1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* -*- 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 HTMLCanvasElement;
} // 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 aCanvas element
* 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::HTMLCanvasElement* aCanvas,
gfx::DrawTarget* aTarget, SourceSurface* aSource,
const gfx::IntSize& aSize,
const gfx::IntSize& aIntrinsicSize,
const Maybe<gfx::IntRect>& aCropRect);
/**
* 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 aCanvas. This is
* required for CORS security.
*/
static SourceSurface* LookupCanvas(dom::Element* aImage,
dom::HTMLCanvasElement* aCanvas,
gfx::DrawTarget* aTarget,
gfx::IntSize* aSizeOut,
gfx::IntSize* aIntrinsicSizeOut,
Maybe<gfx::IntRect>* aCropRectOut);
};
} // namespace mozilla
#endif /* CANVASIMAGECACHE_H_ */
|
