/* * 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 #include #include #include #include #include #include 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 { 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& 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 getIGraphicBufferProducer() const; /* convenience function to check that the given surface is non NULL as * well as its IGraphicBufferProducer */ static bool isValid(const sp& 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& stream); 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 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); 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 setBuffersDimensions(int w, int h); virtual int setBuffersUserDimensions(int w, int h); virtual int setBuffersFormat(int format); virtual int setScalingMode(int mode); virtual int setBuffersTransform(int transform); virtual int setBuffersTimestamp(int64_t timestamp); virtual int setCrop(Rect const* rect); virtual int setUsage(uint32_t reqUsage); public: virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds); virtual int unlockAndPost(); 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 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 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. uint32_t 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; // 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; // 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 mLockedBuffer; sp mPostedBuffer; bool mConnectedToCpu; // must be accessed from lock/unlock thread only Region mDirtyRegion; }; }; // namespace android #endif // ANDROID_GUI_SURFACE_H