include/gui/Surface.h - platform/frameworks/native - Gitiles

 /*
  * 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_GUI_SURFACE_H
 #define ANDROID_GUI_SURFACE_H

 #include <gui/IGraphicBufferProducer.h>
 #include <gui/BufferQueue.h>

 #include <ui/ANativeObjectBase.h>
 #include <ui/Region.h>

 #include <binder/Parcelable.h>

 #include <utils/RefBase.h>
 #include <utils/threads.h>
 #include <utils/KeyedVector.h>

 struct ANativeWindow_Buffer;

 namespace android {

 /*
  * An implementation of ANativeWindow that feeds graphics buffers into a
  * BufferQueue.
  *
  * This is typically used by programs that want to render frames through
  * some means (maybe OpenGL, a software renderer, or a hardware decoder)
  * and have the frames they create forwarded to SurfaceFlinger for
  * compositing.  For example, a video decoder could render a frame and call
  * eglSwapBuffers(), which invokes ANativeWindow callbacks defined by
  * Surface.  Surface then forwards the buffers through Binder IPC
  * to the BufferQueue's producer interface, providing the new frame to a
  * consumer such as GLConsumer.
  */
 class Surface
     : public ANativeObjectBase<ANativeWindow, Surface, RefBase>
 {
 public:

     /*
      * creates a Surface from the given IGraphicBufferProducer (which concrete
      * implementation is a BufferQueue).
      *
      * Surface is mainly state-less while it's disconnected, it can be
      * viewed as a glorified IGraphicBufferProducer holder. It's therefore
      * safe to create other Surfaces from the same IGraphicBufferProducer.
      *
      * However, once a Surface is connected, it'll prevent other Surfaces
      * referring to the same IGraphicBufferProducer to become connected and
      * therefore prevent them to be used as actual producers of buffers.
      *
      * the controlledByApp flag indicates that this Surface (producer) is
      * controlled by the application. This flag is used at connect time.
      */
     explicit Surface(const sp<IGraphicBufferProducer>& bufferProducer, bool controlledByApp = false);

     /* getIGraphicBufferProducer() returns the IGraphicBufferProducer this
      * Surface was created with. Usually it's an error to use the
      * IGraphicBufferProducer while the Surface is connected.
      */
     sp<IGraphicBufferProducer> getIGraphicBufferProducer() const;

     /* convenience function to check that the given surface is non NULL as
      * well as its IGraphicBufferProducer */
     static bool isValid(const sp<Surface>& surface) {
         return surface != NULL && surface->getIGraphicBufferProducer() != NULL;
     }

     /* Attaches a sideband buffer stream to the Surface's IGraphicBufferProducer.
      *
      * A sideband stream is a device-specific mechanism for passing buffers
      * from the producer to the consumer without using dequeueBuffer/
      * queueBuffer. If a sideband stream is present, the consumer can choose
      * whether to acquire buffers from the sideband stream or from the queued
      * buffers.
      *
      * Passing NULL or a different stream handle will detach the previous
      * handle if any.
      */
     void setSidebandStream(const sp<NativeHandle>& stream);

     /* Allocates buffers based on the current dimensions/format.
      *
      * This function will allocate up to the maximum number of buffers
      * permitted by the current BufferQueue configuration. It will use the
      * default format and dimensions. This is most useful to avoid an allocation
      * delay during dequeueBuffer. If there are already the maximum number of
      * buffers allocated, this function has no effect.
      */
     void allocateBuffers();

     /* Sets the generation number on the IGraphicBufferProducer and updates the
      * generation number on any buffers attached to the Surface after this call.
      * See IGBP::setGenerationNumber for more information. */
     status_t setGenerationNumber(uint32_t generationNumber);

     // See IGraphicBufferProducer::getConsumerName
     String8 getConsumerName() const;

     // See IGraphicBufferProducer::getNextFrameNumber
     uint64_t getNextFrameNumber() const;

     /* Set the scaling mode to be used with a Surface.
      * See NATIVE_WINDOW_SET_SCALING_MODE and its parameters
      * in <system/window.h>. */
     int setScalingMode(int mode);

     // See IGraphicBufferProducer::setDequeueTimeout
     status_t setDequeueTimeout(nsecs_t timeout);

