Layer.h revision ca4d3602c07837d0b2ac6878685a8e327b5f30f0
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 bool needsBlending(const sp<GraphicBuffer>& buffer) const; 79 virtual bool needsBlending() const; 80 virtual bool needsDithering() const { return mNeedsDithering; } 81 virtual bool needsFiltering() const; 82 virtual bool isSecure() const { return mSecure; } 83 virtual bool isProtected() const; 84 virtual sp<Surface> createSurface() const; 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 destroy() const; 96 virtual void dump(String8& result, char* scratch, size_t size) const; 97 98private: 99 void reloadTexture(const Region& dirty); 100 uint32_t getEffectiveUsage(uint32_t usage) const; 101 sp<GraphicBuffer> requestBuffer(int bufferIdx, 102 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 103 status_t setBufferCount(int bufferCount); 104 105 // ----------------------------------------------------------------------- 106 107 class SurfaceLayer : public LayerBaseClient::Surface { 108 public: 109 SurfaceLayer(const sp<SurfaceFlinger>& flinger, const sp<Layer>& owner); 110 ~SurfaceLayer(); 111 private: 112 virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, 113 uint32_t w, uint32_t h, uint32_t format, uint32_t usage); 114 virtual status_t setBufferCount(int bufferCount); 115 sp<Layer> getOwner() const { 116 return static_cast<Layer*>(Surface::getOwner().get()); 117 } 118 }; 119 friend class SurfaceLayer; 120 121 // ----------------------------------------------------------------------- 122 123 class ClientRef { 124 ClientRef(const ClientRef& rhs); 125 ClientRef& operator = (const ClientRef& rhs); 126 mutable Mutex mLock; 127 // binder thread, page-flip thread 128 sp<SharedBufferServer> mControlBlock; 129 wp<UserClient> mUserClient; 130 int32_t mToken; 131 public: 132 ClientRef(); 133 ~ClientRef(); 134 int32_t getToken() const; 135 sp<UserClient> getClient() const; 136 status_t setToken(const sp<UserClient>& uc, 137 const sp<SharedBufferServer>& sharedClient, int32_t token); 138 sp<UserClient> getUserClientUnsafe() const; 139 class Access { 140 Access(const Access& rhs); 141 Access& operator = (const Access& rhs); 142 sp<UserClient> mUserClientStrongRef; 143 sp<SharedBufferServer> mControlBlock; 144 public: 145 Access(const ClientRef& ref); 146 ~Access(); 147 inline SharedBufferServer* get() const { return mControlBlock.get(); } 148 }; 149 friend class Access; 150 }; 151 152 // ----------------------------------------------------------------------- 153 154 class BufferManager { 155 static const size_t NUM_BUFFERS = 2; 156 struct BufferData { 157 sp<GraphicBuffer> buffer; 158 Image texture; 159 }; 160 // this lock protect mBufferData[].buffer but since there 161 // is very little contention, we have only one like for 162 // the whole array, we also use it to protect mNumBuffers. 163 mutable Mutex mLock; 164 BufferData mBufferData[SharedBufferStack::NUM_BUFFER_MAX]; 165 size_t mNumBuffers; 166 Texture mFailoverTexture; 167 TextureManager& mTextureManager; 168 ssize_t mActiveBufferIndex; 169 sp<GraphicBuffer> mActiveBuffer; 170 bool mFailover; 171 static status_t destroyTexture(Image* tex, EGLDisplay dpy); 172 173 public: 174 static size_t getDefaultBufferCount() { return NUM_BUFFERS; } 175 BufferManager(TextureManager& tm); 176 ~BufferManager(); 177 178 // detach/attach buffer from/to given index 179 sp<GraphicBuffer> detachBuffer(size_t index); 180 status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer); 181 // resize the number of active buffers 182 status_t resize(size_t size, const sp<SurfaceFlinger>& flinger, 183 EGLDisplay dpy); 184 185 // ---------------------------------------------- 186 // must be called from GL thread 187 188 // set/get active buffer index 189 status_t setActiveBufferIndex(size_t index); 190 size_t getActiveBufferIndex() const; 191 // return the active buffer 192 sp<GraphicBuffer> getActiveBuffer() const; 193 // return wether we have an active buffer 194 bool hasActiveBuffer() const; 195 // return the active texture (or fail-over) 196 Texture getActiveTexture() const; 197 // frees resources associated with all buffers 198 status_t destroy(EGLDisplay dpy); 199 // load bitmap data into the active buffer 200 status_t loadTexture(const Region& dirty, const GGLSurface& t); 201 // make active buffer an EGLImage if needed 202 status_t initEglImage(EGLDisplay dpy, 203 const sp<GraphicBuffer>& buffer); 204 205 // ---------------------------------------------- 206 // only for debugging 207 sp<GraphicBuffer> getBuffer(size_t index) const; 208 }; 209 210 // ----------------------------------------------------------------------- 211 212 // thread-safe 213 ClientRef mUserClientRef; 214 215 // constants 216 PixelFormat mFormat; 217 const GLExtensions& mGLExtensions; 218 bool mNeedsBlending; 219 bool mNeedsDithering; 220 221 // page-flip thread (currently main thread) 222 bool mSecure; // no screenshots 223 bool mProtectedByApp; // application requires protected path to external sink 224 Region mPostedDirtyRegion; 225 226 // page-flip thread and transaction thread (currently main thread) 227 sp<FreezeLock> mFreezeLock; 228 229 // see threading usage in declaration 230 TextureManager mTextureManager; 231 BufferManager mBufferManager; 232 233 // binder thread, transaction thread 234 mutable Mutex mLock; 235 uint32_t mWidth; 236 uint32_t mHeight; 237 uint32_t mReqWidth; 238 uint32_t mReqHeight; 239 uint32_t mReqFormat; 240 bool mNeedsScaling; 241 bool mFixedSize; 242}; 243 244// --------------------------------------------------------------------------- 245 246}; // namespace android 247 248#endif // ANDROID_LAYER_H 249