зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1722031 - Fix RelativeLuminanceUtils::Adjust to not choke on blacks / zero components. r=mstange
Differential Revision: https://phabricator.services.mozilla.com/D120722
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@ -29,10 +29,13 @@ class RelativeLuminanceUtils {
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float g = ComputeComponent(NS_GET_G(aColor));
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float b = ComputeComponent(NS_GET_B(aColor));
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float luminance = ComputeFromComponents(r, g, b);
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float factor = aLuminance / luminance;
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uint8_t r1 = DecomputeComponent(r * factor);
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uint8_t g1 = DecomputeComponent(g * factor);
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uint8_t b1 = DecomputeComponent(b * factor);
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float factor = (aLuminance + 0.05f) / (luminance + 0.05f);
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uint8_t r1 =
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DecomputeComponent(std::max(0.0f, (r + 0.05f) * factor - 0.05f));
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uint8_t g1 =
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DecomputeComponent(std::max(0.0f, (g + 0.05f) * factor - 0.05f));
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uint8_t b1 =
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DecomputeComponent(std::max(0.0f, (b + 0.05f) * factor - 0.05f));
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return NS_RGBA(r1, g1, b1, NS_GET_A(aColor));
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}
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