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LibWeb: Hook up SVG component transfer filter to Skia

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Jelle Raaijmakers 2025-11-06 15:50:45 +01:00 • committed by Jelle Raaijmakers
parent 70e98e72a8
commit b4810f47a3
Notes: github-actions[bot] 2025-11-09 00:23:44 +00:00
8 changed files with 264 additions and 1 deletions
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23
Libraries/LibGfx/Filter.cpp
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@ -195,6 +195,29 @@ Filter Filter::color_matrix(float matrix[20], Optional<Filter const&> input)
return Filter(Impl::create(SkImageFilters::ColorFilter(SkColorFilters::Matrix(matrix), input_skia)));
}
Filter Filter::color_table(Optional<ReadonlyBytes> a, Optional<ReadonlyBytes> r, Optional<ReadonlyBytes> g,
Optional<ReadonlyBytes> b, Optional<Filter const&> input)
{
VERIFY(!a.has_value() || a->size() == 256);
VERIFY(!r.has_value() || r->size() == 256);
VERIFY(!g.has_value() || g->size() == 256);
VERIFY(!b.has_value() || b->size() == 256);
sk_sp<SkImageFilter> input_skia = input.has_value() ? input->m_impl->filter : nullptr;
auto* a_table = a.has_value() ? a->data() : nullptr;
auto* r_table = r.has_value() ? r->data() : nullptr;
auto* g_table = g.has_value() ? g->data() : nullptr;
auto* b_table = b.has_value() ? b->data() : nullptr;
// Color tables are applied in linear space by default, so we need to convert twice.
// FIXME: support sRGB space as well (i.e. don't perform these conversions).
auto srgb_to_linear = SkImageFilters::ColorFilter(SkColorFilters::SRGBToLinearGamma(), input_skia);
auto color_table = SkImageFilters::ColorFilter(SkColorFilters::TableARGB(a_table, r_table, g_table, b_table), srgb_to_linear);
auto linear_to_srgb = SkImageFilters::ColorFilter(SkColorFilters::LinearToSRGBGamma(), color_table);
return Filter(Impl::create(linear_to_srgb));
}
Filter Filter::saturate(float value, Optional<Filter const&> input)
{
sk_sp<SkImageFilter> input_skia = input.has_value() ? input->m_impl->filter : nullptr;