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