duperagent/imageutils.cpp at master · rmallah/duperagent · GitHub

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// Copyright 2016 Cutehacks AS. All rights reserved.
// License can be found in the LICENSE file.

#include<QtCore/QFileInfo>
#include<QtCore/QBuffer>
#include<QtCore/QUrl>
#include<QtGui/QImageReader>
#include<QtQml/QQmlEngine>
#include"imageutils.h"

#include<QDebug>

namespacecom { namespacecutehacks { namespaceduperagent {

ImageUtils::ImageUtils(QQmlEngine *engine) :
QObject(0),
m_engine(engine)
{}

QJSValue ImageUtils::createReader(const QString &filename)
{
return (newImage(m_engine, filename))->self();
}

Image::Image(QQmlEngine *engine, const QString &filename) :
AbstractMultipartSource(),
m_engine(engine)
{
 m_self = engine->newQObject(this);
 engine->setObjectOwnership(this, QQmlEngine::JavaScriptOwnership);
if (filename.startsWith(QStringLiteral("data:"))) {
int comma = filename.indexOf(QChar(','));
 QStringRef data = filename.midRef(comma+1);
 QBuffer *buffer = newQBuffer(this);
 buffer->setData(QByteArray::fromBase64(data.toLatin1()));
 m_reader = newQImageReader(buffer);
 } else {
 QUrl url(filename);
 m_reader = newQImageReader(url.isLocalFile() ? url.toLocalFile() : filename);
 }
}

Image::~Image()
{
delete m_reader;
}

QJSValue Image::size() const
{
 QJSValue val = m_engine->newObject();
 QSize s = m_reader->size();
 val.setProperty("width", s.width());
 val.setProperty("height", s.height());
return val;
}

intImage::fileSize() const
{
 QString fn = m_reader->fileName();
if (!fn.isEmpty()) {
 QFileInfo info(m_reader->fileName());
return (int)info.size();
 } else {
return m_reader->device()->size();
 }
}

QJSValue Image::setScaledSize(int w, int h, const QJSValue &scaleMode)
{
 QSize newSize(w, h);
if (scaleMode.isNumber()) {
int mode = scaleMode.toInt();
if (mode < 0 || mode > 2) {
qWarning("Invalid scale mode");
 } else {
 QSize original = m_reader->size();
 newSize = original.scaled(newSize, (Qt::AspectRatioMode)mode);
 }
 }
 m_reader->setScaledSize(newSize);
returnself();
}

QJSValue Image::setClipRect(int x, int y, int w, int h)
{
 m_reader->setClipRect(QRect(x, y, w, h));
returnself();
}

QJSValue Image::setScaledClipRect(int x, int y, int w, int h)
{
 m_reader->setClipRect(QRect(x, y, w, h));
returnself();
}

QJSValue Image::setAutoTransform(bool)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
 m_reader->setAutoTransform(true);
#endif
returnself();
}

QString Image::toJSON()
{
returnQStringLiteral("data:%1;base64,%2")
 .arg(m_mimeType)
 .arg(QString::fromLatin1(m_data.toBase64()));
}

QJSValue Image::read(const QJSValue& options)
{
 QByteArray format = m_reader->format();
int quality = -1;

if (options.isObject()) {
 QJSValue transcodeOptions = options.property("transcode");
if (!transcodeOptions.isUndefined()) {
 QJSValue f = transcodeOptions.property("format");
if (!f.isUndefined())
 format = f.toString().toUtf8();

 QJSValue q = transcodeOptions.property("quality");
if (!q.isUndefined())
 quality = q.toInt();
 }
 }

 QImage img = m_reader->read();
if (img.isNull()) {
qWarning("Error reading image: %s", qUtf8Printable(m_reader->errorString()));
returnself();
 }

 QBuffer buffer(&m_data);
 buffer.open(QIODevice::WriteOnly);
 img.save(&buffer, format.constData(), quality);
 m_mimeType = QStringLiteral("image/%1")
 .arg(QString::fromLatin1(format.constData()));

returnself();
}

QByteArray Image::data() const
{
return m_data;
}

QString Image::mimeType() const
{
return m_mimeType;
}

} } }