Layer.h revision a350ff98692b3a50cad5cc93f9f83221242ca86a
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 onDraw(const Region& clip) const; 74 virtual uint32_t doTransaction(uint32_t transactionFlags); 75 virtual void lockPageFlip(bool& recomputeVisibleRegions); 76 virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion); 77 virtual void finishPageFlip(); 78 virtual bool needsBlending() const { return mNeedsBlending; } 79 virtual bool needsDithering() const { return mNeedsDithering; } 80 virtual bool needsFiltering() const; 81 virtual bool isSecure() const { return mSecure; } 82 virtual sp<Surface> createSurface() const; 83 virtual status_t ditch(); 84 virtual void onRemoved(); 85 86 // only for debugging 87 inline sp<GraphicBuffer> getBuffer(int i) const { 88 return mBufferManager.getBuffer(i); } 89 // only for debugging 90 inline const sp<FreezeLock>& getFreezeLock() const { 91 return mFreezeLock; } 92 93protected: 94 virtual void dump(String8& result, char* scratch, size_t size) const; 95 96private: 97 void reloadTexture(const Region& dirty); 98 uint32_t getEffectiveUsage(uint32_t usage) const; 99 sp<GraphicBuffer> requestBuffer(int bufferIdx, 100 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 101 status_t setBufferCount(int bufferCount); 102 103 // ----------------------------------------------------------------------- 104 105 class SurfaceLayer : public LayerBaseClient::Surface { 106 public: 107 SurfaceLayer(const sp<SurfaceFlinger>& flinger, const sp<Layer>& owner); 108 ~SurfaceLayer(); 109 private: 110 virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, 111 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 112 virtual status_t setBufferCount(int bufferCount); 113 sp<Layer> getOwner() const { 114 return static_cast<Layer*>(Surface::getOwner().get()); 115 } 116 }; 117 friend class SurfaceLayer; 118 119 // ----------------------------------------------------------------------- 120 121 class ClientRef { 122 ClientRef(const ClientRef& rhs); 123 ClientRef& operator = (const ClientRef& rhs); 124 mutable Mutex mLock; 125 // binder thread, page-flip thread 126 sp<SharedBufferServer> mControlBlock; 127 wp<UserClient> mUserClient; 128 int32_t mToken; 129 public: 130 ClientRef(); 131 ~ClientRef(); 132 int32_t getToken() const; 133 sp<UserClient> getClient() const; 134 status_t setToken(const sp<UserClient>& uc, 135 const sp<SharedBufferServer>& sharedClient, int32_t token); 136 sp<UserClient> getUserClientUnsafe() const; 137 class Access { 138 Access(const Access& rhs); 139 Access& operator = (const Access& rhs); 140 sp<UserClient> mUserClientStrongRef; 141 sp<SharedBufferServer> mControlBlock; 142 public: 143 Access(const ClientRef& ref); 144 ~Access(); 145 inline SharedBufferServer* get() const { return mControlBlock.get(); } 146 }; 147 friend class Access; 148 }; 149 150 // ----------------------------------------------------------------------- 151 152 class BufferManager { 153 static const size_t NUM_BUFFERS = 2; 154 struct BufferData { 155 sp<GraphicBuffer> buffer; 156 Image texture; 157 }; 158 // this lock protect mBufferData[].buffer but since there 159 // is very little contention, we have only one like for 160 // the whole array, we also use it to protect mNumBuffers. 161 mutable Mutex mLock; 162 BufferData mBufferData[SharedBufferStack::NUM_BUFFER_MAX]; 163 size_t mNumBuffers; 164 Texture mFailoverTexture; 165 TextureManager& mTextureManager; 166 ssize_t mActiveBuffer; 167 bool mFailover; 168 static status_t destroyTexture(Image* tex, EGLDisplay dpy); 169 170 public: 171 static size_t getDefaultBufferCount() { return NUM_BUFFERS; } 172 BufferManager(TextureManager& tm); 173 ~BufferManager(); 174 175 // detach/attach buffer from/to given index 176 sp<GraphicBuffer> detachBuffer(size_t index); 177 status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer); 178 // resize the number of active buffers 179 status_t resize(size_t size); 180 181 // ---------------------------------------------- 182 // must be called from GL thread 183 184 // set/get active buffer index 185 status_t setActiveBufferIndex(size_t index); 186 size_t getActiveBufferIndex() const; 187 // return the active buffer 188 sp<GraphicBuffer> getActiveBuffer() const; 189 // return the active texture (or fail-over) 190 Texture getActiveTexture() const; 191 // frees resources associated with all buffers 192 status_t destroy(EGLDisplay dpy); 193 // load bitmap data into the active buffer 194 status_t loadTexture(const Region& dirty, const GGLSurface& t); 195 // make active buffer an EGLImage if needed 196 status_t initEglImage(EGLDisplay dpy, 197 const sp<GraphicBuffer>& buffer); 198 199 // ---------------------------------------------- 200 // only for debugging 201 sp<GraphicBuffer> getBuffer(size_t index) const; 202 }; 203 204 // ----------------------------------------------------------------------- 205 206 // thread-safe 207 ClientRef mUserClientRef; 208 209 // constants 210 sp<Surface> mSurface; 211 PixelFormat mFormat; 212 const GLExtensions& mGLExtensions; 213 bool mNeedsBlending; 214 bool mNeedsDithering; 215 216 // page-flip thread (currently main thread) 217 bool mSecure; 218 Region mPostedDirtyRegion; 219 220 // page-flip thread and transaction thread (currently main thread) 221 sp<FreezeLock> mFreezeLock; 222 223 // see threading usage in declaration 224 TextureManager mTextureManager; 225 BufferManager mBufferManager; 226 227 // binder thread, transaction thread 228 mutable Mutex mLock; 229 uint32_t mWidth; 230 uint32_t mHeight; 231 uint32_t mReqWidth; 232 uint32_t mReqHeight; 233 uint32_t mReqFormat; 234 bool mFixedSize; 235}; 236 237// --------------------------------------------------------------------------- 238 239}; // namespace android 240 241#endif // ANDROID_LAYER_H 242