replicant-frameworks_native/services/surfaceflinger/Client.cpp
Mathias Agopian ac9fa427d4 get rid of Surface identity and token
we use the IBinder instead.

Change-Id: I4aa0b58869ba43f19980013620051e5a261b062d
2013-02-13 15:27:08 -08:00

155 lines
4.5 KiB
C++

/*
* Copyright (C) 2012 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.
*/
#include <stdint.h>
#include <sys/types.h>
#include <binder/PermissionCache.h>
#include <private/android_filesystem_config.h>
#include "Client.h"
#include "Layer.h"
#include "LayerBase.h"
#include "SurfaceFlinger.h"
namespace android {
// ---------------------------------------------------------------------------
const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
// ---------------------------------------------------------------------------
Client::Client(const sp<SurfaceFlinger>& flinger)
: mFlinger(flinger)
{
}
Client::~Client()
{
const size_t count = mLayers.size();
for (size_t i=0 ; i<count ; i++) {
sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
if (layer != 0) {
mFlinger->removeLayer(layer);
}
}
}
status_t Client::initCheck() const {
return NO_ERROR;
}
void Client::attachLayer(const sp<IBinder>& handle, const sp<LayerBaseClient>& layer)
{
Mutex::Autolock _l(mLock);
mLayers.add(handle, layer);
}
void Client::detachLayer(const LayerBaseClient* layer)
{
Mutex::Autolock _l(mLock);
// we do a linear search here, because this doesn't happen often
const size_t count = mLayers.size();
for (size_t i=0 ; i<count ; i++) {
if (mLayers.valueAt(i) == layer) {
mLayers.removeItemsAt(i, 1);
break;
}
}
}
sp<LayerBaseClient> Client::getLayerUser(const sp<IBinder>& handle) const
{
Mutex::Autolock _l(mLock);
sp<LayerBaseClient> lbc;
wp<LayerBaseClient> layer(mLayers.valueFor(handle));
if (layer != 0) {
lbc = layer.promote();
ALOGE_IF(lbc==0, "getLayerUser(name=%p) is dead", handle.get());
}
return lbc;
}
status_t Client::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
// these must be checked
IPCThreadState* ipc = IPCThreadState::self();
const int pid = ipc->getCallingPid();
const int uid = ipc->getCallingUid();
const int self_pid = getpid();
if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
// we're called from a different process, do the real check
if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
{
ALOGE("Permission Denial: "
"can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
return PERMISSION_DENIED;
}
}
return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
}
sp<ISurface> Client::createSurface(
const String8& name,
uint32_t w, uint32_t h, PixelFormat format,
uint32_t flags)
{
/*
* createSurface must be called from the GL thread so that it can
* have access to the GL context.
*/
class MessageCreateLayer : public MessageBase {
sp<ISurface> result;
SurfaceFlinger* flinger;
Client* client;
const String8& name;
uint32_t w, h;
PixelFormat format;
uint32_t flags;
public:
MessageCreateLayer(SurfaceFlinger* flinger,
const String8& name, Client* client,
uint32_t w, uint32_t h, PixelFormat format,
uint32_t flags)
: flinger(flinger), client(client), name(name),
w(w), h(h), format(format), flags(flags)
{
}
sp<ISurface> getResult() const { return result; }
virtual bool handler() {
result = flinger->createLayer(name, client, w, h, format, flags);
return true;
}
};
sp<MessageBase> msg = new MessageCreateLayer(mFlinger.get(),
name, this, w, h, format, flags);
mFlinger->postMessageSync(msg);
return static_cast<MessageCreateLayer*>( msg.get() )->getResult();
}
status_t Client::destroySurface(const sp<IBinder>& handle) {
return mFlinger->onLayerRemoved(this, handle);
}
// ---------------------------------------------------------------------------
}; // namespace android