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41 
42 #ifndef QPIXMAPFILTER_H
43 #define QPIXMAPFILTER_H
44 
45 //
46 //  W A R N I N G
47 //  -------------
48 //
49 // This file is not part of the Qt API.  It exists purely as an
50 // implementation detail.  This header file may change from version to
51 // version without notice, or even be removed.
52 //
53 // We mean it.
54 //
55 
56 #include <QtCore/qnamespace.h>
57 #include <QtGui/qpixmap.h>
58 #include <QtGui/qgraphicseffect.h>
59 
60 #ifndef QT_NO_GRAPHICSEFFECT
61 QT_BEGIN_HEADER
62 
63 QT_BEGIN_NAMESPACE
64 
65 QT_MODULE(Gui)
66 
67 class QPainter;
68 class QPixmapData;
69 
70 class QPixmapFilterPrivate;
71 
72 class Q_GUI_EXPORT QPixmapFilter : public QObject
73 {
74     Q_OBJECT
75     Q_DECLARE_PRIVATE(QPixmapFilter)
76 public:
77     virtual ~QPixmapFilter() = 0;
78 
79     enum FilterType {
80         ConvolutionFilter,
81         ColorizeFilter,
82         DropShadowFilter,
83         BlurFilter,
84 
85         UserFilter = 1024
86     };
87 
88     FilterType type() const;
89 
90     virtual QRectF boundingRectFor(const QRectF &rect) const;
91 
92     virtual void draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &srcRect = QRectF()) const = 0;
93 
94 protected:
95     QPixmapFilter(QPixmapFilterPrivate &d, FilterType type, QObject *parent);
96     QPixmapFilter(FilterType type, QObject *parent);
97 };
98 
99 class QPixmapConvolutionFilterPrivate;
100 
101 class Q_GUI_EXPORT QPixmapConvolutionFilter : public QPixmapFilter
102 {
103     Q_OBJECT
104     Q_DECLARE_PRIVATE(QPixmapConvolutionFilter)
105 
106 public:
107     QPixmapConvolutionFilter(QObject *parent = 0);
108     ~QPixmapConvolutionFilter();
109 
110     void setConvolutionKernel(const qreal *matrix, int rows, int columns);
111 
112     QRectF boundingRectFor(const QRectF &rect) const;
113     void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const;
114 
115 private:
116     friend class QGLPixmapConvolutionFilter;
117     friend class QVGPixmapConvolutionFilter;
118     const qreal *convolutionKernel() const;
119     int rows() const;
120     int columns() const;
121 };
122 
123 class QPixmapBlurFilterPrivate;
124 
125 class Q_GUI_EXPORT QPixmapBlurFilter : public QPixmapFilter
126 {
127     Q_OBJECT
128     Q_DECLARE_PRIVATE(QPixmapBlurFilter)
129 
130 public:
131     QPixmapBlurFilter(QObject *parent = 0);
132     ~QPixmapBlurFilter();
133 
134     void setRadius(qreal radius);
135     void setBlurHints(QGraphicsBlurEffect::BlurHints hints);
136 
137     qreal radius() const;
138     QGraphicsBlurEffect::BlurHints blurHints() const;
139 
140     QRectF boundingRectFor(const QRectF &rect) const;
141     void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const;
142 
143 private:
144     friend class QGLPixmapBlurFilter;
145 };
146 
147 class QPixmapColorizeFilterPrivate;
148 
149 class Q_GUI_EXPORT QPixmapColorizeFilter : public QPixmapFilter
150 {
151     Q_OBJECT
152     Q_DECLARE_PRIVATE(QPixmapColorizeFilter)
153 
154 public:
155     QPixmapColorizeFilter(QObject *parent = 0);
156 
157     void setColor(const QColor& color);
158     QColor color() const;
159 
160     void setStrength(qreal strength);
161     qreal strength() const;
162 
163     void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const;
164 };
165 
166 class QPixmapDropShadowFilterPrivate;
167 
168 class Q_GUI_EXPORT QPixmapDropShadowFilter : public QPixmapFilter
169 {
170     Q_OBJECT
171     Q_DECLARE_PRIVATE(QPixmapDropShadowFilter)
172 
173 public:
174     QPixmapDropShadowFilter(QObject *parent = 0);
175     ~QPixmapDropShadowFilter();
176 
177     QRectF boundingRectFor(const QRectF &rect) const;
178     void draw(QPainter *p, const QPointF &pos, const QPixmap &px, const QRectF &src = QRectF()) const;
179 
180     qreal blurRadius() const;
181     void setBlurRadius(qreal radius);
182 
183     QColor color() const;
184     void setColor(const QColor &color);
185 
186     QPointF offset() const;
187     void setOffset(const QPointF &offset);
setOffset(qreal dx,qreal dy)188     inline void setOffset(qreal dx, qreal dy) { setOffset(QPointF(dx, dy)); }
189 };
190 
191 QT_END_NAMESPACE
192 
193 QT_END_HEADER
194 
195 #endif //QT_NO_GRAPHICSEFFECT
196 #endif // QPIXMAPFILTER_H
197