ISurfaceComposer.cpp revision 8b33f032327f8de0dcc0e6d0d43ed80f834b51f6 
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 sp<IMemoryHeap> getCblk() const
72    {
73        Parcel data, reply;
74        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
75        remote()->transact(BnSurfaceComposer::GET_CBLK, data, &reply);
76        return interface_cast<IMemoryHeap>(reply.readStrongBinder());
77    }
78
79    virtual void setTransactionState(
80            const Vector<ComposerState>& state,
81            const Vector<DisplayState>& displays,
82            uint32_t flags)
83    {
84        Parcel data, reply;
85        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
86        {
87            Vector<ComposerState>::const_iterator b(state.begin());
88            Vector<ComposerState>::const_iterator e(state.end());
89            data.writeInt32(state.size());
90            for ( ; b != e ; ++b ) {
91                b->write(data);
92            }
93        }
94        {
95            Vector<DisplayState>::const_iterator b(displays.begin());
96            Vector<DisplayState>::const_iterator e(displays.end());
97            data.writeInt32(displays.size());
98            for ( ; b != e ; ++b ) {
99                b->write(data);
100            }
101        }
102        data.writeInt32(flags);
103        remote()->transact(BnSurfaceComposer::SET_TRANSACTION_STATE, data, &reply);
104    }
105
106    virtual void bootFinished()
107    {
108        Parcel data, reply;
109        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
110        remote()->transact(BnSurfaceComposer::BOOT_FINISHED, data, &reply);
111    }
112
113    virtual status_t captureScreen(DisplayID dpy,
114            sp<IMemoryHeap>* heap,
115            uint32_t* width, uint32_t* height, PixelFormat* format,
116            uint32_t reqWidth, uint32_t reqHeight,
117            uint32_t minLayerZ, uint32_t maxLayerZ)
118    {
119        Parcel data, reply;
120        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
121        data.writeInt32(dpy);
122        data.writeInt32(reqWidth);
123        data.writeInt32(reqHeight);
124        data.writeInt32(minLayerZ);
125        data.writeInt32(maxLayerZ);
126        remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
127        *heap = interface_cast<IMemoryHeap>(reply.readStrongBinder());
128        *width = reply.readInt32();
129        *height = reply.readInt32();
130        *format = reply.readInt32();
131        return reply.readInt32();
132    }
133
134    virtual status_t turnElectronBeamOff(int32_t mode)
135    {
136        Parcel data, reply;
137        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
138        data.writeInt32(mode);
139        remote()->transact(BnSurfaceComposer::TURN_ELECTRON_BEAM_OFF, data, &reply);
140        return reply.readInt32();
141    }
142
143    virtual status_t turnElectronBeamOn(int32_t mode)
144    {
145        Parcel data, reply;
146        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
147        data.writeInt32(mode);
148        remote()->transact(BnSurfaceComposer::TURN_ELECTRON_BEAM_ON, data, &reply);
149        return reply.readInt32();
150    }
151
152    virtual bool authenticateSurfaceTexture(
153            const sp<ISurfaceTexture>& surfaceTexture) const
154    {
155        Parcel data, reply;
156        int err = NO_ERROR;
157        err = data.writeInterfaceToken(
158                ISurfaceComposer::getInterfaceDescriptor());
159        if (err != NO_ERROR) {
160            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
161                    "interface descriptor: %s (%d)", strerror(-err), -err);
162            return false;
163        }
164        err = data.writeStrongBinder(surfaceTexture->asBinder());
165        if (err != NO_ERROR) {
166            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
167                    "strong binder to parcel: %s (%d)", strerror(-err), -err);
168            return false;
169        }
170        err = remote()->transact(BnSurfaceComposer::AUTHENTICATE_SURFACE, data,
171                &reply);
172        if (err != NO_ERROR) {
173            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
174                    "performing transaction: %s (%d)", strerror(-err), -err);
175            return false;
176        }
177        int32_t result = 0;
178        err = reply.readInt32(&result);
179        if (err != NO_ERROR) {
180            ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
181                    "retrieving result: %s (%d)", strerror(-err), -err);
182            return false;
183        }
184        return result != 0;
185    }
186
187    virtual sp<IDisplayEventConnection> createDisplayEventConnection()
188    {
189        Parcel data, reply;
190        sp<IDisplayEventConnection> result;
191        int err = data.writeInterfaceToken(
192                ISurfaceComposer::getInterfaceDescriptor());
193        if (err != NO_ERROR) {
194            return result;
195        }
196        err = remote()->transact(
197                BnSurfaceComposer::CREATE_DISPLAY_EVENT_CONNECTION,
198                data, &reply);
199        if (err != NO_ERROR) {
