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/*
* 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
};
void 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();
virtual bool threadLoop();
public:
VSyncThread(HWComposer& hwc);
void setEnabled(bool enabled);
};
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;
size_t mVSyncCount;
sp<VSyncThread> mVSyncThread;
bool mDebugForceFakeVSync;
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_SF_HWCOMPOSER_H
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