/* -*- 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 CANVASIMAGECACHE_H_
#define CANVASIMAGECACHE_H_
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "mozilla/gfx/Rect.h"
#include "nsSize.h"
namespace mozilla {
namespace dom {
class Element;
class CanvasRenderingContext2D;
}
// namespace dom
namespace gfx {
class DrawTarget;
class SourceSurface;
}
// namespace gfx
}
// namespace mozilla
class imgIContainer;
namespace mozilla {
class CanvasImageCache {
using SourceSurface = mozilla::gfx::SourceSurface;
public:
/**
* Notify that image element aImage was drawn to aContext canvas
* using the first frame of aRequest's image. The data for the surface is
* in aSurface, and the image size is in aSize. aIntrinsicSize is the size
* the surface is intended to be rendered at.
*/
static void NotifyDrawImage(dom::Element* aImage,
dom::CanvasRenderingContext2D* aContext,
gfx::DrawTarget* aTarget, SourceSurface* aSource,
const gfx::IntSize& aSize,
const gfx::IntSize& aIntrinsicSize,
const Maybe<gfx::IntRect>& aCropRect);
/**
* Notify that aContext is being destroyed.
*/
static void NotifyCanvasDestroyed(dom::CanvasRenderingContext2D* aContext);
/**
* Check whether aImage has recently been drawn any canvas. If we return
* a non-null surface, then the same image was recently drawn into a canvas.
*/
static SourceSurface* LookupAllCanvas(dom::Element* aImage,
gfx::DrawTarget* aTarget);
/**
* Like the top above, but restricts the lookup to only aContext. This is
* required for CORS security.
*/
static SourceSurface* LookupCanvas(dom::Element* aImage,
dom::CanvasRenderingContext2D* aContext,
gfx::DrawTarget* aTarget,
gfx::IntSize* aSizeOut,
gfx::IntSize* aIntrinsicSizeOut,
Maybe<gfx::IntRect>* aCropRectOut);
};
}
// namespace mozilla
#endif /* CANVASIMAGECACHE_H_ */
