blob: b11e84322dde8eb8fa2b73e83ffb62c1880521cc [file] [log] [blame]
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <linux/fb.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <binder/ProcessState.h>
#include <gui/SurfaceComposerClient.h>
#include <gui/ISurfaceComposer.h>
#include <ui/DisplayInfo.h>
#include <ui/PixelFormat.h>
#include <system/graphics.h>
// TODO: Fix Skia.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#include <SkImageEncoder.h>
#include <SkData.h>
#include <SkColorSpace.h>
#pragma GCC diagnostic pop
using namespace android;
static uint32_t DEFAULT_DISPLAY_ID = ISurfaceComposer::eDisplayIdMain;
#define COLORSPACE_UNKNOWN 0
#define COLORSPACE_SRGB 1
#define COLORSPACE_DISPLAY_P3 2
static void usage(const char* pname)
{
fprintf(stderr,
"usage: %s [-hp] [-d display-id] [FILENAME]\n"
" -h: this message\n"
" -p: save the file as a png.\n"
" -d: specify the display id to capture, default %d.\n"
"If FILENAME ends with .png it will be saved as a png.\n"
"If FILENAME is not given, the results will be printed to stdout.\n",
pname, DEFAULT_DISPLAY_ID
);
}
static SkColorType flinger2skia(PixelFormat f)
{
switch (f) {
case PIXEL_FORMAT_RGB_565:
return kRGB_565_SkColorType;
default:
return kN32_SkColorType;
}
}
static sk_sp<SkColorSpace> dataSpaceToColorSpace(android_dataspace d)
{
switch (d) {
case HAL_DATASPACE_V0_SRGB:
return SkColorSpace::MakeSRGB();
case HAL_DATASPACE_DISPLAY_P3:
return SkColorSpace::MakeRGB(
SkColorSpace::kSRGB_RenderTargetGamma, SkColorSpace::kDCIP3_D65_Gamut);
default:
return nullptr;
}
}
static uint32_t dataSpaceToInt(android_dataspace d)
{
switch (d) {
case HAL_DATASPACE_V0_SRGB:
return COLORSPACE_SRGB;
case HAL_DATASPACE_DISPLAY_P3:
return COLORSPACE_DISPLAY_P3;
default:
return COLORSPACE_UNKNOWN;
}
}
static status_t notifyMediaScanner(const char* fileName) {
String8 cmd("am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE -d file://");
cmd.append(fileName);
cmd.append(" > /dev/null");
int result = system(cmd.string());
if (result < 0) {
fprintf(stderr, "Unable to broadcast intent for media scanner.\n");
return UNKNOWN_ERROR;
}
return NO_ERROR;
}
int main(int argc, char** argv)
{
const char* pname = argv[0];
bool png = false;
int32_t displayId = DEFAULT_DISPLAY_ID;
int c;
while ((c = getopt(argc, argv, "phd:")) != -1) {
switch (c) {
case 'p':
png = true;
break;
case 'd':
displayId = atoi(optarg);
break;
case '?':
case 'h':
usage(pname);
return 1;
}
}
argc -= optind;
argv += optind;
int fd = -1;
const char* fn = NULL;
if (argc == 0) {
fd = dup(STDOUT_FILENO);
} else if (argc == 1) {
fn = argv[0];
fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0664);
if (fd == -1) {
fprintf(stderr, "Error opening file: %s (%s)\n", fn, strerror(errno));
return 1;
}
const int len = strlen(fn);
if (len >= 4 && 0 == strcmp(fn+len-4, ".png")) {
png = true;
}
}
if (fd == -1) {
usage(pname);
return 1;
}
void const* mapbase = MAP_FAILED;
ssize_t mapsize = -1;
void* base = NULL;
uint32_t w, s, h, f;
android_dataspace d;
size_t size = 0;
// Maps orientations from DisplayInfo to ISurfaceComposer
static const uint32_t ORIENTATION_MAP[] = {
ISurfaceComposer::eRotateNone, // 0 == DISPLAY_ORIENTATION_0
ISurfaceComposer::eRotate270, // 1 == DISPLAY_ORIENTATION_90
ISurfaceComposer::eRotate180, // 2 == DISPLAY_ORIENTATION_180
ISurfaceComposer::eRotate90, // 3 == DISPLAY_ORIENTATION_270
};
// setThreadPoolMaxThreadCount(0) actually tells the kernel it's
// not allowed to spawn any additional threads, but we still spawn
// a binder thread from userspace when we call startThreadPool().
// See b/36066697 for rationale
ProcessState::self()->setThreadPoolMaxThreadCount(0);
ProcessState::self()->startThreadPool();
sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(displayId);
if (display == NULL) {
fprintf(stderr, "Unable to get handle for display %d\n", displayId);
return 1;
}
Vector<DisplayInfo> configs;
SurfaceComposerClient::getDisplayConfigs(display, &configs);
int activeConfig = SurfaceComposerClient::getActiveConfig(display);
if (static_cast<size_t>(activeConfig) >= configs.size()) {
fprintf(stderr, "Active config %d not inside configs (size %zu)\n",
activeConfig, configs.size());
return 1;
}
uint8_t displayOrientation = configs[activeConfig].orientation;
uint32_t captureOrientation = ORIENTATION_MAP[displayOrientation];
sp<GraphicBuffer> outBuffer;
status_t result = ScreenshotClient::capture(display, Rect(), 0 /* reqWidth */,
0 /* reqHeight */, INT32_MIN, INT32_MAX, /* all layers */ false, captureOrientation,
&outBuffer);
if (result != NO_ERROR) {
close(fd);
return 1;
}
result = outBuffer->lock(GraphicBuffer::USAGE_SW_READ_OFTEN, &base);
if (base == NULL) {
close(fd);
return 1;
}
w = outBuffer->getWidth();
h = outBuffer->getHeight();
s = outBuffer->getStride();
f = outBuffer->getPixelFormat();
d = HAL_DATASPACE_UNKNOWN;
size = s * h * bytesPerPixel(f);
if (png) {
const SkImageInfo info =
SkImageInfo::Make(w, h, flinger2skia(f), kPremul_SkAlphaType, dataSpaceToColorSpace(d));
SkPixmap pixmap(info, base, s * bytesPerPixel(f));
struct FDWStream final : public SkWStream {
size_t fBytesWritten = 0;
int fFd;
FDWStream(int f) : fFd(f) {}
size_t bytesWritten() const override { return fBytesWritten; }
bool write(const void* buffer, size_t size) override {
fBytesWritten += size;
return size == 0 || ::write(fFd, buffer, size) > 0;
}
} fdStream(fd);
(void)SkEncodeImage(&fdStream, pixmap, SkEncodedImageFormat::kPNG, 100);
if (fn != NULL) {
notifyMediaScanner(fn);
}
} else {
uint32_t c = dataSpaceToInt(d);
write(fd, &w, 4);
write(fd, &h, 4);
write(fd, &f, 4);
write(fd, &c, 4);
size_t Bpp = bytesPerPixel(f);
for (size_t y=0 ; y<h ; y++) {
write(fd, base, w*Bpp);
base = (void *)((char *)base + s*Bpp);
}
}
close(fd);
if (mapbase != MAP_FAILED) {
munmap((void *)mapbase, mapsize);
}
return 0;
}