216 lines
7.2 KiB
C++
216 lines
7.2 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// tag as surfaceflinger
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#define LOG_TAG "SurfaceFlinger"
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Parcel.h>
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#include <utils/IMemory.h>
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#include <utils/IPCThreadState.h>
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#include <utils/IServiceManager.h>
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#include <ui/ISurface.h>
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#include <ui/ISurfaceFlingerClient.h>
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#include <ui/Point.h>
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#include <ui/Rect.h>
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#include <private/ui/LayerState.h>
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// ---------------------------------------------------------------------------
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/* ideally AID_GRAPHICS would be in a semi-public header
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* or there would be a way to map a user/group name to its id
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*/
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#ifndef AID_GRAPHICS
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#define AID_GRAPHICS 1003
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#endif
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#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
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#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
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// ---------------------------------------------------------------------------
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namespace android {
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enum {
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GET_CBLK = IBinder::FIRST_CALL_TRANSACTION,
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CREATE_SURFACE,
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DESTROY_SURFACE,
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SET_STATE
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};
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class BpSurfaceFlingerClient : public BpInterface<ISurfaceFlingerClient>
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{
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public:
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BpSurfaceFlingerClient(const sp<IBinder>& impl)
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: BpInterface<ISurfaceFlingerClient>(impl)
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{
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}
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virtual void getControlBlocks(sp<IMemory>* ctl) const
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{
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Parcel data, reply;
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data.writeInterfaceToken(ISurfaceFlingerClient::getInterfaceDescriptor());
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remote()->transact(GET_CBLK, data, &reply);
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*ctl = interface_cast<IMemory>(reply.readStrongBinder());
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}
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virtual sp<ISurface> createSurface( surface_data_t* params,
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int pid,
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DisplayID display,
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uint32_t w,
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uint32_t h,
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PixelFormat format,
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uint32_t flags)
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{
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Parcel data, reply;
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data.writeInterfaceToken(ISurfaceFlingerClient::getInterfaceDescriptor());
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data.writeInt32(pid);
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data.writeInt32(display);
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data.writeInt32(w);
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data.writeInt32(h);
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data.writeInt32(format);
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data.writeInt32(flags);
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remote()->transact(CREATE_SURFACE, data, &reply);
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params->readFromParcel(reply);
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return interface_cast<ISurface>(reply.readStrongBinder());
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}
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virtual status_t destroySurface(SurfaceID sid)
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{
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Parcel data, reply;
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data.writeInterfaceToken(ISurfaceFlingerClient::getInterfaceDescriptor());
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data.writeInt32(sid);
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remote()->transact(DESTROY_SURFACE, data, &reply);
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return reply.readInt32();
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}
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virtual status_t setState(int32_t count, const layer_state_t* states)
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{
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Parcel data, reply;
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data.writeInterfaceToken(ISurfaceFlingerClient::getInterfaceDescriptor());
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data.writeInt32(count);
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for (int i=0 ; i<count ; i++)
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states[i].write(data);
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remote()->transact(SET_STATE, data, &reply);
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return reply.readInt32();
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}
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};
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IMPLEMENT_META_INTERFACE(SurfaceFlingerClient, "android.ui.ISurfaceFlingerClient");
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// ----------------------------------------------------------------------
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#define CHECK_INTERFACE(interface, data, reply) \
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do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \
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LOGW("Call incorrectly routed to " #interface); \
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return PERMISSION_DENIED; \
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} } while (0)
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status_t BnSurfaceFlingerClient::onTransact(
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uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
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{
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// codes that don't require permission check
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switch(code) {
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case GET_CBLK: {
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CHECK_INTERFACE(ISurfaceFlingerClient, data, reply);
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sp<IMemory> ctl;
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getControlBlocks(&ctl);
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reply->writeStrongBinder(ctl->asBinder());
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return NO_ERROR;
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} break;
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}
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// these must be checked
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IPCThreadState* ipc = IPCThreadState::self();
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const int pid = ipc->getCallingPid();
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const int uid = ipc->getCallingUid();
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const int self_pid = getpid();
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if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS)) {
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// we're called from a different process, do the real check
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if (!checkCallingPermission(
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String16("android.permission.ACCESS_SURFACE_FLINGER")))
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{
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LOGE("Permission Denial: "
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"can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
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return PERMISSION_DENIED;
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}
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}
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switch(code) {
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case CREATE_SURFACE: {
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CHECK_INTERFACE(ISurfaceFlingerClient, data, reply);
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surface_data_t params;
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int32_t pid = data.readInt32();
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DisplayID display = data.readInt32();
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uint32_t w = data.readInt32();
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uint32_t h = data.readInt32();
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PixelFormat format = data.readInt32();
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uint32_t flags = data.readInt32();
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sp<ISurface> s = createSurface(¶ms, pid, display, w, h, format, flags);
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params.writeToParcel(reply);
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reply->writeStrongBinder(s->asBinder());
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return NO_ERROR;
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} break;
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case DESTROY_SURFACE: {
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CHECK_INTERFACE(ISurfaceFlingerClient, data, reply);
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reply->writeInt32( destroySurface( data.readInt32() ) );
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return NO_ERROR;
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} break;
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case SET_STATE: {
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CHECK_INTERFACE(ISurfaceFlingerClient, data, reply);
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int32_t count = data.readInt32();
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layer_state_t* states = new layer_state_t[count];
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for (int i=0 ; i<count ; i++)
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states[i].read(data);
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status_t err = setState(count, states);
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delete [] states;
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reply->writeInt32(err);
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return NO_ERROR;
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} break;
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default:
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return BBinder::onTransact(code, data, reply, flags);
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}
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}
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// ----------------------------------------------------------------------
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status_t ISurfaceFlingerClient::surface_data_t::readFromParcel(const Parcel& parcel)
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{
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token = parcel.readInt32();
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identity = parcel.readInt32();
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heap[0] = interface_cast<IMemoryHeap>(parcel.readStrongBinder());
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heap[1] = interface_cast<IMemoryHeap>(parcel.readStrongBinder());
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return NO_ERROR;
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}
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status_t ISurfaceFlingerClient::surface_data_t::writeToParcel(Parcel* parcel) const
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{
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parcel->writeInt32(token);
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parcel->writeInt32(identity);
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parcel->writeStrongBinder(heap[0]!=0 ? heap[0]->asBinder() : NULL);
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parcel->writeStrongBinder(heap[1]!=0 ? heap[1]->asBinder() : NULL);
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return NO_ERROR;
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}
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}; // namespace android
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