Layer.h revision 54cc83e8a48c57307cdd40fe4b7e296020490095
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 <ui/GraphicBuffer.h> 24#include <ui/PixelFormat.h> 25#include <pixelflinger/pixelflinger.h> 26 27#include <EGL/egl.h> 28#include <EGL/eglext.h> 29#include <GLES/gl.h> 30#include <GLES/glext.h> 31 32#include "LayerBase.h" 33#include "Transform.h" 34#include "TextureManager.h" 35 36namespace android { 37 38// --------------------------------------------------------------------------- 39 40class FreezeLock; 41class Client; 42class GLExtensions; 43class UserClient; 44 45// --------------------------------------------------------------------------- 46 47class Layer : public LayerBaseClient 48{ 49public: 50 Layer(SurfaceFlinger* flinger, DisplayID display, 51 const sp<Client>& client); 52 53 virtual ~Layer(); 54 55 virtual const char* getTypeId() const { return "Layer"; } 56 57 // the this layer's size and format 58 status_t setBuffers(uint32_t w, uint32_t h, 59 PixelFormat format, uint32_t flags=0); 60 61 // associate a UserClient to this Layer 62 status_t setToken(const sp<UserClient>& uc, SharedClient* sc, int32_t idx); 63 int32_t getToken() const; 64 sp<UserClient> getClient() const; 65 66 // Set this Layer's buffers size 67 void setBufferSize(uint32_t w, uint32_t h); 68 bool isFixedSize() const; 69 70 // LayerBase interface 71 virtual void setGeometry(hwc_layer_t* hwcl); 72 virtual void setPerFrameData(hwc_layer_t* hwcl); 73 virtual void drawForSreenShot() const; 74 virtual void onDraw(const Region& clip) const; 75 virtual uint32_t doTransaction(uint32_t transactionFlags); 76 virtual void lockPageFlip(bool& recomputeVisibleRegions); 77 virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion); 78 virtual void finishPageFlip(); 79 virtual bool needsBlending() const { return mNeedsBlending; } 80 virtual bool needsDithering() const { return mNeedsDithering; } 81 virtual bool needsFiltering() const; 82 virtual bool isSecure() const { return mSecure; } 83 virtual sp<Surface> createSurface() const; 84 virtual status_t ditch(); 85 virtual void onRemoved(); 86 87 // only for debugging 88 inline sp<GraphicBuffer> getBuffer(int i) const { 89 return mBufferManager.getBuffer(i); } 90 // only for debugging 91 inline const sp<FreezeLock>& getFreezeLock() const { 92 return mFreezeLock; } 93 94protected: 95 virtual void dump(String8& result, char* scratch, size_t size) const; 96 97private: 98 void reloadTexture(const Region& dirty); 99 uint32_t getEffectiveUsage(uint32_t usage) const; 100 sp<GraphicBuffer> requestBuffer(int bufferIdx, 101 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 102 status_t setBufferCount(int bufferCount); 103 104 // ----------------------------------------------------------------------- 105 106 class SurfaceLayer : public LayerBaseClient::Surface { 107 public: 108 SurfaceLayer(const sp<SurfaceFlinger>& flinger, const sp<Layer>& owner); 109 ~SurfaceLayer(); 110 private: 111 virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, 112 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 113 virtual status_t setBufferCount(int bufferCount); 114 sp<Layer> getOwner() const { 115 return static_cast<Layer*>(Surface::getOwner().get()); 116 } 117 }; 118 friend class SurfaceLayer; 119 120 // ----------------------------------------------------------------------- 121 122 class ClientRef { 123 ClientRef(const ClientRef& rhs); 124 ClientRef& operator = (const ClientRef& rhs); 125 mutable Mutex mLock; 126 // binder thread, page-flip thread 127 sp<SharedBufferServer> mControlBlock; 128 wp<UserClient> mUserClient; 129 int32_t mToken; 130 public: 