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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://www.antigrain.com
//----------------------------------------------------------------------------
#ifndef AGG_VPGEN_CLIP_POLYGON_INCLUDED
#define AGG_VPGEN_CLIP_POLYGON_INCLUDED
#include "agg_basics.h"
namespace agg
{
//======================================================vpgen_clip_polygon
//
// See Implementation agg_vpgen_clip_polygon.cpp
//
class vpgen_clip_polygon
{
public:
vpgen_clip_polygon() :
m_clip_box(0, 0, 1, 1),
m_x1(0),
m_y1(0),
m_clip_flags(0),
m_num_vertices(0),
m_vertex(0),
m_cmd(path_cmd_move_to)
{
}
void clip_box(double _x1, double _y1, double _x2, double _y2)
{
m_clip_box.x1 = _x1;
m_clip_box.y1 = _y1;
m_clip_box.x2 = _x2;
m_clip_box.y2 = _y2;
m_clip_box.normalize();
}
double x1() const { return m_clip_box.x1; }
double y1() const { return m_clip_box.y1; }
double x2() const { return m_clip_box.x2; }
double y2() const { return m_clip_box.y2; }
static bool auto_close() { return true; }
static bool auto_unclose() { return false; }
void reset();
void move_to(double x, double y);
void line_to(double x, double y);
unsigned vertex(double* x, double* y);
private:
unsigned clipping_flags(double x, double y);
private:
rect_d m_clip_box;
double m_x1;
double m_y1;
unsigned m_clip_flags;
double m_x[4];
double m_y[4];
unsigned m_num_vertices;
unsigned m_vertex;
unsigned m_cmd;
};
}
#endif
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