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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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 Digia. For licensing terms and
** conditions see http://www.qt.io/licensing. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "screenshotcropper.h"
#include <coreplugin/icore.h>
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
#include <QDebug>
#include <QFile>
#include <QFileInfo>
namespace QtSupport {
namespace Internal {
class AreasOfInterest {
public:
AreasOfInterest();
QMap<QString, QRect> areas;
};
AreasOfInterest::AreasOfInterest()
{
#ifdef QT_CREATOR
areas = ScreenshotCropper::loadAreasOfInterest(Core::ICore::resourcePath() + QLatin1String("/welcomescreen/images_areaofinterest.xml"));
#endif // QT_CREATOR
}
Q_GLOBAL_STATIC(AreasOfInterest, welcomeScreenAreas)
static inline QString fileNameForPath(const QString &path)
{
return QFileInfo(path).fileName();
}
static QRect cropRectForAreaOfInterest(const QSize &imageSize, const QSize &cropSize, const QRect &areaOfInterest)
{
QRect result;
const qreal cropSizeToAreaSizeFactor = qMin(cropSize.width() / qreal(areaOfInterest.width()),
cropSize.height() / qreal(areaOfInterest.height()));
if (cropSizeToAreaSizeFactor >= 1) {
const QPoint areaOfInterestCenter = areaOfInterest.center();
const int cropX = qBound(0,
areaOfInterestCenter.x() - cropSize.width() / 2,
imageSize.width() - cropSize.width());
const int cropY = qBound(0,
areaOfInterestCenter.y() - cropSize.height() / 2,
imageSize.height() - cropSize.height());
const int cropWidth = qMin(imageSize.width(), cropSize.width());
const int cropHeight = qMin(imageSize.height(), cropSize.height());
result = QRect(cropX, cropY, cropWidth, cropHeight);
} else {
QSize resultSize = cropSize.expandedTo(areaOfInterest.size());
result = QRect(QPoint(), resultSize);
}
return result;
}
QImage ScreenshotCropper::croppedImage(const QImage &sourceImage, const QString &filePath, const QSize &cropSize)
{
const QRect areaOfInterest = welcomeScreenAreas()->areas.value(fileNameForPath(filePath));
if (areaOfInterest.isValid()) {
const QRect cropRect = cropRectForAreaOfInterest(sourceImage.size(), cropSize, areaOfInterest);
const QSize cropRectSize = cropRect.size();
const QImage result = sourceImage.copy(cropRect);
if (cropRectSize.width() > cropSize.width() || cropRectSize.height() > cropSize.height())
return result.scaled(cropSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
else
return result;
}
return sourceImage.scaled(cropSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
static int areaAttribute(const QXmlStreamAttributes &attributes, const QString &name)
{
bool ok;
const int result = attributes.value(name).toString().toInt(&ok);
if (!ok)
qWarning() << Q_FUNC_INFO << "Could not parse" << name << "for" << attributes.value(QLatin1String("image")).toString();
return result;
}
static const QString xmlTagAreas = QLatin1String("areas");
static const QString xmlTagArea = QLatin1String("area");
static const QString xmlAttributeImage = QLatin1String("image");
static const QString xmlAttributeX = QLatin1String("x");
static const QString xmlAttributeY = QLatin1String("y");
static const QString xmlAttributeWidth = QLatin1String("width");
static const QString xmlAttributeHeight = QLatin1String("height");
QMap<QString, QRect> ScreenshotCropper::loadAreasOfInterest(const QString &areasXmlFile)
{
QMap<QString, QRect> areasOfInterest;
QFile xmlFile(areasXmlFile);
if (!xmlFile.open(QIODevice::ReadOnly)) {
qWarning() << Q_FUNC_INFO << "Could not open file" << areasXmlFile;
return areasOfInterest;
}
QXmlStreamReader reader(&xmlFile);
while (!reader.atEnd()) {
switch (reader.readNext()) {
case QXmlStreamReader::StartElement:
if (reader.name() == xmlTagArea) {
const QXmlStreamAttributes attributes = reader.attributes();
const QString imageName = attributes.value(xmlAttributeImage).toString();
if (imageName.isEmpty())
qWarning() << Q_FUNC_INFO << "Could not parse name";
const QRect area(areaAttribute(attributes, xmlAttributeX), areaAttribute(attributes, xmlAttributeY),
areaAttribute(attributes, xmlAttributeWidth), areaAttribute(attributes, xmlAttributeHeight));
areasOfInterest.insert(imageName, area);
}
break;
default: // nothing
break;
}
}
return areasOfInterest;
}
bool ScreenshotCropper::saveAreasOfInterest(const QString &areasXmlFile, QMap<QString, QRect> &areas)
{
QFile file(areasXmlFile);
if (!file.open(QIODevice::WriteOnly))
return false;
QXmlStreamWriter writer(&file);
writer.setAutoFormatting(true);
writer.writeStartDocument();
writer.writeStartElement(xmlTagAreas);
QMapIterator<QString, QRect> i(areas);
while (i.hasNext()) {
i.next();
writer.writeStartElement(xmlTagArea);
writer.writeAttribute(xmlAttributeImage, i.key());
writer.writeAttribute(xmlAttributeX, QString::number(i.value().x()));
writer.writeAttribute(xmlAttributeY, QString::number(i.value().y()));
writer.writeAttribute(xmlAttributeWidth, QString::number(i.value().width()));
writer.writeAttribute(xmlAttributeHeight, QString::number(i.value().height()));
writer.writeEndElement(); // xmlTagArea
}
writer.writeEndElement(); // xmlTagAreas
writer.writeEndDocument();
return true;
}
} // namespace Internal
} // namespace QtSupport
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