ISurfaceComposer.cpp revision 92efd84f37ce5a8aae74dc9086f825a67b6894e9 
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(DisplayID dpy,
106            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.writeInt32(dpy);
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 void blank()
183    {
184        Parcel data, reply;
185        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
186        remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
187    }
188
189    virtual void unblank()
190    {
191        Parcel data, reply;
192        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
193        remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
194    }
195
196    virtual status_t getDisplayInfo(DisplayID dpy, DisplayInfo* info)
197    {
198        Parcel data, reply;
199        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
200        data.writeInt32(dpy);
201        remote()->transact(BnSurfaceComposer::GET_DISPLAY_INFO, data, &reply);
202        memcpy(info, reply.readInplace(sizeof(DisplayInfo)), sizeof(DisplayInfo));
203        return reply.readInt32();
204    }
205
206
207    virtual void connectDisplay(const sp<ISurfaceTexture> display) {
208        Parcel data, reply;
209        data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
210        data.writeStrongBinder(display->asBinder());
211        remote()->transact(BnSurfaceComposer::CONNECT_DISPLAY, data, &reply);
212    }
213};
214
215IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
216
217// ----------------------------------------------------------------------
218
219status_t BnSurfaceComposer::onTransact(
220    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
221{
222    switch(code) {
223        case CREATE_CONNECTION: {
224            CHECK_INTERFACE(ISurfaceComposer, data, reply);
225            sp<IBinder> b = createConnection()->asBinder();
226            reply->writeStrongBinder(b);
227        } break;
228        case CREATE_GRAPHIC_BUFFER_ALLOC: {
229            CHECK_INTERFACE(ISurfaceComposer, data, reply);
230            sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
231            reply->writeStrongBinder(b);
232        } break;
233        case SET_TRANSACTION_STATE: {
234            CHECK_INTERFACE(ISurfaceComposer, data, reply);
235            size_t count = data.readInt32();
236            ComposerState s;
237            Vector<ComposerState> state;
238            state.setCapacity(count);
239            for (size_t i=0 ; i<count ; i++) {
240                s.read(data);
241                state.add(s);
242            }
243            count = data.readInt32();
244            DisplayState d;
245            Vector<DisplayState> displays;
246            displays.setCapacity(count);
247            for (size_t i=0 ; i<count ; i++) {
248                d.read(data);
249                displays.add(d);
250            }
251            uint32_t flags = data.readInt32();
252            setTransactionState(state, displays, flags);
253        } break;
254        case BOOT_FINISHED: {
255            CHECK_INTERFACE(ISurfaceComposer, data, reply);
256            bootFinished();
257        } break;
258        case CAPTURE_SCREEN: {
259            CHECK_INTERFACE(ISurfaceComposer, data, reply);
260            DisplayID dpy = data.readInt32();
261            uint32_t reqWidth = data.readInt32();
262            uint32_t reqHeight = data.readInt32();
263            uint32_t minLayerZ = data.readInt32();
264            uint32_t maxLayerZ = data.readInt32();
265            sp<IMemoryHeap> heap;
266            uint32_t w, h;
267            PixelFormat f;
268            status_t res = captureScreen(dpy, &heap, &w, &h, &f,
269                    reqWidth, reqHeight, minLayerZ, maxLayerZ);
270            reply->writeStrongBinder(heap->asBinder());
271            reply->writeInt32(w);
272            reply->writeInt32(h);
273            reply->writeInt32(f);
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        case BLANK: {
290            CHECK_INTERFACE(ISurfaceComposer, data, reply);
291            blank();
292        } break;
293        case UNBLANK: {
294            CHECK_INTERFACE(ISurfaceComposer, data, reply);
295            unblank();
296        } break;
297        case GET_DISPLAY_INFO: {
298            CHECK_INTERFACE(ISurfaceComposer, data, reply);
299            DisplayInfo info;
300            DisplayID dpy = data.readInt32();
301            status_t result = getDisplayInfo(dpy, &info);
302            memcpy(reply->writeInplace(sizeof(DisplayInfo)), &info, sizeof(DisplayInfo));
303            reply->writeInt32(result);
304        } break;
305        case CONNECT_DISPLAY: {
306            CHECK_INTERFACE(ISurfaceComposer, data, reply);
307            sp<ISurfaceTexture> surfaceTexture =
308                    interface_cast<ISurfaceTexture>(data.readStrongBinder());
309            connectDisplay(surfaceTexture);
310        } break;
311        default:
312            return BBinder::onTransact(code, data, reply, flags);
313    }
314    return NO_ERROR;
315}
316
317// ----------------------------------------------------------------------------
318
319};
320