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LibWeb: Apply stacking context transform in GPU painter

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Aliaksandr Kalenik 2023-11-28 19:00:52 +01:00 • committed by Andreas Kling
parent aaf54f8cf8
commit 9fa6628efa
1 changed files with 11 additions and 3 deletions
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14
Userland/Libraries/LibWeb/Painting/PaintingCommandExecutorGPU.cpp
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@ -90,24 +90,32 @@ CommandResult PaintingCommandExecutorGPU::set_font(Gfx::Font const&)
return CommandResult::Continue;
}
CommandResult PaintingCommandExecutorGPU::push_stacking_context(float opacity, bool is_fixed_position, Gfx::IntRect const& source_paintable_rect, Gfx::IntPoint post_transform_translation, CSS::ImageRendering, StackingContextTransform, Optional<StackingContextMask>)
CommandResult PaintingCommandExecutorGPU::push_stacking_context(float opacity, bool is_fixed_position, Gfx::IntRect const& source_paintable_rect, Gfx::IntPoint post_transform_translation, CSS::ImageRendering, StackingContextTransform transform, Optional<StackingContextMask>)
{
painter().save();
if (is_fixed_position) {
auto const& translation = painter().transform().translation();
painter().translate(-translation);
}
auto affine_transform = Gfx::extract_2d_affine_transform(transform.matrix);
if (opacity < 1) {
auto painter = AccelGfx::Painter::create();
auto canvas = AccelGfx::Canvas::create(source_paintable_rect.size());
painter->set_target_canvas(canvas);
painter->translate(-source_paintable_rect.location().to_type<float>());
auto source_rect = source_paintable_rect.to_type<float>().translated(-transform.origin);
auto transformed_destination_rect = affine_transform.map(source_rect).translated(transform.origin);
auto destination_rect = transformed_destination_rect.to_rounded<int>();
stacking_contexts.append({ .canvas = canvas,
.painter = move(painter),
.opacity = opacity,
.destination = source_paintable_rect });
.destination = destination_rect });
} else {
painter().translate(post_transform_translation.to_type<float>());
painter().translate(affine_transform.translation() + post_transform_translation.to_type<float>());
}
return CommandResult::Continue;
}