     /*
      * Wait for frame number to increase past lastFrame for at most
      * timeoutNs. Useful for one thread to wait for another unknown
      * thread to queue a buffer.
      */
     bool waitForNextFrame(uint64_t lastFrame, nsecs_t timeout);

     // See IGraphicBufferProducer::getLastQueuedBuffer
     // See GLConsumer::getTransformMatrix for outTransformMatrix format
     status_t getLastQueuedBuffer(sp<GraphicBuffer>* outBuffer,
             sp<Fence>* outFence, float outTransformMatrix[16]);

     // See IGraphicBufferProducer::getFrameTimestamps
     bool getFrameTimestamps(uint64_t frameNumber, nsecs_t* outPostedTime,
             nsecs_t* outAcquireTime, nsecs_t* outRefreshStartTime,
             nsecs_t* outGlCompositionDoneTime, nsecs_t* outDisplayRetireTime,
             nsecs_t* outReleaseTime);

     status_t getUniqueId(uint64_t* outId) const;

 protected:
     virtual ~Surface();

 private:
     // can't be copied
     Surface& operator = (const Surface& rhs);
     Surface(const Surface& rhs);

     // ANativeWindow hooks
     static int hook_cancelBuffer(ANativeWindow* window,
             ANativeWindowBuffer* buffer, int fenceFd);
     static int hook_dequeueBuffer(ANativeWindow* window,
             ANativeWindowBuffer** buffer, int* fenceFd);
     static int hook_perform(ANativeWindow* window, int operation, ...);
     static int hook_query(const ANativeWindow* window, int what, int* value);
     static int hook_queueBuffer(ANativeWindow* window,
             ANativeWindowBuffer* buffer, int fenceFd);
     static int hook_setSwapInterval(ANativeWindow* window, int interval);

     static int hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
             ANativeWindowBuffer* buffer);
     static int hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
             ANativeWindowBuffer** buffer);
     static int hook_lockBuffer_DEPRECATED(ANativeWindow* window,
             ANativeWindowBuffer* buffer);
     static int hook_queueBuffer_DEPRECATED(ANativeWindow* window,
             ANativeWindowBuffer* buffer);

     int dispatchConnect(va_list args);
     int dispatchDisconnect(va_list args);
     int dispatchSetBufferCount(va_list args);
     int dispatchSetBuffersGeometry(va_list args);
     int dispatchSetBuffersDimensions(va_list args);
     int dispatchSetBuffersUserDimensions(va_list args);
     int dispatchSetBuffersFormat(va_list args);
     int dispatchSetScalingMode(va_list args);
     int dispatchSetBuffersTransform(va_list args);
     int dispatchSetBuffersStickyTransform(va_list args);
     int dispatchSetBuffersTimestamp(va_list args);
     int dispatchSetCrop(va_list args);
     int dispatchSetPostTransformCrop(va_list args);
     int dispatchSetUsage(va_list args);
     int dispatchLock(va_list args);
     int dispatchUnlockAndPost(va_list args);
     int dispatchSetSidebandStream(va_list args);
     int dispatchSetBuffersDataSpace(va_list args);
     int dispatchSetSurfaceDamage(va_list args);
     int dispatchSetSharedBufferMode(va_list args);
     int dispatchSetAutoRefresh(va_list args);
     int dispatchGetFrameTimestamps(va_list args);

 protected:
     virtual int dequeueBuffer(ANativeWindowBuffer** buffer, int* fenceFd);
     virtual int cancelBuffer(ANativeWindowBuffer* buffer, int fenceFd);
     virtual int queueBuffer(ANativeWindowBuffer* buffer, int fenceFd);
     virtual int perform(int operation, va_list args);
     virtual int setSwapInterval(int interval);

     virtual int lockBuffer_DEPRECATED(ANativeWindowBuffer* buffer);

