ISurfaceComposer.cpp revision 9d4e3d2f42e93e2d12bacabe97d307d30c3c20dd 
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 <gui/BitTube.h>
29#include <gui/IDisplayEventConnection.h>
30#include <gui/ISurfaceComposer.h>
31#include <gui/ISurfaceTexture.h>
32
33#include <private/gui/LayerState.h>
34
35#include <ui/DisplayInfo.h>
36
37#include <utils/Log.h>
38
39// ---------------------------------------------------------------------------
40
41namespace android {
42
43class IDisplayEventConnection;
44
45class BpSurfaceComposer : public BpInterface<ISurfaceComposer>
46{
47public:
48    BpSurfaceComposer(const sp<IBinder>& impl)
49        : BpInterface<ISurfaceComposer>(impl)
50    {
51    }
52
53    virtual sp<ISurfaceComposerClient> createConnection()
54    {
55        uint32_t n;
56        Parcel data, reply;
57        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
58        remote()->transact(BnSurfaceComposer::CREATE_CONNECTION, data, &reply);
59        return interface_cast<ISurfaceComposerClient>(reply.readStrongBinder());
60    }
61
62    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc()
63    {
64        uint32_t n;
65        Parcel data, reply;
66        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
67        remote()->transact(BnSurfaceComposer::CREATE_GRAPHIC_BUFFER_ALLOC, data, &reply);
68        return interface_cast<IGraphicBufferAlloc>(reply.readStrongBinder());
69    }
70
71    virtual void setTransactionState(
72            const Vector<ComposerState>& state,
73            const Vector<DisplayState>& displays,
74            uint32_t flags)
75    {
76        Parcel data, reply;
77        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
78        {
79            Vector<ComposerState>::const_iterator b(state.begin());
80            Vector<ComposerState>::const_iterator e(state.end());
81            data.writeInt32(state.size());
82            for ( ; b != e ; ++b ) {
83                b->write(data);
84            }
85        }
86        {
87            Vector<DisplayState>::const_iterator b(displays.begin());
88            Vector<DisplayState>::const_iterator e(displays.end());
89            data.writeInt32(displays.size());
90            for ( ; b != e ; ++b ) {
91                b->write(data);
92            }
93        }
94        data.writeInt32(flags);
95        remote()->transact(BnSurfaceComposer::SET_TRANSACTION_STATE, data, &reply);
96    }
97
98    virtual void bootFinished()
99    {
100        Parcel data, reply;
101        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
102        remote()->transact(BnSurfaceComposer::BOOT_FINISHED, data, &reply);
103    }
104
105    virtual status_t captureScreen(
106            const sp<IBinder>& display, sp<IMemoryHeap>* heap,
107            uint32_t* width, uint32_t* height, PixelFormat* format,
108            uint32_t reqWidth, uint32_t reqHeight,
109            uint32_t minLayerZ, uint32_t maxLayerZ)
110    {
111        Parcel data, reply;
112        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
113        data.writeStrongBinder(display);
114        data.writeInt32(reqWidth);
115        data.writeInt32(reqHeight);
116        data.writeInt32(minLayerZ);
117        data.writeInt32(maxLayerZ);
118        remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
119        *heap = interface_cast<IMemoryHeap>(reply.readStrongBinder());
120        *width = reply.readInt32();
121        *height = reply.readInt32();
122        *format = reply.readInt32();
123        return reply.readInt32();
124    }
125
126    virtual bool authenticateSurfaceTexture(
127            const sp<ISurfaceTexture>& surfaceTexture) const
128    {
129        Parcel data, reply;
130        int err = NO_ERROR;
131        err = data.writeInterfaceToken(
132                ISurfaceComposer::getInterfaceDescriptor());
133        if (err != NO_ERROR) {
134            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
135                    "interface descriptor: %s (%d)", strerror(-err), -err);
136            return false;
137        }
138        err = data.writeStrongBinder(surfaceTexture->asBinder());
139        if (err != NO_ERROR) {
140            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
141                    "strong binder to parcel: %s (%d)", strerror(-err), -err);
142            return false;
143        }
144        err = remote()->transact(BnSurfaceComposer::AUTHENTICATE_SURFACE, data,
145                &reply);
146        if (err != NO_ERROR) {
147            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
148                    "performing transaction: %s (%d)", strerror(-err), -err);
149            return false;
150        }
151        int32_t result = 0;
152        err = reply.readInt32(&result);
153        if (err != NO_ERROR) {
154            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
155                    "retrieving result: %s (%d)", strerror(-err), -err);
156            return false;
157        }
158        return result != 0;
159    }
160
161    virtual sp<IDisplayEventConnection> createDisplayEventConnection()
162    {
163        Parcel data, reply;
164        sp<IDisplayEventConnection> result;
165        int err = data.writeInterfaceToken(
166                ISurfaceComposer::getInterfaceDescriptor());
167        if (err != NO_ERROR) {
168            return result;
169        }
170        err = remote()->transact(
171                BnSurfaceComposer::CREATE_DISPLAY_EVENT_CONNECTION,
172                data, &reply);
173        if (err != NO_ERROR) {
174            ALOGE("ISurfaceComposer::createDisplayEventConnection: error performing "
175                    "transaction: %s (%d)", strerror(-err), -err);
176            return result;
177        }
178        result = interface_cast<IDisplayEventConnection>(reply.readStrongBinder());
179        return result;
180    }
181
182    virtual sp<IBinder> createDisplay()
183    {
184        Parcel data, reply;
185        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
186        remote()->transact(BnSurfaceComposer::CREATE_DISPLAY, data, &reply);
187        return reply.readStrongBinder();
188    }
189
190    virtual sp<IBinder> getBuiltInDisplay(int32_t id)
191    {
192        Parcel data, reply;
193        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
