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diff --git a/src/gui/kernel/qinternalmimedata.cpp b/src/gui/kernel/qinternalmimedata.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or 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.GPL2 and 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-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qinternalmimedata_p.h"
+
+#include <QtCore/qbuffer.h>
+#include <QtGui/qimage.h>
+#include <QtGui/qimagereader.h>
+#include <QtGui/qimagewriter.h>
+
+QT_BEGIN_NAMESPACE
+
+static QStringList imageMimeFormats(const QList<QByteArray> &imageFormats)
+{
+ QStringList formats;
+ formats.reserve(imageFormats.size());
+ for (const auto &format : imageFormats)
+ formats.append(QLatin1String("image/") + QLatin1String(format.toLower()));
+
+ //put png at the front because it is best
+ int pngIndex = formats.indexOf(QLatin1String("image/png"));
+ if (pngIndex != -1 && pngIndex != 0)
+ formats.move(pngIndex, 0);
+
+ return formats;
+}
+
+static inline QStringList imageReadMimeFormats()
+{
+ return imageMimeFormats(QImageReader::supportedImageFormats());
+}
+
+static inline QStringList imageWriteMimeFormats()
+{
+ return imageMimeFormats(QImageWriter::supportedImageFormats());
+}
+
+QInternalMimeData::QInternalMimeData()
+ : QMimeData()
+{
+}
+
+QInternalMimeData::~QInternalMimeData()
+{
+}
+
+bool QInternalMimeData::hasFormat(const QString &mimeType) const
+{
+ bool foundFormat = hasFormat_sys(mimeType);
+ if (!foundFormat && mimeType == QLatin1String("application/x-qt-image")) {
+ QStringList imageFormats = imageReadMimeFormats();
+ for (int i = 0; i < imageFormats.size(); ++i) {
+ if ((foundFormat = hasFormat_sys(imageFormats.at(i))))
+ break;
+ }
+ }
+ return foundFormat;
+}
+
+QStringList QInternalMimeData::formats() const
+{
+ QStringList realFormats = formats_sys();
+ if (!realFormats.contains(QLatin1String("application/x-qt-image"))) {
+ QStringList imageFormats = imageReadMimeFormats();
+ for (int i = 0; i < imageFormats.size(); ++i) {
+ if (realFormats.contains(imageFormats.at(i))) {
+ realFormats += QLatin1String("application/x-qt-image");
+ break;
+ }
+ }
+ }
+ return realFormats;
+}
+
+QVariant QInternalMimeData::retrieveData(const QString &mimeType, QVariant::Type type) const
+{
+ QVariant data = retrieveData_sys(mimeType, type);
+ if (mimeType == QLatin1String("application/x-qt-image")) {
+ if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty())) {
+ // try to find an image
+ QStringList imageFormats = imageReadMimeFormats();
+ for (int i = 0; i < imageFormats.size(); ++i) {
+ data = retrieveData_sys(imageFormats.at(i), type);
+ if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty()))
+ continue;
+ break;
+ }
+ }
+ // we wanted some image type, but all we got was a byte array. Convert it to an image.
+ if (data.type() == QVariant::ByteArray
+ && (type == QVariant::Image || type == QVariant::Pixmap || type == QVariant::Bitmap))
+ data = QImage::fromData(data.toByteArray());
+
+ } else if (mimeType == QLatin1String("application/x-color") && data.type() == QVariant::ByteArray) {
+ QColor c;
+ QByteArray ba = data.toByteArray();
+ if (ba.size() == 8) {
+ ushort * colBuf = (ushort *)ba.data();
+ c.setRgbF(qreal(colBuf[0]) / qreal(0xFFFF),
+ qreal(colBuf[1]) / qreal(0xFFFF),
+ qreal(colBuf[2]) / qreal(0xFFFF),
+ qreal(colBuf[3]) / qreal(0xFFFF));
+ data = c;
+ } else {
+ qWarning("Qt: Invalid color format");
+ }
+ } else if (data.type() != type && data.type() == QVariant::ByteArray) {
+ // try to use mime data's internal conversion stuf.
+ QInternalMimeData *that = const_cast<QInternalMimeData *>(this);
+ that->setData(mimeType, data.toByteArray());
+ data = QMimeData::retrieveData(mimeType, type);
+ that->clear();
+ }
+ return data;
+}
+
+bool QInternalMimeData::canReadData(const QString &mimeType)
+{
+ return imageReadMimeFormats().contains(mimeType);
+}
+
+// helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.
+QStringList QInternalMimeData::formatsHelper(const QMimeData *data)
+{
+ QStringList realFormats = data->formats();
+ if (realFormats.contains(QLatin1String("application/x-qt-image"))) {
+ // add all supported image formats
+ QStringList imageFormats = imageWriteMimeFormats();
+ for (int i = 0; i < imageFormats.size(); ++i) {
+ if (!realFormats.contains(imageFormats.at(i)))
+ realFormats.append(imageFormats.at(i));
+ }
+ }
+ return realFormats;
+}
+
+bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data)
+{
+
+ bool foundFormat = data->hasFormat(mimeType);
+ if (!foundFormat) {
+ if (mimeType == QLatin1String("application/x-qt-image")) {
+ // check all supported image formats
+ QStringList imageFormats = imageWriteMimeFormats();
+ for (int i = 0; i < imageFormats.size(); ++i) {
+ if ((foundFormat = data->hasFormat(imageFormats.at(i))))
+ break;
+ }
+ } else if (mimeType.startsWith(QLatin1String("image/"))) {
+ return data->hasImage() && imageWriteMimeFormats().contains(mimeType);
+ }
+ }
+ return foundFormat;
+}
+
+QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data)
+{
+ QByteArray ba;
+ if (mimeType == QLatin1String("application/x-color")) {
+ /* QMimeData can only provide colors as QColor or the name
+ of a color as a QByteArray or a QString. So we need to do
+ the conversion to application/x-color here.
+ The application/x-color format is :
+ type: application/x-color
+ format: 16
+ data[0]: red
+ data[1]: green
+ data[2]: blue
+ data[3]: opacity
+ */
+ ba.resize(8);
+ ushort * colBuf = (ushort *)ba.data();
+ QColor c = qvariant_cast<QColor>(data->colorData());
+ colBuf[0] = ushort(c.redF() * 0xFFFF);
+ colBuf[1] = ushort(c.greenF() * 0xFFFF);
+ colBuf[2] = ushort(c.blueF() * 0xFFFF);
+ colBuf[3] = ushort(c.alphaF() * 0xFFFF);
+ } else {
+ ba = data->data(mimeType);
+ if (ba.isEmpty()) {
+ if (mimeType == QLatin1String("application/x-qt-image") && data->hasImage()) {
+ QImage image = qvariant_cast<QImage>(data->imageData());
+ QBuffer buf(&ba);
+ buf.open(QBuffer::WriteOnly);
+ // would there not be PNG ??
+ image.save(&buf, "PNG");
+ } else if (mimeType.startsWith(QLatin1String("image/")) && data->hasImage()) {
+ QImage image = qvariant_cast<QImage>(data->imageData());
+ QBuffer buf(&ba);
+ buf.open(QBuffer::WriteOnly);
+ image.save(&buf, mimeType.mid(mimeType.indexOf(QLatin1Char('/')) + 1).toLatin1().toUpper());
+ }
+ }
+ }
+ return ba;
+}
+
+QT_END_NAMESPACE
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