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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QTimer>
#include <QtCore/QDebug>
#include <QtCore/QFileInfo>
#include <QtCore/QHashFunctions>
#include <QtGui/QGuiApplication>
#include <QtGui/QImage>
#include <private/q3dsengine_p.h>
#include <private/q3dswindow_p.h>
#include <private/q3dsutils_p.h>
#include <Qt3DRender/QRenderCapture>
#include <Qt3DRender/QRenderCaptureReply>
// Timeout values:
// A valid screen grab requires the scene to not change
// for SCENE_STABLE_TIME ms
#define SCENE_STABLE_TIME 200
// Give up after SCENE_TIMEOUT ms
#define SCENE_TIMEOUT 10000
class GrabbingView : public Q3DSWindow
{
Q_OBJECT
public:
GrabbingView(const QString &outputFile)
: q3dsEngine(new Q3DSEngine)
, ofile(outputFile)
, grabNo(0)
, isGrabbing(false)
, initDone(false)
{
setEngine(q3dsEngine);
grabTimer = new QTimer(this);
grabTimer->setSingleShot(true);
grabTimer->setInterval(SCENE_STABLE_TIME);
connect(grabTimer, SIGNAL(timeout()), q3dsEngine, SLOT(requestGrab()));
connect(q3dsEngine, SIGNAL(nextFrameStarting()), SLOT(startGrabbing()));
connect(q3dsEngine, SIGNAL(grabReady(QImage)), this, SLOT(grab(QImage)));
QTimer::singleShot(SCENE_TIMEOUT, this, SLOT(timedOut()));
}
~GrabbingView()
{
delete q3dsEngine;
}
private slots:
void startGrabbing()
{
if (!initDone) {
initDone = true;
grabTimer->start();
}
}
bool isJustClear(const QImage &image) {
QColor color = image.pixel(0, 0);
QImage imageCopy = image;
imageCopy.fill(color);
return image == imageCopy;
}
void grab(QImage image)
{
if (isGrabbing)
return;
isGrabbing = true;
grabNo++;
if (!image.isNull() && !isJustClear(image) && image == lastGrab) {
sceneStabilized();
} else {
lastGrab = image;
grabTimer->start();
}
isGrabbing = false;
}
void sceneStabilized()
{
if (ofile == "-") { // Write to stdout
QFile of;
if (!of.open(1, QIODevice::WriteOnly) || !lastGrab.save(&of, "ppm")) {
qWarning() << "Error: failed to write grabbed image to stdout.";
QGuiApplication::exit(2);
return;
}
} else {
if (!lastGrab.save(ofile)) {
qWarning() << "Error: failed to store grabbed image to" << ofile;
QGuiApplication::exit(2);
return;
}
}
QGuiApplication::exit(0);
}
void timedOut()
{
qWarning() << "Error: timed out waiting for scene to stabilize." << grabNo << "grab(s) done. Last grab was" << (lastGrab.isNull() ? "invalid." : "valid.");
QGuiApplication::exit(3);
}
private:
Q3DSEngine *q3dsEngine;
QImage lastGrab;
QTimer *grabTimer;
QString ofile;
int grabNo;
bool isGrabbing;
bool initDone;
};
int main(int argc, char *argv[])
{
qSetGlobalQHashSeed(0);
QGuiApplication a(argc, argv);
QSurfaceFormat::setDefaultFormat(Q3DS::surfaceFormat());
Q3DSUtils::setDialogsEnabled(false);
// Parse command line
QString ifile, ofile;
QStringList args = a.arguments();
int i = 0;
bool argError = false;
while (++i < args.size()) {
QString arg = args.at(i);
if ((arg == "-o") && (i < args.size()-1)) {
ofile = args.at(++i);
} else if (ifile.isEmpty()) {
ifile = arg;
} else {
argError = true;
break;
}
}
if (argError || ifile.isEmpty() || ofile.isEmpty()) {
qWarning() << "Usage:" << args.at(0).toLatin1().constData() << "<uip-infile> -o <outfile or - for ppm on stdout>";
return 1;
}
QFileInfo ifi(ifile);
if (!ifi.exists() || !ifi.isReadable() || !ifi.isFile()) {
qWarning() << args.at(0).toLatin1().constData() << " error: unreadable input file" << ifile;
return 1;
}
// End parsing
GrabbingView v(ofile);
v.engine()->setSource(ifile);
v.forceResize(1280, 720);
v.show();
int retVal = a.exec();
return retVal;
}
#include "main.moc"
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