gfx/layers/ipc/ShadowLayerUtilsGralloc.h@97036ab72558
gfx/layers/ipc/ShadowLayerUtilsGralloc.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: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * vim: sw=2 ts=8 et :
3 */
4 /* This Source Code Form is subject to the terms of the Mozilla Public
5 * License, v. 2.0. If a copy of the MPL was not distributed with this
6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
8 #ifndef mozilla_layers_ShadowLayerUtilsGralloc_h
9 #define mozilla_layers_ShadowLayerUtilsGralloc_h
11 #include <unistd.h>
12 #include <ui/GraphicBuffer.h>
14 #include "ipc/IPCMessageUtils.h"
15 #include "mozilla/layers/PGrallocBufferChild.h"
16 #include "mozilla/layers/PGrallocBufferParent.h"
18 #define MOZ_HAVE_SURFACEDESCRIPTORGRALLOC
19 #define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS
21 namespace mozilla {
22 namespace layers {
24 class MaybeMagicGrallocBufferHandle;
25 class TextureHost;
27 /**
28 * This class exists to share the underlying GraphicBuffer resources
29 * from one thread context to another. This requires going through
30 * slow paths in the kernel so can be somewhat expensive.
31 *
32 * This is not just platform-specific, but also
33 * gralloc-implementation-specific.
34 */
35 struct MagicGrallocBufferHandle {
36 typedef android::GraphicBuffer GraphicBuffer;
38 MagicGrallocBufferHandle()
39 { }
41 MagicGrallocBufferHandle(const android::sp<GraphicBuffer>& aGraphicBuffer);
43 // Default copy ctor and operator= are OK
45 bool operator==(const MagicGrallocBufferHandle& aOther) const {
46 return mGraphicBuffer == aOther.mGraphicBuffer;
47 }
49 android::sp<GraphicBuffer> mGraphicBuffer;
50 };
52 /**
53 * GrallocBufferActor is an "IPC wrapper" for an underlying
54 * GraphicBuffer (pmem region). It allows us to cheaply and
55 * conveniently share gralloc handles between processes.
56 */
57 class GrallocBufferActor : public PGrallocBufferChild
58 , public PGrallocBufferParent
59 {
60 friend class ShadowLayerForwarder;
61 friend class LayerManagerComposite;
62 friend class ImageBridgeChild;
63 typedef android::GraphicBuffer GraphicBuffer;
65 public:
66 virtual ~GrallocBufferActor();
68 static PGrallocBufferParent*
69 Create(const gfx::IntSize& aSize,
70 const uint32_t& aFormat,
71 const uint32_t& aUsage,
72 MaybeMagicGrallocBufferHandle* aOutHandle);
74 static PGrallocBufferChild*
75 Create();
77 // used only for hacky fix in gecko 23 for bug 862324
78 // see bug 865908 about fixing this.
79 void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE;
81 void AddTextureHost(TextureHost* aTextureHost);
82 void RemoveTextureHost();
84 android::GraphicBuffer* GetGraphicBuffer();
86 void InitFromHandle(const MagicGrallocBufferHandle& aHandle);
88 private:
89 GrallocBufferActor();
91 android::sp<GraphicBuffer> mGraphicBuffer;
93 // This value stores the number of bytes allocated in this
94 // BufferActor. This will be used for the memory reporter.
95 size_t mAllocBytes;
97 // Used only for hacky fix for bug 966446.
98 TextureHost* mTextureHost;
100 friend class ISurfaceAllocator;
101 };
103 } // namespace layers
104 } // namespace mozilla
106 namespace IPC {
108 template <>
109 struct ParamTraits<mozilla::layers::MagicGrallocBufferHandle> {
110 typedef mozilla::layers::MagicGrallocBufferHandle paramType;
112 static void Write(Message* aMsg, const paramType& aParam);
113 static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
114 };
116 } // namespace IPC
118 #endif // mozilla_layers_ShadowLayerUtilsGralloc_h
