/usr/include/mapnik/agg/agg_span_solid.h is in libmapnik-dev 2.2.0+ds1-7+b2.
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
//----------------------------------------------------------------------------
//
// span_solid_rgba8
//
//----------------------------------------------------------------------------
#ifndef AGG_SPAN_SOLID_INCLUDED
#define AGG_SPAN_SOLID_INCLUDED
#include "agg_basics.h"
namespace agg
{
//--------------------------------------------------------------span_solid
template<class ColorT> class span_solid
{
public:
typedef ColorT color_type;
//--------------------------------------------------------------------
void color(const color_type& c) { m_color = c; }
const color_type& color() const { return m_color; }
//--------------------------------------------------------------------
void prepare() {}
//--------------------------------------------------------------------
void generate(color_type* span, int x, int y, unsigned len)
{
do { *span++ = m_color; } while(--len);
}
private:
color_type m_color;
};
}
#endif
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