Surface.h revision c2e7788721489c5a2ef681fd0bfa591d2ce41175
1/* 2 * Copyright (C) 2010 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_GUI_SURFACE_H 18#define ANDROID_GUI_SURFACE_H 19 20#include <gui/IGraphicBufferProducer.h> 21#include <gui/BufferQueue.h> 22 23#include <ui/ANativeObjectBase.h> 24#include <ui/Region.h> 25 26#include <utils/RefBase.h> 27#include <utils/threads.h> 28#include <utils/KeyedVector.h> 29 30struct ANativeWindow_Buffer; 31 32namespace android { 33 34/* 35 * An implementation of ANativeWindow that feeds graphics buffers into a 36 * BufferQueue. 37 * 38 * This is typically used by programs that want to render frames through 39 * some means (maybe OpenGL, a software renderer, or a hardware decoder) 40 * and have the frames they create forwarded to SurfaceFlinger for 41 * compositing. For example, a video decoder could render a frame and call 42 * eglSwapBuffers(), which invokes ANativeWindow callbacks defined by 43 * Surface. Surface then forwards the buffers through Binder IPC 44 * to the BufferQueue's producer interface, providing the new frame to a 45 * consumer such as GLConsumer. 46 */ 47class Surface 48 : public ANativeObjectBase<ANativeWindow, Surface, RefBase> 49{ 50public: 51 52 /* 53 * creates a Surface from the given IGraphicBufferProducer (which concrete 54 * implementation is a BufferQueue). 55 * 56 * Surface is mainly state-less while it's disconnected, it can be 57 * viewed as a glorified IGraphicBufferProducer holder. It's therefore 58 * safe to create other Surfaces from the same IGraphicBufferProducer. 59 * 60 * However, once a Surface is connected, it'll prevent other Surfaces 61 * referring to the same IGraphicBufferProducer to become connected and 62 * therefore prevent them to be used as actual producers of buffers. 63 * 64 * the controlledByApp flag indicates that this Surface (producer) is 65 * controlled by the application. This flag is used at connect time. 66 */ 67 Surface(const sp<IGraphicBufferProducer>& bufferProducer, bool controlledByApp = false); 68 69 /* getIGraphicBufferProducer() returns the IGraphicBufferProducer this 70 * Surface was created with. Usually it's an error to use the 71 * IGraphicBufferProducer while the Surface is connected. 72 */ 73 sp<IGraphicBufferProducer> getIGraphicBufferProducer() const; 74 75 /* convenience function to check that the given surface is non NULL as 76 * well as its IGraphicBufferProducer */ 77 static bool isValid(const sp<Surface>& surface) { 78 return surface != NULL && surface->getIGraphicBufferProducer() != NULL; 79 } 80 81 /* Attaches a sideband buffer stream to the Surface's IGraphicBufferProducer. 82 * 83 * A sideband stream is a device-specific mechanism for passing buffers 84 * from the producer to the consumer without using dequeueBuffer/ 85 * queueBuffer. If a sideband stream is present, the consumer can choose 86 * whether to acquire buffers from the sideband stream or from the queued 87 * buffers. 88 * 89 * Passing NULL or a different stream handle will detach the previous 90 * handle if any. 91 */ 92 void setSidebandStream(const sp<NativeHandle>& stream); 93 94 /* Allocates buffers based on the current dimensions/format. 95 * 96 * This function will allocate up to the maximum number of buffers 97 * permitted by the current BufferQueue configuration. It will use the 98 * default format and dimensions. This is most useful to avoid an allocation 99 * delay during dequeueBuffer. If there are already the maximum number of 100 * buffers allocated, this function has no effect. 101 */ 102 void allocateBuffers(); 103 104 /* Sets the generation number on the IGraphicBufferProducer and updates the 105 * generation number on any buffers attached to the Surface after this call. 106 * See IGBP::setGenerationNumber for more information. */ 107 status_t setGenerationNumber(uint32_t generationNumber); 108 109 // See IGraphicBufferProducer::getConsumerName 110 String8 getConsumerName() const; 111 112 // See IGraphicBufferProducer::getNextFrameNumber 113 uint64_t getNextFrameNumber() const; 114 115 /* Set the scaling mode to be used with a Surface. 