/usr/include/agg2/agg_span_interpolator_adaptor.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_SPAN_INTERPOLATOR_ADAPTOR_INCLUDED
#define AGG_SPAN_INTERPOLATOR_ADAPTOR_INCLUDED
#include "agg_basics.h"
namespace agg
{
//===============================================span_interpolator_adaptor
template<class Interpolator, class Distortion>
class span_interpolator_adaptor : public Interpolator
{
public:
typedef Interpolator base_type;
typedef typename base_type::trans_type trans_type;
typedef Distortion distortion_type;
//--------------------------------------------------------------------
span_interpolator_adaptor() {}
span_interpolator_adaptor(const trans_type& trans,
const distortion_type& dist) :
base_type(trans),
m_distortion(&dist)
{
}
//--------------------------------------------------------------------
span_interpolator_adaptor(const trans_type& trans,
const distortion_type& dist,
double x, double y, unsigned len) :
base_type(trans, x, y, len),
m_distortion(&dist)
{
}
//--------------------------------------------------------------------
const distortion_type& distortion() const
{
return *m_distortion;
}
//--------------------------------------------------------------------
void distortion(const distortion_type& dist)
{
m_distortion = dist;
}
//--------------------------------------------------------------------
void coordinates(int* x, int* y) const
{
base_type::coordinates(x, y);
m_distortion->calculate(x, y);
}
private:
//--------------------------------------------------------------------
const distortion_type* m_distortion;
};
}
#endif
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