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/*
* 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
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