HWComposer.h revision 8b736f138cfd9b239a2c7073347a13c489534ae1
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 <hardware/hwcomposer_defs.h> 24 25#include <utils/Condition.h> 26#include <utils/Mutex.h> 27#include <utils/StrongPointer.h> 28#include <utils/Thread.h> 29#include <utils/Timers.h> 30#include <utils/Vector.h> 31 32extern "C" int clock_nanosleep(clockid_t clock_id, int flags, 33 const struct timespec *request, 34 struct timespec *remain); 35 36struct hwc_composer_device_1; 37struct hwc_display_contents_1; 38struct hwc_procs; 39struct framebuffer_device_t; 40 41namespace android { 42// --------------------------------------------------------------------------- 43 44class GraphicBuffer; 45class LayerBase; 46class Region; 47class String8; 48class SurfaceFlinger; 49 50class HWComposer 51{ 52public: 53 class EventHandler { 54 friend class HWComposer; 55 virtual void onVSyncReceived(int dpy, nsecs_t timestamp) = 0; 56 protected: 57 virtual ~EventHandler() {} 58 }; 59 60 enum { 61 MAIN = 0, 62 HDMI = 1, 63 MAX_DISPLAYS 64 }; 65 66 HWComposer( 67 const sp<SurfaceFlinger>& flinger, 68 EventHandler& handler, 69 framebuffer_device_t const* fbDev); 70 71 ~HWComposer(); 72 73 status_t initCheck() const; 74 75 // Asks the HAL what it can do 76 status_t prepare() const; 77 78 // disable hwc until next createWorkList 79 status_t disable(); 80 81 // commits the list 82 status_t commit(void* fbDisplay, void* fbSurface) const; 83 84 // release hardware resources and blank screen 85 status_t release() const; 86 87 // acquire hardware resources and unblank screen 88 status_t acquire() const; 89 90 // create a work list for numLayers layer. sets HWC_GEOMETRY_CHANGED. 91 status_t createWorkList(int32_t id, size_t numLayers); 92 93 // get number of layers of the given type as updated in prepare(). 94 // type is HWC_OVERLAY or HWC_FRAMEBUFFER 95 size_t getLayerCount(int32_t id, int type) const; 96 97 // needed forward declarations 98 class LayerListIterator; 99 100 /* 101 * Interface to hardware composer's layers functionality. 102 * This abstracts the HAL interface to layers which can evolve in 103 * incompatible ways from one release to another. 104 * The idea is that we could extend this interface as we add 105 * features to h/w composer. 106 */ 107 class HWCLayerInterface { 108 protected: 109 virtual ~HWCLayerInterface() { } 110 public: 111 virtual int32_t getCompositionType() const = 0; 112 virtual uint32_t getHints() const = 0; 113 virtual int getAndResetReleaseFenceFd() = 0; 114 virtual void setDefaultState() = 0; 115 virtual void setSkip(bool skip) = 0; 116 virtual void setBlending(uint32_t blending) = 0; 117 virtual void setTransform(uint32_t transform) = 0; 118 virtual void setFrame(const Rect& frame) = 0; 119 virtual void setCrop(const Rect& crop) = 0; 120 virtual void setVisibleRegionScreen(const Region& reg) = 0; 121 virtual void setBuffer(const sp<GraphicBuffer>& buffer) = 0; 122 virtual void setAcquireFenceFd(int fenceFd) = 0; 123 }; 124 125 /* 126 * Interface used to implement an iterator to a list 127 * of HWCLayer. 128 */ 129 class HWCLayer : public HWCLayerInterface { 130 friend class LayerListIterator; 131 // select the layer at the given index 132 virtual status_t setLayer(size_t index) = 0; 133 virtual HWCLayer* dup() = 0; 134 static HWCLayer* copy(HWCLayer *rhs) { 135 return rhs ? rhs->dup() : NULL; 136 } 137 protected: 138 virtual ~HWCLayer() { } 139 }; 140 141 /* 142 * Iterator through a HWCLayer list. 143 * This behaves more or less like a forward iterator. 