/usr/include/mapnik/agg/agg_conv_concat.h is in libmapnik-dev 2.2.0+ds1-6build2.
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 - Version 2.4
// 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_CONV_CONCAT_INCLUDED
#define AGG_CONV_CONCAT_INCLUDED
#include "agg_basics.h"
namespace agg
{
//=============================================================conv_concat
// Concatenation of two paths. Usually used to combine lines or curves
// with markers such as arrowheads
template<class VS1, class VS2> class conv_concat
{
public:
conv_concat(VS1& source1, VS2& source2) :
m_source1(&source1), m_source2(&source2), m_status(2) {}
void attach1(VS1& source) { m_source1 = &source; }
void attach2(VS2& source) { m_source2 = &source; }
void rewind(unsigned path_id)
{
m_source1->rewind(path_id);
m_source2->rewind(0);
m_status = 0;
}
unsigned vertex(double* x, double* y)
{
unsigned cmd;
if(m_status == 0)
{
cmd = m_source1->vertex(x, y);
if(!is_stop(cmd)) return cmd;
m_status = 1;
}
if(m_status == 1)
{
cmd = m_source2->vertex(x, y);
if(!is_stop(cmd)) return cmd;
m_status = 2;
}
return path_cmd_stop;
}
private:
conv_concat(const conv_concat<VS1, VS2>&);
const conv_concat<VS1, VS2>&
operator = (const conv_concat<VS1, VS2>&);
VS1* m_source1;
VS2* m_source2;
int m_status;
};
}
#endif
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