a80babffb6
Canvas rendering is a major remaining path where WebContent directly owns GPU-facing drawing state. Back 2D and WebGL canvas contexts with remote Compositor transports, so WebContent talks to canvas surfaces through IPC while the Compositor owns the rasterization resources. This is a large step toward GPU sandboxing because canvas GPU work now lives behind the Compositor boundary. It also gives OffscreenCanvas the process-independent canvas plumbing that HTMLCanvasElement now uses, making worker-owned canvases possible without another WebContent-local rendering path.
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <andreas@ladybird.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/BorderRadiusCornerClipper.h>
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#include <LibWeb/Painting/CanvasPaintable.h>
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#include <LibWeb/Painting/DisplayListRecorder.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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void CanvasPaintable::paint(DisplayListRecordingContext& context, PaintPhase phase) const
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{
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if (!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 = context.rounded_device_rect(absolute_rect());
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ScopedCornerRadiusClip corner_clip { context, canvas_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };
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auto& canvas_element = as<HTML::HTMLCanvasElement>(*dom_node());
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if (auto content_size = canvas_element.canvas_surface_content_size(); content_size.has_value()) {
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auto canvas_id = canvas_element.canvas_id();
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VERIFY(canvas_id.has_value());
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auto canvas_int_rect = canvas_rect.to_type<int>();
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auto scaling_mode = to_gfx_scaling_mode(computed_values().image_rendering(),
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*content_size, canvas_int_rect.size());
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context.display_list_recorder().draw_canvas(canvas_int_rect,
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*canvas_id, scaling_mode);
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}
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}
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}
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}
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