     virtual int connect(int api);
     virtual int setBufferCount(int bufferCount);
     virtual int setBuffersDimensions(uint32_t width, uint32_t height);
     virtual int setBuffersUserDimensions(uint32_t width, uint32_t height);
     virtual int setBuffersFormat(PixelFormat format);
     virtual int setBuffersTransform(uint32_t transform);
     virtual int setBuffersStickyTransform(uint32_t transform);
     virtual int setBuffersTimestamp(int64_t timestamp);
     virtual int setBuffersDataSpace(android_dataspace dataSpace);
     virtual int setCrop(Rect const* rect);
     virtual int setUsage(uint32_t reqUsage);
     virtual void setSurfaceDamage(android_native_rect_t* rects, size_t numRects);

 public:
     virtual int disconnect(int api,
             IGraphicBufferProducer::DisconnectMode mode =
                     IGraphicBufferProducer::DisconnectMode::Api);

     virtual int setMaxDequeuedBufferCount(int maxDequeuedBuffers);
     virtual int setAsyncMode(bool async);
     virtual int setSharedBufferMode(bool sharedBufferMode);
     virtual int setAutoRefresh(bool autoRefresh);
     virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds);
     virtual int unlockAndPost();
     virtual int query(int what, int* value) const;

     virtual int connect(int api, const sp<IProducerListener>& listener);
     virtual int detachNextBuffer(sp<GraphicBuffer>* outBuffer,
             sp<Fence>* outFence);
     virtual int attachBuffer(ANativeWindowBuffer*);

 protected:
     enum { NUM_BUFFER_SLOTS = BufferQueue::NUM_BUFFER_SLOTS };
     enum { DEFAULT_FORMAT = PIXEL_FORMAT_RGBA_8888 };

 private:
     void freeAllBuffers();
     int getSlotFromBufferLocked(android_native_buffer_t* buffer) const;

     struct BufferSlot {
         sp<GraphicBuffer> buffer;
         Region dirtyRegion;
     };

     // mSurfaceTexture is the interface to the surface texture server. All
     // operations on the surface texture client ultimately translate into
     // interactions with the server using this interface.
     // TODO: rename to mBufferProducer
     sp<IGraphicBufferProducer> mGraphicBufferProducer;

     // mSlots stores the buffers that have been allocated for each buffer slot.
     // It is initialized to null pointers, and gets filled in with the result of
     // IGraphicBufferProducer::requestBuffer when the client dequeues a buffer from a
     // slot that has not yet been used. The buffer allocated to a slot will also
     // be replaced if the requested buffer usage or geometry differs from that
     // of the buffer allocated to a slot.
     BufferSlot mSlots[NUM_BUFFER_SLOTS];

     // mReqWidth is the buffer width that will be requested at the next dequeue
     // operation. It is initialized to 1.
     uint32_t mReqWidth;

     // mReqHeight is the buffer height that will be requested at the next
     // dequeue operation. It is initialized to 1.
     uint32_t mReqHeight;

     // mReqFormat is the buffer pixel format that will be requested at the next
     // deuque operation. It is initialized to PIXEL_FORMAT_RGBA_8888.
     PixelFormat mReqFormat;

     // mReqUsage is the set of buffer usage flags that will be requested
     // at the next deuque operation. It is initialized to 0.
     uint32_t mReqUsage;

     // mTimestamp is the timestamp that will be used for the next buffer queue
     // operation. It defaults to NATIVE_WINDOW_TIMESTAMP_AUTO, which means that
     // a timestamp is auto-generated when queueBuffer is called.
     int64_t mTimestamp;

     // mDataSpace is the buffer dataSpace that will be used for the next buffer
     // queue operation. It defaults to HAL_DATASPACE_UNKNOWN, which
     // means that the buffer contains some type of color data.
     android_dataspace mDataSpace;

     // mCrop is the crop rectangle that will be used for the next buffer
     // that gets queued. It is set by calling setCrop.
     Rect mCrop;

     // mScalingMode is the scaling mode that will be used for the next
     // buffers that get queued. It is set by calling setScalingMode.
     int mScalingMode;

     // mTransform is the transform identifier that will be used for the next
     // buffer that gets queued. It is set by calling setTransform.
     uint32_t mTransform;

     // mStickyTransform is a transform that is applied on top of mTransform
     // in each buffer that is queued.  This is typically used to force the
     // compositor to apply a transform, and will prevent the transform hint
     // from being set by the compositor.
     uint32_t mStickyTransform;

