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Photoshop's remaining blend modes in its groups (12.7a); v1.2.2 kernels for 12.7b

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雷电芽衣 committed 2026-09-27 12:50:33 -04:00
1 parent 29eab10edc
commit 7d47cc367a
26 files changed
+348 -56
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tests/BlendModeTests.cpp
+22 -1
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@@ -80,6 +80,20 @@ Rgb reference(LayerBlendMode mode, const Rgb &backdrop, const Rgb &source)
case LayerBlendMode::difference: result[channel] = std::abs(b - s); break;
case LayerBlendMode::colorDodge: result[channel] = b == 0 ? 0 : s >= 1 ? 1 : std::min(1.0, b / (1 - s)); break;
case LayerBlendMode::colorBurn: result[channel] = b >= 1 ? 1 : s <= 0 ? 0 : 1 - std::min(1.0, (1 - b) / s); break;
// Photoshop's separable modes that QPainter lacks.
case LayerBlendMode::hardLight: result[channel] = hardLight(b, s); break;
case LayerBlendMode::exclusion: result[channel] = b + s - 2 * b * s; break;
case LayerBlendMode::linearBurn: result[channel] = std::max(0.0, b + s - 1); break;
case LayerBlendMode::linearDodge: result[channel] = std::min(1.0, b + s); break;
case LayerBlendMode::vividLight:
result[channel] = s <= 0.5 ? (b >= 1 ? 1 : s <= 0 ? 0 : 1 - std::min(1.0, (1 - b) / (2 * s)))
: (b <= 0 ? 0 : s >= 1 ? 1 : std::min(1.0, b / (2 - 2 * s)));
break;
case LayerBlendMode::linearLight: result[channel] = std::clamp(b + 2 * s - 1, 0.0, 1.0); break;
case LayerBlendMode::pinLight: result[channel] = s <= 0.5 ? std::min(b, 2 * s) : std::max(b, 2 * s - 1); break;
case LayerBlendMode::hardMix: result[channel] = b + s >= 1 ? 1 : 0; break;
case LayerBlendMode::subtract: result[channel] = std::max(0.0, b - s); break;
case LayerBlendMode::divide: result[channel] = s <= 0 ? 1 : std::min(1.0, b / s); break;
default: break;
}
}
@@ -140,7 +154,10 @@ void BlendModeTests::everyBlendModeMatchesThePdfFormulas_data()
{"overlay", LayerBlendMode::overlay}, {"softLight", LayerBlendMode::softLight}, {"darken", LayerBlendMode::darken}, {"lighten", LayerBlendMode::lighten},
{"difference", LayerBlendMode::difference}, {"colorDodge", LayerBlendMode::colorDodge},
{"colorBurn", LayerBlendMode::colorBurn}, {"hue", LayerBlendMode::hue}, {"saturation", LayerBlendMode::saturation},
{"color", LayerBlendMode::color}, {"luminosity", LayerBlendMode::luminosity}};
{"color", LayerBlendMode::color}, {"luminosity", LayerBlendMode::luminosity}, {"hardLight", LayerBlendMode::hardLight},
{"exclusion", LayerBlendMode::exclusion}, {"linearBurn", LayerBlendMode::linearBurn}, {"linearDodge", LayerBlendMode::linearDodge},
{"vividLight", LayerBlendMode::vividLight}, {"linearLight", LayerBlendMode::linearLight}, {"pinLight", LayerBlendMode::pinLight},
{"hardMix", LayerBlendMode::hardMix}, {"subtract", LayerBlendMode::subtract}, {"divide", LayerBlendMode::divide}};
for (const auto &[name, mode] : modes)
QTest::newRow(name) << mode;
}
@@ -224,6 +241,10 @@ void BlendModeTests::hslBlendChecksItsInputs()
QVERIFY(HslBlend::handles(LayerBlendMode::hue) && HslBlend::handles(LayerBlendMode::saturation));
QVERIFY(HslBlend::handles(LayerBlendMode::color) && HslBlend::handles(LayerBlendMode::luminosity));
QVERIFY(!HslBlend::handles(LayerBlendMode::normal) && !HslBlend::handles(LayerBlendMode::colorBurn));
QVERIFY(!HslBlend::handles(LayerBlendMode::hardLight) && !HslBlend::handles(LayerBlendMode::exclusion));
for (const LayerBlendMode mode : {LayerBlendMode::linearBurn, LayerBlendMode::linearDodge, LayerBlendMode::vividLight, LayerBlendMode::linearLight,
LayerBlendMode::pinLight, LayerBlendMode::hardMix, LayerBlendMode::subtract, LayerBlendMode::divide})
QVERIFY(HslBlend::handles(mode));
const QImage large(8192, 8192, QImage::Format_RGBA8888_Premultiplied), other(8192, 8192, QImage::Format_RGBA8888_Premultiplied);
std::optional<AddressSpaceLimit> limit(std::in_place, 16 * 1024 * 1024);