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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_LAYER_H
#define ANDROID_LAYER_H
#include <stdint.h>
#include <sys/types.h>
#include <ui/GraphicBuffer.h>
#include <ui/PixelFormat.h>
#include <pixelflinger/pixelflinger.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <GLES/glext.h>
#include "LayerBase.h"
#include "Transform.h"
#include "TextureManager.h"
namespace android {
// ---------------------------------------------------------------------------
class FreezeLock;
class Client;
class GLExtensions;
class UserClient;
// ---------------------------------------------------------------------------
class Layer : public LayerBaseClient
{
public:
Layer(SurfaceFlinger* flinger, DisplayID display,
const sp<Client>& client);
virtual ~Layer();
virtual const char* getTypeId() const { return "Layer"; }
// the this layer's size and format
status_t setBuffers(uint32_t w, uint32_t h,
PixelFormat format, uint32_t flags=0);
// associate a UserClient to this Layer
status_t setToken(const sp<UserClient>& uc, SharedClient* sc, int32_t idx);
int32_t getToken() const;
sp<UserClient> getClient() const;
// Set this Layer's buffers size
void setBufferSize(uint32_t w, uint32_t h);
bool isFixedSize() const;
// LayerBase interface
virtual void setGeometry(hwc_layer_t* hwcl);
virtual void setPerFrameData(hwc_layer_t* hwcl);
virtual void drawForSreenShot() const;
virtual void onDraw(const Region& clip) const;
virtual uint32_t doTransaction(uint32_t transactionFlags);
virtual void lockPageFlip(bool& recomputeVisibleRegions);
virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
virtual void finishPageFlip();
virtual bool needsBlending() const { return mNeedsBlending; }
virtual bool needsDithering() const { return mNeedsDithering; }
virtual bool needsFiltering() const;
virtual bool isSecure() const { return mSecure; }
virtual sp<Surface> createSurface() const;
virtual status_t ditch();
virtual void onRemoved();
// only for debugging
inline sp<GraphicBuffer> getBuffer(int i) const {
return mBufferManager.getBuffer(i); }
// only for debugging
inline const sp<FreezeLock>& getFreezeLock() const {
return mFreezeLock; }
protected:
virtual void dump(String8& result, char* scratch, size_t size) const;
private:
void reloadTexture(const Region& dirty);
uint32_t getEffectiveUsage(uint32_t usage) const;
sp<GraphicBuffer> requestBuffer(int bufferIdx,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
status_t setBufferCount(int bufferCount);
// -----------------------------------------------------------------------
class SurfaceLayer : public LayerBaseClient::Surface {
public:
SurfaceLayer(const sp<SurfaceFlinger>& flinger, const sp<Layer>& owner);
~SurfaceLayer();
private:
virtual sp<GraphicBuffer> requestBuffer(int bufferIdx,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
virtual status_t setBufferCount(int bufferCount);
sp<Layer> getOwner() const {
return static_cast<Layer*>(Surface::getOwner().get());
}
};
friend class SurfaceLayer;
// -----------------------------------------------------------------------
class ClientRef {
ClientRef(const ClientRef& rhs);
ClientRef& operator = (const ClientRef& rhs);
mutable Mutex mLock;
// binder thread, page-flip thread
sp<SharedBufferServer> mControlBlock;
wp<UserClient> mUserClient;
int32_t mToken;
public:
ClientRef();
~ClientRef();
int32_t getToken() const;
sp<UserClient> getClient() const;
status_t setToken(const sp<UserClient>& uc,
const sp<SharedBufferServer>& sharedClient, int32_t token);
sp<UserClient> getUserClientUnsafe() const;
class Access {
Access(const Access& rhs);
Access& operator = (const Access& rhs);
sp<UserClient> mUserClientStrongRef;
sp<SharedBufferServer> mControlBlock;
public:
Access(const ClientRef& ref);
~Access();
inline SharedBufferServer* get() const { return mControlBlock.get(); }
};
friend class Access;
};
// -----------------------------------------------------------------------
class BufferManager {
static const size_t NUM_BUFFERS = 2;
struct BufferData {
sp<GraphicBuffer> buffer;
Image texture;
};
// this lock protect mBufferData[].buffer but since there
// is very little contention, we have only one like for
// the whole array, we also use it to protect mNumBuffers.
mutable Mutex mLock;
BufferData mBufferData[SharedBufferStack::NUM_BUFFER_MAX];
size_t mNumBuffers;
Texture mFailoverTexture;
TextureManager& mTextureManager;
ssize_t mActiveBuffer;
bool mFailover;
static status_t destroyTexture(Image* tex, EGLDisplay dpy);
public:
static size_t getDefaultBufferCount() { return NUM_BUFFERS; }
BufferManager(TextureManager& tm);
~BufferManager();
// detach/attach buffer from/to given index
sp<GraphicBuffer> detachBuffer(size_t index);
status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer);
// resize the number of active buffers
status_t resize(size_t size, const sp<SurfaceFlinger>& flinger,
EGLDisplay dpy);
// ----------------------------------------------
// must be called from GL thread
// set/get active buffer index
status_t setActiveBufferIndex(size_t index);
size_t getActiveBufferIndex() const;
// return the active buffer
sp<GraphicBuffer> getActiveBuffer() const;
// return the active texture (or fail-over)
Texture getActiveTexture() const;
// frees resources associated with all buffers
status_t destroy(EGLDisplay dpy);
// load bitmap data into the active buffer
status_t loadTexture(const Region& dirty, const GGLSurface& t);
// make active buffer an EGLImage if needed
status_t initEglImage(EGLDisplay dpy,
const sp<GraphicBuffer>& buffer);
// ----------------------------------------------
// only for debugging
sp<GraphicBuffer> getBuffer(size_t index) const;
};
// -----------------------------------------------------------------------
// thread-safe
ClientRef mUserClientRef;
// constants
sp<Surface> mSurface;
PixelFormat mFormat;
const GLExtensions& mGLExtensions;
bool mNeedsBlending;
bool mNeedsDithering;
// page-flip thread (currently main thread)
bool mSecure;
Region mPostedDirtyRegion;
// page-flip thread and transaction thread (currently main thread)
sp<FreezeLock> mFreezeLock;
// see threading usage in declaration
TextureManager mTextureManager;
BufferManager mBufferManager;
// binder thread, transaction thread
mutable Mutex mLock;
uint32_t mWidth;
uint32_t mHeight;
uint32_t mReqWidth;
uint32_t mReqHeight;
uint32_t mReqFormat;
bool mNeedsScaling;
bool mFixedSize;
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_LAYER_H
|
