/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef MOZILLA_DOM_CANVASRENDERINGCONTEXTHELPER_H_ #define MOZILLA_DOM_CANVASRENDERINGCONTEXTHELPER_H_ #include "mozilla/dom/BindingDeclarations.h" #include "mozilla/layers/LayersTypes.h" #include "nsSize.h" class nsICanvasRenderingContextInternal; class nsIGlobalObject; namespace mozilla { class ErrorResult; namespace dom { class BlobCallback; class EncodeCompleteCallback; enum class CanvasContextType : uint8_t { NoContext, Canvas2D, WebGL1, WebGL2, ImageBitmap }; /** * Povides common RenderingContext functionality used by both OffscreenCanvas * and HTMLCanvasElement. */ class CanvasRenderingContextHelper { public: virtual already_AddRefed<nsISupports> GetContext(JSContext* aCx, const nsAString& aContextId, JS::Handle<JS::Value> aContextOptions, ErrorResult& aRv); virtual bool GetOpaqueAttr() = 0; protected: virtual nsresult UpdateContext(JSContext* aCx, JS::Handle<JS::Value> aNewContextOptions, ErrorResult& aRvForDictionaryInit); virtual nsresult ParseParams(JSContext* aCx, const nsAString& aType, const JS::Value& aEncoderOptions, nsAString& outParams, bool* const outCustomParseOptions); void ToBlob(JSContext* aCx, nsIGlobalObject* global, BlobCallback& aCallback, const nsAString& aType, JS::Handle<JS::Value> aParams, ErrorResult& aRv); void ToBlob(JSContext* aCx, nsIGlobalObject* aGlobal, EncodeCompleteCallback* aCallback, const nsAString& aType, JS::Handle<JS::Value> aParams, ErrorResult& aRv); virtual already_AddRefed<nsICanvasRenderingContextInternal> CreateContext(CanvasContextType aContextType); already_AddRefed<nsICanvasRenderingContextInternal> CreateContextHelper(CanvasContextType aContextType, layers::LayersBackend aCompositorBackend); virtual nsIntSize GetWidthHeight() = 0; CanvasContextType mCurrentContextType; nsCOMPtr<nsICanvasRenderingContextInternal> mCurrentContext; }; } // namespace dom } // namespace mozilla #endif // MOZILLA_DOM_CANVASRENDERINGCONTEXTHELPER_H_