257 lines
7.8 KiB
C++
257 lines
7.8 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/fb.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <binder/ProcessState.h>
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#include <gui/SurfaceComposerClient.h>
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#include <gui/ISurfaceComposer.h>
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#include <ui/DisplayInfo.h>
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#include <ui/PixelFormat.h>
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#include <system/graphics.h>
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// TODO: Fix Skia.
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#include <SkImageEncoder.h>
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#include <SkData.h>
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#include <SkColorSpace.h>
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#pragma GCC diagnostic pop
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using namespace android;
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static uint32_t DEFAULT_DISPLAY_ID = ISurfaceComposer::eDisplayIdMain;
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#define COLORSPACE_UNKNOWN 0
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#define COLORSPACE_SRGB 1
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#define COLORSPACE_DISPLAY_P3 2
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static void usage(const char* pname)
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{
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fprintf(stderr,
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"usage: %s [-hp] [-d display-id] [FILENAME]\n"
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" -h: this message\n"
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" -p: save the file as a png.\n"
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" -d: specify the display id to capture, default %d.\n"
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"If FILENAME ends with .png it will be saved as a png.\n"
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"If FILENAME is not given, the results will be printed to stdout.\n",
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pname, DEFAULT_DISPLAY_ID
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);
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}
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static SkColorType flinger2skia(PixelFormat f)
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{
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switch (f) {
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case PIXEL_FORMAT_RGB_565:
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return kRGB_565_SkColorType;
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default:
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return kN32_SkColorType;
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}
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}
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static sk_sp<SkColorSpace> dataSpaceToColorSpace(android_dataspace d)
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{
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switch (d) {
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case HAL_DATASPACE_V0_SRGB:
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return SkColorSpace::MakeSRGB();
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case HAL_DATASPACE_DISPLAY_P3:
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return SkColorSpace::MakeRGB(
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SkColorSpace::kSRGB_RenderTargetGamma, SkColorSpace::kDCIP3_D65_Gamut);
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default:
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return nullptr;
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}
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}
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static uint32_t dataSpaceToInt(android_dataspace d)
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{
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switch (d) {
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case HAL_DATASPACE_V0_SRGB:
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return COLORSPACE_SRGB;
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case HAL_DATASPACE_DISPLAY_P3:
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return COLORSPACE_DISPLAY_P3;
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default:
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return COLORSPACE_UNKNOWN;
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}
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}
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static status_t notifyMediaScanner(const char* fileName) {
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String8 cmd("am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE -d file://");
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cmd.append(fileName);
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cmd.append(" > /dev/null");
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int result = system(cmd.string());
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if (result < 0) {
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fprintf(stderr, "Unable to broadcast intent for media scanner.\n");
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return UNKNOWN_ERROR;
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}
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return NO_ERROR;
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}
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int main(int argc, char** argv)
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{
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const char* pname = argv[0];
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bool png = false;
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int32_t displayId = DEFAULT_DISPLAY_ID;
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int c;
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while ((c = getopt(argc, argv, "phd:")) != -1) {
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switch (c) {
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case 'p':
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png = true;
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break;
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case 'd':
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displayId = atoi(optarg);
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break;
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case '?':
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case 'h':
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usage(pname);
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return 1;
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}
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}
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argc -= optind;
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argv += optind;
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int fd = -1;
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const char* fn = NULL;
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if (argc == 0) {
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fd = dup(STDOUT_FILENO);
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} else if (argc == 1) {
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fn = argv[0];
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fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0664);
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if (fd == -1) {
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fprintf(stderr, "Error opening file: %s (%s)\n", fn, strerror(errno));
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return 1;
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}
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const int len = strlen(fn);
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if (len >= 4 && 0 == strcmp(fn+len-4, ".png")) {
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png = true;
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}
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}
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if (fd == -1) {
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usage(pname);
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return 1;
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}
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void const* mapbase = MAP_FAILED;
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ssize_t mapsize = -1;
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void const* base = NULL;
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uint32_t w, s, h, f;
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android_dataspace d;
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size_t size = 0;
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// Maps orientations from DisplayInfo to ISurfaceComposer
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static const uint32_t ORIENTATION_MAP[] = {
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ISurfaceComposer::eRotateNone, // 0 == DISPLAY_ORIENTATION_0
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ISurfaceComposer::eRotate270, // 1 == DISPLAY_ORIENTATION_90
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ISurfaceComposer::eRotate180, // 2 == DISPLAY_ORIENTATION_180
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ISurfaceComposer::eRotate90, // 3 == DISPLAY_ORIENTATION_270
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};
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// setThreadPoolMaxThreadCount(0) actually tells the kernel it's
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// not allowed to spawn any additional threads, but we still spawn
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// a binder thread from userspace when we call startThreadPool().