116 * See NATIVE_WINDOW_SET_SCALING_MODE and its parameters 117 * in <system/window.h>. */ 118 int setScalingMode(int mode); 119 120protected: 121 virtual ~Surface(); 122 123private: 124 // can't be copied 125 Surface& operator = (const Surface& rhs); 126 Surface(const Surface& rhs); 127 128 // ANativeWindow hooks 129 static int hook_cancelBuffer(ANativeWindow* window, 130 ANativeWindowBuffer* buffer, int fenceFd); 131 static int hook_dequeueBuffer(ANativeWindow* window, 132 ANativeWindowBuffer** buffer, int* fenceFd); 133 static int hook_perform(ANativeWindow* window, int operation, ...); 134 static int hook_query(const ANativeWindow* window, int what, int* value); 135 static int hook_queueBuffer(ANativeWindow* window, 136 ANativeWindowBuffer* buffer, int fenceFd); 137 static int hook_setSwapInterval(ANativeWindow* window, int interval); 138 139 static int hook_cancelBuffer_DEPRECATED(ANativeWindow* window, 140 ANativeWindowBuffer* buffer); 141 static int hook_dequeueBuffer_DEPRECATED(ANativeWindow* window, 142 ANativeWindowBuffer** buffer); 143 static int hook_lockBuffer_DEPRECATED(ANativeWindow* window, 144 ANativeWindowBuffer* buffer); 145 static int hook_queueBuffer_DEPRECATED(ANativeWindow* window, 146 ANativeWindowBuffer* buffer); 147 148 int dispatchConnect(va_list args); 149 int dispatchDisconnect(va_list args); 150 int dispatchSetBufferCount(va_list args); 151 int dispatchSetBuffersGeometry(va_list args); 152 int dispatchSetBuffersDimensions(va_list args); 153 int dispatchSetBuffersUserDimensions(va_list args); 154 int dispatchSetBuffersFormat(va_list args); 155 int dispatchSetScalingMode(va_list args); 156 int dispatchSetBuffersTransform(va_list args); 157 int dispatchSetBuffersStickyTransform(va_list args); 158 int dispatchSetBuffersTimestamp(va_list args); 159 int dispatchSetCrop(va_list args); 160 int dispatchSetPostTransformCrop(va_list args); 161 int dispatchSetUsage(va_list args); 162 int dispatchLock(va_list args); 163 int dispatchUnlockAndPost(va_list args); 164 int dispatchSetSidebandStream(va_list args); 165 int dispatchSetBuffersDataSpace(va_list args); 166 int dispatchSetSurfaceDamage(va_list args); 167 int dispatchSetSingleBufferMode(va_list args); 168 169protected: 170 virtual int dequeueBuffer(ANativeWindowBuffer** buffer, int* fenceFd); 171 virtual int cancelBuffer(ANativeWindowBuffer* buffer, int fenceFd); 172 virtual int queueBuffer(ANativeWindowBuffer* buffer, int fenceFd); 173 virtual int perform(int operation, va_list args); 174 virtual int query(int what, int* value) const; 175 virtual int setSwapInterval(int interval); 176 177 virtual int lockBuffer_DEPRECATED(ANativeWindowBuffer* buffer); 178 179 virtual int connect(int api); 180 virtual int disconnect(int api); 181 virtual int setBufferCount(int bufferCount); 182 virtual int setBuffersDimensions(uint32_t width, uint32_t height); 183 virtual int setBuffersUserDimensions(uint32_t width, uint32_t height); 184 virtual int setBuffersFormat(PixelFormat format); 185 virtual int setBuffersTransform(uint32_t transform); 186 virtual int setBuffersStickyTransform(uint32_t transform); 187 virtual int setBuffersTimestamp(int64_t timestamp); 188 virtual int setBuffersDataSpace(android_dataspace dataSpace); 189 virtual int setCrop(Rect const* rect); 190 virtual int setUsage(uint32_t reqUsage); 191 virtual void setSurfaceDamage(android_native_rect_t* rects, size_t numRects); 192 193public: 194 virtual int setMaxDequeuedBufferCount(int maxDequeuedBuffers); 195 virtual int setAsyncMode(bool async); 196 virtual int setSingleBufferMode(bool singleBufferMode); 197 virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds); 198 virtual int unlockAndPost(); 199 200 virtual int connect(int api, const sp<IProducerListener>& listener); 201 virtual int detachNextBuffer(sp<GraphicBuffer>* outBuffer, 202 sp<Fence>* outFence); 203 virtual int attachBuffer(ANativeWindowBuffer*); 204 205protected: 206 enum { NUM_BUFFER_SLOTS = BufferQueue::NUM_BUFFER_SLOTS }; 207 enum { DEFAULT_FORMAT = PIXEL_FORMAT_RGBA_8888 }; 208 209private: 210 void freeAllBuffers(); 211 int getSlotFromBufferLocked(android_native_buffer_t* buffer) const; 212 213 struct BufferSlot { 214 sp<GraphicBuffer> buffer; 215 Region dirtyRegion; 216 }; 217 218 // mSurfaceTexture is the interface to the surface texture server. All 219 // operations on the surface texture client ultimately translate into 220 // interactions with the server using this interface. 221 // TODO: rename to mBufferProducer 222 sp<IGraphicBufferProducer> mGraphicBufferProducer; 223 224 // mSlots stores the buffers that have been allocated for each buffer slot. 225 // It is initialized to null pointers, and gets filled in with the result of 226 // IGraphicBufferProducer::requestBuffer when the client dequeues a buffer from a 227 // slot that has not yet been used. The buffer allocated to a slot will also 228 // be replaced if the requested buffer usage or geometry differs from that 229 // of the buffer allocated to a slot. 230 BufferSlot mSlots[NUM_BUFFER_SLOTS]; 231 232 // mReqWidth is the buffer width that will be requested at the next dequeue 233 // operation. It is initialized to 1. 