / vec3(255); + const auto out = lut.Sample(in); + const auto out8 = ivec3(round(out * vec3(255))); + return out8; +} + +TEST(Colorspaces, YcbcrDesc_Narrow8) +{ + const auto m = YuvFromYcbcr(YcbcrDesc::Narrow8()); + + const auto Yuv8 = [&](const ivec3 ycbcr8) { + const auto ycbcr = vec4(vec3(ycbcr8) / 255, 1); + const auto yuv = m * ycbcr; + return ivec3(round(yuv * 255)); + }; + + EXPECT_EQ(Yuv8({{16, 128, 128}}), (ivec3{{0, 0, 0}})); + EXPECT_EQ(Yuv8({{17, 128, 128}}), (ivec3{{1, 0, 0}})); + // y = 0.5 => (16 + 235) / 2 = 125.5 + EXPECT_EQ(Yuv8({{125, 128, 128}}), (ivec3{{127, 0, 0}})); + EXPECT_EQ(Yuv8({{126, 128, 128}}), (ivec3{{128, 0, 0}})); + EXPECT_EQ(Yuv8({{234, 128, 128}}), (ivec3{{254, 0, 0}})); + EXPECT_EQ(Yuv8({{235, 128, 128}}), (ivec3{{255, 0, 0}})); + + // Check that we get the naive out-of-bounds behavior we'd expect: + EXPECT_EQ(Yuv8({{15, 128, 128}}), (ivec3{{-1, 0, 0}})); + EXPECT_EQ(Yuv8({{236, 128, 128}}), (ivec3{{256, 0, 0}})); +} + +TEST(Colorspaces, YcbcrDesc_Full8) +{ + const auto m = YuvFromYcbcr(YcbcrDesc::Full8()); + + const auto Yuv8 = [&](const ivec3 ycbcr8) { + const auto ycbcr = vec4(vec3(ycbcr8) / 255, 1); + const auto yuv = m * ycbcr; + return ivec3(round(yuv * 255)); + }; + + EXPECT_EQ(Yuv8({{0, 128, 128}}), (ivec3{{0, 0, 0}})); + EXPECT_EQ(Yuv8({{1, 128, 128}}), (ivec3{{1, 0, 0}})); + EXPECT_EQ(Yuv8({{127, 128, 128}}), (ivec3{{127, 0, 0}})); + EXPECT_EQ(Yuv8({{128, 128, 128}}), (ivec3{{128, 0, 0}})); + EXPECT_EQ(Yuv8({{254, 128, 128}}), (ivec3{{254, 0, 0}})); + EXPECT_EQ(Yuv8({{255, 128, 128}}), (ivec3{{255, 0, 0}})); +} + +TEST(Colorspaces, YcbcrDesc_Float) +{ + const auto m = YuvFromYcbcr(YcbcrDesc::Float()); + + const auto Yuv8 = [&](const vec3 ycbcr8) { + const auto ycbcr = vec4(vec3(ycbcr8) / 255, 1); + const auto yuv = m * ycbcr; + return ivec3(round(yuv * 255)); + }; + + EXPECT_EQ(Yuv8({{0, 0.5 * 255, 0.5 * 255}}), (ivec3{{0, 0, 0}})); + EXPECT_EQ(Yuv8({{1, 0.5 * 255, 0.5 * 255}}), (ivec3{{1, 0, 0}})); + EXPECT_EQ(Yuv8({{127, 0.5 * 255, 0.5 * 255}}), (ivec3{{127, 0, 0}})); + EXPECT_EQ(Yuv8({{128, 0.5 * 255, 0.5 * 255}}), (ivec3{{128, 0, 0}})); + EXPECT_EQ(Yuv8({{254, 0.5 * 255, 0.5 * 255}}), (ivec3{{254, 0, 0}})); + EXPECT_EQ(Yuv8({{255, 0.5 * 255, 0.5 * 255}}), (ivec3{{255, 0, 0}})); +} + +TEST(Colorspaces, ColorspaceTransform_Rec709Narrow) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Narrow8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {}, + }; + const auto ct = ColorspaceTransform::Create(src, dst); + + EXPECT_EQ(Calc8From8(ct, {{16, 128, 128}}), (ivec3{0})); + EXPECT_EQ(Calc8From8(ct, {{17, 128, 128}}), (ivec3{1})); + EXPECT_EQ(Calc8From8(ct, {{126, 128, 128}}), (ivec3{128})); + EXPECT_EQ(Calc8From8(ct, {{234, 128, 128}}), (ivec3{254})); + EXPECT_EQ(Calc8From8(ct, {{235, 128, 128}}), (ivec3{255})); + + // Check that we get the naive out-of-bounds behavior we'd expect: + EXPECT_EQ(Calc8From8(ct, {{15, 128, 128}}), (ivec3{-1})); + EXPECT_EQ(Calc8From8(ct, {{236, 128, 128}}), (ivec3{256})); +} + +TEST(Colorspaces, LutSample_Rec709Float) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Float()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {}, + }; + const auto lut = ColorspaceTransform::Create(src, dst).ToLut3(); + + EXPECT_EQ(Sample8From8(lut, {{0, 0.5 * 255, 0.5 * 255}}), (ivec3{0})); + EXPECT_EQ(Sample8From8(lut, {{1, 0.5 * 255, 0.5 * 255}}), (ivec3{1})); + EXPECT_EQ(Sample8From8(lut, {{127, 0.5 * 255, 0.5 * 255}}), (ivec3{127})); + EXPECT_EQ(Sample8From8(lut, {{128, 0.5 * 255, 0.5 * 255}}), (ivec3{128})); + EXPECT_EQ(Sample8From8(lut, {{254, 0.5 * 255, 0.5 * 255}}), (ivec3{254})); + EXPECT_EQ(Sample8From8(lut, {{255, 0.5 * 255, 0.5 * 255}}), (ivec3{255})); +} + +TEST(Colorspaces, LutSample_Rec709Narrow) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Narrow8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {}, + }; + const auto lut = ColorspaceTransform::Create(src, dst).ToLut3(); + + EXPECT_EQ(Sample8From8(lut, {{16, 128, 128}}), (ivec3{0})); + EXPECT_EQ(Sample8From8(lut, {{17, 128, 128}}), (ivec3{1})); + EXPECT_EQ(Sample8From8(lut, {{int((235 + 16) / 2), 128, 128}}), (ivec3{127})); + EXPECT_EQ(Sample8From8(lut, {{int((235 + 16) / 2) + 1, 128, 128}}), + (ivec3{128})); + EXPECT_EQ(Sample8From8(lut, {{234, 128, 128}}), (ivec3{254})); + EXPECT_EQ(Sample8From8(lut, {{235, 128, 128}}), (ivec3{255})); +} + +TEST(Colorspaces, LutSample_Rec709Full) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Full8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {}, + }; + const auto lut = ColorspaceTransform::Create(src, dst).ToLut3(); + + EXPECT_EQ(Sample8From8(lut, {{0, 128, 128}}), (ivec3{0})); + EXPECT_EQ(Sample8From8(lut, {{1, 128, 128}}), (ivec3{1})); + EXPECT_EQ(Sample8From8(lut, {{16, 128, 128}}), (ivec3{16})); + EXPECT_EQ(Sample8From8(lut, {{128, 128, 128}}), (ivec3{128})); + EXPECT_EQ(Sample8From8(lut, {{235, 128, 128}}), (ivec3{235})); + EXPECT_EQ(Sample8From8(lut, {{254, 128, 128}}), (ivec3{254})); + EXPECT_EQ(Sample8From8(lut, {{255, 128, 128}}), (ivec3{255})); +} + +TEST(Colorspaces, PiecewiseGammaDesc_Srgb) +{ + const auto tf = PiecewiseGammaDesc::Srgb(); + + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x00 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x01 / 255.0) * 255)), 0x0d); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x37 / 255.0) * 255)), 0x80); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x80 / 255.0) * 255)), 0xbc); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xfd / 255.0) * 255)), 0xfe); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xfe / 255.0) * 255)), 0xff); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xff / 255.0) * 255)), 0xff); + + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x00 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x01 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x06 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x07 / 255.0) * 255)), 0x01); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x0d / 255.0) * 255)), 0x01); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x80 / 255.0) * 255)), 0x37); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xbc / 255.0) * 255)), 0x80); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xfe / 255.0) * 255)), 0xfd); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xff / 255.0) * 255)), 0xff); +} + +TEST(Colorspaces, PiecewiseGammaDesc_Rec709) +{ + const auto tf = PiecewiseGammaDesc::Rec709(); + + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x00 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x01 / 255.0) * 255)), 0x05); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x43 / 255.0) * 255)), 0x80); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0x80 / 