| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_SF_HWCOMPOSER_H |
| #define ANDROID_SF_HWCOMPOSER_H |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <EGL/egl.h> |
| |
| #include <hardware/hwcomposer.h> |
| |
| #include <utils/StrongPointer.h> |
| #include <utils/Vector.h> |
| |
| extern "C" int clock_nanosleep(clockid_t clock_id, int flags, |
| const struct timespec *request, |
| struct timespec *remain); |
| |
| namespace android { |
| // --------------------------------------------------------------------------- |
| |
| class String8; |
| class SurfaceFlinger; |
| class LayerBase; |
| |
| class HWComposer |
| { |
| public: |
| class EventHandler { |
| friend class HWComposer; |
| virtual void onVSyncReceived(int dpy, nsecs_t timestamp) = 0; |
| protected: |
| virtual ~EventHandler() {} |
| }; |
| |
| HWComposer(const sp<SurfaceFlinger>& flinger, |
| EventHandler& handler, nsecs_t refreshPeriod); |
| ~HWComposer(); |
| |
| status_t initCheck() const; |
| |
| // tells the HAL what the framebuffer is |
| void setFrameBuffer(EGLDisplay dpy, EGLSurface sur); |
| |
| // create a work list for numLayers layer. sets HWC_GEOMETRY_CHANGED. |
| status_t createWorkList(size_t numLayers); |
| |
| // Asks the HAL what it can do |
| status_t prepare() const; |
| |
| // disable hwc until next createWorkList |
| status_t disable(); |
| |
| // commits the list |
| status_t commit() const; |
| |
| // release hardware resources |
| status_t release() const; |
| |
| // get the layer array created by createWorkList() |
| size_t getNumLayers() const; |
| hwc_layer_t* getLayers() const; |
| |
| // get number of layers of the given type as updated in prepare(). |
| // type is HWC_OVERLAY or HWC_FRAMEBUFFER |
| size_t getLayerCount(int type) const; |
| |
| // Events handling --------------------------------------------------------- |
| |
| enum { |
| EVENT_VSYNC = HWC_EVENT_VSYNC |
| }; |
| |
| status_t eventControl(int event, int enabled); |
| |
| // this class is only used to fake the VSync event on systems that don't |
| // have it. |
| class VSyncThread : public Thread { |
| HWComposer& mHwc; |
| mutable Mutex mLock; |
| Condition mCondition; |
| bool mEnabled; |
| mutable nsecs_t mNextFakeVSync; |
| nsecs_t mRefreshPeriod; |
| |
| virtual void onFirstRef() { |
| run("VSyncThread", |
| PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE); |
| } |
| |
| virtual bool threadLoop() { |
| { // scope for lock |
| Mutex::Autolock _l(mLock); |
| while (!mEnabled) { |
| mCondition.wait(mLock); |
| } |
| } |
| |
| const nsecs_t period = mRefreshPeriod; |
| const nsecs_t now = systemTime(CLOCK_MONOTONIC); |
| nsecs_t next_vsync = mNextFakeVSync; |
| nsecs_t sleep = next_vsync - now; |
| if (sleep < 0) { |
| // we missed, find where the next vsync should be |
| sleep = (period - ((now - next_vsync) % period)); |
| next_vsync = now + sleep; |
| } |
| mNextFakeVSync = next_vsync + period; |
| |
| struct timespec spec; |
| spec.tv_sec = next_vsync / 1000000000; |
| spec.tv_nsec = next_vsync % 1000000000; |
| |
| // NOTE: EINTR can happen with clock_nanosleep(), in case of |
| // any error (including EINTR) we go through the condition's |
| // test -- this is always correct and easy. |
| if (::clock_nanosleep(CLOCK_MONOTONIC, |
| TIMER_ABSTIME, &spec, NULL) == 0) { |
| mHwc.mEventHandler.onVSyncReceived(0, next_vsync); |
| } |
| return true; |
| } |
| |
| public: |
| VSyncThread(HWComposer& hwc) : |
| mHwc(hwc), mEnabled(false), |
| mNextFakeVSync(0), |
| mRefreshPeriod(hwc.mRefreshPeriod) { |
| } |
| void setEnabled(bool enabled) { |
| Mutex::Autolock _l(mLock); |
| mEnabled = enabled; |
| mCondition.signal(); |
| } |
| }; |
| |
| friend class VSyncThread; |
| |
| // for debugging ---------------------------------------------------------- |
| void dump(String8& out, char* scratch, size_t SIZE, |
| const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const; |
| |
| private: |
| |
| struct callbacks : public hwc_procs_t { |
| // these are here to facilitate the transition when adding |
| // new callbacks (an implementation can check for NULL before |
| // calling a new callback). |
| void (*zero[4])(void); |
| }; |
| |
| struct cb_context { |
| callbacks procs; |
| HWComposer* hwc; |
| }; |
| |
| static void hook_invalidate(struct hwc_procs* procs); |
| static void hook_vsync(struct hwc_procs* procs, int dpy, int64_t timestamp); |
| |
| inline void invalidate(); |
| inline void vsync(int dpy, int64_t timestamp); |
| |
| sp<SurfaceFlinger> mFlinger; |
| hw_module_t const* mModule; |
| hwc_composer_device_t* mHwc; |
| hwc_layer_list_t* mList; |
| size_t mCapacity; |
| mutable size_t mNumOVLayers; |
| mutable size_t mNumFBLayers; |
| hwc_display_t mDpy; |
| hwc_surface_t mSur; |
| cb_context mCBContext; |
| EventHandler& mEventHandler; |
| nsecs_t mRefreshPeriod; |
| sp<VSyncThread> mVSyncThread; |
| }; |
| |
| |
| // --------------------------------------------------------------------------- |
| }; // namespace android |
| |
| #endif // ANDROID_SF_HWCOMPOSER_H |