     // mDefaultWidth is default width of the buffers, regardless of the
     // native_window_set_buffers_dimensions call.
     uint32_t mDefaultWidth;

     // mDefaultHeight is default height of the buffers, regardless of the
     // native_window_set_buffers_dimensions call.
     uint32_t mDefaultHeight;

     // mUserWidth, if non-zero, is an application-specified override
     // of mDefaultWidth.  This is lower priority than the width set by
     // native_window_set_buffers_dimensions.
     uint32_t mUserWidth;

     // mUserHeight, if non-zero, is an application-specified override
     // of mDefaultHeight.  This is lower priority than the height set
     // by native_window_set_buffers_dimensions.
     uint32_t mUserHeight;

     // mTransformHint is the transform probably applied to buffers of this
     // window. this is only a hint, actual transform may differ.
     uint32_t mTransformHint;

     // mProducerControlledByApp whether this buffer producer is controlled
     // by the application
     bool mProducerControlledByApp;

     // mSwapIntervalZero set if we should drop buffers at queue() time to
     // achieve an asynchronous swap interval
     bool mSwapIntervalZero;

     // mConsumerRunningBehind whether the consumer is running more than
     // one buffer behind the producer.
     mutable bool mConsumerRunningBehind;

     // mMutex is the mutex used to prevent concurrent access to the member
     // variables of Surface objects. It must be locked whenever the
     // member variables are accessed.
     mutable Mutex mMutex;

     // must be used from the lock/unlock thread
     sp<GraphicBuffer>           mLockedBuffer;
     sp<GraphicBuffer>           mPostedBuffer;
     bool                        mConnectedToCpu;

     // When a CPU producer is attached, this reflects the region that the
     // producer wished to update as well as whether the Surface was able to copy
     // the previous buffer back to allow a partial update.
     //
     // When a non-CPU producer is attached, this reflects the surface damage
     // (the change since the previous frame) passed in by the producer.
     Region mDirtyRegion;

     // Stores the current generation number. See setGenerationNumber and
     // IGraphicBufferProducer::setGenerationNumber for more information.
     uint32_t mGenerationNumber;

     // Caches the values that have been passed to the producer.
     bool mSharedBufferMode;
     bool mAutoRefresh;

     // If in shared buffer mode and auto refresh is enabled, store the shared
     // buffer slot and return it for all calls to queue/dequeue without going
     // over Binder.
     int mSharedBufferSlot;

     // This is true if the shared buffer has already been queued/canceled. It's
     // used to prevent a mismatch between the number of queue/dequeue calls.
     bool mSharedBufferHasBeenQueued;

     // These are used to satisfy the NATIVE_WINDOW_LAST_*_DURATION queries
     nsecs_t mLastDequeueDuration = 0;
     nsecs_t mLastQueueDuration = 0;

     Condition mQueueBufferCondition;

     uint64_t mNextFrameNumber;
 };

 namespace view {

 /**
  * A simple holder for an IGraphicBufferProducer, to match the managed-side
  * android.view.Surface parcelable behavior.
  *
  * This implements android/view/Surface.aidl
  *
  * TODO: Convert IGraphicBufferProducer into AIDL so that it can be directly
  * used in managed Binder calls.
  */
 class Surface : public Parcelable {
   public:

     String16 name;
     sp<IGraphicBufferProducer> graphicBufferProducer;

     virtual status_t writeToParcel(Parcel* parcel) const override;
     virtual status_t readFromParcel(const Parcel* parcel) override;

     // nameAlreadyWritten set to true by Surface.java, because it splits
     // Parceling itself between managed and native code, so it only wants a part
     // of the full parceling to happen on its native side.
     status_t writeToParcel(Parcel* parcel, bool nameAlreadyWritten) const;

     // nameAlreadyRead set to true by Surface.java, because it splits
     // Parceling itself between managed and native code, so it only wants a part
     // of the full parceling to happen on its native side.
     status_t readFromParcel(const Parcel* parcel, bool nameAlreadyRead);

   private:

     static String16 readMaybeEmptyString16(const Parcel* parcel);
 };

