/usr/include/agg2/agg_conv_adaptor_vpgen.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | //----------------------------------------------------------------------------
// 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_CONV_ADAPTOR_VPGEN_INCLUDED
#define AGG_CONV_ADAPTOR_VPGEN_INCLUDED
#include "agg_basics.h"
namespace agg
{
//======================================================conv_adaptor_vpgen
template<class VertexSource, class VPGen> class conv_adaptor_vpgen
{
public:
explicit conv_adaptor_vpgen(VertexSource& source) : m_source(&source) {}
void attach(VertexSource& source) { m_source = &source; }
VPGen& vpgen() { return m_vpgen; }
const VPGen& vpgen() const { return m_vpgen; }
void rewind(unsigned path_id);
unsigned vertex(double* x, double* y);
private:
conv_adaptor_vpgen(const conv_adaptor_vpgen<VertexSource, VPGen>&);
const conv_adaptor_vpgen<VertexSource, VPGen>&
operator = (const conv_adaptor_vpgen<VertexSource, VPGen>&);
VertexSource* m_source;
VPGen m_vpgen;
double m_start_x;
double m_start_y;
unsigned m_poly_flags;
int m_vertices;
};
//------------------------------------------------------------------------
template<class VertexSource, class VPGen>
void conv_adaptor_vpgen<VertexSource, VPGen>::rewind(unsigned path_id)
{
m_source->rewind(path_id);
m_vpgen.reset();
m_start_x = 0;
m_start_y = 0;
m_poly_flags = 0;
m_vertices = 0;
}
//------------------------------------------------------------------------
template<class VertexSource, class VPGen>
unsigned conv_adaptor_vpgen<VertexSource, VPGen>::vertex(double* x, double* y)
{
unsigned cmd = path_cmd_stop;
for(;;)
{
cmd = m_vpgen.vertex(x, y);
if(!is_stop(cmd)) break;
if(m_poly_flags && !m_vpgen.auto_unclose())
{
*x = 0.0;
*y = 0.0;
cmd = m_poly_flags;
m_poly_flags = 0;
break;
}
if(m_vertices < 0)
{
if(m_vertices < -1)
{
m_vertices = 0;
return path_cmd_stop;
}
m_vpgen.move_to(m_start_x, m_start_y);
m_vertices = 1;
continue;
}
double tx, ty;
cmd = m_source->vertex(&tx, &ty);
if(is_vertex(cmd))
{
if(is_move_to(cmd))
{
if(m_vpgen.auto_close() && m_vertices > 2)
{
m_vpgen.line_to(m_start_x, m_start_y);
m_poly_flags = path_cmd_end_poly | path_flags_close;
m_start_x = tx;
m_start_y = ty;
m_vertices = -1;
continue;
}
m_vpgen.move_to(tx, ty);
m_start_x = tx;
m_start_y = ty;
m_vertices = 1;
}
else
{
m_vpgen.line_to(tx, ty);
++m_vertices;
}
}
else
{
if(is_end_poly(cmd))
{
m_poly_flags = cmd;
if(is_closed(cmd) || m_vpgen.auto_close())
{
if(m_vpgen.auto_close()) m_poly_flags |= path_flags_close;
if(m_vertices > 2)
{
m_vpgen.line_to(m_start_x, m_start_y);
}
m_vertices = 0;
}
}
else
{
// path_cmd_stop
if(m_vpgen.auto_close() && m_vertices > 2)
{
m_vpgen.line_to(m_start_x, m_start_y);
m_poly_flags = path_cmd_end_poly | path_flags_close;
m_vertices = -2;
continue;
}
break;
}
}
}
return cmd;
}
}
#endif
|