IGraphicBufferAlloc.cpp revision 4cb18881b55b82a24873ccd8e298bc2d5a9c17e5
19a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis/* 29a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * Copyright (C) 2011 The Android Open Source Project 39a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * 49a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * Licensed under the Apache License, Version 2.0 (the "License"); 59a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * you may not use this file except in compliance with the License. 69a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * You may obtain a copy of the License at 79a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * 89a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * http://www.apache.org/licenses/LICENSE-2.0 99a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * 109a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * Unless required by applicable law or agreed to in writing, software 119a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * distributed under the License is distributed on an "AS IS" BASIS, 129a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * See the License for the specific language governing permissions and 149a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis * limitations under the License. 159a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis */ 169a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 179a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis// tag as surfaceflinger 189a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#define LOG_TAG "SurfaceFlinger" 199a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 209a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <stdint.h> 219a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <sys/types.h> 229a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 239a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <binder/Parcel.h> 249a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 259a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <ui/GraphicBuffer.h> 269a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 279a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <surfaceflinger/IGraphicBufferAlloc.h> 289a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 299a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis// --------------------------------------------------------------------------- 309a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 319a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennisnamespace android { 329a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 339a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennisenum { 349a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis CREATE_GRAPHIC_BUFFER = IBinder::FIRST_CALL_TRANSACTION, 359a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis}; 369a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 379a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennisclass BpGraphicBufferAlloc : public BpInterface<IGraphicBufferAlloc> 389a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis{ 399a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennispublic: 409a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis BpGraphicBufferAlloc(const sp<IBinder>& impl) 419a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis : BpInterface<IGraphicBufferAlloc>(impl) 429a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis { 439a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } 449a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 459a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h, 469a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis PixelFormat format, uint32_t usage) { 479a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis Parcel data, reply; 484cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian data.writeInterfaceToken(IGraphicBufferAlloc::getInterfaceDescriptor()); 499a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis data.writeInt32(w); 509a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis data.writeInt32(h); 519a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis data.writeInt32(format); 529a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis data.writeInt32(usage); 539a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis remote()->transact(CREATE_GRAPHIC_BUFFER, data, &reply); 549a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis sp<GraphicBuffer> graphicBuffer; 559a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis bool nonNull = (bool)reply.readInt32(); 569a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis if (nonNull) { 579a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis graphicBuffer = new GraphicBuffer(); 589a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis reply.read(*graphicBuffer); 594cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // reply.readStrongBinder(); 604cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // here we don't even have to read the BufferReference from 614cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // the parcel, it'll die with the parcel. 629a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } 639a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis return graphicBuffer; 649a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } 659a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis}; 669a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 679a78c90cd46b2a3bd637b056873149d3b94384b4Jamie GennisIMPLEMENT_META_INTERFACE(GraphicBufferAlloc, "android.ui.IGraphicBufferAlloc"); 689a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 699a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis// ---------------------------------------------------------------------- 709a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 719a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennisstatus_t BnGraphicBufferAlloc::onTransact( 729a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 739a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis{ 749a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis // codes that don't require permission check 759a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 764cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian /* BufferReference just keeps a strong reference to a 774cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian * GraphicBuffer until it is destroyed (that is, until 784cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian * no local or remote process have a reference to it). 794cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian */ 804cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian class BufferReference : public BBinder { 814cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian sp<GraphicBuffer> buffer; 824cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian public: 834cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian BufferReference(const sp<GraphicBuffer>& buffer) : buffer(buffer) { } 844cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian }; 854cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian 864cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian 879a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis switch(code) { 889a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis case CREATE_GRAPHIC_BUFFER: { 899a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis CHECK_INTERFACE(IGraphicBufferAlloc, data, reply); 909a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis uint32_t w = data.readInt32(); 919a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis uint32_t h = data.readInt32(); 929a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis PixelFormat format = data.readInt32(); 939a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis uint32_t usage = data.readInt32(); 949a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis sp<GraphicBuffer> result(createGraphicBuffer(w, h, format, usage)); 959a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis reply->writeInt32(result != 0); 969a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis if (result != 0) { 979a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis reply->write(*result); 984cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // We add a BufferReference to this parcel to make sure the 994cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // buffer stays alive until the GraphicBuffer object on 1004cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // the other side has been created. 1014cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // This is needed so that the buffer handle can be 1024cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // registered before the buffer is destroyed on implementations 1034cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian // that do not use file-descriptors to track their buffers. 1044cb18881b55b82a24873ccd8e298bc2d5a9c17e5Mathias Agopian reply->writeStrongBinder( new BufferReference(result) ); 1059a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } 1069a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis return NO_ERROR; 1079a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } break; 1089a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis default: 1099a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis return BBinder::onTransact(code, data, reply, flags); 1109a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis } 1119a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis} 1129a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis 1139a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis}; // namespace android 114