234 uint32_t mReqWidth; 235 236 // mReqHeight is the buffer height that will be requested at the next 237 // dequeue operation. It is initialized to 1. 238 uint32_t mReqHeight; 239 240 // mReqFormat is the buffer pixel format that will be requested at the next 241 // deuque operation. It is initialized to PIXEL_FORMAT_RGBA_8888. 242 PixelFormat mReqFormat; 243 244 // mReqUsage is the set of buffer usage flags that will be requested 245 // at the next deuque operation. It is initialized to 0. 246 uint32_t mReqUsage; 247 248 // mTimestamp is the timestamp that will be used for the next buffer queue 249 // operation. It defaults to NATIVE_WINDOW_TIMESTAMP_AUTO, which means that 250 // a timestamp is auto-generated when queueBuffer is called. 251 int64_t mTimestamp; 252 253 // mDataSpace is the buffer dataSpace that will be used for the next buffer 254 // queue operation. It defaults to HAL_DATASPACE_UNKNOWN, which 255 // means that the buffer contains some type of color data. 256 android_dataspace mDataSpace; 257 258 // mCrop is the crop rectangle that will be used for the next buffer 259 // that gets queued. It is set by calling setCrop. 260 Rect mCrop; 261 262 // mScalingMode is the scaling mode that will be used for the next 263 // buffers that get queued. It is set by calling setScalingMode. 264 int mScalingMode; 265 266 // mTransform is the transform identifier that will be used for the next 267 // buffer that gets queued. It is set by calling setTransform. 268 uint32_t mTransform; 269 270 // mStickyTransform is a transform that is applied on top of mTransform 271 // in each buffer that is queued. This is typically used to force the 272 // compositor to apply a transform, and will prevent the transform hint 273 // from being set by the compositor. 274 uint32_t mStickyTransform; 275 276 // mDefaultWidth is default width of the buffers, regardless of the 277 // native_window_set_buffers_dimensions call. 278 uint32_t mDefaultWidth; 279 280 // mDefaultHeight is default height of the buffers, regardless of the 281 // native_window_set_buffers_dimensions call. 282 uint32_t mDefaultHeight; 283 284 // mUserWidth, if non-zero, is an application-specified override 285 // of mDefaultWidth. This is lower priority than the width set by 286 // native_window_set_buffers_dimensions. 287 uint32_t mUserWidth; 288 289 // mUserHeight, if non-zero, is an application-specified override 290 // of mDefaultHeight. This is lower priority than the height set 291 // by native_window_set_buffers_dimensions. 292 uint32_t mUserHeight; 293 294 // mTransformHint is the transform probably applied to buffers of this 295 // window. this is only a hint, actual transform may differ. 296 uint32_t mTransformHint; 297 298 // mProducerControlledByApp whether this buffer producer is controlled 299 // by the application 300 bool mProducerControlledByApp; 301 302 // mSwapIntervalZero set if we should drop buffers at queue() time to 303 // achieve an asynchronous swap interval 304 bool mSwapIntervalZero; 305 306 // mConsumerRunningBehind whether the consumer is running more than 307 // one buffer behind the producer. 308 mutable bool mConsumerRunningBehind; 309 310 // mMutex is the mutex used to prevent concurrent access to the member 311 // variables of Surface objects. It must be locked whenever the 312 // member variables are accessed. 313 mutable Mutex mMutex; 314 315 // must be used from the lock/unlock thread 316 sp<GraphicBuffer> mLockedBuffer; 317 sp<GraphicBuffer> mPostedBuffer; 318 bool mConnectedToCpu; 319 320 // When a CPU producer is attached, this reflects the region that the 321 // producer wished to update as well as whether the Surface was able to copy 322 // the previous buffer back to allow a partial update. 323 // 324 // When a non-CPU producer is attached, this reflects the surface damage 325 // (the change since the previous frame) passed in by the producer. 326 Region mDirtyRegion; 327 328 // Stores the current generation number. See setGenerationNumber and 329 // IGraphicBufferProducer::setGenerationNumber for more information. 330 uint32_t mGenerationNumber; 331}; 332 333}; // namespace android 334 335#endif // ANDROID_GUI_SURFACE_H 336