131 ClientRef(); 132 ~ClientRef(); 133 int32_t getToken() const; 134 sp<UserClient> getClient() const; 135 status_t setToken(const sp<UserClient>& uc, 136 const sp<SharedBufferServer>& sharedClient, int32_t token); 137 sp<UserClient> getUserClientUnsafe() const; 138 class Access { 139 Access(const Access& rhs); 140 Access& operator = (const Access& rhs); 141 sp<UserClient> mUserClientStrongRef; 142 sp<SharedBufferServer> mControlBlock; 143 public: 144 Access(const ClientRef& ref); 145 ~Access(); 146 inline SharedBufferServer* get() const { return mControlBlock.get(); } 147 }; 148 friend class Access; 149 }; 150 151 // ----------------------------------------------------------------------- 152 153 class BufferManager { 154 static const size_t NUM_BUFFERS = 2; 155 struct BufferData { 156 sp<GraphicBuffer> buffer; 157 Image texture; 158 }; 159 // this lock protect mBufferData[].buffer but since there 160 // is very little contention, we have only one like for 161 // the whole array, we also use it to protect mNumBuffers. 162 mutable Mutex mLock; 163 BufferData mBufferData[SharedBufferStack::NUM_BUFFER_MAX]; 164 size_t mNumBuffers; 165 Texture mFailoverTexture; 166 TextureManager& mTextureManager; 167 ssize_t mActiveBuffer; 168 bool mFailover; 169 static status_t destroyTexture(Image* tex, EGLDisplay dpy); 170 171 public: 172 static size_t getDefaultBufferCount() { return NUM_BUFFERS; } 173 BufferManager(TextureManager& tm); 174 ~BufferManager(); 175 176 // detach/attach buffer from/to given index 177 sp<GraphicBuffer> detachBuffer(size_t index); 178 status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer); 179 // resize the number of active buffers 180 status_t resize(size_t size, const sp<SurfaceFlinger>& flinger, 181 EGLDisplay dpy); 182 183 // ---------------------------------------------- 184 // must be called from GL thread 185 186 // set/get active buffer index 187 status_t setActiveBufferIndex(size_t index); 188 size_t getActiveBufferIndex() const; 189 // return the active buffer 190 sp<GraphicBuffer> getActiveBuffer() const; 191 // return the active texture (or fail-over) 192 Texture getActiveTexture() const; 193 // frees resources associated with all buffers 194 status_t destroy(EGLDisplay dpy); 195 // load bitmap data into the active buffer 196 status_t loadTexture(const Region& dirty, const GGLSurface& t); 197 // make active buffer an EGLImage if needed 198 status_t initEglImage(EGLDisplay dpy, 199 const sp<GraphicBuffer>& buffer); 200 201 // ---------------------------------------------- 202 // only for debugging 203 sp<GraphicBuffer> getBuffer(size_t index) const; 204 }; 205 206 // ----------------------------------------------------------------------- 207 208 // thread-safe 209 ClientRef mUserClientRef; 210 211 // constants 212 sp<Surface> mSurface; 213 PixelFormat mFormat; 214 const GLExtensions& mGLExtensions; 215 bool mNeedsBlending; 216 bool mNeedsDithering; 217 218 // page-flip thread (currently main thread) 219 bool mSecure; 220 Region mPostedDirtyRegion; 221 222 // page-flip thread and transaction thread (currently main thread) 223 sp<FreezeLock> mFreezeLock; 224 225 // see threading usage in declaration 226 TextureManager mTextureManager; 227 BufferManager mBufferManager; 228 229 // binder thread, transaction thread 230 mutable Mutex mLock; 231 uint32_t mWidth; 232 uint32_t mHeight; 233 uint32_t mReqWidth; 234 uint32_t mReqHeight; 235 uint32_t mReqFormat; 236 bool mFixedSize; 237}; 238 239// --------------------------------------------------------------------------- 240 241}; // namespace android 242 243#endif // ANDROID_LAYER_H 244