ISurfaceComposer.cpp revision dd3cb84cfbe8068790c6233b5829fae9c4a0ee93 
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(const String8& displayName, bool secure)
183    {
184        Parcel data, reply;
185        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
186        data.writeString8(displayName);
187        data.writeInt32(secure ? 1 : 0);
188        remote()->transact(BnSurfaceComposer::CREATE_DISPLAY, data, &reply);
189        return reply.readStrongBinder();
190    }
191
192    virtual sp<IBinder> getBuiltInDisplay(int32_t id)
193    {
194        Parcel data, reply;
195        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
196        data.writeInt32(id);
197        remote()->transact(BnSurfaceComposer::GET_BUILT_IN_DISPLAY, data, &reply);
198        return reply.readStrongBinder();
199    }
200
201    virtual void blank(const sp<IBinder>& display)
202    {
203        Parcel data, reply;
204        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
205        data.writeStrongBinder(display);
206        remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
207    }
208
209    virtual void unblank(const sp<IBinder>& display)
210    {
211        Parcel data, reply;
212        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
213        data.writeStrongBinder(display);
214        remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
215    }
216
217    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info)
218    {
219        Parcel data, reply;
220        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
221        data.writeStrongBinder(display);
222        remote()->transact(BnSurfaceComposer::GET_DISPLAY_INFO, data, &reply);
223        memcpy(info, reply.readInplace(sizeof(DisplayInfo)), sizeof(DisplayInfo));
224        return reply.readInt32();
225    }
226};
227
228IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
229
230// ----------------------------------------------------------------------
231
232status_t BnSurfaceComposer::onTransact(
233    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
234{
235    switch(code) {
236        case CREATE_CONNECTION: {
237            CHECK_INTERFACE(ISurfaceComposer, data, reply);
238            sp<IBinder> b = createConnection()->asBinder();
239            reply->writeStrongBinder(b);
240        } break;
241        case CREATE_GRAPHIC_BUFFER_ALLOC: {
242            CHECK_INTERFACE(ISurfaceComposer, data, reply);
243            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
244            reply->writeStrongBinder(b);
245        } break;
246        case SET_TRANSACTION_STATE: {
247            CHECK_INTERFACE(ISurfaceComposer, data, reply);
248            size_t count = data.readInt32();
249            ComposerState s;
250            Vector<ComposerState> state;
251            state.setCapacity(count);
252            for (size_t i=0 ; i<count ; i++) {
253                s.read(data);
254                state.add(s);
255            }
256            count = data.readInt32();
257            DisplayState d;
258            Vector<DisplayState> displays;
259            displays.setCapacity(count);
260            for (size_t i=0 ; i<count ; i++) {
261                d.read(data);
262                displays.add(d);
263            }
264            uint32_t flags = data.readInt32();
265            setTransactionState(state, displays, flags);
266        } break;
267        case BOOT_FINISHED: {
268            CHECK_INTERFACE(ISurfaceComposer, data, reply);
269            bootFinished();
270        } break;
271        case CAPTURE_SCREEN: {
272            CHECK_INTERFACE(ISurfaceComposer, data, reply);
273            sp<IBinder> display = data.readStrongBinder();
274            uint32_t reqWidth = data.readInt32();
275            uint32_t reqHeight = data.readInt32();
276            uint32_t minLayerZ = data.readInt32();
277            uint32_t maxLayerZ = data.readInt32();
278            sp<IMemoryHeap> heap;
279            uint32_t w, h;
280            PixelFormat f;
281            status_t res = captureScreen(display, &heap, &w, &h, &f,
282                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
283            reply->writeStrongBinder(heap->asBinder());
284            reply->writeInt32(w);
285            reply->writeInt32(h);
286            reply->writeInt32(f);
287            reply->writeInt32(res);
288        } break;
289        case AUTHENTICATE_SURFACE: {
290            CHECK_INTERFACE(ISurfaceComposer, data, reply);
291            sp<ISurfaceTexture> surfaceTexture =
292                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
293            int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
294            reply->writeInt32(result);
295        } break;
296        case CREATE_DISPLAY_EVENT_CONNECTION: {
297            CHECK_INTERFACE(ISurfaceComposer, data, reply);
298            sp<IDisplayEventConnection> connection(createDisplayEventConnection());
299            reply->writeStrongBinder(connection->asBinder());
300            return NO_ERROR;
301        } break;
302        case CREATE_DISPLAY: {
303            CHECK_INTERFACE(ISurfaceComposer, data, reply);
304            String8 displayName = data.readString8();
305            bool secure = bool(data.readInt32());
306            sp<IBinder> display(createDisplay(displayName, secure));
307            reply->writeStrongBinder(display);
308            return NO_ERROR;
309        } break;
310        case GET_BUILT_IN_DISPLAY: {
311            CHECK_INTERFACE(ISurfaceComposer, data, reply);
312            int32_t id = data.readInt32();
313            sp<IBinder> display(getBuiltInDisplay(id));
314            reply->writeStrongBinder(display);
315            return NO_ERROR;
316        } break;
317        case BLANK: {
318            CHECK_INTERFACE(ISurfaceComposer, data, reply);
319            sp<IBinder> display = data.readStrongBinder();
320            blank(display);
321        } break;
322        case UNBLANK: {
323            CHECK_INTERFACE(ISurfaceComposer, data, reply);
324            sp<IBinder> display = data.readStrongBinder();
325            unblank(display);
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        default:
336            return BBinder::onTransact(code, data, reply, flags);
337    }
338    return NO_ERROR;
339}
340
341// ----------------------------------------------------------------------------
342
343};
344