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LibGfx/TinyVG: Map gradients to equivalent SVG gradients

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MacDue 2023-07-14 21:34:17 +01:00 • committed by Andreas Kling
parent fb61082a6c
commit a853f7b133
Notes: sideshowbarker 2024-07-17 11:30:05 +09:00
1 changed files with 21 additions and 10 deletions
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31
Userland/Libraries/LibGfx/ImageFormats/TinyVGLoader.cpp
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@ -207,19 +207,30 @@ public:
auto color_index = TRY(m_stream.read_value<VarUInt>());
return m_color_table[color_index];
};
auto read_gradient = [&]() -> ErrorOr<NonnullRefPtr<SVGGradientPaintStyle>> {
auto point_0 = TRY(read_point());
auto point_1 = TRY(read_point());
auto color_0 = TRY(read_color());
auto color_1 = TRY(read_color());
// Map TinyVG gradients to SVG gradients (since we already have those).
// This is not entirely consistent with the spec, which uses gamma sRGB for gradients
// (but this matches the TVG -> SVG renderings).
auto svg_gradient = TRY([&]() -> ErrorOr<NonnullRefPtr<SVGGradientPaintStyle>> {
if (type == StyleType::LinearGradient)
return TRY(SVGLinearGradientPaintStyle::create(point_0, point_1));
auto radius = point_1.distance_from(point_0);
return TRY(SVGRadialGradientPaintStyle::create(point_0, 0, point_0, radius));
}());
TRY(svg_gradient->add_color_stop(0, color_0));
TRY(svg_gradient->add_color_stop(1, color_1));
return svg_gradient;
};
switch (type) {
case StyleType::FlatColored: {
case StyleType::FlatColored:
return TRY(read_color());
}
case StyleType::LinearGradient:
case StyleType::RadialGradinet: {
// TODO: Make PaintStyle (for these ultra basic gradients)
[[maybe_unused]] auto point_0 = TRY(read_point());
[[maybe_unused]] auto point_1 = TRY(read_point());
[[maybe_unused]] auto color_0 = TRY(read_color());
[[maybe_unused]] auto color_1 = TRY(read_color());
return Color(Color::Black);
}
case StyleType::RadialGradinet:
return TRY(read_gradient());
}
return Error::from_string_literal("Invalid TinyVG: Bad style data");
}