255.0) * 255)), 0xb4); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xfd / 255.0) * 255)), 0xfe); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xfe / 255.0) * 255)), 0xff); + EXPECT_EQ(int(roundf(TfFromLinear(tf, 0xff / 255.0) * 255)), 0xff); + + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x00 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x01 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x02 / 255.0) * 255)), 0x00); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x03 / 255.0) * 255)), 0x01); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x05 / 255.0) * 255)), 0x01); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0x80 / 255.0) * 255)), 0x43); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xb4 / 255.0) * 255)), 0x80); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xfe / 255.0) * 255)), 0xfd); + EXPECT_EQ(int(roundf(LinearFromTf(tf, 0xff / 255.0) * 255)), 0xff); +} + +TEST(Colorspaces, ColorspaceTransform_PiecewiseGammaDesc) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Srgb(), + {}, + {}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Srgb(), + PiecewiseGammaDesc::Srgb(), + {}, + }; + const auto toGamma = ColorspaceTransform::Create(src, dst); + const auto toLinear = ColorspaceTransform::Create(dst, src); + + EXPECT_EQ(Calc8From8(toGamma, ivec3{0x00}), (ivec3{0x00})); + EXPECT_EQ(Calc8From8(toGamma, ivec3{0x01}), (ivec3{0x0d})); + EXPECT_EQ(Calc8From8(toGamma, ivec3{0x37}), (ivec3{0x80})); + EXPECT_EQ(Calc8From8(toGamma, ivec3{0x80}), (ivec3{0xbc})); + EXPECT_EQ(Calc8From8(toGamma, ivec3{0xfd}), (ivec3{0xfe})); + EXPECT_EQ(Calc8From8(toGamma, ivec3{0xff}), (ivec3{0xff})); + + EXPECT_EQ(Calc8From8(toLinear, ivec3{0x00}), (ivec3{0x00})); + EXPECT_EQ(Calc8From8(toLinear, ivec3{0x0d}), (ivec3{0x01})); + EXPECT_EQ(Calc8From8(toLinear, ivec3{0x80}), (ivec3{0x37})); + EXPECT_EQ(Calc8From8(toLinear, ivec3{0xbc}), (ivec3{0x80})); + EXPECT_EQ(Calc8From8(toLinear, ivec3{0xfe}), (ivec3{0xfd})); + EXPECT_EQ(Calc8From8(toLinear, ivec3{0xff}), (ivec3{0xff})); +} + +// - +// Actual end-to-end tests + +TEST(Colorspaces, SrgbFromRec709) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Narrow8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Srgb(), + PiecewiseGammaDesc::Srgb(), + {}, + }; + const auto ct = ColorspaceTransform::Create(src, dst); + + EXPECT_EQ(Calc8From8(ct, ivec3{{16, 128, 128}}), (ivec3{0})); + EXPECT_EQ(Calc8From8(ct, ivec3{{17, 128, 128}}), (ivec3{3})); + EXPECT_EQ(Calc8From8(ct, ivec3{{115, 128, 128}}), (ivec3{128})); + EXPECT_EQ(Calc8From8(ct, ivec3{{126, 128, 128}}), (ivec3{140})); + EXPECT_EQ(Calc8From8(ct, ivec3{{234, 128, 128}}), (ivec3{254})); + EXPECT_EQ(Calc8From8(ct, ivec3{{235, 128, 128}}), (ivec3{255})); +} + +TEST(Colorspaces, SrgbFromDisplayP3) +{ + const auto p3C = ColorspaceDesc{ + Chromaticities::DisplayP3(), + PiecewiseGammaDesc::DisplayP3(), + }; + const auto srgbC = ColorspaceDesc{ + Chromaticities::Srgb(), + PiecewiseGammaDesc::Srgb(), + }; + const auto srgbLinearC = ColorspaceDesc{ + Chromaticities::Srgb(), + {}, + }; + const auto srgbFromP3 = ColorspaceTransform::Create(p3C, srgbC); + const auto srgbLinearFromP3 = ColorspaceTransform::Create(p3C, srgbLinearC); + + // E.g. + // https://colorjs.io/apps/convert/?color=color(display-p3%200.4%200.8%200.4)&precision=4 + auto srgb = srgbFromP3.DstFromSrc(vec3{{0.4, 