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