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39
40#ifndef QIMAGEIOHANDLER_H
41#define QIMAGEIOHANDLER_H
42
43#include <QtGui/qtguiglobal.h>
44#include <QtGui/qimage.h>
45#include <QtCore/qiodevice.h>
46#include <QtCore/qplugin.h>
47#include <QtCore/qfactoryinterface.h>
48#include <QtCore/qscopedpointer.h>
49
50QT_BEGIN_NAMESPACE
51
52
53class QImage;
54class QRect;
55class QSize;
56class QVariant;
57
58class QImageIOHandlerPrivate;
59class Q_GUI_EXPORT QImageIOHandler
60{
61 Q_DECLARE_PRIVATE(QImageIOHandler)
62public:
63 QImageIOHandler();
64 virtual ~QImageIOHandler();
65
66 void setDevice(QIODevice *device);
67 QIODevice *device() const;
68
69 void setFormat(const QByteArray &format);
70 void setFormat(const QByteArray &format) const;
71 QByteArray format() const;
72
73 virtual bool canRead() const = 0;
74 virtual bool read(QImage *image) = 0;
75 virtual bool write(const QImage &image);
76
77 enum ImageOption {
78 Size,
79 ClipRect,
80 Description,
81 ScaledClipRect,
82 ScaledSize,
83 CompressionRatio,
84 Gamma,
85 Quality,
86 Name,
87 SubType,
88 IncrementalReading,
89 Endianness,
90 Animation,
91 BackgroundColor,
92 ImageFormat,
93 SupportedSubTypes,
94 OptimizedWrite,
95 ProgressiveScanWrite,
96 ImageTransformation
97#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
98 , TransformedByDefault
99#endif
100 };
101
102 enum Transformation {
103 TransformationNone = 0,
104 TransformationMirror = 1,
105 TransformationFlip = 2,
106 TransformationRotate180 = TransformationMirror | TransformationFlip,
107 TransformationRotate90 = 4,
108 TransformationMirrorAndRotate90 = TransformationMirror | TransformationRotate90,
109 TransformationFlipAndRotate90 = TransformationFlip | TransformationRotate90,
110 TransformationRotate270 = TransformationRotate180 | TransformationRotate90
111 };
112 Q_DECLARE_FLAGS(Transformations, Transformation)
113
114 virtual QVariant option(ImageOption option) const;
115 virtual void setOption(ImageOption option, const QVariant &value);
116 virtual bool supportsOption(ImageOption option) const;
117
118 // incremental loading
119 virtual bool jumpToNextImage();
120 virtual bool jumpToImage(int imageNumber);
121 virtual int loopCount() const;
122 virtual int imageCount() const;
123 virtual int nextImageDelay() const;
124 virtual int currentImageNumber() const;
125 virtual QRect currentImageRect() const;
126
127 static bool allocateImage(QSize size, QImage::Format format, QImage *image);
128
129protected:
130 QImageIOHandler(QImageIOHandlerPrivate &dd);
131 QScopedPointer<QImageIOHandlerPrivate> d_ptr;
132private:
133 Q_DISABLE_COPY(QImageIOHandler)
134};
135
136#ifndef QT_NO_IMAGEFORMATPLUGIN
137
138#define QImageIOHandlerFactoryInterface_iid "org.qt-project.Qt.QImageIOHandlerFactoryInterface"
139
140class Q_GUI_EXPORT QImageIOPlugin : public QObject
141{
142 Q_OBJECT
143public:
144 explicit QImageIOPlugin(QObject *parent = nullptr);
145 ~QImageIOPlugin();
146
147 enum Capability {
148 CanRead = 0x1,
149 CanWrite = 0x2,
150 CanReadIncremental = 0x4
151 };
152 Q_DECLARE_FLAGS(Capabilities, Capability)
153
154 virtual Capabilities capabilities(QIODevice *device, const QByteArray &format) const = 0;
155 virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0;
156};
157
158Q_DECLARE_OPERATORS_FOR_FLAGS(QImageIOPlugin::Capabilities)
159
160#endif // QT_NO_IMAGEFORMATPLUGIN
161
162QT_END_NAMESPACE
163
164#endif // QIMAGEIOHANDLER_H
165