gfx/thebes/gfxDrawable.h@97036ab72558
gfx/thebes/gfxDrawable.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #ifndef GFX_DRAWABLE_H
7 #define GFX_DRAWABLE_H
9 #include "nsAutoPtr.h"
10 #include "gfxRect.h"
11 #include "gfxMatrix.h"
12 #include "GraphicsFilter.h"
13 #include "mozilla/gfx/2D.h"
15 class gfxASurface;
16 class gfxImageSurface;
17 class gfxContext;
18 class gfxPattern;
20 /**
21 * gfxDrawable
22 * An Interface representing something that has an intrinsic size and can draw
23 * itself repeatedly.
24 */
25 class gfxDrawable {
26 NS_INLINE_DECL_REFCOUNTING(gfxDrawable)
27 public:
28 gfxDrawable(const gfxIntSize aSize)
29 : mSize(aSize) {}
31 /**
32 * Draw into aContext filling aFillRect, possibly repeating, using aFilter.
33 * aTransform is a userspace to "image"space matrix. For example, if Draw
34 * draws using a gfxPattern, this is the matrix that should be set on the
35 * pattern prior to rendering it.
36 * @return whether drawing was successful
37 */
38 virtual bool Draw(gfxContext* aContext,
39 const gfxRect& aFillRect,
40 bool aRepeat,
41 const GraphicsFilter& aFilter,
42 const gfxMatrix& aTransform = gfxMatrix()) = 0;
43 virtual already_AddRefed<gfxImageSurface> GetAsImageSurface() { return nullptr; }
44 virtual gfxIntSize Size() { return mSize; }
46 protected:
47 // Protected destructor, to discourage deletion outside of Release():
48 virtual ~gfxDrawable() {}
50 const gfxIntSize mSize;
51 };
53 /**
54 * gfxSurfaceDrawable
55 * A convenience implementation of gfxDrawable for surfaces.
56 */
57 class gfxSurfaceDrawable : public gfxDrawable {
58 public:
59 gfxSurfaceDrawable(gfxASurface* aSurface, const gfxIntSize aSize,
60 const gfxMatrix aTransform = gfxMatrix());
61 gfxSurfaceDrawable(mozilla::gfx::DrawTarget* aDT, const gfxIntSize aSize,
62 const gfxMatrix aTransform = gfxMatrix());
63 gfxSurfaceDrawable(mozilla::gfx::SourceSurface* aSurface, const gfxIntSize aSize,
64 const gfxMatrix aTransform = gfxMatrix());
65 virtual ~gfxSurfaceDrawable() {}
67 virtual bool Draw(gfxContext* aContext,
68 const gfxRect& aFillRect,
69 bool aRepeat,
70 const GraphicsFilter& aFilter,
71 const gfxMatrix& aTransform = gfxMatrix());
73 virtual already_AddRefed<gfxImageSurface> GetAsImageSurface();
75 protected:
76 nsRefPtr<gfxASurface> mSurface;
77 mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;
78 mozilla::RefPtr<mozilla::gfx::SourceSurface> mSourceSurface;
79 const gfxMatrix mTransform;
80 };
82 /**
83 * gfxDrawingCallback
84 * A simple drawing functor.
85 */
86 class gfxDrawingCallback {
87 NS_INLINE_DECL_REFCOUNTING(gfxDrawingCallback)
88 protected:
89 // Protected destructor, to discourage deletion outside of Release():
90 virtual ~gfxDrawingCallback() {}
92 public:
93 /**
94 * Draw into aContext filling aFillRect using aFilter.
95 * aTransform is a userspace to "image"space matrix. For example, if Draw
96 * draws using a gfxPattern, this is the matrix that should be set on the
97 * pattern prior to rendering it.
98 * @return whether drawing was successful
99 */
100 virtual bool operator()(gfxContext* aContext,
101 const gfxRect& aFillRect,
102 const GraphicsFilter& aFilter,
103 const gfxMatrix& aTransform = gfxMatrix()) = 0;
105 };
107 /**
108 * gfxCallbackDrawable
109 * A convenience implementation of gfxDrawable for callbacks.
110 */
111 class gfxCallbackDrawable : public gfxDrawable {
112 public:
113 gfxCallbackDrawable(gfxDrawingCallback* aCallback, const gfxIntSize aSize);
114 virtual ~gfxCallbackDrawable() {}
116 virtual bool Draw(gfxContext* aContext,
117 const gfxRect& aFillRect,
118 bool aRepeat,
119 const GraphicsFilter& aFilter,
120 const gfxMatrix& aTransform = gfxMatrix());
122 protected:
123 already_AddRefed<gfxSurfaceDrawable> MakeSurfaceDrawable(const GraphicsFilter aFilter = GraphicsFilter::FILTER_FAST);
125 nsRefPtr<gfxDrawingCallback> mCallback;
126 nsRefPtr<gfxSurfaceDrawable> mSurfaceDrawable;
127 };
129 /**
130 * gfxPatternDrawable
131 * A convenience implementation of gfxDrawable for patterns.
132 */
133 class gfxPatternDrawable : public gfxDrawable {
134 public:
135 gfxPatternDrawable(gfxPattern* aPattern,
136 const gfxIntSize aSize);
137 virtual ~gfxPatternDrawable();
139 virtual bool Draw(gfxContext* aContext,
140 const gfxRect& aFillRect,
141 bool aRepeat,
142 const GraphicsFilter& aFilter,
143 const gfxMatrix& aTransform = gfxMatrix());
145 protected:
146 already_AddRefed<gfxCallbackDrawable> MakeCallbackDrawable();
148 nsRefPtr<gfxPattern> mPattern;
149 };
151 #endif /* GFX_DRAWABLE_H */
