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Diffstat (limited to 'libs/surfaceflinger_client/ISurfaceComposerClient.cpp')
| -rw-r--r-- | libs/surfaceflinger_client/ISurfaceComposerClient.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/libs/surfaceflinger_client/ISurfaceComposerClient.cpp b/libs/surfaceflinger_client/ISurfaceComposerClient.cpp new file mode 100644 index 000000000000..2cc1f8e34383 --- /dev/null +++ b/libs/surfaceflinger_client/ISurfaceComposerClient.cpp @@ -0,0 +1,231 @@ +/* + * 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, + GET_TOKEN, + 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 ssize_t getTokenForSurface(const sp<ISurface>& sur) const + { + Parcel data, reply; + data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor()); + data.writeStrongBinder(sur->asBinder()); + remote()->transact(GET_TOKEN, data, &reply); + return reply.readInt32(); + } + + 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; + case GET_TOKEN: { + CHECK_INTERFACE(ISurfaceComposerClient, data, reply); + sp<ISurface> sur = interface_cast<ISurface>(data.readStrongBinder()); + ssize_t token = getTokenForSurface(sur); + reply->writeInt32(token); + 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 |