0.8, 0.4}}); + EXPECT_NEAR(srgb.x(), 0.179, 0.001); + EXPECT_NEAR(srgb.y(), 0.812, 0.001); + EXPECT_NEAR(srgb.z(), 0.342, 0.001); + auto srgbLinear = srgbLinearFromP3.DstFromSrc(vec3{{0.4, 0.8, 0.4}}); + EXPECT_NEAR(srgbLinear.x(), 0.027, 0.001); + EXPECT_NEAR(srgbLinear.y(), 0.624, 0.001); + EXPECT_NEAR(srgbLinear.z(), 0.096, 0.001); +} + +// - + +struct Stats { + double mean = 0; + double variance = 0; + double min = std::numeric_limits<double>::infinity(); + double max = -std::numeric_limits<double>::infinity(); + + template <class T> + static Stats For(const T& iterable) { + auto ret = Stats{}; + for (const auto& cur : iterable) { + ret.mean += cur; + ret.min = std::min(ret.min, cur); + ret.max = std::max(ret.max, cur); + } + ret.mean /= iterable.size(); + for (const auto& cur : iterable) { + ret.variance += pow(cur - ret.mean, 2); + } + ret.variance /= iterable.size(); + return ret; + } + + double standardDeviation() const { return sqrt(variance); } +}; + +static Stats StatsForLutError(const ColorspaceTransform& ct, + const ivec3 srcQuants, const ivec3 dstQuants) { + const auto lut = ct.ToLut3(); + + const auto dstScale = vec3(dstQuants - 1); + + std::vector<double> quantErrors; + quantErrors.reserve(srcQuants.x() * srcQuants.y() * srcQuants.z()); + ForEachSampleWithin(srcQuants, [&](const vec3& src) { + const auto sampled = lut.Sample(src); + const auto actual = ct.DstFromSrc(src); + const auto isampled = ivec3(round(sampled * dstScale)); + const auto iactual = ivec3(round(actual * dstScale)); + const auto ierr = abs(isampled - iactual); + const auto quantError = dot(ierr, ivec3{1}); + quantErrors.push_back(quantError); + if (quantErrors.size() % 100000 == 0) { + printf("%zu of %zu\n", quantErrors.size(), quantErrors.capacity()); + } + }); + + const auto quantErrStats = Stats::For(quantErrors); + return quantErrStats; +} + +TEST(Colorspaces, LutError_Rec709Full_Rec709Rgb) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Full8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {}, + }; + const auto ct = ColorspaceTransform::Create(src, dst); + const auto stats = StatsForLutError(ct, ivec3{64}, ivec3{256}); + EXPECT_NEAR(stats.mean, 0.000, 0.001); + EXPECT_NEAR(stats.standardDeviation(), 0.008, 0.001); + EXPECT_NEAR(stats.min, 0, 0.001); + EXPECT_NEAR(stats.max, 1, 0.001); +} + +TEST(Colorspaces, LutError_Rec709Full_Srgb) +{ + const auto src = ColorspaceDesc{ + Chromaticities::Rec709(), + PiecewiseGammaDesc::Rec709(), + {{YuvLumaCoeffs::Rec709(), YcbcrDesc::Full8()}}, + }; + const auto dst = ColorspaceDesc{ + Chromaticities::Srgb(), + PiecewiseGammaDesc::Srgb(), + {}, + }; + const auto ct = ColorspaceTransform::Create(src, dst); + const auto stats = StatsForLutError(ct, ivec3{64}, ivec3{256}); + EXPECT_NEAR(stats.mean, 0.530, 0.001); + EXPECT_NEAR(stats.standardDeviation(), 1.674, 0.001); + EXPECT_NEAR(stats.min, 0, 0.001); + EXPECT_NEAR(stats.max, 17, 0.001); +} diff --git a/gfx/gl/gtest/moz.build b/gfx/gl/gtest/moz.build new file mode 100644 index 0000000000..5b57e3ded1 --- /dev/null +++ b/gfx/gl/gtest/moz.build @@ -0,0 +1,15 @@ +# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*- +# vim: set filetype=python: +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +LOCAL_INCLUDES += [ + "/gfx/gl", +] + +UNIFIED_SOURCES += [ + "TestColorspaces.cpp", +] + +FINAL_LIBRARY = "xul-gtest" |