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/*
* Copyright 2020 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.
*/
#pragma once
#include <SkDocument.h>
#include <SkNWayCanvas.h>
#include <SkPictureRecorder.h>
#include <SkSurface.h>
#include <chrono>
#include <mutex>
#include "CaptureTimer.h"
#include "tools/SkSharingProc.h"
namespace android {
namespace renderengine {
namespace skia {
using namespace std::chrono_literals;
/**
* Class that captures frames that are sent to Skia in Render Engine. It sets up
* a multi frame capture and writes it into a file on the device. The capture is
* done based on a timer.
*/
class SkiaCapture {
using Interval = std::chrono::milliseconds;
public:
SkiaCapture() {}
virtual ~SkiaCapture();
// Called every frame. Normally returns early with screen canvas.
// But when capture is enabled, returns an nwaycanvas where commands are also recorded.
SkCanvas* tryCapture(SkSurface* surface);
// Called at the end of every frame.
void endCapture();
// Returns whether the capture is running.
bool isCaptureRunning() { return mCaptureRunning; }
// Offscreen state member variables are private to SkiaCapture, but the allocation
// and lifetime is managed by the caller. This enables nested offscreen
// captures to occur.
struct OffscreenState {
std::unique_ptr<SkPictureRecorder> offscreenRecorder;
std::unique_ptr<SkNWayCanvas> offscreenCanvas;
};
SkCanvas* tryOffscreenCapture(SkSurface* surface, OffscreenState* state);
uint64_t endOffscreenCapture(OffscreenState* state);
private:
// Performs the first-frame work of a multi frame SKP capture. Returns true if successful.
bool setupMultiFrameCapture();
// Closes the recording and serializes sequence to a file.
void writeToFile();
// Multi frame serialization stream and writer used when serializing more than one frame.
std::unique_ptr<SkFILEWStream> mOpenMultiPicStream;
sk_sp<SkDocument> mMultiPic;
std::unique_ptr<SkSharingSerialContext> mSerialContext;
std::unique_ptr<SkNWayCanvas> mNwayCanvas;
SkCanvas* mCurrentPageCanvas = nullptr;
// Capturing and interval control.
bool mCaptureRunning = false;
CaptureTimer mTimer;
Interval mTimerInterval = 0ms;
// Mutex to ensure that a frame in progress when the timer fires is allowed to run to
// completion before we write the file to disk.
std::mutex mMutex;
std::string mCaptureFile;
};
} // namespace skia
} // namespace renderengine
} // namespace android
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