 } // namespace view

 }; // namespace android

 #endif  // ANDROID_GUI_SURFACE_H
	/*
	* 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_GUI_SURFACE_H
	#define ANDROID_GUI_SURFACE_H

	#include <gui/IGraphicBufferProducer.h>
	#include <gui/BufferQueue.h>

	#include <ui/ANativeObjectBase.h>
	#include <ui/Region.h>

	#include <binder/Parcelable.h>

	#include <utils/RefBase.h>
	#include <utils/threads.h>
	#include <utils/KeyedVector.h>

	struct ANativeWindow_Buffer;

	namespace android {

	/*
	* An implementation of ANativeWindow that feeds graphics buffers into a
	* BufferQueue.
	*
	* This is typically used by programs that want to render frames through
	* some means (maybe OpenGL, a software renderer, or a hardware decoder)
	* and have the frames they create forwarded to SurfaceFlinger for
	* compositing. For example, a video decoder could render a frame and call
	* eglSwapBuffers(), which invokes ANativeWindow callbacks defined by
	* Surface. Surface then forwards the buffers through Binder IPC
	* to the BufferQueue's producer interface, providing the new frame to a
	* consumer such as GLConsumer.
	*/
	class Surface
	: public ANativeObjectBase<ANativeWindow, Surface, RefBase>
	{
	public:

	/*
	* creates a Surface from the given IGraphicBufferProducer (which concrete
	* implementation is a BufferQueue).
	*
	* Surface is mainly state-less while it's disconnected, it can be
	* viewed as a glorified IGraphicBufferProducer holder. It's therefore
	* safe to create other Surfaces from the same IGraphicBufferProducer.
	*
	* However, once a Surface is connected, it'll prevent other Surfaces
	* referring to the same IGraphicBufferProducer to become connected and
	* therefore prevent them to be used as actual producers of buffers.
	*
	* the controlledByApp flag indicates that this Surface (producer) is
	* controlled by the application. This flag is used at connect time.
	*/
	explicit Surface(const sp<IGraphicBufferProducer>& bufferProducer, bool controlledByApp = false);

	/* getIGraphicBufferProducer() returns the IGraphicBufferProducer this
	* Surface was created with. Usually it's an error to use the
	* IGraphicBufferProducer while the Surface is connected.
	*/
	sp<IGraphicBufferProducer> getIGraphicBufferProducer() const;

	/* convenience function to check that the given surface is non NULL as
	* well as its IGraphicBufferProducer */
	static bool isValid(const sp<Surface>& surface) {
	return surface != NULL && surface->getIGraphicBufferProducer() != NULL;
	}

	/* Attaches a sideband buffer stream to the Surface's IGraphicBufferProducer.
	*
	* A sideband stream is a device-specific mechanism for passing buffers
	* from the producer to the consumer without using dequeueBuffer/
	* queueBuffer. If a sideband stream is present, the consumer can choose
	* whether to acquire buffers from the sideband stream or from the queued
	* buffers.
	*
	* Passing NULL or a different stream handle will detach the previous
	* handle if any.
	*/
	void setSidebandStream(const sp<NativeHandle>& stream);

	/* Allocates buffers based on the current dimensions/format.
	*
	* This function will allocate up to the maximum number of buffers
	* permitted by the current BufferQueue configuration. It will use the
	* default format and dimensions. This is most useful to avoid an allocation
	* delay during dequeueBuffer. If there are already the maximum number of
	* buffers allocated, this function has no effect.
	*/
	void allocateBuffers();

	/* Sets the generation number on the IGraphicBufferProducer and updates the
	* generation number on any buffers attached to the Surface after this call.
	* See IGBP::setGenerationNumber for more information. */
	status_t setGenerationNumber(uint32_t generationNumber);

	// See IGraphicBufferProducer::getConsumerName
	String8 getConsumerName() const;

	// See IGraphicBufferProducer::getNextFrameNumber
	uint64_t getNextFrameNumber() const;

	/* Set the scaling mode to be used with a Surface.
	* See NATIVE_WINDOW_SET_SCALING_MODE and its parameters
	* in <system/window.h>. */
	int setScalingMode(int mode);

	// See IGraphicBufferProducer::setDequeueTimeout
	status_t setDequeueTimeout(nsecs_t timeout);

