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LibWeb: Delegate painting surface allocation to canvas's active context

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This change prepares for the addition of WebGL support, where painting
surface allocation process will differ from that of context2d.
This commit is contained in:
Aliaksandr Kalenik 2024-11-29 20:17:25 +01:00 • committed by Alexander Kalenik
commit f719b05ab9
Notes: github-actions[bot] 2024-12-03 22:37:53 +00:00
8 changed files with 116 additions and 67 deletions
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21
Libraries/LibWeb/HTML/HTMLCanvasElement.h
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@ -24,11 +24,14 @@ public:
virtual ~HTMLCanvasElement() override;
bool allocate_painting_surface(size_t minimum_width = 0, size_t minimum_height = 0);
RefPtr<Gfx::PaintingSurface> surface() { return m_surface; }
RefPtr<Gfx::PaintingSurface const> surface() const { return m_surface; }
Gfx::IntSize bitmap_size_for_canvas(size_t minimum_width = 0, size_t minimum_height = 0) const;
JS::ThrowCompletionOr<RenderingContext> get_context(String const& type, JS::Value options);
enum class HasOrCreatedContext {
No,
Yes,
};
HasOrCreatedContext create_2d_context();
WebIDL::UnsignedLong width() const;
WebIDL::UnsignedLong height() const;
@ -41,6 +44,9 @@ public:
void present();
RefPtr<Gfx::PaintingSurface> surface() const;
void allocate_painting_surface_if_needed();
private:
HTMLCanvasElement(DOM::Document&, DOM::QualifiedName);
@ -52,16 +58,9 @@ private:
virtual GC::Ptr<Layout::Node> create_layout_node(CSS::StyleProperties) override;
virtual void adjust_computed_style(CSS::StyleProperties&) override;
enum class HasOrCreatedContext {
No,
Yes,
};
HasOrCreatedContext create_2d_context();
JS::ThrowCompletionOr<HasOrCreatedContext> create_webgl_context(JS::Value options);
void reset_context_to_default_state();
RefPtr<Gfx::PaintingSurface> m_surface;
void notify_context_about_canvas_size_change();
Variant<GC::Ref<HTML::CanvasRenderingContext2D>, GC::Ref<WebGL::WebGLRenderingContext>, Empty> m_context;
};