Layer.h revision 0f2f5ff75b7b48ceb64270655ee6b62d09bf4d00 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_LAYER_H
18#define ANDROID_LAYER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <gui/SurfaceTexture.h>
24
25#include <utils/Timers.h>
26
27#include <ui/GraphicBuffer.h>
28#include <ui/PixelFormat.h>
29
30#include <gui/ISurfaceComposerClient.h>
31
32#include <EGL/egl.h>
33#include <EGL/eglext.h>
34#include <GLES/gl.h>
35#include <GLES/glext.h>
36
37#include "LayerBase.h"
38#include "SurfaceTextureLayer.h"
39#include "Transform.h"
40
41namespace android {
42
43// ---------------------------------------------------------------------------
44
45class Client;
46class GLExtensions;
47
48// ---------------------------------------------------------------------------
49
50class Layer : public LayerBaseClient
51{
52public:
53            Layer(SurfaceFlinger* flinger, DisplayID display,
54                    const sp<Client>& client);
55
56    virtual ~Layer();
57
58    virtual const char* getTypeId() const { return "Layer"; }
59
60    // the this layer's size and format
61    status_t setBuffers(uint32_t w, uint32_t h,
62            PixelFormat format, uint32_t flags=0);
63
64    bool isFixedSize() const;
65
66    // LayerBase interface
67    virtual void setGeometry(const DisplayDevice& hw,
68            HWComposer::HWCLayerInterface& layer);
69    virtual void setPerFrameData(HWComposer::HWCLayerInterface& layer);
70    virtual void setAcquireFence(HWComposer::HWCLayerInterface& layer);
71
72    virtual void onDraw(const DisplayDevice& hw, const Region& clip) const;
73    virtual uint32_t doTransaction(uint32_t transactionFlags);
74    virtual Region latchBuffer(bool& recomputeVisibleRegions);
75    virtual bool isOpaque() const;
76    virtual bool isSecure() const           { return mSecure; }
77    virtual bool isProtected() const;
78    virtual void onRemoved();
79    virtual sp<Layer> getLayer() const { return const_cast<Layer*>(this); }
80    virtual void setName(const String8& name);
81
82    // LayerBaseClient interface
83    virtual wp<IBinder> getSurfaceTextureBinder() const;
84
85    virtual void onLayerDisplayed(HWComposer::HWCLayerInterface* layer);
86    virtual bool onPreComposition();
87
88    // only for debugging
89    inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; }
90
91protected:
92    virtual void onFirstRef();
93    virtual void dump(String8& result, char* scratch, size_t size) const;
94    virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const;
95    virtual void clearStats();
96
97private:
98    friend class SurfaceTextureLayer;
99    void onFrameQueued();
100    virtual sp<ISurface> createSurface();
101    uint32_t getEffectiveUsage(uint32_t usage) const;
102    uint32_t getTransformHint() const;
103    bool isCropped() const;
104    Rect computeBufferCrop() const;
105    static bool getOpacityForFormat(uint32_t format);
106
107    // -----------------------------------------------------------------------
108
109    // constants
110    sp<SurfaceTexture> mSurfaceTexture;
111    GLuint mTextureName;
112
113    // thread-safe
114    volatile int32_t mQueuedFrames;
115
116    // main thread
117    sp<GraphicBuffer> mActiveBuffer;
118    Rect mCurrentCrop;
119    uint32_t mCurrentTransform;
120    uint32_t mCurrentScalingMode;
121    bool mCurrentOpacity;
122    bool mRefreshPending;
123    bool mFrameLatencyNeeded;
124    bool mNeedHwcFence;
125    int mFrameLatencyOffset;
126
127    struct Statistics {
128        Statistics() : timestamp(0), set(0), vsync(0) { }
129        nsecs_t timestamp;  // buffer timestamp
130        nsecs_t set;        // buffer displayed timestamp
131        nsecs_t vsync;      // vsync immediately before set
132    };
133
134    // protected by mLock
135    Statistics mFrameStats[128];
136
137    // constants
138    PixelFormat mFormat;
139    const GLExtensions& mGLExtensions;
140    bool mOpaqueLayer;
141
142    // page-flip thread (currently main thread)
143    bool mSecure;         // no screenshots
144    bool mProtectedByApp; // application requires protected path to external sink
145};
146
147// ---------------------------------------------------------------------------
148
149}; // namespace android
150
151#endif // ANDROID_LAYER_H
152