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100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SurfaceFromElementResult_h
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#define mozilla_SurfaceFromElementResult_h
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#include "ImageContainer.h"
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#include "gfxTypes.h"
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#include "mozilla/gfx/Point.h"
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#include "nsCOMPtr.h"
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#include <cstdint>
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class imgIContainer;
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class imgIRequest;
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class nsIPrincipal;
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class nsLayoutUtils;
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namespace mozilla {
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namespace dom {
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class CanvasRenderingContext2D;
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}
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namespace gfx {
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class SourceSurface;
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}
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struct DirectDrawInfo {
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/* imgIContainer to directly draw to a context */
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nsCOMPtr<imgIContainer> mImgContainer;
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/* which frame to draw */
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uint32_t mWhichFrame;
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/* imgIContainer flags to use when drawing */
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uint32_t mDrawingFlags;
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};
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struct SurfaceFromElementResult {
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friend class mozilla::dom::CanvasRenderingContext2D;
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friend class ::nsLayoutUtils;
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/* If SFEResult contains a valid surface, it either mLayersImage or
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* mSourceSurface will be non-null, and GetSourceSurface() will not be null.
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*
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* For valid surfaces, mSourceSurface may be null if mLayersImage is
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* non-null, but GetSourceSurface() will create mSourceSurface from
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* mLayersImage when called.
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*/
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/* Video elements (at least) often are already decoded as layers::Images. */
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RefPtr<mozilla::layers::Image> mLayersImage;
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protected:
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/* GetSourceSurface() fills this and returns its non-null value if this
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* SFEResult was successful. */
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RefPtr<mozilla::gfx::SourceSurface> mSourceSurface;
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public:
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/* Contains info for drawing when there is no mSourceSurface. */
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DirectDrawInfo mDrawInfo;
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/* The size of the surface */
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mozilla::gfx::IntSize mSize;
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/* The size the surface is intended to be rendered at */
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mozilla::gfx::IntSize mIntrinsicSize;
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/* The principal associated with the element whose surface was returned.
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If there is a surface, this will never be null. */
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nsCOMPtr<nsIPrincipal> mPrincipal;
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/* The image request, if the element is an nsIImageLoadingContent */
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nsCOMPtr<imgIRequest> mImageRequest;
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/* True if cross-origins redirects have been done in order to load this
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* resource */
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bool mHadCrossOriginRedirects;
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/* Whether the element was "write only", that is, the bits should not be
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* exposed to content */
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bool mIsWriteOnly;
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/* Whether the element was still loading. Some consumers need to handle
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this case specially. */
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bool mIsStillLoading;
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/* Whether the element has a valid size. */
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bool mHasSize;
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/* Whether the element used CORS when loading. */
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bool mCORSUsed;
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gfxAlphaType mAlphaType;
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// Methods:
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SurfaceFromElementResult();
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// Gets mSourceSurface, or makes a SourceSurface from mLayersImage.
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const RefPtr<mozilla::gfx::SourceSurface>& GetSourceSurface();
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};
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} // namespace mozilla
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#endif // mozilla_SurfaceFromElementResult_h
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