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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 // tag as surfaceflinger
     18 #define LOG_TAG "SurfaceFlinger"
     19 
     20 #include <stdio.h>
     21 #include <stdint.h>
     22 #include <sys/types.h>
     23 
     24 #include <binder/Parcel.h>
     25 #include <binder/IMemory.h>
     26 #include <binder/IPCThreadState.h>
     27 #include <binder/IServiceManager.h>
     28 
     29 #include <ui/Point.h>
     30 #include <ui/Rect.h>
     31 
     32 #include <surfaceflinger/ISurface.h>
     33 #include <surfaceflinger/ISurfaceComposerClient.h>
     34 #include <private/surfaceflinger/LayerState.h>
     35 
     36 // ---------------------------------------------------------------------------
     37 
     38 /* ideally AID_GRAPHICS would be in a semi-public header
     39  * or there would be a way to map a user/group name to its id
     40  */
     41 #ifndef AID_GRAPHICS
     42 #define AID_GRAPHICS 1003
     43 #endif
     44 
     45 #define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
     46 #define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
     47 
     48 // ---------------------------------------------------------------------------
     49 
     50 namespace android {
     51 
     52 enum {
     53     CREATE_SURFACE = IBinder::FIRST_CALL_TRANSACTION,
     54     DESTROY_SURFACE
     55 };
     56 
     57 class BpSurfaceComposerClient : public BpInterface<ISurfaceComposerClient>
     58 {
     59 public:
     60     BpSurfaceComposerClient(const sp<IBinder>& impl)
     61         : BpInterface<ISurfaceComposerClient>(impl)
     62     {
     63     }
     64 
     65     virtual sp<ISurface> createSurface( surface_data_t* params,
     66                                         const String8& name,
     67                                         DisplayID display,
     68                                         uint32_t w,
     69                                         uint32_t h,
     70                                         PixelFormat format,
     71                                         uint32_t flags)
     72     {
     73         Parcel data, reply;
     74         data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor());
     75         data.writeString8(name);
     76         data.writeInt32(display);
     77         data.writeInt32(w);
     78         data.writeInt32(h);
     79         data.writeInt32(format);
     80         data.writeInt32(flags);
     81         remote()->transact(CREATE_SURFACE, data, &reply);
     82         params->readFromParcel(reply);
     83         return interface_cast<ISurface>(reply.readStrongBinder());
     84     }
     85 
     86     virtual status_t destroySurface(SurfaceID sid)
     87     {
     88         Parcel data, reply;
     89         data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor());
     90         data.writeInt32(sid);
     91         remote()->transact(DESTROY_SURFACE, data, &reply);
     92         return reply.readInt32();
     93     }
     94 };
     95 
     96 IMPLEMENT_META_INTERFACE(SurfaceComposerClient, "android.ui.ISurfaceComposerClient");
     97 
     98 // ----------------------------------------------------------------------
     99 
    100 status_t BnSurfaceComposerClient::onTransact(
    101     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
    102 {
    103      switch(code) {
    104         case CREATE_SURFACE: {
    105             CHECK_INTERFACE(ISurfaceComposerClient, data, reply);
    106             surface_data_t params;
    107             String8 name = data.readString8();
    108             DisplayID display = data.readInt32();
    109             uint32_t w = data.readInt32();
    110             uint32_t h = data.readInt32();
    111             PixelFormat format = data.readInt32();
    112             uint32_t flags = data.readInt32();
    113             sp<ISurface> s = createSurface(&params, name, display, w, h,
    114                     format, flags);
    115             params.writeToParcel(reply);
    116             reply->writeStrongBinder(s->asBinder());
    117             return NO_ERROR;
    118         } break;
    119         case DESTROY_SURFACE: {
    120             CHECK_INTERFACE(ISurfaceComposerClient, data, reply);
    121             reply->writeInt32( destroySurface( data.readInt32() ) );
    122             return NO_ERROR;
    123         } break;
    124         default:
    125             return BBinder::onTransact(code, data, reply, flags);
    126     }
    127 }
    128 
    129 // ----------------------------------------------------------------------
    130 
    131 status_t ISurfaceComposerClient::surface_data_t::readFromParcel(const Parcel& parcel)
    132 {
    133     token    = parcel.readInt32();
    134     identity = parcel.readInt32();
    135     return NO_ERROR;
    136 }
    137 
    138 status_t ISurfaceComposerClient::surface_data_t::writeToParcel(Parcel* parcel) const
    139 {
    140     parcel->writeInt32(token);
    141     parcel->writeInt32(identity);
    142     return NO_ERROR;
    143 }
    144 
    145 }; // namespace android
    146