144 */ 145 class LayerListIterator { 146 friend struct HWComposer; 147 HWCLayer* const mLayerList; 148 size_t mIndex; 149 150 LayerListIterator() : mLayerList(NULL), mIndex(0) { } 151 152 LayerListIterator(HWCLayer* layer, size_t index) 153 : mLayerList(layer), mIndex(index) { } 154 155 // we don't allow assignment, because we don't need it for now 156 LayerListIterator& operator = (const LayerListIterator& rhs); 157 158 public: 159 // copy operators 160 LayerListIterator(const LayerListIterator& rhs) 161 : mLayerList(HWCLayer::copy(rhs.mLayerList)), mIndex(rhs.mIndex) { 162 } 163 164 ~LayerListIterator() { delete mLayerList; } 165 166 // pre-increment 167 LayerListIterator& operator++() { 168 mLayerList->setLayer(++mIndex); 169 return *this; 170 } 171 172 // dereference 173 HWCLayerInterface& operator * () { return *mLayerList; } 174 HWCLayerInterface* operator -> () { return mLayerList; } 175 176 // comparison 177 bool operator == (const LayerListIterator& rhs) const { 178 return mIndex == rhs.mIndex; 179 } 180 bool operator != (const LayerListIterator& rhs) const { 181 return !operator==(rhs); 182 } 183 }; 184 185 // Returns an iterator to the beginning of the layer list 186 LayerListIterator begin(int32_t id); 187 188 // Returns an iterator to the end of the layer list 189 LayerListIterator end(int32_t id); 190 191 192 // Events handling --------------------------------------------------------- 193 194 enum { 195 EVENT_VSYNC = HWC_EVENT_VSYNC 196 }; 197 198 void eventControl(int event, int enabled); 199 200 nsecs_t getRefreshPeriod() const; 201 nsecs_t getRefreshTimestamp() const; 202 float getDpiX() const; 203 float getDpiY() const; 204 205 // this class is only used to fake the VSync event on systems that don't 206 // have it. 207 class VSyncThread : public Thread { 208 HWComposer& mHwc; 209 mutable Mutex mLock; 210 Condition mCondition; 211 bool mEnabled; 212 mutable nsecs_t mNextFakeVSync; 213 nsecs_t mRefreshPeriod; 214 virtual void onFirstRef(); 215 virtual bool threadLoop(); 216 public: 217 VSyncThread(HWComposer& hwc); 218 void setEnabled(bool enabled); 219 }; 220 221 friend class VSyncThread; 222 223 // for debugging ---------------------------------------------------------- 224 void dump(String8& out, char* scratch, size_t SIZE, 225 const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const; 226 227private: 228 229 LayerListIterator getLayerIterator(int32_t id, size_t index); 230 size_t getNumLayers(int32_t id) const; 231 232 struct cb_context; 233 234 static void hook_invalidate(struct hwc_procs* procs); 235 static void hook_vsync(struct hwc_procs* procs, int dpy, int64_t timestamp); 236 237 inline void invalidate(); 238 inline void vsync(int dpy, int64_t timestamp); 239 240 241 sp<SurfaceFlinger> mFlinger; 242 hw_module_t const* mModule; 243 struct hwc_composer_device_1* mHwc; 244 // invariant: mLists[0] != NULL iff mHwc != NULL 245 // TODO: decide whether mLists[i>0] should be non-NULL when display i is 246 // not attached/enabled. 247 struct hwc_display_contents_1* mLists[MAX_DISPLAYS]; 248 249 size_t mCapacity; 250 mutable size_t mNumOVLayers; 251 mutable size_t mNumFBLayers; 252 cb_context* mCBContext; 253 EventHandler& mEventHandler; 254 nsecs_t mRefreshPeriod; 255 float mDpiX; 256 float mDpiY; 257 size_t mVSyncCount; 258 sp<VSyncThread> mVSyncThread; 259 bool mDebugForceFakeVSync; 260 261 // protected by mLock 262 mutable Mutex mLock; 263 mutable nsecs_t mLastHwVSync; 264}; 265 266// --------------------------------------------------------------------------- 267}; // namespace android 268 269#endif // ANDROID_SF_HWCOMPOSER_H 270