	/*
	* Wait for frame number to increase past lastFrame for at most
	* timeoutNs. Useful for one thread to wait for another unknown
	* thread to queue a buffer.
	*/
	bool waitForNextFrame(uint64_t lastFrame, nsecs_t timeout);

	// See IGraphicBufferProducer::getLastQueuedBuffer
	// See GLConsumer::getTransformMatrix for outTransformMatrix format
	status_t getLastQueuedBuffer(sp<GraphicBuffer>* outBuffer,
	sp<Fence>* outFence, float outTransformMatrix[16]);

	// See IGraphicBufferProducer::getFrameTimestamps
	bool getFrameTimestamps(uint64_t frameNumber, nsecs_t* outPostedTime,
	nsecs_t* outAcquireTime, nsecs_t* outRefreshStartTime,
	nsecs_t* outGlCompositionDoneTime, nsecs_t* outDisplayRetireTime,
	nsecs_t* outReleaseTime);

	status_t getUniqueId(uint64_t* outId) const;

	protected:
	virtual ~Surface();

	private:
	// can't be copied
	Surface& operator = (const Surface& rhs);
	Surface(const Surface& rhs);

	// ANativeWindow hooks
	static int hook_cancelBuffer(ANativeWindow* window,
	ANativeWindowBuffer* buffer, int fenceFd);
	static int hook_dequeueBuffer(ANativeWindow* window,
	ANativeWindowBuffer** buffer, int* fenceFd);
	static int hook_perform(ANativeWindow* window, int operation, ...);
	static int hook_query(const ANativeWindow* window, int what, int* value);
	static int hook_queueBuffer(ANativeWindow* window,
	ANativeWindowBuffer* buffer, int fenceFd);
	static int hook_setSwapInterval(ANativeWindow* window, int interval);

	static int hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
	ANativeWindowBuffer* buffer);
	static int hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
	ANativeWindowBuffer** buffer);
	static int hook_lockBuffer_DEPRECATED(ANativeWindow* window,
	ANativeWindowBuffer* buffer);
	static int hook_queueBuffer_DEPRECATED(ANativeWindow* window,
	ANativeWindowBuffer* buffer);

	int dispatchConnect(va_list args);
	int dispatchDisconnect(va_list args);
	int dispatchSetBufferCount(va_list args);
	int dispatchSetBuffersGeometry(va_list args);
	int dispatchSetBuffersDimensions(va_list args);
	int dispatchSetBuffersUserDimensions(va_list args);
	int dispatchSetBuffersFormat(va_list args);
	int dispatchSetScalingMode(va_list args);
	int dispatchSetBuffersTransform(va_list args);
	int dispatchSetBuffersStickyTransform(va_list args);
	int dispatchSetBuffersTimestamp(va_list args);
	int dispatchSetCrop(va_list args);
	int dispatchSetPostTransformCrop(va_list args);
	int dispatchSetUsage(va_list args);
	int dispatchLock(va_list args);
	int dispatchUnlockAndPost(va_list args);
	int dispatchSetSidebandStream(va_list args);
	int dispatchSetBuffersDataSpace(va_list args);
	int dispatchSetSurfaceDamage(va_list args);
	int dispatchSetSharedBufferMode(va_list args);
	int dispatchSetAutoRefresh(va_list args);
	int dispatchGetFrameTimestamps(va_list args);

	protected:
	virtual int dequeueBuffer(ANativeWindowBuffer** buffer, int* fenceFd);
	virtual int cancelBuffer(ANativeWindowBuffer* buffer, int fenceFd);
	virtual int queueBuffer(ANativeWindowBuffer* buffer, int fenceFd);
	virtual int perform(int operation, va_list args);
	virtual int setSwapInterval(int interval);

	virtual int lockBuffer_DEPRECATED(ANativeWindowBuffer* buffer);

