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LibWeb: Implement css gradient-interpolation-method

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This commit is contained in:
Gingeh 2025-02-19 21:02:12 +11:00 • committed by Sam Atkins
commit 31853c13d3
Notes: github-actions[bot] 2025-03-06 11:34:14 +00:00
35 changed files with 499 additions and 101 deletions
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72
Libraries/LibWeb/Painting/DisplayListPlayerSkia.cpp
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@ -315,6 +315,66 @@ static ColorStopList expand_repeat_length(ColorStopList const& color_stop_list,
return color_stop_list_with_expanded_repeat;
}
static SkGradientShader::Interpolation to_skia_interpolation(CSS::InterpolationMethod interpolation_method)
{
SkGradientShader::Interpolation interpolation;
switch (interpolation_method.color_space) {
case CSS::GradientSpace::sRGB:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kSRGB;
break;
case CSS::GradientSpace::sRGBLinear:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kSRGBLinear;
break;
case CSS::GradientSpace::Lab:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kLab;
break;
case CSS::GradientSpace::OKLab:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kOKLab;
break;
case CSS::GradientSpace::HSL:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kHSL;
break;
case CSS::GradientSpace::HWB:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kHWB;
break;
case CSS::GradientSpace::LCH:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kLCH;
break;
case CSS::GradientSpace::OKLCH:
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kOKLCH;
break;
case CSS::GradientSpace::DisplayP3:
case CSS::GradientSpace::A98RGB:
case CSS::GradientSpace::ProPhotoRGB:
case CSS::GradientSpace::Rec2020:
case CSS::GradientSpace::XYZD50:
case CSS::GradientSpace::XYZD65:
dbgln("FIXME: Unsupported gradient color space");
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kOKLab;
break;
}
switch (interpolation_method.hue_method) {
case CSS::HueMethod::Shorter:
interpolation.fHueMethod = SkGradientShader::Interpolation::HueMethod::kShorter;
break;
case CSS::HueMethod::Longer:
interpolation.fHueMethod = SkGradientShader::Interpolation::HueMethod::kLonger;
break;
case CSS::HueMethod::Increasing:
interpolation.fHueMethod = SkGradientShader::Interpolation::HueMethod::kIncreasing;
break;
case CSS::HueMethod::Decreasing:
interpolation.fHueMethod = SkGradientShader::Interpolation::HueMethod::kDecreasing;
break;
}
interpolation.fInPremul = SkGradientShader::Interpolation::InPremul::kYes;
return interpolation;
}
void DisplayListPlayerSkia::paint_linear_gradient(PaintLinearGradient const& command)
{
auto const& linear_gradient_data = command.linear_gradient_data;
@ -351,9 +411,7 @@ void DisplayListPlayerSkia::paint_linear_gradient(PaintLinearGradient const& com
matrix.setRotate(linear_gradient_data.gradient_angle, center.x(), center.y());
auto color_space = SkColorSpace::MakeSRGB();
SkGradientShader::Interpolation interpolation = {};
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kSRGB;
interpolation.fInPremul = SkGradientShader::Interpolation::InPremul::kYes;
auto interpolation = to_skia_interpolation(linear_gradient_data.interpolation_method);
auto shader = SkGradientShader::MakeLinear(points.data(), colors.data(), color_space, positions.data(), positions.size(), SkTileMode::kClamp, interpolation, &matrix);
SkPaint paint;
@ -766,9 +824,7 @@ void DisplayListPlayerSkia::paint_radial_gradient(PaintRadialGradient const& com
tile_mode = SkTileMode::kRepeat;
auto color_space = SkColorSpace::MakeSRGB();
SkGradientShader::Interpolation interpolation = {};
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kSRGB;
interpolation.fInPremul = SkGradientShader::Interpolation::InPremul::kYes;
auto interpolation = to_skia_interpolation(radial_gradient_data.interpolation_method);
auto shader = SkGradientShader::MakeRadial(center, size.height(), colors.data(), color_space, positions.data(), positions.size(), tile_mode, interpolation, &matrix);
SkPaint paint;
@ -805,9 +861,7 @@ void DisplayListPlayerSkia::paint_conic_gradient(PaintConicGradient const& comma
SkMatrix matrix;
matrix.setRotate(-90 + conic_gradient_data.start_angle, center.x(), center.y());
auto color_space = SkColorSpace::MakeSRGB();
SkGradientShader::Interpolation interpolation = {};
interpolation.fColorSpace = SkGradientShader::Interpolation::ColorSpace::kSRGB;
interpolation.fInPremul = SkGradientShader::Interpolation::InPremul::kYes;
auto interpolation = to_skia_interpolation(conic_gradient_data.interpolation_method);
auto shader = SkGradientShader::MakeSweep(center.x(), center.y(), colors.data(), color_space, positions.data(), positions.size(), SkTileMode::kRepeat, 0, 360, interpolation, &matrix);
SkPaint paint;