screencap.cpp revision 88a5df93668cb2079d10fd55de25a333f5f43842 
1/*
2 * Copyright (C) 2010 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#include <unistd.h>
18#include <fcntl.h>
19
20#include <utils/Log.h>
21
22#include <binder/IPCThreadState.h>
23#include <binder/ProcessState.h>
24#include <binder/IServiceManager.h>
25
26#include <binder/IMemory.h>
27#include <surfaceflinger/ISurfaceComposer.h>
28
29using namespace android;
30
31int main(int argc, char** argv)
32{
33    const String16 name("SurfaceFlinger");
34    sp<ISurfaceComposer> composer;
35    if (getService(name, &composer) != NO_ERROR)
36        return 0;
37
38    sp<IMemoryHeap> heap;
39    uint32_t w, h;
40    PixelFormat f;
41    status_t err = composer->captureScreen(0, &heap, &w, &h, &f);
42    if (err != NO_ERROR)
43        return 0;
44
45    uint8_t* base = (uint8_t*)heap->getBase();
46    int fd = dup(STDOUT_FILENO);
47    write(fd, &w, 4);
48    write(fd, &h, 4);
49    write(fd, &f, 4);
50    write(fd, base, w*h*4);
51    close(fd);
52    return 0;
53}
54