ISurfaceComposer.cpp revision 461afeb9fde149f9455acbadf1257d08d33e8eb3 
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 <stdint.h>
21#include <sys/types.h>
22
23#include <binder/Parcel.h>
24#include <binder/IMemory.h>
25#include <binder/IPCThreadState.h>
26#include <binder/IServiceManager.h>
27
28#include <private/surfaceflinger/LayerState.h>
29
30#include <surfaceflinger/ISurfaceComposer.h>
31
32#include <gui/BitTube.h>
33#include <gui/IDisplayEventConnection.h>
34
35#include <ui/DisplayInfo.h>
36
37#include <gui/ISurfaceTexture.h>
38
39#include <utils/Log.h>
40
41// ---------------------------------------------------------------------------
42
43#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
44#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
45
46// ---------------------------------------------------------------------------
47
48namespace android {
49
50class IDisplayEventConnection;
51
52class BpSurfaceComposer : public BpInterface<ISurfaceComposer>
53{
54public:
55    BpSurfaceComposer(const sp<IBinder>& impl)
56        : BpInterface<ISurfaceComposer>(impl)
57    {
58    }
59
60    virtual sp<ISurfaceComposerClient> createConnection()
61    {
62        uint32_t n;
63        Parcel data, reply;
64        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
65        remote()->transact(BnSurfaceComposer::CREATE_CONNECTION, data, &reply);
66        return interface_cast<ISurfaceComposerClient>(reply.readStrongBinder());
67    }
68
69    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc()
70    {
71        uint32_t n;
72        Parcel data, reply;
73        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
74        remote()->transact(BnSurfaceComposer::CREATE_GRAPHIC_BUFFER_ALLOC, data, &reply);
75        return interface_cast<IGraphicBufferAlloc>(reply.readStrongBinder());
76    }
77
78    virtual sp<IMemoryHeap> getCblk() const
79    {
80        Parcel data, reply;
81        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
82        remote()->transact(BnSurfaceComposer::GET_CBLK, data, &reply);
83        return interface_cast<IMemoryHeap>(reply.readStrongBinder());
84    }
85
86    virtual void setTransactionState(const Vector<ComposerState>& state,
87            int orientation, uint32_t flags)
88    {
89        Parcel data, reply;
90        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
91        Vector<ComposerState>::const_iterator b(state.begin());
92        Vector<ComposerState>::const_iterator e(state.end());
93        data.writeInt32(state.size());
94        for ( ; b != e ; ++b ) {
95            b->write(data);
96        }
97        data.writeInt32(orientation);
98        data.writeInt32(flags);
99        remote()->transact(BnSurfaceComposer::SET_TRANSACTION_STATE, data, &reply);
100    }
101
102    virtual void bootFinished()
103    {
104        Parcel data, reply;
105        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
106        remote()->transact(BnSurfaceComposer::BOOT_FINISHED, data, &reply);
107    }
108
109    virtual status_t captureScreen(DisplayID dpy,
110            sp<IMemoryHeap>* heap,
111            uint32_t* width, uint32_t* height, PixelFormat* format,
112            uint32_t reqWidth, uint32_t reqHeight,
113            uint32_t minLayerZ, uint32_t maxLayerZ)
114    {
115        Parcel data, reply;
116        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
117        data.writeInt32(dpy);
118        data.writeInt32(reqWidth);
119        data.writeInt32(reqHeight);
120        data.writeInt32(minLayerZ);
121        data.writeInt32(maxLayerZ);
122        remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
123        *heap = interface_cast<IMemoryHeap>(reply.readStrongBinder());
124        *width = reply.readInt32();
125        *height = reply.readInt32();
126        *format = reply.readInt32();
127        return reply.readInt32();
128    }
129
130    virtual status_t turnElectronBeamOff(int32_t mode)
131    {
132        Parcel data, reply;
133        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
134        data.writeInt32(mode);
135        remote()->transact(BnSurfaceComposer::TURN_ELECTRON_BEAM_OFF, data, &reply);
136        return reply.readInt32();
137    }
138
139    virtual status_t turnElectronBeamOn(int32_t mode)
140    {
141        Parcel data, reply;
142        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
143        data.writeInt32(mode);
144        remote()->transact(BnSurfaceComposer::TURN_ELECTRON_BEAM_ON, data, &reply);
145        return reply.readInt32();
146    }
147
148    virtual bool authenticateSurfaceTexture(
149            const sp<ISurfaceTexture>& surfaceTexture) const
150    {
151        Parcel data, reply;
152        int err = NO_ERROR;
153        err = data.writeInterfaceToken(
154                ISurfaceComposer::getInterfaceDescriptor());
155        if (err != NO_ERROR) {
156            LOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
157                    "interface descriptor: %s (%d)", strerror(-err), -err);
158            return false;
159        }
160        err = data.writeStrongBinder(surfaceTexture->asBinder());
161        if (err != NO_ERROR) {
162            LOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
163                    "strong binder to parcel: %s (%d)", strerror(-err), -err);
164            return false;
165        }
166        err = remote()->transact(BnSurfaceComposer::AUTHENTICATE_SURFACE, data,