194        data.writeInt32(id);
195        remote()->transact(BnSurfaceComposer::GET_BUILT_IN_DISPLAY, data, &reply);
196        return reply.readStrongBinder();
197    }
198
199    virtual void blank()
200    {
201        Parcel data, reply;
202        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
203        remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
204    }
205
206    virtual void unblank()
207    {
208        Parcel data, reply;
209        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
210        remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
211    }
212
213    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info)
214    {
215        Parcel data, reply;
216        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
217        data.writeStrongBinder(display);
218        remote()->transact(BnSurfaceComposer::GET_DISPLAY_INFO, data, &reply);
219        memcpy(info, reply.readInplace(sizeof(DisplayInfo)), sizeof(DisplayInfo));
220        return reply.readInt32();
221    }
222
223
224    virtual void connectDisplay(const sp<ISurfaceTexture>& display) {
225        Parcel data, reply;
226        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
227        data.writeStrongBinder(display->asBinder());
228        remote()->transact(BnSurfaceComposer::CONNECT_DISPLAY, data, &reply);
229    }
230};
231
232IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
233
234// ----------------------------------------------------------------------
235
236status_t BnSurfaceComposer::onTransact(
237    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
238{
239    switch(code) {
240        case CREATE_CONNECTION: {
241            CHECK_INTERFACE(ISurfaceComposer, data, reply);
242            sp<IBinder> b = createConnection()->asBinder();
243            reply->writeStrongBinder(b);
244        } break;
245        case CREATE_GRAPHIC_BUFFER_ALLOC: {
246            CHECK_INTERFACE(ISurfaceComposer, data, reply);
247            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
248            reply->writeStrongBinder(b);
249        } break;
250        case SET_TRANSACTION_STATE: {
251            CHECK_INTERFACE(ISurfaceComposer, data, reply);
252            size_t count = data.readInt32();
253            ComposerState s;
254            Vector<ComposerState> state;
255            state.setCapacity(count);
256            for (size_t i=0 ; i<count ; i++) {
257                s.read(data);
258                state.add(s);
259            }
260            count = data.readInt32();
261            DisplayState d;
262            Vector<DisplayState> displays;
263            displays.setCapacity(count);
264            for (size_t i=0 ; i<count ; i++) {
265                d.read(data);
266                displays.add(d);
267            }
268            uint32_t flags = data.readInt32();
269            setTransactionState(state, displays, flags);
270        } break;
271        case BOOT_FINISHED: {
272            CHECK_INTERFACE(ISurfaceComposer, data, reply);
273            bootFinished();
274        } break;
275        case CAPTURE_SCREEN: {
276            CHECK_INTERFACE(ISurfaceComposer, data, reply);
277            sp<IBinder> display = data.readStrongBinder();
278            uint32_t reqWidth = data.readInt32();
279            uint32_t reqHeight = data.readInt32();
280            uint32_t minLayerZ = data.readInt32();
281            uint32_t maxLayerZ = data.readInt32();
282            sp<IMemoryHeap> heap;
283            uint32_t w, h;
284            PixelFormat f;
285            status_t res = captureScreen(display, &heap, &w, &h, &f,
286                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
287            reply->writeStrongBinder(heap->asBinder());
288            reply->writeInt32(w);
289            reply->writeInt32(h);
290            reply->writeInt32(f);
291            reply->writeInt32(res);
292        } break;
293        case AUTHENTICATE_SURFACE: {
294            CHECK_INTERFACE(ISurfaceComposer, data, reply);
295            sp<ISurfaceTexture> surfaceTexture =
296                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
297            int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
298            reply->writeInt32(result);
299        } break;
300        case CREATE_DISPLAY_EVENT_CONNECTION: {
301            CHECK_INTERFACE(ISurfaceComposer, data, reply);
302            sp<IDisplayEventConnection> connection(createDisplayEventConnection());
303            reply->writeStrongBinder(connection->asBinder());
304            return NO_ERROR;
305        } break;
306        case CREATE_DISPLAY: {
307            CHECK_INTERFACE(ISurfaceComposer, data, reply);
308            sp<IBinder> display(createDisplay());
309            reply->writeStrongBinder(display);
310            return NO_ERROR;
311        } break;
312        case GET_BUILT_IN_DISPLAY: {
313            CHECK_INTERFACE(ISurfaceComposer, data, reply);
314            int32_t id = data.readInt32();
315            sp<IBinder> display(getBuiltInDisplay(id));
316            reply->writeStrongBinder(display);
317            return NO_ERROR;
318        } break;
319        case BLANK: {
320            CHECK_INTERFACE(ISurfaceComposer, data, reply);
321            blank();
322        } break;
323        case UNBLANK: {
324            CHECK_INTERFACE(ISurfaceComposer, data, reply);
325            unblank();
326        } break;
327        case GET_DISPLAY_INFO: {
328            CHECK_INTERFACE(ISurfaceComposer, data, reply);
329            DisplayInfo info;
330            sp<IBinder> display = data.readStrongBinder();
331            status_t result = getDisplayInfo(display, &info);
332            memcpy(reply->writeInplace(sizeof(DisplayInfo)), &info, sizeof(DisplayInfo));
333            reply->writeInt32(result);
334        } break;
335        case CONNECT_DISPLAY: {
336            CHECK_INTERFACE(ISurfaceComposer, data, reply);
337            sp<ISurfaceTexture> surfaceTexture =
338                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
339            connectDisplay(surfaceTexture);
340        } break;
341        default:
342            return BBinder::onTransact(code, data, reply, flags);
343    }
344    return NO_ERROR;
345}
346
347// ----------------------------------------------------------------------------
348
349};
350