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834202aeb9
This needs to happen before prototype/constructor intitialization can be made lazy. Otherwise, GC could run during the C++ constructor and try to collect the object currently being created.
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2020, 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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#pragma once
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#include <AK/ByteBuffer.h>
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#include <LibGfx/Forward.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/WebGL/WebGLRenderingContext.h>
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namespace Web::HTML {
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class HTMLCanvasElement final : public HTMLElement {
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WEB_PLATFORM_OBJECT(HTMLCanvasElement, HTMLElement);
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public:
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using RenderingContext = Variant<JS::Handle<CanvasRenderingContext2D>, JS::Handle<WebGL::WebGLRenderingContext>, Empty>;
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virtual ~HTMLCanvasElement() override;
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Gfx::Bitmap const* bitmap() const { return m_bitmap; }
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Gfx::Bitmap* bitmap() { return m_bitmap; }
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bool create_bitmap(size_t minimum_width = 0, size_t minimum_height = 0);
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JS::ThrowCompletionOr<RenderingContext> get_context(DeprecatedString const& type, JS::Value options);
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unsigned width() const;
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unsigned height() const;
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void set_width(unsigned);
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void set_height(unsigned);
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DeprecatedString to_data_url(DeprecatedString const& type, Optional<double> quality) const;
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void present();
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private:
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HTMLCanvasElement(DOM::Document&, DOM::QualifiedName);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
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enum class HasOrCreatedContext {
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No,
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Yes,
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};
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HasOrCreatedContext create_2d_context();
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JS::ThrowCompletionOr<HasOrCreatedContext> create_webgl_context(JS::Value options);
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void reset_context_to_default_state();
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RefPtr<Gfx::Bitmap> m_bitmap;
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Variant<JS::NonnullGCPtr<HTML::CanvasRenderingContext2D>, JS::NonnullGCPtr<WebGL::WebGLRenderingContext>, Empty> m_context;
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};
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}
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