/usr/include/agg2/agg_vpgen_clip_polygon.h is in libagg-dev 2.5+dfsg1-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Anti-Grain Geometry (AGG) - Version 2.5
// A high quality rendering engine for C++
// Copyright (C) 2002-2006 Maxim Shemanarev
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://antigrain.com
//
// AGG is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// AGG is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with AGG; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
// MA 02110-1301, USA.
//----------------------------------------------------------------------------
#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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