/usr/include/marble/ClipPainter.h is in libmarble-dev 4:4.8.2-0ubuntu2.
This file is owned by root:root, with mode 0o644.
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// This file is part of the Marble Virtual Globe.
//
// This program is free software licensed under the GNU LGPL. You can
// find a copy of this license in LICENSE.txt in the top directory of
// the source code.
//
// Copyright 2006-2009 Torsten Rahn <tackat@kde.org>
// Copyright 2007 Inge Wallin <ingwa@kde.org>
//
#ifndef MARBLE_CLIPPAINTER_H
#define MARBLE_CLIPPAINTER_H
#include <QtCore/QPointF>
#include <QtGui/QPainter>
#include "marble_export.h"
#include "global.h"
class QPaintDevice;
class QPolygonF;
namespace Marble
{
/**
* @short A QPainter that does viewport clipping for polygons
*
* This class introduces fast polygon/polyline clipping for QPainter
* to increase the performance.
* Clipping is accomplished using an algorithm (by Torsten Rahn) that
* processes each polyline once.
* To keep things fast each possible scenario of two subsequent
* points is implemented case by case in a specialized handler which
* creates interpolated points and helper points.
*/
// The reason for this class is a terrible bug in some versions of the
// X Server. Suppose the widget size is, say, 1000 x 1000 and we have
// a high zoom so that we want to draw a vector from (-100000,
// -100000) to (100000, 100000). Then the X server will create a
// bitmap that is at least 100000 x 100000 and in the process eat all
// available memory.
//
// So we introduce the ClipPainter that clips all polylines and polygons
// to the area that is actually visible in the viewport.
//
// @internal
class ClipPainterPrivate;
class MARBLE_EXPORT ClipPainter : public QPainter
{
public:
ClipPainter();
ClipPainter(QPaintDevice*, bool);
~ClipPainter();
void setClipping( bool enable );
bool isClipping() const;
void drawPolygon( const QPolygonF &,
Qt::FillRule fillRule = Qt::OddEvenFill );
void drawPolyline( const QPolygonF & );
void drawPolyline( const QPolygonF &, QVector<QPointF>& labelNodes,
LabelPositionFlags labelPositionFlag = LineCenter );
// void clearNodeCount(){ m_debugNodeCount = 0; }
// int nodeCount(){ return m_debugNodeCount; }
private:
ClipPainterPrivate * const d;
};
}
#endif
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