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