ISurfaceComposer.cpp revision c01a79d77b829e7de86ef137694e8ad708470ca1 
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)
183    {
184        Parcel data, reply;
185        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
186        data.writeString8(displayName);
187        remote()->transact(BnSurfaceComposer::CREATE_DISPLAY, data, &reply);
188        return reply.readStrongBinder();
189    }
190
191    virtual sp<IBinder> getBuiltInDisplay(int32_t id)
192    {
193        Parcel data, reply;
194        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
195        data.writeInt32(id);
196        remote()->transact(BnSurfaceComposer::GET_BUILT_IN_DISPLAY, data, &reply);
197        return reply.readStrongBinder();
198    }
199
200    virtual void blank(const sp<IBinder>& display)
201    {
202        Parcel data, reply;
203        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
204        data.writeStrongBinder(display);
205        remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
206    }
207
208    virtual void unblank(const sp<IBinder>& display)
209    {
210        Parcel data, reply;
211        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
212        data.writeStrongBinder(display);
213        remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
214    }
215
216    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info)
217    {
218        Parcel data, reply;
219        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
220        data.writeStrongBinder(display);
221        remote()->transact(BnSurfaceComposer::GET_DISPLAY_INFO, data, &reply);
222        memcpy(info, reply.readInplace(sizeof(DisplayInfo)), sizeof(DisplayInfo));
223        return reply.readInt32();
224    }
225
226
227    virtual void connectDisplay(const sp<ISurfaceTexture>& display) {
228        Parcel data, reply;
229        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
230        data.writeStrongBinder(display->asBinder());
231        remote()->transact(BnSurfaceComposer::CONNECT_DISPLAY, data, &reply);
232    }
233};
234
235IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
236
237// ----------------------------------------------------------------------
238
239status_t BnSurfaceComposer::onTransact(
240    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
241{
242    switch(code) {
243        case CREATE_CONNECTION: {
244            CHECK_INTERFACE(ISurfaceComposer, data, reply);
245            sp<IBinder> b = createConnection()->asBinder();
246            reply->writeStrongBinder(b);
247        } break;
248        case CREATE_GRAPHIC_BUFFER_ALLOC: {
249            CHECK_INTERFACE(ISurfaceComposer, data, reply);
250            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
251            reply->writeStrongBinder(b);
252        } break;
253        case SET_TRANSACTION_STATE: {
254            CHECK_INTERFACE(ISurfaceComposer, data, reply);
255            size_t count = data.readInt32();
256            ComposerState s;
257            Vector<ComposerState> state;
258            state.setCapacity(count);
259            for (size_t i=0 ; i<count ; i++) {
260                s.read(data);
261                state.add(s);
262            }
263            count = data.readInt32();
264            DisplayState d;
265            Vector<DisplayState> displays;
266            displays.setCapacity(count);
267            for (size_t i=0 ; i<count ; i++) {
268                d.read(data);
269                displays.add(d);
270            }
271            uint32_t flags = data.readInt32();
272            setTransactionState(state, displays, flags);
273        } break;
274        case BOOT_FINISHED: {
275            CHECK_INTERFACE(ISurfaceComposer, data, reply);
276            bootFinished();
277        } break;
278        case CAPTURE_SCREEN: {
279            CHECK_INTERFACE(ISurfaceComposer, data, reply);
280            sp<IBinder> display = data.readStrongBinder();
281            uint32_t reqWidth = data.readInt32();
282            uint32_t reqHeight = data.readInt32();
283            uint32_t minLayerZ = data.readInt32();
284            uint32_t maxLayerZ = data.readInt32();
285            sp<IMemoryHeap> heap;
286            uint32_t w, h;
287            PixelFormat f;
288            status_t res = captureScreen(display, &heap, &w, &h, &f,
289                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
290            reply->writeStrongBinder(heap->asBinder());
291            reply->writeInt32(w);
292            reply->writeInt32(h);
293            reply->writeInt32(f);
294            reply->writeInt32(res);
295        } break;
296        case AUTHENTICATE_SURFACE: {
297            CHECK_INTERFACE(ISurfaceComposer, data, reply);
298            sp<ISurfaceTexture> surfaceTexture =
299                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
300            int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
301            reply->writeInt32(result);
302        } break;
303        case CREATE_DISPLAY_EVENT_CONNECTION: {
304            CHECK_INTERFACE(ISurfaceComposer, data, reply);
305            sp<IDisplayEventConnection> connection(createDisplayEventConnection());
306            reply->writeStrongBinder(connection->asBinder());
307            return NO_ERROR;
308        } break;
309        case CREATE_DISPLAY: {
310            CHECK_INTERFACE(ISurfaceComposer, data, reply);
311            String8 displayName = data.readString8();
312            sp<IBinder> display(createDisplay(displayName));
313            reply->writeStrongBinder(display);
314            return NO_ERROR;
315        } break;
316        case GET_BUILT_IN_DISPLAY: {
317            CHECK_INTERFACE(ISurfaceComposer, data, reply);
318            int32_t id = data.readInt32();
319            sp<IBinder> display(getBuiltInDisplay(id));
320            reply->writeStrongBinder(display);
321            return NO_ERROR;
322        } break;
323        case BLANK: {
324            CHECK_INTERFACE(ISurfaceComposer, data, reply);
325            sp<IBinder> display = data.readStrongBinder();
326            blank(display);
327        } break;
328        case UNBLANK: {
329            CHECK_INTERFACE(ISurfaceComposer, data, reply);
330            sp<IBinder> display = data.readStrongBinder();
331            unblank(display);
332        } break;
333        case GET_DISPLAY_INFO: {
334            CHECK_INTERFACE(ISurfaceComposer, data, reply);
335            DisplayInfo info;
336            sp<IBinder> display = data.readStrongBinder();
337            status_t result = getDisplayInfo(display, &info);
338            memcpy(reply->writeInplace(sizeof(DisplayInfo)), &info, sizeof(DisplayInfo));
339            reply->writeInt32(result);
340        } break;
341        case CONNECT_DISPLAY: {
342            CHECK_INTERFACE(ISurfaceComposer, data, reply);
343            sp<ISurfaceTexture> surfaceTexture =
344                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
345            connectDisplay(surfaceTexture);
346        } break;
347        default:
348            return BBinder::onTransact(code, data, reply, flags);
349    }
350    return NO_ERROR;
351}
352
353// ----------------------------------------------------------------------------
354
355};
356