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https://github.com/RGBCube/serenity
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4507920187
This fixes the Serenity logo vanishing after scrolling on the 4th birthday post. The previous check did not account for any translation in the painter. This now uses the painter's clip rect and translation to work out if a rect is visible. It also makes use of `absolute_paint_rect()` rather than `absolute_rect()` which can account for things like box-shadows.
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
/*
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* Copyright (c) 2022, 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/Painting/CanvasPaintable.h>
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namespace Web::Painting {
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NonnullRefPtr<CanvasPaintable> CanvasPaintable::create(Layout::CanvasBox const& layout_box)
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{
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return adopt_ref(*new CanvasPaintable(layout_box));
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}
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CanvasPaintable::CanvasPaintable(Layout::CanvasBox const& layout_box)
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: PaintableBox(layout_box)
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{
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}
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Layout::CanvasBox const& CanvasPaintable::layout_box() const
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{
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return static_cast<Layout::CanvasBox const&>(layout_node());
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}
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void CanvasPaintable::paint(PaintContext& context, PaintPhase phase) const
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{
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if (!layout_box().is_visible())
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return;
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PaintableBox::paint(context, phase);
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if (phase == PaintPhase::Foreground) {
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auto canvas_rect = absolute_rect().to_rounded<int>();
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ScopedCornerRadiusClip corner_clip { context.painter(), canvas_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };
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// FIXME: This should be done at a different level.
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if (is_out_of_view(context))
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return;
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if (layout_box().dom_node().bitmap()) {
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// FIXME: Remove this const_cast.
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const_cast<HTML::HTMLCanvasElement&>(layout_box().dom_node()).present();
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context.painter().draw_scaled_bitmap(canvas_rect, *layout_box().dom_node().bitmap(), layout_box().dom_node().bitmap()->rect(), 1.0f, to_gfx_scaling_mode(computed_values().image_rendering()));
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}
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}
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}
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}
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