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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CompositionRecorder.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/gfxVars.h"
#include "nsIInputStream.h"
#include "nsIBinaryOutputStream.h"
#include "nsIObjectOutputStream.h"
#include "prtime.h"
#include <ctime>
#include <iomanip>
#include "stdio.h"
#ifdef XP_WIN
# include "direct.h"
#else
# include <sys/types.h>
# include "sys/stat.h"
#endif
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
CompositionRecorder::CompositionRecorder(TimeStamp aRecordingStart)
: mRecordingStart(aRecordingStart) {}
void CompositionRecorder::RecordFrame(RecordedFrame* aFrame) {
mCollectedFrames.AppendElement(aFrame);
}
void CompositionRecorder::WriteCollectedFrames() {
// The directory has the format of
// "[LayersWindowRecordingPath]/windowrecording-[mRecordingStartTime as unix
// timestamp]". We need mRecordingStart as a unix timestamp here because we
// want the consumer of these files to be able to compute an absolute
// timestamp of each screenshot, so that we can align screenshots with timed
// data from other sources, such as Gecko profiler information. The time of
// each screenshot is part of the screenshot's filename, expressed as
// milliseconds *relative to mRecordingStart*. We want to compute the number
// of milliseconds between midnight 1 January 1970 UTC and mRecordingStart,
// unfortunately, mozilla::TimeStamp does not have a built-in way of doing
// that. However, PR_Now() returns the number of microseconds since midnight 1
// January 1970 UTC. We call PR_Now() and TimeStamp::NowUnfuzzed() very
// closely to each other so that they return their representation of "the same
// time", and then compute (Now - (Now - mRecordingStart)).
std::stringstream str;
nsCString recordingStartTime;
TimeDuration delta = TimeStamp::NowUnfuzzed() - mRecordingStart;
recordingStartTime.AppendFloat(
static_cast<double>(PR_Now() / 1000.0 - delta.ToMilliseconds()));
str << gfxVars::LayersWindowRecordingPath() << "windowrecording-"
<< recordingStartTime;
#ifdef XP_WIN
_mkdir(str.str().c_str());
#else
mkdir(str.str().c_str(), 0777);
#endif
uint32_t i = 1;
for (RefPtr<RecordedFrame>& frame : mCollectedFrames) {
RefPtr<DataSourceSurface> surf = frame->GetSourceSurface();
std::stringstream filename;
filename << str.str() << "/frame-" << i << "-"
<< uint32_t(
(frame->GetTimeStamp() - mRecordingStart).ToMilliseconds())
<< ".png";
gfxUtils::WriteAsPNG(surf, filename.str().c_str());
i++;
}
mCollectedFrames.Clear();
}
CollectedFrames CompositionRecorder::GetCollectedFrames() {
nsTArray<CollectedFrame> frames;
TimeDuration delta = TimeStamp::NowUnfuzzed() - mRecordingStart;
double recordingStart = PR_Now() / 1000.0 - delta.ToMilliseconds();
for (RefPtr<RecordedFrame>& frame : mCollectedFrames) {
nsCString buffer;
RefPtr<DataSourceSurface> surf = frame->GetSourceSurface();
double offset = (frame->GetTimeStamp() - mRecordingStart).ToMilliseconds();
gfxUtils::EncodeSourceSurface(surf, ImageType::PNG, u""_ns,
gfxUtils::eDataURIEncode, nullptr, &buffer);
frames.EmplaceBack(offset, std::move(buffer));
}
mCollectedFrames.Clear();
return CollectedFrames(recordingStart, std::move(frames));
}
void CompositionRecorder::ClearCollectedFrames() { mCollectedFrames.Clear(); }
} // namespace layers
} // namespace mozilla
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