2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
25 #include <sys/ioctl.h>
28 #include <binder/ProcessState.h>
30 #include <gui/SurfaceComposerClient.h>
31 #include <gui/ISurfaceComposer.h>
33 #include <ui/DisplayInfo.h>
34 #include <ui/PixelFormat.h>
36 #include <system/graphics.h>
39 #pragma GCC diagnostic push
40 #pragma GCC diagnostic ignored "-Wunused-parameter"
41 #include <SkImageEncoder.h>
43 #include <SkColorSpace.h>
44 #pragma GCC diagnostic pop
46 using namespace android;
48 static uint32_t DEFAULT_DISPLAY_ID = ISurfaceComposer::eDisplayIdMain;
50 #define COLORSPACE_UNKNOWN 0
51 #define COLORSPACE_SRGB 1
52 #define COLORSPACE_DISPLAY_P3 2
54 static void usage(const char* pname)
57 "usage: %s [-hp] [-d display-id] [FILENAME]\n"
59 " -p: save the file as a png.\n"
60 " -d: specify the display id to capture, default %d.\n"
61 "If FILENAME ends with .png it will be saved as a png.\n"
62 "If FILENAME is not given, the results will be printed to stdout.\n",
63 pname, DEFAULT_DISPLAY_ID
67 static SkColorType flinger2skia(PixelFormat f)
70 case PIXEL_FORMAT_RGB_565:
71 return kRGB_565_SkColorType;
73 return kN32_SkColorType;
77 static sk_sp<SkColorSpace> dataSpaceToColorSpace(android_dataspace d)
80 case HAL_DATASPACE_V0_SRGB:
81 return SkColorSpace::MakeSRGB();
82 case HAL_DATASPACE_DISPLAY_P3:
83 return SkColorSpace::MakeRGB(
84 SkColorSpace::kSRGB_RenderTargetGamma, SkColorSpace::kDCIP3_D65_Gamut);
90 static uint32_t dataSpaceToInt(android_dataspace d)
93 case HAL_DATASPACE_V0_SRGB:
94 return COLORSPACE_SRGB;
95 case HAL_DATASPACE_DISPLAY_P3:
96 return COLORSPACE_DISPLAY_P3;
98 return COLORSPACE_UNKNOWN;
102 static status_t notifyMediaScanner(const char* fileName) {
103 String8 cmd("am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE -d file://");
104 String8 fileUrl("\"");
105 fileUrl.append(fileName);
106 fileUrl.append("\"");
107 cmd.append(fileName);
108 cmd.append(" > /dev/null");
109 int result = system(cmd.string());
111 fprintf(stderr, "Unable to broadcast intent for media scanner.\n");
112 return UNKNOWN_ERROR;
117 int main(int argc, char** argv)
119 const char* pname = argv[0];
121 int32_t displayId = DEFAULT_DISPLAY_ID;
123 while ((c = getopt(argc, argv, "phd:")) != -1) {
129 displayId = atoi(optarg);
141 const char* fn = NULL;
143 fd = dup(STDOUT_FILENO);
144 } else if (argc == 1) {
146 fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0664);
148 fprintf(stderr, "Error opening file: %s (%s)\n", fn, strerror(errno));
151 const int len = strlen(fn);
152 if (len >= 4 && 0 == strcmp(fn+len-4, ".png")) {
162 void const* mapbase = MAP_FAILED;
163 ssize_t mapsize = -1;
165 void const* base = NULL;
170 // Maps orientations from DisplayInfo to ISurfaceComposer
171 static const uint32_t ORIENTATION_MAP[] = {
172 ISurfaceComposer::eRotateNone, // 0 == DISPLAY_ORIENTATION_0
173 ISurfaceComposer::eRotate270, // 1 == DISPLAY_ORIENTATION_90
174 ISurfaceComposer::eRotate180, // 2 == DISPLAY_ORIENTATION_180
175 ISurfaceComposer::eRotate90, // 3 == DISPLAY_ORIENTATION_270
178 // setThreadPoolMaxThreadCount(0) actually tells the kernel it's
179 // not allowed to spawn any additional threads, but we still spawn
180 // a binder thread from userspace when we call startThreadPool().
181 // See b/36066697 for rationale
182 ProcessState::self()->setThreadPoolMaxThreadCount(0);
183 ProcessState::self()->startThreadPool();
185 ScreenshotClient screenshot;
186 sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(displayId);
187 if (display == NULL) {
188 fprintf(stderr, "Unable to get handle for display %d\n", displayId);
189 // b/36066697: Avoid running static destructors.
193 Vector<DisplayInfo> configs;
194 SurfaceComposerClient::getDisplayConfigs(display, &configs);
195 int activeConfig = SurfaceComposerClient::getActiveConfig(display);
196 if (static_cast<size_t>(activeConfig) >= configs.size()) {
197 fprintf(stderr, "Active config %d not inside configs (size %zu)\n",
198 activeConfig, configs.size());
199 // b/36066697: Avoid running static destructors.
202 uint8_t displayOrientation = configs[activeConfig].orientation;
203 uint32_t captureOrientation = ORIENTATION_MAP[displayOrientation];
205 status_t result = screenshot.update(display, Rect(),
206 0 /* reqWidth */, 0 /* reqHeight */,
207 INT32_MIN, INT32_MAX, /* all layers */
208 false, captureOrientation);
209 if (result == NO_ERROR) {
210 base = screenshot.getPixels();
211 w = screenshot.getWidth();
212 h = screenshot.getHeight();
213 s = screenshot.getStride();
214 f = screenshot.getFormat();
215 d = screenshot.getDataSpace();
216 size = screenshot.getSize();
221 const SkImageInfo info =
222 SkImageInfo::Make(w, h, flinger2skia(f), kPremul_SkAlphaType,
223 dataSpaceToColorSpace(d));
224 SkPixmap pixmap(info, base, s * bytesPerPixel(f));
225 struct FDWStream final : public SkWStream {
226 size_t fBytesWritten = 0;
228 FDWStream(int f) : fFd(f) {}
229 size_t bytesWritten() const override { return fBytesWritten; }
230 bool write(const void* buffer, size_t size) override {
231 fBytesWritten += size;
232 return size == 0 || ::write(fFd, buffer, size) > 0;
235 (void)SkEncodeImage(&fdStream, pixmap, SkEncodedImageFormat::kPNG, 100);
237 notifyMediaScanner(fn);
240 uint32_t c = dataSpaceToInt(d);
245 size_t Bpp = bytesPerPixel(f);
246 for (size_t y=0 ; y<h ; y++) {
247 write(fd, base, w*Bpp);
248 base = (void *)((char *)base + s*Bpp);
253 if (mapbase != MAP_FAILED) {
254 munmap((void *)mapbase, mapsize);
257 // b/36066697: Avoid running static destructors.