1 /* 2 * Copyright 2022 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 "LayerHandle.h" 18 #include <cstdint> 19 #include "Layer.h" 20 #include "LayerCreationArgs.h" 21 #include "SurfaceFlinger.h" 22 23 namespace android::surfaceflinger { 24 LayerHandle(const sp<android::SurfaceFlinger> & flinger,const sp<android::Layer> & layer)25LayerHandle::LayerHandle(const sp<android::SurfaceFlinger>& flinger, 26 const sp<android::Layer>& layer) 27 : mFlinger(flinger), mLayer(layer), mLayerId(static_cast<uint32_t>(layer->getSequence())) {} 28 ~LayerHandle()29LayerHandle::~LayerHandle() { 30 if (mFlinger) { 31 mFlinger->onHandleDestroyed(mLayer, mLayerId); 32 } 33 } 34 35 const String16 LayerHandle::kDescriptor = String16("android.Layer.LayerHandle"); 36 fromIBinder(const sp<IBinder> & binder)37sp<LayerHandle> LayerHandle::fromIBinder(const sp<IBinder>& binder) { 38 if (binder == nullptr) { 39 return nullptr; 40 } 41 42 BBinder* b = binder->localBinder(); 43 if (b == nullptr || b->getInterfaceDescriptor() != LayerHandle::kDescriptor) { 44 ALOGD("handle does not have a valid descriptor"); 45 return nullptr; 46 } 47 48 // We can safely cast this binder since its local and we verified its interface descriptor. 49 return sp<LayerHandle>::cast(binder); 50 } 51 getLayer(const sp<IBinder> & binder)52sp<android::Layer> LayerHandle::getLayer(const sp<IBinder>& binder) { 53 sp<LayerHandle> handle = LayerHandle::fromIBinder(binder); 54 return handle ? handle->mLayer : nullptr; 55 } 56 getLayerId(const sp<IBinder> & binder)57uint32_t LayerHandle::getLayerId(const sp<IBinder>& binder) { 58 sp<LayerHandle> handle = LayerHandle::fromIBinder(binder); 59 return handle ? handle->mLayerId : UNASSIGNED_LAYER_ID; 60 } 61 62 } // namespace android::surfaceflinger 63