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ebdc4b2408
ImageEncoder::ExtractDataInternal takes a `const nsAString&` for its options, but flattens it into a null-terminated `nsString` so callees can take a `char16_t*`. But nearly all of those callees eventually wind up calling ImageEncoder::GetInputStream, which just constructs an `nsDependentString` from the passed character pointer. There's no reason to do all this extra work. We can just pass the original options reference all the way through the stack and avoid needless conversions. Differential Revision: https://phabricator.services.mozilla.com/D26353 --HG-- extra : moz-landing-system : lando
100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
/* 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 ImageBitmapRenderingContext_h
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#define ImageBitmapRenderingContext_h
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#include "nsICanvasRenderingContextInternal.h"
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#include "nsWrapperCache.h"
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namespace mozilla {
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namespace gfx {
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class DataSourceSurface;
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class DrawTarget;
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class SourceSurface;
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} // namespace gfx
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namespace layers {
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class Image;
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class ImageContainer;
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} // namespace layers
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namespace dom {
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/**
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* The purpose of ImageBitmapRenderingContext is to provide a faster and
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* efficient way to display ImageBitmap. Simply call TransferFromImageBitmap()
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* then we'll transfer the surface of ImageBitmap to this context and then to
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* use it to display.
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*
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* See more details in spec: https://wiki.whatwg.org/wiki/OffscreenCanvas
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*/
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class ImageBitmapRenderingContext final
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: public nsICanvasRenderingContextInternal,
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public nsWrapperCache {
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virtual ~ImageBitmapRenderingContext();
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public:
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ImageBitmapRenderingContext();
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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// nsISupports interface + CC
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(ImageBitmapRenderingContext)
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void TransferImageBitmap(ImageBitmap& aImageBitmap);
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void TransferFromImageBitmap(ImageBitmap& aImageBitmap);
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// nsICanvasRenderingContextInternal
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virtual int32_t GetWidth() override { return mWidth; }
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virtual int32_t GetHeight() override { return mHeight; }
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NS_IMETHOD SetDimensions(int32_t aWidth, int32_t aHeight) override;
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NS_IMETHOD InitializeWithDrawTarget(
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nsIDocShell* aDocShell, NotNull<gfx::DrawTarget*> aTarget) override;
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virtual mozilla::UniquePtr<uint8_t[]> GetImageBuffer(
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int32_t* aFormat) override;
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NS_IMETHOD GetInputStream(const char* aMimeType,
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const nsAString& aEncoderOptions,
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nsIInputStream** aStream) override;
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virtual already_AddRefed<mozilla::gfx::SourceSurface> GetSurfaceSnapshot(
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gfxAlphaType* aOutAlphaType) override;
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virtual void SetOpaqueValueFromOpaqueAttr(bool aOpaqueAttrValue) override;
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virtual bool GetIsOpaque() override;
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NS_IMETHOD Reset() override;
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virtual already_AddRefed<Layer> GetCanvasLayer(
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nsDisplayListBuilder* aBuilder, Layer* aOldLayer,
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LayerManager* aManager) override;
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virtual void MarkContextClean() override;
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NS_IMETHOD Redraw(const gfxRect& aDirty) override;
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NS_IMETHOD SetIsIPC(bool aIsIPC) override;
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virtual void DidRefresh() override;
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virtual void MarkContextCleanForFrameCapture() override;
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virtual bool IsContextCleanForFrameCapture() override;
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protected:
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already_AddRefed<gfx::DataSourceSurface> MatchWithIntrinsicSize();
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already_AddRefed<layers::Image> ClipToIntrinsicSize();
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int32_t mWidth;
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int32_t mHeight;
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RefPtr<layers::Image> mImage;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* ImageBitmapRenderingContext_h */
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