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
59QT_REQUIRE_CONFIG(graphicseffect);
60
61QT_BEGIN_NAMESPACE
62
63class QPainter;
64class QPlatformPixmap;
65
66class QPixmapFilterPrivate;
67
68class Q_WIDGETS_EXPORT QPixmapFilter : public QObject
69{
70 Q_OBJECT
71 Q_DECLARE_PRIVATE(QPixmapFilter)
72public:
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
90protected:
91 QPixmapFilter(QPixmapFilterPrivate &d, FilterType type, QObject *parent);
92 QPixmapFilter(FilterType type, QObject *parent);
93};
94
95class QPixmapConvolutionFilterPrivate;
96
97class Q_WIDGETS_EXPORT QPixmapConvolutionFilter : public QPixmapFilter
98{
99 Q_OBJECT
100 Q_DECLARE_PRIVATE(QPixmapConvolutionFilter)
101
102public:
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
111private:
112 friend class QGLPixmapConvolutionFilter;
113 friend class QVGPixmapConvolutionFilter;
114 const qreal *convolutionKernel() const;
115 int rows() const;
116 int columns() const;
117};
118
119class QPixmapBlurFilterPrivate;
120
121class Q_WIDGETS_EXPORT QPixmapBlurFilter : public QPixmapFilter
122{
123 Q_OBJECT
124 Q_DECLARE_PRIVATE(QPixmapBlurFilter)
125
126public:
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
139private:
140 friend class QGLPixmapBlurFilter;
141};
142
143class QPixmapColorizeFilterPrivate;
144
145class Q_WIDGETS_EXPORT QPixmapColorizeFilter : public QPixmapFilter
146{
147 Q_OBJECT
148 Q_DECLARE_PRIVATE(QPixmapColorizeFilter)
149
150public:
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
163class QPixmapDropShadowFilterPrivate;
164
165class Q_WIDGETS_EXPORT QPixmapDropShadowFilter : public QPixmapFilter
166{
167 Q_OBJECT
168 Q_DECLARE_PRIVATE(QPixmapDropShadowFilter)
169
170public:
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);
185 inline void setOffset(qreal dx, qreal dy) { setOffset(QPointF(dx, dy)); }
186};
187
188QT_END_NAMESPACE
189
190#endif // QPIXMAPFILTER_H
191

source code of qtbase/src/widgets/effects/qpixmapfilter_p.h