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 #include <stdint.h> 18 #include <sys/types.h> 19 20 #include <binder/PermissionCache.h> 21 #include <binder/IPCThreadState.h> 22 23 #include <private/android_filesystem_config.h> 24 25 #include "Client.h" 26 #include "Layer.h" 27 #include "SurfaceFlinger.h" 28 29 namespace android { 30 31 // --------------------------------------------------------------------------- 32 33 const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"); 34 35 // --------------------------------------------------------------------------- 36 37 Client::Client(const sp<SurfaceFlinger>& flinger) 38 : mFlinger(flinger) 39 { 40 } 41 42 Client::~Client() 43 { 44 const size_t count = mLayers.size(); 45 for (size_t i=0 ; i<count ; i++) { 46 sp<Layer> layer(mLayers.valueAt(i).promote()); 47 if (layer != 0) { 48 mFlinger->removeLayer(layer); 49 } 50 } 51 } 52 53 status_t Client::initCheck() const { 54 return NO_ERROR; 55 } 56 57 void Client::attachLayer(const sp<IBinder>& handle, const sp<Layer>& layer) 58 { 59 Mutex::Autolock _l(mLock); 60 mLayers.add(handle, layer); 61 } 62 63 void Client::detachLayer(const Layer* layer) 64 { 65 Mutex::Autolock _l(mLock); 66 // we do a linear search here, because this doesn't happen often 67 const size_t count = mLayers.size(); 68 for (size_t i=0 ; i<count ; i++) { 69 if (mLayers.valueAt(i) == layer) { 70 mLayers.removeItemsAt(i, 1); 71 break; 72 } 73 } 74 } 75 sp<Layer> Client::getLayerUser(const sp<IBinder>& handle) const 76 { 77 Mutex::Autolock _l(mLock); 78 sp<Layer> lbc; 79 wp<Layer> layer(mLayers.valueFor(handle)); 80 if (layer != 0) { 81 lbc = layer.promote(); 82 ALOGE_IF(lbc==0, "getLayerUser(name=%p) is dead", handle.get()); 83 } 84 return lbc; 85 } 86 87 88 status_t Client::onTransact( 89 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 90 { 91 // these must be checked 92 IPCThreadState* ipc = IPCThreadState::self(); 93 const int pid = ipc->getCallingPid(); 94 const int uid = ipc->getCallingUid(); 95 const int self_pid = getpid(); 96 if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) { 97 // we're called from a different process, do the real check 98 if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger)) 99 { 100 ALOGE("Permission Denial: " 101 "can't openGlobalTransaction pid=%d, uid=%d", pid, uid); 102 return PERMISSION_DENIED; 103 } 104 } 105 return BnSurfaceComposerClient::onTransact(code, data, reply, flags); 106 } 107 108 109 status_t Client::createSurface( 110 const String8& name, 111 uint32_t w, uint32_t h, PixelFormat format, uint32_t flags, 112 sp<IBinder>* handle, 113 sp<IGraphicBufferProducer>* gbp) 114 { 115 /* 116 * createSurface must be called from the GL thread so that it can 117 * have access to the GL context. 118 */ 119 120 class MessageCreateLayer : public MessageBase { 121 SurfaceFlinger* flinger; 122 Client* client; 123 sp<IBinder>* handle; 124 sp<IGraphicBufferProducer>* gbp; 125 status_t result; 126 const String8& name; 127 uint32_t w, h; 128 PixelFormat format; 129 uint32_t flags; 130 public: 131 MessageCreateLayer(SurfaceFlinger* flinger, 132 const String8& name, Client* client, 133 uint32_t w, uint32_t h, PixelFormat format, uint32_t flags, 134 sp<IBinder>* handle, 135 sp<IGraphicBufferProducer>* gbp) 136 : flinger(flinger), client(client), 137 handle(handle), gbp(gbp), 138 name(name), w(w), h(h), format(format), flags(flags) { 139 } 140 status_t getResult() const { return result; } 141 virtual bool handler() { 142 result = flinger->createLayer(name, client, w, h, format, flags, 143 handle, gbp); 144 return true; 145 } 146 }; 147 148 sp<MessageBase> msg = new MessageCreateLayer(mFlinger.get(), 149 name, this, w, h, format, flags, handle, gbp); 150 mFlinger->postMessageSync(msg); 151 return static_cast<MessageCreateLayer*>( msg.get() )->getResult(); 152 } 153 154 status_t Client::destroySurface(const sp<IBinder>& handle) { 155 return mFlinger->onLayerRemoved(this, handle); 156 } 157 158 status_t Client::clearLayerFrameStats(const sp<IBinder>& handle) const { 159 sp<Layer> layer = getLayerUser(handle); 160 if (layer == NULL) { 161 return NAME_NOT_FOUND; 162 } 163 layer->clearFrameStats(); 164 return NO_ERROR; 165 } 166 167 status_t Client::getLayerFrameStats(const sp<IBinder>& handle, FrameStats* outStats) const { 168 sp<Layer> layer = getLayerUser(handle); 169 if (layer == NULL) { 170 return NAME_NOT_FOUND; 171 } 172 layer->getFrameStats(outStats); 173 return NO_ERROR; 174 } 175 176 // --------------------------------------------------------------------------- 177 }; // namespace android 178
