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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QIMAGEIOHANDLER_H |
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43 #define QIMAGEIOHANDLER_H |
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44 |
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45 #include <QtCore/qplugin.h> |
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46 #include <QtCore/qfactoryinterface.h> |
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47 #include <QtCore/qscopedpointer.h> |
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48 |
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49 QT_BEGIN_HEADER |
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50 |
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51 QT_BEGIN_NAMESPACE |
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52 |
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53 QT_MODULE(Gui) |
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54 |
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55 class QImage; |
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56 class QRect; |
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57 class QSize; |
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58 class QVariant; |
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59 |
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60 class QImageIOHandlerPrivate; |
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61 class Q_GUI_EXPORT QImageIOHandler |
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62 { |
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63 Q_DECLARE_PRIVATE(QImageIOHandler) |
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64 public: |
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65 QImageIOHandler(); |
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66 virtual ~QImageIOHandler(); |
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67 |
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68 void setDevice(QIODevice *device); |
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69 QIODevice *device() const; |
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70 |
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71 void setFormat(const QByteArray &format); |
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72 void setFormat(const QByteArray &format) const; |
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73 QByteArray format() const; |
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74 |
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75 virtual QByteArray name() const; |
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76 |
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77 virtual bool canRead() const = 0; |
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78 virtual bool read(QImage *image) = 0; |
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79 virtual bool write(const QImage &image); |
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80 |
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81 enum ImageOption { |
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82 Size, |
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83 ClipRect, |
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84 Description, |
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85 ScaledClipRect, |
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86 ScaledSize, |
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87 CompressionRatio, |
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88 Gamma, |
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89 Quality, |
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90 Name, |
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91 SubType, |
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92 IncrementalReading, |
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93 Endianness, |
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94 Animation, |
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95 BackgroundColor, |
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96 ImageFormat |
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97 }; |
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98 virtual QVariant option(ImageOption option) const; |
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99 virtual void setOption(ImageOption option, const QVariant &value); |
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100 virtual bool supportsOption(ImageOption option) const; |
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101 |
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102 // incremental loading |
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103 virtual bool jumpToNextImage(); |
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104 virtual bool jumpToImage(int imageNumber); |
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105 virtual int loopCount() const; |
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106 virtual int imageCount() const; |
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107 virtual int nextImageDelay() const; |
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108 virtual int currentImageNumber() const; |
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109 virtual QRect currentImageRect() const; |
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110 |
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111 protected: |
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112 QImageIOHandler(QImageIOHandlerPrivate &dd); |
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113 QScopedPointer<QImageIOHandlerPrivate> d_ptr; |
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114 private: |
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115 Q_DISABLE_COPY(QImageIOHandler) |
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116 }; |
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117 |
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118 struct Q_GUI_EXPORT QImageIOHandlerFactoryInterface : public QFactoryInterface |
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119 { |
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120 virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0; |
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121 }; |
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122 |
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123 #define QImageIOHandlerFactoryInterface_iid "com.trolltech.Qt.QImageIOHandlerFactoryInterface" |
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124 Q_DECLARE_INTERFACE(QImageIOHandlerFactoryInterface, QImageIOHandlerFactoryInterface_iid) |
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125 |
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126 class Q_GUI_EXPORT QImageIOPlugin : public QObject, public QImageIOHandlerFactoryInterface |
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127 { |
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128 Q_OBJECT |
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129 Q_INTERFACES(QImageIOHandlerFactoryInterface:QFactoryInterface) |
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130 public: |
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131 explicit QImageIOPlugin(QObject *parent = 0); |
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132 virtual ~QImageIOPlugin(); |
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133 |
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134 enum Capability { |
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135 CanRead = 0x1, |
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136 CanWrite = 0x2, |
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137 CanReadIncremental = 0x4 |
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138 }; |
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139 Q_DECLARE_FLAGS(Capabilities, Capability) |
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140 |
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141 virtual Capabilities capabilities(QIODevice *device, const QByteArray &format) const = 0; |
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142 virtual QStringList keys() const = 0; |
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143 virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0; |
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144 }; |
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145 |
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146 Q_DECLARE_OPERATORS_FOR_FLAGS(QImageIOPlugin::Capabilities) |
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147 |
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148 QT_END_NAMESPACE |
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149 |
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150 QT_END_HEADER |
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151 |
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152 #endif // QIMAGEIOHANDLER_H |