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9 ** GNU Lesser General Public License Usage
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21 ** GNU General Public License Usage
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40 ****************************************************************************/
42 #ifndef QPAINTENGINE_P_H
43 #define QPAINTENGINE_P_H
49 // This file is not part of the Qt API. It exists for the convenience
50 // of other Qt classes. This header file may change from version to
51 // version without notice, or even be removed.
56 #include "QtGui/qpainter.h"
57 #include "QtGui/qpaintengine.h"
58 #include "QtGui/qregion.h"
59 #include "private/qobject_p.h"
65 class Q_GUI_EXPORT QPaintEnginePrivate
67 Q_DECLARE_PUBLIC(QPaintEngine)
69 QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipDevice(0), hasSystemTransform(0),
70 hasSystemViewport(0) {}
71 virtual ~QPaintEnginePrivate() { }
76 QRegion systemViewport;
77 QTransform systemTransform;
78 QPaintDevice *currentClipDevice;
79 uint hasSystemTransform : 1;
80 uint hasSystemViewport : 1;
82 inline void transformSystemClip()
84 if (systemClip.isEmpty())
87 if (hasSystemTransform) {
88 if (systemTransform.type() <= QTransform::TxTranslate)
89 systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy()));
91 systemClip = systemTransform.map(systemClip);
94 // Make sure we're inside the viewport.
95 if (hasSystemViewport) {
96 systemClip &= systemViewport;
97 if (systemClip.isEmpty()) {
98 // We don't want to paint without system clip, so set it to 1 pixel :)
99 systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1));
104 inline void setSystemTransform(const QTransform &xform)
106 systemTransform = xform;
107 if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport)
108 transformSystemClip();
109 systemStateChanged();
112 inline void setSystemViewport(const QRegion ®ion)
114 systemViewport = region;
115 hasSystemViewport = !systemViewport.isEmpty();
118 virtual void systemStateChanged() { }
120 void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti);
125 #endif // QPAINTENGINE_P_H