	virtual int connect(int api);
	virtual int setBufferCount(int bufferCount);
	virtual int setBuffersDimensions(uint32_t width, uint32_t height);
	virtual int setBuffersUserDimensions(uint32_t width, uint32_t height);
	virtual int setBuffersFormat(PixelFormat format);
	virtual int setBuffersTransform(uint32_t transform);
	virtual int setBuffersStickyTransform(uint32_t transform);
	virtual int setBuffersTimestamp(int64_t timestamp);
	virtual int setBuffersDataSpace(android_dataspace dataSpace);
	virtual int setCrop(Rect const* rect);
	virtual int setUsage(uint32_t reqUsage);
	virtual void setSurfaceDamage(android_native_rect_t* rects, size_t numRects);

	public:
	virtual int disconnect(int api,
	IGraphicBufferProducer::DisconnectMode mode =
	IGraphicBufferProducer::DisconnectMode::Api);

	virtual int setMaxDequeuedBufferCount(int maxDequeuedBuffers);
	virtual int setAsyncMode(bool async);
	virtual int setSharedBufferMode(bool sharedBufferMode);
	virtual int setAutoRefresh(bool autoRefresh);
	virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds);
	virtual int unlockAndPost();
	virtual int query(int what, int* value) const;

	virtual int connect(int api, const sp<IProducerListener>& listener);
	virtual int detachNextBuffer(sp<GraphicBuffer>* outBuffer,
	sp<Fence>* outFence);
	virtual int attachBuffer(ANativeWindowBuffer*);

	protected:
	enum { NUM_BUFFER_SLOTS = BufferQueue::NUM_BUFFER_SLOTS };
	enum { DEFAULT_FORMAT = PIXEL_FORMAT_RGBA_8888 };

	private:
	void freeAllBuffers();
	int getSlotFromBufferLocked(android_native_buffer_t* buffer) const;

	struct BufferSlot {
	sp<GraphicBuffer> buffer;
	Region dirtyRegion;
	};

	// mSurfaceTexture is the interface to the surface texture server. All
	// operations on the surface texture client ultimately translate into
	// interactions with the server using this interface.
	// TODO: rename to mBufferProducer
	sp<IGraphicBufferProducer> mGraphicBufferProducer;

	// mSlots stores the buffers that have been allocated for each buffer slot.
	// It is initialized to null pointers, and gets filled in with the result of
	// IGraphicBufferProducer::requestBuffer when the client dequeues a buffer from a
	// slot that has not yet been used. The buffer allocated to a slot will also
	// be replaced if the requested buffer usage or geometry differs from that
	// of the buffer allocated to a slot.
	BufferSlot mSlots[NUM_BUFFER_SLOTS];

	// mReqWidth is the buffer width that will be requested at the next dequeue
	// operation. It is initialized to 1.
	uint32_t mReqWidth;

	// mReqHeight is the buffer height that will be requested at the next
	// dequeue operation. It is initialized to 1.
	uint32_t mReqHeight;

	// mReqFormat is the buffer pixel format that will be requested at the next
	// deuque operation. It is initialized to PIXEL_FORMAT_RGBA_8888.
	PixelFormat mReqFormat;

	// mReqUsage is the set of buffer usage flags that will be requested
	// at the next deuque operation. It is initialized to 0.
	uint32_t mReqUsage;

	// mTimestamp is the timestamp that will be used for the next buffer queue
	// operation. It defaults to NATIVE_WINDOW_TIMESTAMP_AUTO, which means that
	// a timestamp is auto-generated when queueBuffer is called.
	int64_t mTimestamp;

	// mDataSpace is the buffer dataSpace that will be used for the next buffer
	// queue operation. It defaults to HAL_DATASPACE_UNKNOWN, which
	// means that the buffer contains some type of color data.
	android_dataspace mDataSpace;

	// mCrop is the crop rectangle that will be used for the next buffer
	// that gets queued. It is set by calling setCrop.
	Rect mCrop;

	// mScalingMode is the scaling mode that will be used for the next
	// buffers that get queued. It is set by calling setScalingMode.
	int mScalingMode;

	// mTransform is the transform identifier that will be used for the next
	// buffer that gets queued. It is set by calling setTransform.
	uint32_t mTransform;

	// mStickyTransform is a transform that is applied on top of mTransform
	// in each buffer that is queued. This is typically used to force the
	// compositor to apply a transform, and will prevent the transform hint
	// from being set by the compositor.
	uint32_t mStickyTransform;

