HWComposer.h revision 5880cc573823148237eac9ab7bc586b8e4eb7160
1/* 2 * Copyright (C) 2010 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_SF_HWCOMPOSER_H 18#define ANDROID_SF_HWCOMPOSER_H 19 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <EGL/egl.h> 24 25#include <hardware/hwcomposer_defs.h> 26 27#include <utils/StrongPointer.h> 28#include <utils/Vector.h> 29 30extern "C" int clock_nanosleep(clockid_t clock_id, int flags, 31 const struct timespec *request, 32 struct timespec *remain); 33 34struct hwc_composer_device_1; 35struct hwc_layer_list_1; 36struct hwc_procs; 37 38namespace android { 39// --------------------------------------------------------------------------- 40 41class String8; 42class SurfaceFlinger; 43class LayerBase; 44class GraphicBuffer; 45 46class HWComposer 47{ 48public: 49 class EventHandler { 50 friend class HWComposer; 51 virtual void onVSyncReceived(int dpy, nsecs_t timestamp) = 0; 52 protected: 53 virtual ~EventHandler() {} 54 }; 55 56 HWComposer(const sp<SurfaceFlinger>& flinger, 57 EventHandler& handler, nsecs_t refreshPeriod); 58 ~HWComposer(); 59 60 status_t initCheck() const; 61 62 // tells the HAL what the framebuffer is 63 void setFrameBuffer(EGLDisplay dpy, EGLSurface sur); 64 65 // Asks the HAL what it can do 66 status_t prepare() const; 67 68 // disable hwc until next createWorkList 69 status_t disable(); 70 71 // commits the list 72 status_t commit() const; 73 74 // release hardware resources 75 status_t release() const; 76 77 // create a work list for numLayers layer. sets HWC_GEOMETRY_CHANGED. 78 status_t createWorkList(size_t numLayers); 79 80 // get the layer array created by createWorkList() 81 size_t getNumLayers() const; 82 83 // get number of layers of the given type as updated in prepare(). 84 // type is HWC_OVERLAY or HWC_FRAMEBUFFER 85 size_t getLayerCount(int type) const; 86 87 // needed forward declarations 88 class LayerListIterator; 89 90 /* 91 * Interface to hardware composer's layers functionality. 92 * This abstracts the HAL interface to layers which can evolve in 93 * incompatible ways from one release to another. 94 * The idea is that we could extend this interface as we add 95 * features to h/w composer. 96 */ 97 class HWCLayerInterface { 98 protected: 99 virtual ~HWCLayerInterface() { } 100 public: 101 virtual int32_t getCompositionType() const = 0; 102 virtual uint32_t getHints() const = 0; 103 virtual void setDefaultState() = 0; 104 virtual void setSkip(bool skip) = 0; 105 virtual void setBlending(uint32_t blending) = 0; 106 virtual void setTransform(uint32_t transform) = 0; 107 virtual void setFrame(const Rect& frame) = 0; 108 virtual void setCrop(const Rect& crop) = 0; 109 virtual void setVisibleRegionScreen(const Region& reg) = 0; 110 virtual void setBuffer(const sp<GraphicBuffer>& buffer) = 0; 111 }; 112 113 /* 114 * Interface used to implement an iterator to a list 115 * of HWCLayer. 116 */ 117 class HWCLayer : public HWCLayerInterface { 118 friend class LayerListIterator; 119 // select the layer at the given index 120 virtual status_t setLayer(size_t index) = 0; 121 virtual HWCLayer* dup() = 0; 122 static HWCLayer* copy(HWCLayer *rhs) { 123 return rhs ? rhs->dup() : NULL; 124 } 125 protected: 126 virtual ~HWCLayer() { } 127 }; 128 129 /* 130 * Iterator through a HWCLayer list. 131 * This behaves more or less like a forward iterator. 132 */ 133 class LayerListIterator { 134 friend struct HWComposer; 135 HWCLayer* const mLayerList; 136 size_t mIndex; 137 138 LayerListIterator() : mLayerList(NULL), mIndex(0) { } 139 140 LayerListIterator(HWCLayer* layer, size_t index) 141 : mLayerList(layer), mIndex(index) { } 142 143 // we don't allow assignment, because we don't need it for now 144 LayerListIterator& operator = (const LayerListIterator& rhs); 145 146 public: 147 // copy operators 148 LayerListIterator(const LayerListIterator& rhs) 149 : mLayerList(HWCLayer::copy(rhs.mLayerList)), mIndex(rhs.mIndex) { 150 } 151 152 ~LayerListIterator() { delete mLayerList; } 153 154 // pre-increment 155 LayerListIterator& operator++() { 156 mLayerList->setLayer(++mIndex); 157 return *this; 158 } 159 160 // dereference 161 HWCLayerInterface& operator * () { return *mLayerList; } 162 HWCLayerInterface* operator -> () { return mLayerList; } 163 164 // comparison 165 bool operator == (const LayerListIterator& rhs) const { 166 return mIndex == rhs.mIndex; 167 } 168 bool operator != (const LayerListIterator& rhs) const { 169 return !operator==(rhs); 170 } 171 }; 172 173 // Returns an iterator to the beginning of the layer list 174 LayerListIterator begin(); 175 176 // Returns an iterator to the end of the layer list 177 LayerListIterator end(); 178 179 180 // Events handling --------------------------------------------------------- 181 182 enum { 183 EVENT_VSYNC = HWC_EVENT_VSYNC 184 }; 185 186 void eventControl(int event, int enabled); 187 188 // this class is only used to fake the VSync event on systems that don't 189 // have it. 190 class VSyncThread : public Thread { 191 HWComposer& mHwc; 192 mutable Mutex mLock; 193 Condition mCondition; 194 bool mEnabled; 195 mutable nsecs_t mNextFakeVSync; 196 nsecs_t mRefreshPeriod; 197 virtual void onFirstRef(); 198 virtual bool threadLoop(); 199 public: 200 VSyncThread(HWComposer& hwc); 201 void setEnabled(bool enabled); 202 }; 203 204 friend class VSyncThread; 205 206 // for debugging ---------------------------------------------------------- 207 void dump(String8& out, char* scratch, size_t SIZE, 208 const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const; 209 210private: 211 LayerListIterator getLayerIterator(size_t index); 212 213 struct cb_context; 214 215 static void hook_invalidate(struct hwc_procs* procs); 216 static void hook_vsync(struct hwc_procs* procs, int dpy, int64_t timestamp); 217 218 inline void invalidate(); 219 inline void vsync(int dpy, int64_t timestamp); 220 221 sp<SurfaceFlinger> mFlinger; 222 hw_module_t const* mModule; 223 struct hwc_composer_device_1* mHwc; 224 struct hwc_layer_list_1* mList; 225 size_t mCapacity; 226 mutable size_t mNumOVLayers; 227 mutable size_t mNumFBLayers; 228 EGLDisplay mDpy; 229 EGLSurface mSur; 230 cb_context* mCBContext; 231 EventHandler& mEventHandler; 232 nsecs_t mRefreshPeriod; 233 size_t mVSyncCount; 234 sp<VSyncThread> mVSyncThread; 235 bool mDebugForceFakeVSync; 236}; 237 238// --------------------------------------------------------------------------- 239}; // namespace android 240 241#endif // ANDROID_SF_HWCOMPOSER_H 242