f215d9bb9a
Compositor-backed canvas contexts keep their transports tied to a single Compositor connection. When that connection dies, the 2D backing storage and WebGL GL objects disappear with it, but WebContent does not surface the loss to canvas contexts or create fresh host contexts after reconnect. Track compositor loss through the WebContent connection, mark WebGL contexts lost, dispatch the standard context events, and rebuild the remote proxy when the page opts into restoration. For 2D canvas, queue the canvas context loss steps, discard the dead backing storage, and create new storage before firing contextrestored.
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/HTML/Canvas/AbstractCanvasMixin.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/canvas.html#canvasstate
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class CanvasState : protected virtual AbstractCanvasMixin {
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public:
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virtual ~CanvasState() = default;
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void save();
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void restore();
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void reset();
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bool is_context_lost();
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DrawingState& drawing_state() override { return m_drawing_state; }
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DrawingState const& drawing_state() const override { return m_drawing_state; }
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CSS::ComputationContext computation_context_for_drawing_state() const override;
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void clear_drawing_state_stack() { m_drawing_state_stack.clear(); }
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void reset_drawing_state() { m_drawing_state = {}; }
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virtual void reset_to_default_state() = 0;
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void visit_edges(GC::Cell::Visitor& visitor)
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{
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m_drawing_state.visit_edges(visitor);
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for (auto& state : m_drawing_state_stack) {
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state.visit_edges(visitor);
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}
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}
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protected:
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CanvasState() = default;
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void set_context_lost(bool context_lost) { m_context_lost = context_lost; }
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private:
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DrawingState m_drawing_state;
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Vector<DrawingState> m_drawing_state_stack;
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// https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-context-lost
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bool m_context_lost { false };
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};
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}
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