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 <errno.h> 18#include <unistd.h> 19#include <stdio.h> 20#include <fcntl.h> 21#include <stdlib.h> 22#include <string.h> 23 24#include <linux/fb.h> 25#include <sys/ioctl.h> 26#include <sys/mman.h> 27 28#include <binder/ProcessState.h> 29 30#include <gui/SurfaceComposerClient.h> 31#include <gui/ISurfaceComposer.h> 32 33#include <ui/DisplayInfo.h> 34#include <ui/PixelFormat.h> 35 36// TODO: Fix Skia. 37#pragma GCC diagnostic push 38#pragma GCC diagnostic ignored "-Wunused-parameter" 39#include <SkImageEncoder.h> 40#include <SkData.h> 41#pragma GCC diagnostic pop 42 43using namespace android; 44 45static uint32_t DEFAULT_DISPLAY_ID = ISurfaceComposer::eDisplayIdMain; 46 47static void usage(const char* pname) 48{ 49 fprintf(stderr, 50 "usage: %s [-hp] [-d display-id] [FILENAME]\n" 51 " -h: this message\n" 52 " -p: save the file as a png.\n" 53 " -d: specify the display id to capture, default %d.\n" 54 "If FILENAME ends with .png it will be saved as a png.\n" 55 "If FILENAME is not given, the results will be printed to stdout.\n", 56 pname, DEFAULT_DISPLAY_ID 57 ); 58} 59 60static SkColorType flinger2skia(PixelFormat f) 61{ 62 switch (f) { 63 case PIXEL_FORMAT_RGB_565: 64 return kRGB_565_SkColorType; 65 default: 66 return kN32_SkColorType; 67 } 68} 69 70static status_t notifyMediaScanner(const char* fileName) { 71 String8 cmd("am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE -d file://"); 72 String8 fileUrl("\""); 73 fileUrl.append(fileName); 74 fileUrl.append("\""); 75 cmd.append(fileName); 76 cmd.append(" > /dev/null"); 77 int result = system(cmd.string()); 78 if (result < 0) { 79 fprintf(stderr, "Unable to broadcast intent for media scanner.\n"); 80 return UNKNOWN_ERROR; 81 } 82 return NO_ERROR; 83} 84 85int main(int argc, char** argv) 86{ 87 ProcessState::self()->startThreadPool(); 88 89 const char* pname = argv[0]; 90 bool png = false; 91 int32_t displayId = DEFAULT_DISPLAY_ID; 92 int c; 93 while ((c = getopt(argc, argv, "phd:")) != -1) { 94 switch (c) { 95 case 'p': 96 png = true; 97 break; 98 case 'd': 99 displayId = atoi(optarg); 100 break; 101 case '?': 102 case 'h': 103 usage(pname); 104 return 1; 105 } 106 } 107 argc -= optind; 108 argv += optind; 109 110 int fd = -1; 111 const char* fn = NULL; 112 if (argc == 0) { 113 fd = dup(STDOUT_FILENO); 114 } else if (argc == 1) { 115 fn = argv[0]; 116 fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0664); 117 if (fd == -1) { 118 fprintf(stderr, "Error opening file: %s (%s)\n", fn, strerror(errno)); 119 return 1; 120 } 121 const int len = strlen(fn); 122 if (len >= 4 && 0 == strcmp(fn+len-4, ".png")) { 123 png = true; 124 } 125 } 126 127 if (fd == -1) { 128 usage(pname); 129 return 1; 130 } 131 132 void const* mapbase = MAP_FAILED; 133 ssize_t mapsize = -1; 134 135 void const* base = NULL; 136 uint32_t w, s, h, f; 137 size_t size = 0; 138 139 // Maps orientations from DisplayInfo to ISurfaceComposer 140 static const uint32_t ORIENTATION_MAP[] = { 141 ISurfaceComposer::eRotateNone, // 0 == DISPLAY_ORIENTATION_0 142 ISurfaceComposer::eRotate270, // 1 == DISPLAY_ORIENTATION_90 143 ISurfaceComposer::eRotate180, // 2 == DISPLAY_ORIENTATION_180 144 ISurfaceComposer::eRotate90, // 3 == DISPLAY_ORIENTATION_270 145 }; 146 147 ScreenshotClient screenshot; 148 sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(displayId); 149 if (display == NULL) { 150 fprintf(stderr, "Unable to get handle for display %d\n", displayId); 151 return 1; 152 } 153 154 Vector<DisplayInfo> configs; 155 SurfaceComposerClient::getDisplayConfigs(display, &configs); 156 int activeConfig = SurfaceComposerClient::getActiveConfig(display); 157 if (static_cast<size_t>(activeConfig) >= configs.size()) { 158 fprintf(stderr, "Active config %d not inside configs (size %zu)\n", 159 activeConfig, configs.size()); 160 return 1; 161 } 162 uint8_t displayOrientation = configs[activeConfig].orientation; 163 uint32_t captureOrientation = ORIENTATION_MAP[displayOrientation]; 164 165 status_t result = screenshot.update(display, Rect(), 0, 0, 0, -1U, 166 false, captureOrientation); 167 if (result == NO_ERROR) { 168 base = screenshot.getPixels(); 169 w = screenshot.getWidth(); 170 h = screenshot.getHeight(); 171 s = screenshot.getStride(); 172 f = screenshot.getFormat(); 173 size = screenshot.getSize(); 174 } 175 176 if (base != NULL) { 177 if (png) { 178 const SkImageInfo info = SkImageInfo::Make(w, h, flinger2skia(f), 179 kPremul_SkAlphaType); 180 SkAutoTUnref<SkData> data(SkImageEncoder::EncodeData(info, base, s*bytesPerPixel(f), 181 SkImageEncoder::kPNG_Type, SkImageEncoder::kDefaultQuality)); 182 if (data.get()) { 183 write(fd, data->data(), data->size()); 184 } 185 if (fn != NULL) { 186 notifyMediaScanner(fn); 187 } 188 } else { 189 write(fd, &w, 4); 190 write(fd, &h, 4); 191 write(fd, &f, 4); 192 size_t Bpp = bytesPerPixel(f); 193 for (size_t y=0 ; y<h ; y++) { 194 write(fd, base, w*Bpp); 195 base = (void *)((char *)base + s*Bpp); 196 } 197 } 198 } 199 close(fd); 200 if (mapbase != MAP_FAILED) { 201 munmap((void *)mapbase, mapsize); 202 } 203 return 0; 204} 205