1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtWidgets module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QPIXMAPFILTER_H 41 #define QPIXMAPFILTER_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include <QtCore/qnamespace.h> 56 #include <QtGui/qpixmap.h> 57 #include <QtWidgets/qgraphicseffect.h> 58 59 QT_REQUIRE_CONFIG(graphicseffect); 60 61 QT_BEGIN_NAMESPACE 62 63 class QPainter; 64 class QPlatformPixmap; 65 66 class QPixmapFilterPrivate; 67 68 class Q_WIDGETS_EXPORT QPixmapFilter : public QObject 69 { 70 Q_OBJECT 71 Q_DECLARE_PRIVATE(QPixmapFilter) 72 public: 73 virtual ~QPixmapFilter() = 0; 74 75 enum FilterType { 76 ConvolutionFilter, 77 ColorizeFilter, 78 DropShadowFilter, 79 BlurFilter, 80 81 UserFilter = 1024 82 }; 83 84 FilterType type() const; 85 86 virtual QRectF boundingRectFor(const QRectF &rect) const; 87 88 virtual void draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &srcRect = QRectF()) const = 0; 89 90 protected: 91 QPixmapFilter(QPixmapFilterPrivate &d, FilterType type, QObject *parent); 92 QPixmapFilter(FilterType type, QObject *parent); 93 }; 94 95 class QPixmapConvolutionFilterPrivate; 96 97 class Q_WIDGETS_EXPORT QPixmapConvolutionFilter : public QPixmapFilter 98 { 99 Q_OBJECT 100 Q_DECLARE_PRIVATE(QPixmapConvolutionFilter) 101 102 public: 103 QPixmapConvolutionFilter(QObject *parent = nullptr); 104 ~QPixmapConvolutionFilter(); 105 106 void setConvolutionKernel(const qreal *matrix, int rows, int columns); 107 108 QRectF boundingRectFor(const QRectF &rect) const override; 109 void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const override; 110 111 private: 112 friend class QGLPixmapConvolutionFilter; 113 friend class QVGPixmapConvolutionFilter; 114 const qreal *convolutionKernel() const; 115 int rows() const; 116 int columns() const; 117 }; 118 119 class QPixmapBlurFilterPrivate; 120 121 class Q_WIDGETS_EXPORT QPixmapBlurFilter : public QPixmapFilter 122 { 123 Q_OBJECT 124 Q_DECLARE_PRIVATE(QPixmapBlurFilter) 125 126 public: 127 QPixmapBlurFilter(QObject *parent = nullptr); 128 ~QPixmapBlurFilter(); 129 130 void setRadius(qreal radius); 131 void setBlurHints(QGraphicsBlurEffect::BlurHints hints); 132 133 qreal radius() const; 134 QGraphicsBlurEffect::BlurHints blurHints() const; 135 136 QRectF boundingRectFor(const QRectF &rect) const override; 137 void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const override; 138 139 private: 140 friend class QGLPixmapBlurFilter; 141 }; 142 143 class QPixmapColorizeFilterPrivate; 144 145 class Q_WIDGETS_EXPORT QPixmapColorizeFilter : public QPixmapFilter 146 { 147 Q_OBJECT 148 Q_DECLARE_PRIVATE(QPixmapColorizeFilter) 149 150 public: 151 QPixmapColorizeFilter(QObject *parent = nullptr); 152 ~QPixmapColorizeFilter(); 153 154 void setColor(const QColor& color); 155 QColor color() const; 156 157 void setStrength(qreal strength); 158 qreal strength() const; 159 160 void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const override; 161 }; 162 163 class QPixmapDropShadowFilterPrivate; 164 165 class Q_WIDGETS_EXPORT QPixmapDropShadowFilter : public QPixmapFilter 166 { 167 Q_OBJECT 168 Q_DECLARE_PRIVATE(QPixmapDropShadowFilter) 169 170 public: 171 QPixmapDropShadowFilter(QObject *parent = nullptr); 172 ~QPixmapDropShadowFilter(); 173 174 QRectF boundingRectFor(const QRectF &rect) const override; 175 void draw(QPainter *p, const QPointF &pos, const QPixmap &px, const QRectF &src = QRectF()) const override; 176 177 qreal blurRadius() const; 178 void setBlurRadius(qreal radius); 179 180 QColor color() const; 181 void setColor(const QColor &color); 182 183 QPointF offset() const; 184 void setOffset(const QPointF &offset); setOffset(qreal dx,qreal dy)185 inline void setOffset(qreal dx, qreal dy) { setOffset(QPointF(dx, dy)); } 186 }; 187 188 QT_END_NAMESPACE 189 190 #endif // QPIXMAPFILTER_H 191