167                &reply);
168        if (err != NO_ERROR) {
169            LOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
170                    "performing transaction: %s (%d)", strerror(-err), -err);
171            return false;
172        }
173        int32_t result = 0;
174        err = reply.readInt32(&result);
175        if (err != NO_ERROR) {
176            LOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
177                    "retrieving result: %s (%d)", strerror(-err), -err);
178            return false;
179        }
180        return result != 0;
181    }
182
183    virtual sp<IDisplayEventConnection> createDisplayEventConnection()
184    {
185        Parcel data, reply;
186        sp<IDisplayEventConnection> result;
187        int err = data.writeInterfaceToken(
188                ISurfaceComposer::getInterfaceDescriptor());
189        if (err != NO_ERROR) {
190            return result;
191        }
192        err = remote()->transact(
193                BnSurfaceComposer::CREATE_DISPLAY_EVENT_CONNECTION,
194                data, &reply);
195        if (err != NO_ERROR) {
196            LOGE("ISurfaceComposer::createDisplayEventConnection: error performing "
197                    "transaction: %s (%d)", strerror(-err), -err);
198            return result;
199        }
200        result = interface_cast<IDisplayEventConnection>(reply.readStrongBinder());
201        return result;
202    }
203};
204
205IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
206
207// ----------------------------------------------------------------------
208
209status_t BnSurfaceComposer::onTransact(
210    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
211{
212    switch(code) {
213        case CREATE_CONNECTION: {
214            CHECK_INTERFACE(ISurfaceComposer, data, reply);
215            sp<IBinder> b = createConnection()->asBinder();
216            reply->writeStrongBinder(b);
217        } break;
218        case CREATE_GRAPHIC_BUFFER_ALLOC: {
219            CHECK_INTERFACE(ISurfaceComposer, data, reply);
220            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
221            reply->writeStrongBinder(b);
222        } break;
223        case SET_TRANSACTION_STATE: {
224            CHECK_INTERFACE(ISurfaceComposer, data, reply);
225            size_t count = data.readInt32();
226            ComposerState s;
227            Vector<ComposerState> state;
228            state.setCapacity(count);
229            for (size_t i=0 ; i<count ; i++) {
230                s.read(data);
231                state.add(s);
232            }
233            int orientation = data.readInt32();
234            uint32_t flags = data.readInt32();
235            setTransactionState(state, orientation, flags);
236        } break;
237        case BOOT_FINISHED: {
238            CHECK_INTERFACE(ISurfaceComposer, data, reply);
239            bootFinished();
240        } break;
241        case GET_CBLK: {
242            CHECK_INTERFACE(ISurfaceComposer, data, reply);
243            sp<IBinder> b = getCblk()->asBinder();
244            reply->writeStrongBinder(b);
245        } break;
246        case CAPTURE_SCREEN: {
247            CHECK_INTERFACE(ISurfaceComposer, data, reply);
248            DisplayID dpy = data.readInt32();
249            uint32_t reqWidth = data.readInt32();
250            uint32_t reqHeight = data.readInt32();
251            uint32_t minLayerZ = data.readInt32();
252            uint32_t maxLayerZ = data.readInt32();
253            sp<IMemoryHeap> heap;
254            uint32_t w, h;
255            PixelFormat f;
256            status_t res = captureScreen(dpy, &heap, &w, &h, &f,
257                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
258            reply->writeStrongBinder(heap->asBinder());
259            reply->writeInt32(w);
260            reply->writeInt32(h);
261            reply->writeInt32(f);
262            reply->writeInt32(res);
263        } break;
264        case TURN_ELECTRON_BEAM_OFF: {
265            CHECK_INTERFACE(ISurfaceComposer, data, reply);
266            int32_t mode = data.readInt32();
267            status_t res = turnElectronBeamOff(mode);
268            reply->writeInt32(res);
269        } break;
270        case TURN_ELECTRON_BEAM_ON: {
271            CHECK_INTERFACE(ISurfaceComposer, data, reply);
272            int32_t mode = data.readInt32();
273            status_t res = turnElectronBeamOn(mode);
274            reply->writeInt32(res);
275        } break;
276        case AUTHENTICATE_SURFACE: {
277            CHECK_INTERFACE(ISurfaceComposer, data, reply);
278            sp<ISurfaceTexture> surfaceTexture =
279                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
280            int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
281            reply->writeInt32(result);
282        } break;
283        case CREATE_DISPLAY_EVENT_CONNECTION: {
284            CHECK_INTERFACE(ISurfaceComposer, data, reply);
285            sp<IDisplayEventConnection> connection(createDisplayEventConnection());
286            reply->writeStrongBinder(connection->asBinder());
287            return NO_ERROR;
288        } break;
289        default:
290            return BBinder::onTransact(code, data, reply, flags);
291    }
292    return NO_ERROR;
293}
294
295// ----------------------------------------------------------------------------
296
297};
298