200            ALOGE("ISurfaceComposer::createDisplayEventConnection: error performing "
201                    "transaction: %s (%d)", strerror(-err), -err);
202            return result;
203        }
204        result = interface_cast<IDisplayEventConnection>(reply.readStrongBinder());
205        return result;
206    }
207
208    virtual void blank()
209    {
210        Parcel data, reply;
211        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
212        remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
213    }
214
215    virtual void unblank()
216    {
217        Parcel data, reply;
218        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
219        remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
220    }
221
222    virtual void connectDisplay(const sp<ISurfaceTexture> display) {
223        Parcel data, reply;
224        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
225        data.writeStrongBinder(display->asBinder());
226        remote()->transact(BnSurfaceComposer::CONNECT_DISPLAY, data, &reply);
227    }
228};
229
230IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
231
232// ----------------------------------------------------------------------
233
234status_t BnSurfaceComposer::onTransact(
235    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
236{
237    switch(code) {
238        case CREATE_CONNECTION: {
239            CHECK_INTERFACE(ISurfaceComposer, data, reply);
240            sp<IBinder> b = createConnection()->asBinder();
241            reply->writeStrongBinder(b);
242        } break;
243        case CREATE_GRAPHIC_BUFFER_ALLOC: {
244            CHECK_INTERFACE(ISurfaceComposer, data, reply);
245            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
246            reply->writeStrongBinder(b);
247        } break;
248        case SET_TRANSACTION_STATE: {
249            CHECK_INTERFACE(ISurfaceComposer, data, reply);
250            size_t count = data.readInt32();
251            ComposerState s;
252            Vector<ComposerState> state;
253            state.setCapacity(count);
254            for (size_t i=0 ; i<count ; i++) {
255                s.read(data);
256                state.add(s);
257            }
258            count = data.readInt32();
259            DisplayState d;
260            Vector<DisplayState> displays;
261            displays.setCapacity(count);
262            for (size_t i=0 ; i<count ; i++) {
263                d.read(data);
264                displays.add(d);
265            }
266            uint32_t flags = data.readInt32();
267            setTransactionState(state, displays, flags);
268        } break;
269        case BOOT_FINISHED: {
270            CHECK_INTERFACE(ISurfaceComposer, data, reply);
271            bootFinished();
272        } break;
273        case GET_CBLK: {
274            CHECK_INTERFACE(ISurfaceComposer, data, reply);
275            sp<IBinder> b = getCblk()->asBinder();
276            reply->writeStrongBinder(b);
277        } break;
278        case CAPTURE_SCREEN: {
279            CHECK_INTERFACE(ISurfaceComposer, data, reply);
280            DisplayID dpy = data.readInt32();
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(dpy, &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 TURN_ELECTRON_BEAM_OFF: {
297            CHECK_INTERFACE(ISurfaceComposer, data, reply);
298            int32_t mode = data.readInt32();
299            status_t res = turnElectronBeamOff(mode);
300            reply->writeInt32(res);
301        } break;
302        case TURN_ELECTRON_BEAM_ON: {
303            CHECK_INTERFACE(ISurfaceComposer, data, reply);
304            int32_t mode = data.readInt32();
305            status_t res = turnElectronBeamOn(mode);
306            reply->writeInt32(res);
307        } break;
308        case AUTHENTICATE_SURFACE: {
309            CHECK_INTERFACE(ISurfaceComposer, data, reply);
310            sp<ISurfaceTexture> surfaceTexture =
311                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
312            int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
313            reply->writeInt32(result);
314        } break;
315        case CREATE_DISPLAY_EVENT_CONNECTION: {
316            CHECK_INTERFACE(ISurfaceComposer, data, reply);
317            sp<IDisplayEventConnection> connection(createDisplayEventConnection());
318            reply->writeStrongBinder(connection->asBinder());
319            return NO_ERROR;
320        } break;
321        case BLANK: {
322            CHECK_INTERFACE(ISurfaceComposer, data, reply);
323            blank();
324        } break;
325        case UNBLANK: {
326            CHECK_INTERFACE(ISurfaceComposer, data, reply);
327            unblank();
328        } break;
329        case CONNECT_DISPLAY: {
330            CHECK_INTERFACE(ISurfaceComposer, data, reply);
331            sp<ISurfaceTexture> surfaceTexture =
332                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
333            connectDisplay(surfaceTexture);
334        } break;
335        default:
336            return BBinder::onTransact(code, data, reply, flags);
337    }
338    return NO_ERROR;
339}
340
341// ----------------------------------------------------------------------------
342
343};
344