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/****************************************************************************
**
** Copyright (C) 2016 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QIMAGEIOHANDLER_H
#define QIMAGEIOHANDLER_H
#include <QtGui/qtguiglobal.h>
#include <QtCore/qiodevice.h>
#include <QtCore/qplugin.h>
#include <QtCore/qfactoryinterface.h>
#include <QtCore/qscopedpointer.h>
QT_BEGIN_NAMESPACE
class QImage;
class QRect;
class QSize;
class QVariant;
class QImageIOHandlerPrivate;
class Q_GUI_EXPORT QImageIOHandler
{
Q_DECLARE_PRIVATE(QImageIOHandler)
public:
QImageIOHandler();
virtual ~QImageIOHandler();
void setDevice(QIODevice *device);
QIODevice *device() const;
void setFormat(const QByteArray &format);
void setFormat(const QByteArray &format) const;
QByteArray format() const;
#if QT_DEPRECATED_SINCE(5, 13)
QT_DEPRECATED_X("Use QImageIOHandler::format() instead")
virtual QByteArray name() const;
#endif
virtual bool canRead() const = 0;
virtual bool read(QImage *image) = 0;
virtual bool write(const QImage &image);
enum ImageOption {
Size,
ClipRect,
Description,
ScaledClipRect,
ScaledSize,
CompressionRatio,
Gamma,
Quality,
Name,
SubType,
IncrementalReading,
Endianness,
Animation,
BackgroundColor,
ImageFormat,
SupportedSubTypes,
OptimizedWrite,
ProgressiveScanWrite,
ImageTransformation
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
, TransformedByDefault
#endif
};
enum Transformation {
TransformationNone = 0,
TransformationMirror = 1,
TransformationFlip = 2,
TransformationRotate180 = TransformationMirror | TransformationFlip,
TransformationRotate90 = 4,
TransformationMirrorAndRotate90 = TransformationMirror | TransformationRotate90,
TransformationFlipAndRotate90 = TransformationFlip | TransformationRotate90,
TransformationRotate270 = TransformationRotate180 | TransformationRotate90
};
Q_DECLARE_FLAGS(Transformations, Transformation)
virtual QVariant option(ImageOption option) const;
virtual void setOption(ImageOption option, const QVariant &value);
virtual bool supportsOption(ImageOption option) const;
// incremental loading
virtual bool jumpToNextImage();
virtual bool jumpToImage(int imageNumber);
virtual int loopCount() const;
virtual int imageCount() const;
virtual int nextImageDelay() const;
virtual int currentImageNumber() const;
virtual QRect currentImageRect() const;
protected:
QImageIOHandler(QImageIOHandlerPrivate &dd);
QScopedPointer<QImageIOHandlerPrivate> d_ptr;
private:
Q_DISABLE_COPY(QImageIOHandler)
};
#ifndef QT_NO_IMAGEFORMATPLUGIN
#define QImageIOHandlerFactoryInterface_iid "org.qt-project.Qt.QImageIOHandlerFactoryInterface"
class Q_GUI_EXPORT QImageIOPlugin : public QObject
{
Q_OBJECT
public:
explicit QImageIOPlugin(QObject *parent = nullptr);
~QImageIOPlugin();
enum Capability {
CanRead = 0x1,
CanWrite = 0x2,
CanReadIncremental = 0x4
};
Q_DECLARE_FLAGS(Capabilities, Capability)
virtual Capabilities capabilities(QIODevice *device, const QByteArray &format) const = 0;
virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QImageIOPlugin::Capabilities)
#endif // QT_NO_IMAGEFORMATPLUGIN
QT_END_NAMESPACE
#endif // QIMAGEIOHANDLER_H
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