1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_SURFACEFLINGERCONSUMER_H 18 #define ANDROID_SURFACEFLINGERCONSUMER_H 19 20 #include "DispSync.h" 21 #include <gui/GLConsumer.h> 22 23 namespace android { 24 // ---------------------------------------------------------------------------- 25 26 /* 27 * This is a thin wrapper around GLConsumer. 28 */ 29 class SurfaceFlingerConsumer : public GLConsumer { 30 public: 31 struct ContentsChangedListener: public FrameAvailableListener { 32 virtual void onSidebandStreamChanged() = 0; 33 }; 34 SurfaceFlingerConsumer(const sp<IGraphicBufferConsumer> & consumer,uint32_t tex)35 SurfaceFlingerConsumer(const sp<IGraphicBufferConsumer>& consumer, 36 uint32_t tex) 37 : GLConsumer(consumer, tex, GLConsumer::TEXTURE_EXTERNAL, false, false), 38 mTransformToDisplayInverse(false) 39 {} 40 41 class BufferRejecter { 42 friend class SurfaceFlingerConsumer; 43 virtual bool reject(const sp<GraphicBuffer>& buf, 44 const IGraphicBufferConsumer::BufferItem& item) = 0; 45 46 protected: ~BufferRejecter()47 virtual ~BufferRejecter() { } 48 }; 49 50 virtual status_t acquireBufferLocked(BufferQueue::BufferItem *item, nsecs_t presentWhen); 51 52 // This version of updateTexImage() takes a functor that may be used to 53 // reject the newly acquired buffer. Unlike the GLConsumer version, 54 // this does not guarantee that the buffer has been bound to the GL 55 // texture. 56 status_t updateTexImage(BufferRejecter* rejecter, const DispSync& dispSync); 57 58 // See GLConsumer::bindTextureImageLocked(). 59 status_t bindTextureImage(); 60 61 // must be called from SF main thread 62 bool getTransformToDisplayInverse() const; 63 64 // Sets the contents changed listener. This should be used instead of 65 // ConsumerBase::setFrameAvailableListener(). 66 void setContentsChangedListener(const wp<ContentsChangedListener>& listener); 67 68 sp<NativeHandle> getSidebandStream() const; 69 70 private: 71 nsecs_t computeExpectedPresent(const DispSync& dispSync); 72 73 virtual void onSidebandStreamChanged(); 74 75 wp<ContentsChangedListener> mContentsChangedListener; 76 77 // Indicates this buffer must be transformed by the inverse transform of the screen 78 // it is displayed onto. This is applied after GLConsumer::mCurrentTransform. 79 // This must be set/read from SurfaceFlinger's main thread. 80 bool mTransformToDisplayInverse; 81 }; 82 83 // ---------------------------------------------------------------------------- 84 }; // namespace android 85 86 #endif // ANDROID_SURFACEFLINGERCONSUMER_H 87