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https://github.com/LadybirdBrowser/ladybird.git
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637fd51595
Represent WebIDL C++ types with a single CppType model that tracks nullability, optional presence, and contained storage. GC-like values now use GC::Ref/GC::Ptr directly, while containers choose "plain", "Root", or "Conservative" container types depending on what they contain. For example, sequence<Element> becomes a RootVector of GC::Ref values, while sequence<SomeDictionary> becomes a ConservativeVector only when the dictionary contains GC-like values. This moves the generated bindings away from wrapping GC values in GC::Root by default. This has broad fallout as the types passed to interfaces for GC objects changes almost fully across the board.
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
/*
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* Copyright (c) 2025, Ladybird contributors
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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 <LibGfx/Forward.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/Bindings/Transferable.h>
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#include <LibWeb/DOM/EventTarget.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/WebIDL/Types.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/canvas.html#offscreenrenderingcontext
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// NOTE: This is the Variant created by the IDL wrapper generator, and needs to be updated accordingly.
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using OffscreenRenderingContext = Variant<GC::Ref<OffscreenCanvasRenderingContext2D>, GC::Ref<WebGL::WebGLRenderingContext>, GC::Ref<WebGL::WebGL2RenderingContext>, Empty>;
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// https://html.spec.whatwg.org/multipage/canvas.html#offscreencanvas
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class OffscreenCanvas : public DOM::EventTarget
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, public Web::Bindings::Transferable {
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WEB_PLATFORM_OBJECT(OffscreenCanvas, DOM::EventTarget);
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GC_DECLARE_ALLOCATOR(OffscreenCanvas);
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public:
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static GC::Ref<OffscreenCanvas> create(JS::Realm&, WebIDL::UnsignedLong width, WebIDL::UnsignedLong height);
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static WebIDL::ExceptionOr<GC::Ref<OffscreenCanvas>> construct_impl(
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JS::Realm&,
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WebIDL::UnsignedLong width,
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WebIDL::UnsignedLong height);
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virtual ~OffscreenCanvas() override;
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// ^Web::Bindings::Transferable
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virtual WebIDL::ExceptionOr<void> transfer_steps(HTML::TransferDataEncoder&) override;
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virtual WebIDL::ExceptionOr<void> transfer_receiving_steps(HTML::TransferDataDecoder&) override;
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virtual HTML::TransferType primary_interface() const override;
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WebIDL::UnsignedLong width() const;
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WebIDL::UnsignedLong height() const;
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RefPtr<Gfx::Bitmap> bitmap() const;
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WebIDL::ExceptionOr<void> set_width(WebIDL::UnsignedLong);
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WebIDL::ExceptionOr<void> set_height(WebIDL::UnsignedLong);
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Gfx::IntSize bitmap_size_for_canvas() const;
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JS::ThrowCompletionOr<OffscreenRenderingContext> get_context(Bindings::OffscreenRenderingContextId contextId, JS::Value options);
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WebIDL::ExceptionOr<GC::Ref<ImageBitmap>> transfer_to_image_bitmap();
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GC::Ref<WebIDL::Promise> convert_to_blob(Optional<Bindings::ImageEncodeOptions> options);
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void set_oncontextlost(GC::Ptr<WebIDL::CallbackType>);
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GC::Ptr<WebIDL::CallbackType> oncontextlost();
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void set_oncontextrestored(GC::Ptr<WebIDL::CallbackType>);
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GC::Ptr<WebIDL::CallbackType> oncontextrestored();
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CSS::ComputationContext canvas_font_computation_context() const;
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private:
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OffscreenCanvas(JS::Realm&, RefPtr<Gfx::Bitmap> bitmap);
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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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enum class HasOrCreatedContext {
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No,
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Yes,
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};
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JS::ThrowCompletionOr<HasOrCreatedContext> create_2d_context(JS::Value options);
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void reset_context_to_default_state();
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WebIDL::ExceptionOr<void> set_new_bitmap_size(Gfx::IntSize new_size);
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Variant<GC::Ref<HTML::OffscreenCanvasRenderingContext2D>, GC::Ref<WebGL::WebGLRenderingContext>, GC::Ref<WebGL::WebGL2RenderingContext>, Empty> m_context;
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RefPtr<Gfx::Bitmap> m_bitmap;
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};
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}
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