| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // tag as surfaceflinger |
| #define LOG_TAG "SurfaceFlinger" |
| |
| #include <stdio.h> |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <binder/Parcel.h> |
| #include <binder/IMemory.h> |
| #include <binder/IPCThreadState.h> |
| #include <binder/IServiceManager.h> |
| |
| #include <ui/Point.h> |
| #include <ui/Rect.h> |
| |
| #include <surfaceflinger/ISurface.h> |
| #include <surfaceflinger/ISurfaceComposerClient.h> |
| #include <private/surfaceflinger/LayerState.h> |
| |
| // --------------------------------------------------------------------------- |
| |
| /* ideally AID_GRAPHICS would be in a semi-public header |
| * or there would be a way to map a user/group name to its id |
| */ |
| #ifndef AID_GRAPHICS |
| #define AID_GRAPHICS 1003 |
| #endif |
| |
| #define LIKELY( exp ) (__builtin_expect( (exp) != 0, true )) |
| #define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false )) |
| |
| // --------------------------------------------------------------------------- |
| |
| namespace android { |
| |
| enum { |
| GET_CBLK = IBinder::FIRST_CALL_TRANSACTION, |
| CREATE_SURFACE, |
| DESTROY_SURFACE, |
| SET_STATE |
| }; |
| |
| class BpSurfaceComposerClient : public BpInterface<ISurfaceComposerClient> |
| { |
| public: |
| BpSurfaceComposerClient(const sp<IBinder>& impl) |
| : BpInterface<ISurfaceComposerClient>(impl) |
| { |
| } |
| |
| virtual sp<IMemoryHeap> getControlBlock() const |
| { |
| Parcel data, reply; |
| data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor()); |
| remote()->transact(GET_CBLK, data, &reply); |
| return interface_cast<IMemoryHeap>(reply.readStrongBinder()); |
| } |
| |
| virtual sp<ISurface> createSurface( surface_data_t* params, |
| int pid, |
| const String8& name, |
| DisplayID display, |
| uint32_t w, |
| uint32_t h, |
| PixelFormat format, |
| uint32_t flags) |
| { |
| Parcel data, reply; |
| data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor()); |
| data.writeInt32(pid); |
| data.writeString8(name); |
| data.writeInt32(display); |
| data.writeInt32(w); |
| data.writeInt32(h); |
| data.writeInt32(format); |
| data.writeInt32(flags); |
| remote()->transact(CREATE_SURFACE, data, &reply); |
| params->readFromParcel(reply); |
| return interface_cast<ISurface>(reply.readStrongBinder()); |
| } |
| |
| virtual status_t destroySurface(SurfaceID sid) |
| { |
| Parcel data, reply; |
| data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor()); |
| data.writeInt32(sid); |
| remote()->transact(DESTROY_SURFACE, data, &reply); |
| return reply.readInt32(); |
| } |
| |
| virtual status_t setState(int32_t count, const layer_state_t* states) |
| { |
| Parcel data, reply; |
| data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor()); |
| data.writeInt32(count); |
| for (int i=0 ; i<count ; i++) |
| states[i].write(data); |
| remote()->transact(SET_STATE, data, &reply); |
| return reply.readInt32(); |
| } |
| }; |
| |
| IMPLEMENT_META_INTERFACE(SurfaceComposerClient, "android.ui.ISurfaceComposerClient"); |
| |
| // ---------------------------------------------------------------------- |
| |
| status_t BnSurfaceComposerClient::onTransact( |
| uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) |
| { |
| // codes that don't require permission check |
| |
| switch(code) { |
| case GET_CBLK: { |
| CHECK_INTERFACE(ISurfaceComposerClient, data, reply); |
| sp<IMemoryHeap> ctl(getControlBlock()); |
| reply->writeStrongBinder(ctl->asBinder()); |
| return NO_ERROR; |
| } break; |
| } |
| |
| // these must be checked |
| |
| IPCThreadState* ipc = IPCThreadState::self(); |
| const int pid = ipc->getCallingPid(); |
| const int uid = ipc->getCallingUid(); |
| const int self_pid = getpid(); |
| if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS)) { |
| // we're called from a different process, do the real check |
| if (!checkCallingPermission( |
| String16("android.permission.ACCESS_SURFACE_FLINGER"))) |
| { |
| LOGE("Permission Denial: " |
| "can't openGlobalTransaction pid=%d, uid=%d", pid, uid); |
| return PERMISSION_DENIED; |
| } |
| } |
| |
| switch(code) { |
| case CREATE_SURFACE: { |
| CHECK_INTERFACE(ISurfaceComposerClient, data, reply); |
| surface_data_t params; |
| int32_t pid = data.readInt32(); |
| String8 name = data.readString8(); |
| DisplayID display = data.readInt32(); |
| uint32_t w = data.readInt32(); |
| uint32_t h = data.readInt32(); |
| PixelFormat format = data.readInt32(); |
| uint32_t flags = data.readInt32(); |
| sp<ISurface> s = createSurface(¶ms, pid, name, display, w, h, |
| format, flags); |
| params.writeToParcel(reply); |
| reply->writeStrongBinder(s->asBinder()); |
| return NO_ERROR; |
| } break; |
| case DESTROY_SURFACE: { |
| CHECK_INTERFACE(ISurfaceComposerClient, data, reply); |
| reply->writeInt32( destroySurface( data.readInt32() ) ); |
| return NO_ERROR; |
| } break; |
| case SET_STATE: { |
| CHECK_INTERFACE(ISurfaceComposerClient, data, reply); |
| int32_t count = data.readInt32(); |
| layer_state_t* states = new layer_state_t[count]; |
| for (int i=0 ; i<count ; i++) |
| states[i].read(data); |
| status_t err = setState(count, states); |
| delete [] states; |
| reply->writeInt32(err); |
| return NO_ERROR; |
| } break; |
| default: |
| return BBinder::onTransact(code, data, reply, flags); |
| } |
| } |
| |
| // ---------------------------------------------------------------------- |
| |
| status_t ISurfaceComposerClient::surface_data_t::readFromParcel(const Parcel& parcel) |
| { |
| token = parcel.readInt32(); |
| identity = parcel.readInt32(); |
| width = parcel.readInt32(); |
| height = parcel.readInt32(); |
| format = parcel.readInt32(); |
| return NO_ERROR; |
| } |
| |
| status_t ISurfaceComposerClient::surface_data_t::writeToParcel(Parcel* parcel) const |
| { |
| parcel->writeInt32(token); |
| parcel->writeInt32(identity); |
| parcel->writeInt32(width); |
| parcel->writeInt32(height); |
| parcel->writeInt32(format); |
| return NO_ERROR; |
| } |
| |
| }; // namespace android |