	// mDefaultWidth is default width of the buffers, regardless of the
	// native_window_set_buffers_dimensions call.
	uint32_t mDefaultWidth;

	// mDefaultHeight is default height of the buffers, regardless of the
	// native_window_set_buffers_dimensions call.
	uint32_t mDefaultHeight;

	// mUserWidth, if non-zero, is an application-specified override
	// of mDefaultWidth. This is lower priority than the width set by
	// native_window_set_buffers_dimensions.
	uint32_t mUserWidth;

	// mUserHeight, if non-zero, is an application-specified override
	// of mDefaultHeight. This is lower priority than the height set
	// by native_window_set_buffers_dimensions.
	uint32_t mUserHeight;

	// mTransformHint is the transform probably applied to buffers of this
	// window. this is only a hint, actual transform may differ.
	uint32_t mTransformHint;

	// mProducerControlledByApp whether this buffer producer is controlled
	// by the application
	bool mProducerControlledByApp;

	// mSwapIntervalZero set if we should drop buffers at queue() time to
	// achieve an asynchronous swap interval
	bool mSwapIntervalZero;

	// mConsumerRunningBehind whether the consumer is running more than
	// one buffer behind the producer.
	mutable bool mConsumerRunningBehind;

	// mMutex is the mutex used to prevent concurrent access to the member
	// variables of Surface objects. It must be locked whenever the
	// member variables are accessed.
	mutable Mutex mMutex;

	// must be used from the lock/unlock thread
	sp<GraphicBuffer> mLockedBuffer;
	sp<GraphicBuffer> mPostedBuffer;
	bool mConnectedToCpu;

	// When a CPU producer is attached, this reflects the region that the
	// producer wished to update as well as whether the Surface was able to copy
	// the previous buffer back to allow a partial update.
	//
	// When a non-CPU producer is attached, this reflects the surface damage
	// (the change since the previous frame) passed in by the producer.
	Region mDirtyRegion;

	// Stores the current generation number. See setGenerationNumber and
	// IGraphicBufferProducer::setGenerationNumber for more information.
	uint32_t mGenerationNumber;

	// Caches the values that have been passed to the producer.
	bool mSharedBufferMode;
	bool mAutoRefresh;

	// If in shared buffer mode and auto refresh is enabled, store the shared
	// buffer slot and return it for all calls to queue/dequeue without going
	// over Binder.
	int mSharedBufferSlot;

	// This is true if the shared buffer has already been queued/canceled. It's
	// used to prevent a mismatch between the number of queue/dequeue calls.
	bool mSharedBufferHasBeenQueued;

	// These are used to satisfy the NATIVE_WINDOW_LAST_*_DURATION queries
	nsecs_t mLastDequeueDuration = 0;
	nsecs_t mLastQueueDuration = 0;

	Condition mQueueBufferCondition;

	uint64_t mNextFrameNumber;
	};

	namespace view {

	/**
	* A simple holder for an IGraphicBufferProducer, to match the managed-side
	* android.view.Surface parcelable behavior.
	*
	* This implements android/view/Surface.aidl
	*
	* TODO: Convert IGraphicBufferProducer into AIDL so that it can be directly
	* used in managed Binder calls.
	*/
	class Surface : public Parcelable {
	public:

	String16 name;
	sp<IGraphicBufferProducer> graphicBufferProducer;

	virtual status_t writeToParcel(Parcel* parcel) const override;
	virtual status_t readFromParcel(const Parcel* parcel) override;

	// nameAlreadyWritten set to true by Surface.java, because it splits
	// Parceling itself between managed and native code, so it only wants a part
	// of the full parceling to happen on its native side.
	status_t writeToParcel(Parcel* parcel, bool nameAlreadyWritten) const;

	// nameAlreadyRead set to true by Surface.java, because it splits
	// Parceling itself between managed and native code, so it only wants a part
	// of the full parceling to happen on its native side.
	status_t readFromParcel(const Parcel* parcel, bool nameAlreadyRead);

	private:

	static String16 readMaybeEmptyString16(const Parcel* parcel);
	};

	} // namespace view

	}; // namespace android

	#endif // ANDROID_GUI_SURFACE_H