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https://github.com/RGBCube/serenity
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1b3223dd9e
Using recording_painter() as a name is less misleading, indicating the painter in stacking context traversal doesn't perform actual painting commands.
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/*
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* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Layout/Viewport.h>
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#include <LibWeb/Painting/StackingContext.h>
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#include <LibWeb/Painting/ViewportPaintable.h>
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namespace Web::Painting {
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JS::NonnullGCPtr<ViewportPaintable> ViewportPaintable::create(Layout::Viewport const& layout_viewport)
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{
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return layout_viewport.heap().allocate_without_realm<ViewportPaintable>(layout_viewport);
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}
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ViewportPaintable::ViewportPaintable(Layout::Viewport const& layout_viewport)
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: PaintableWithLines(layout_viewport)
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{
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}
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ViewportPaintable::~ViewportPaintable() = default;
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void ViewportPaintable::build_stacking_context_tree_if_needed()
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{
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if (stacking_context())
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return;
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build_stacking_context_tree();
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}
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void ViewportPaintable::build_stacking_context_tree()
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{
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set_stacking_context(make<StackingContext>(*this, nullptr, 0));
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size_t index_in_tree_order = 1;
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for_each_in_subtree_of_type<PaintableBox>([&](PaintableBox const& paintable) {
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auto& paintable_box = const_cast<PaintableBox&>(paintable);
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paintable_box.invalidate_stacking_context();
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if (!paintable_box.layout_box().establishes_stacking_context()) {
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VERIFY(!paintable_box.stacking_context());
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return TraversalDecision::Continue;
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}
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auto* parent_context = paintable_box.enclosing_stacking_context();
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VERIFY(parent_context);
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paintable_box.set_stacking_context(make<Painting::StackingContext>(paintable_box, parent_context, index_in_tree_order++));
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return TraversalDecision::Continue;
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});
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stacking_context()->sort();
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}
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void ViewportPaintable::paint_all_phases(PaintContext& context)
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{
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build_stacking_context_tree_if_needed();
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context.recording_painter().translate(-context.device_viewport_rect().location().to_type<int>());
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stacking_context()->paint(context);
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}
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}
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