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// See b/36066697 for rationale
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ProcessState::self()->setThreadPoolMaxThreadCount(0);
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ProcessState::self()->startThreadPool();
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ScreenshotClient screenshot;
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sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(displayId);
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if (display == NULL) {
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fprintf(stderr, "Unable to get handle for display %d\n", displayId);
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// b/36066697: Avoid running static destructors.
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_exit(1);
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}
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Vector<DisplayInfo> configs;
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SurfaceComposerClient::getDisplayConfigs(display, &configs);
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int activeConfig = SurfaceComposerClient::getActiveConfig(display);
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if (static_cast<size_t>(activeConfig) >= configs.size()) {
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fprintf(stderr, "Active config %d not inside configs (size %zu)\n",
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activeConfig, configs.size());
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// b/36066697: Avoid running static destructors.
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_exit(1);
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}
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uint8_t displayOrientation = configs[activeConfig].orientation;
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uint32_t captureOrientation = ORIENTATION_MAP[displayOrientation];
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status_t result = screenshot.update(display, Rect(),
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0 /* reqWidth */, 0 /* reqHeight */,
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INT32_MIN, INT32_MAX, /* all layers */
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false, captureOrientation);
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if (result == NO_ERROR) {
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base = screenshot.getPixels();
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w = screenshot.getWidth();
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h = screenshot.getHeight();
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s = screenshot.getStride();
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f = screenshot.getFormat();
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d = screenshot.getDataSpace();
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size = screenshot.getSize();
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}
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if (base != NULL) {
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if (png) {
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const SkImageInfo info =
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SkImageInfo::Make(w, h, flinger2skia(f), kPremul_SkAlphaType,
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dataSpaceToColorSpace(d));
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SkPixmap pixmap(info, base, s * bytesPerPixel(f));
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struct FDWStream final : public SkWStream {
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size_t fBytesWritten = 0;
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int fFd;
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FDWStream(int f) : fFd(f) {}
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size_t bytesWritten() const override { return fBytesWritten; }
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bool write(const void* buffer, size_t size) override {
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fBytesWritten += size;
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return size == 0 || ::write(fFd, buffer, size) > 0;
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}
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} fdStream(fd);
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(void)SkEncodeImage(&fdStream, pixmap, SkEncodedImageFormat::kPNG, 100);
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if (fn != NULL) {
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notifyMediaScanner(fn);
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}
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} else {
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uint32_t c = dataSpaceToInt(d);
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write(fd, &w, 4);
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write(fd, &h, 4);
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write(fd, &f, 4);
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write(fd, &c, 4);
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size_t Bpp = bytesPerPixel(f);
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for (size_t y=0 ; y<h ; y++) {
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write(fd, base, w*Bpp);
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base = (void *)((char *)base + s*Bpp);
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}
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}
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}
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close(fd);
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if (mapbase != MAP_FAILED) {
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munmap((void *)mapbase, mapsize);
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}
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// b/36066697: Avoid running static destructors.
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_exit(0);
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}
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