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* Copyright (C) 2007 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <stdint.h>
#include <sys/types.h>
#include <gui/SurfaceTexture.h>
#include <utils/Timers.h>
#include <ui/GraphicBuffer.h>
#include <ui/PixelFormat.h>
#include <gui/ISurfaceComposerClient.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <GLES/glext.h>
#include "LayerBase.h"
#include "SurfaceTextureLayer.h"
#include "Transform.h"
namespace android {
// ---------------------------------------------------------------------------
class Client;
class GLExtensions;
// ---------------------------------------------------------------------------
class Layer : public LayerBaseClient
Layer(SurfaceFlinger* flinger, DisplayID display,
const sp<Client>& client);
virtual ~Layer();
virtual const char* getTypeId() const { return "Layer"; }
// the this layer's size and format
status_t setBuffers(uint32_t w, uint32_t h,
PixelFormat format, uint32_t flags=0);
bool isFixedSize() const;
// LayerBase interface
virtual void setGeometry(hwc_layer_t* hwcl);
virtual void setPerFrameData(hwc_layer_t* hwcl);
virtual void onDraw(const Region& clip) const;
virtual uint32_t doTransaction(uint32_t transactionFlags);
virtual void lockPageFlip(bool& recomputeVisibleRegions);
virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
virtual bool isOpaque() const;
virtual bool needsDithering() const { return mNeedsDithering; }
virtual bool isSecure() const { return mSecure; }
virtual bool isProtected() const;
virtual void onRemoved();
virtual sp<Layer> getLayer() const { return const_cast<Layer*>(this); }
virtual void setName(const String8& name);
virtual void validateVisibility(const Transform& globalTransform);
// LayerBaseClient interface
virtual wp<IBinder> getSurfaceTextureBinder() const;
virtual void onLayerDisplayed();
virtual bool onPreComposition();
// only for debugging
inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; }
virtual void onFirstRef();
virtual void dump(String8& result, char* scratch, size_t size) const;
virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const;
virtual void clearStats();
friend class SurfaceTextureLayer;
void onFrameQueued();
virtual sp<ISurface> createSurface();
uint32_t getEffectiveUsage(uint32_t usage) const;
uint32_t getTransformHint() const;
bool isCropped() const;
Rect computeBufferCrop() const;
static bool getOpacityForFormat(uint32_t format);
// -----------------------------------------------------------------------
// constants
sp<SurfaceTexture> mSurfaceTexture;
GLuint mTextureName;
// thread-safe
volatile int32_t mQueuedFrames;
// main thread
sp<GraphicBuffer> mActiveBuffer;
Rect mCurrentCrop;
uint32_t mCurrentTransform;
uint32_t mCurrentScalingMode;
bool mCurrentOpacity;
bool mRefreshPending;
bool mFrameLatencyNeeded;
int mFrameLatencyOffset;
struct Statistics {
Statistics() : timestamp(0), set(0), vsync(0) { }
nsecs_t timestamp; // buffer timestamp
nsecs_t set; // buffer displayed timestamp
nsecs_t vsync; // vsync immediately before set
// protected by mLock
Statistics mFrameStats[128];
// constants
PixelFormat mFormat;
const GLExtensions& mGLExtensions;
bool mOpaqueLayer;
bool mNeedsDithering;
// page-flip thread (currently main thread)
bool mSecure; // no screenshots
bool mProtectedByApp; // application requires protected path to external sink
Region mPostedDirtyRegion;
// ---------------------------------------------------------------------------
}; // namespace android