| /* |
| * 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 <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. |
| */ |
| 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; |
| |
| 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); |
| |
| 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 query(int what, int* value) const; |
| virtual int setSwapInterval(int interval); |
| |
| virtual int lockBuffer_DEPRECATED(ANativeWindowBuffer* buffer); |
| |
| virtual int connect(int api); |
| virtual int disconnect(int api); |
| virtual int setBufferCount(int bufferCount); |
| virtual int setMaxDequeuedBufferCount(int maxDequeuedBuffers); |
| virtual int setAsyncMode(bool async); |
| 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 setScalingMode(int mode); |
| 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 lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds); |
| virtual int unlockAndPost(); |
| |
| 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; |
| }; |
| |
| }; // namespace android |
| |
| #endif // ANDROID_GUI_SURFACE_H |