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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QIMAGEIOHANDLER_H
#define QIMAGEIOHANDLER_H
#include <QtGui/qtguiglobal.h>
#include <QtGui/qimage.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;
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
};
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;
static bool allocateImage(QSize size, QImage::Format format, QImage *image);
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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