Layer.h revision a4a3149a36bc69a06e4824aeae909ab910661070
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 public SurfaceTexture::FrameAvailableListener 52{ 53public: 54 Layer(SurfaceFlinger* flinger, const sp<Client>& client); 55 virtual ~Layer(); 56 57 virtual const char* getTypeId() const { return "Layer"; } 58 59 // the this layer's size and format 60 status_t setBuffers(uint32_t w, uint32_t h, 61 PixelFormat format, uint32_t flags=0); 62 63 bool isFixedSize() const; 64 65 // LayerBase interface 66 virtual void setGeometry(const sp<const DisplayDevice>& hw, 67 HWComposer::HWCLayerInterface& layer); 68 virtual void setPerFrameData(const sp<const DisplayDevice>& hw, 69 HWComposer::HWCLayerInterface& layer); 70 virtual void setAcquireFence(const sp<const DisplayDevice>& hw, 71 HWComposer::HWCLayerInterface& layer); 72 virtual void onLayerDisplayed(const sp<const DisplayDevice>& hw, 73 HWComposer::HWCLayerInterface* layer); 74 virtual bool onPreComposition(); 75 virtual void onPostComposition(); 76 77 virtual void onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const; 78 virtual uint32_t doTransaction(uint32_t transactionFlags); 79 virtual Region latchBuffer(bool& recomputeVisibleRegions); 80 virtual bool isOpaque() const; 81 virtual bool isSecure() const { return mSecure; } 82 virtual bool isProtected() const; 83 virtual void onRemoved(); 84 virtual sp<Layer> getLayer() const { return const_cast<Layer*>(this); } 85 virtual void setName(const String8& name); 86 virtual bool isVisible() const; 87 88 // LayerBaseClient interface 89 virtual wp<IBinder> getSurfaceTextureBinder() const; 90 91 // only for debugging 92 inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; } 93 94 // Updates the transform hint in our SurfaceTexture to match 95 // the current orientation of the default display device. 96 virtual void updateTransformHint() const; 97 98protected: 99 virtual void onFirstRef(); 100 virtual void dump(String8& result, char* scratch, size_t size) const; 101 virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const; 102 virtual void clearStats(); 103 104private: 105 friend class SurfaceTextureLayer; 106 virtual sp<ISurface> createSurface(); 107 uint32_t getEffectiveUsage(uint32_t usage) const; 108 bool isCropped() const; 109 Rect computeBufferCrop() const; 110 static bool getOpacityForFormat(uint32_t format); 111 112 // Interface implementation for SurfaceTexture::FrameAvailableListener 113 virtual void onFrameAvailable(); 114 115 // ----------------------------------------------------------------------- 116 117 // constants 118 sp<SurfaceTexture> mSurfaceTexture; 119 GLuint mTextureName; 120 121 // thread-safe 122 volatile int32_t mQueuedFrames; 123 124 // main thread 125 sp<GraphicBuffer> mActiveBuffer; 126 Rect mCurrentCrop; 127 uint32_t mCurrentTransform; 128 uint32_t mCurrentScalingMode; 129 bool mCurrentOpacity; 130 bool mRefreshPending; 131 bool mFrameLatencyNeeded; 132 int mFrameLatencyOffset; 133 134 struct Statistics { 135 Statistics() : timestamp(0), set(0), vsync(0) { } 136 nsecs_t timestamp; // buffer timestamp 137 nsecs_t set; // buffer displayed timestamp 138 nsecs_t vsync; // vsync immediately before set 139 }; 140 141 // protected by mLock 142 Statistics mFrameStats[128]; 143 144 // constants 145 PixelFormat mFormat; 146 const GLExtensions& mGLExtensions; 147 bool mOpaqueLayer; 148 149 // page-flip thread (currently main thread) 150 bool mSecure; // no screenshots 151 bool mProtectedByApp; // application requires protected path to external sink 152}; 153 154// --------------------------------------------------------------------------- 155 156}; // namespace android 157 158#endif // ANDROID_LAYER_H 159