/usr/include/mapnik/agg/agg_span_subdiv_adaptor.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.
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 | //----------------------------------------------------------------------------
// 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_SPAN_SUBDIV_ADAPTOR_INCLUDED
#define AGG_SPAN_SUBDIV_ADAPTOR_INCLUDED
#include "agg_basics.h"
namespace agg
{
//=================================================span_subdiv_adaptor
template<class Interpolator, unsigned SubpixelShift = 8>
class span_subdiv_adaptor
{
public:
typedef Interpolator interpolator_type;
typedef typename interpolator_type::trans_type trans_type;
enum sublixel_scale_e
{
subpixel_shift = SubpixelShift,
subpixel_scale = 1 << subpixel_shift
};
//----------------------------------------------------------------
span_subdiv_adaptor() :
m_subdiv_shift(4),
m_subdiv_size(1 << m_subdiv_shift),
m_subdiv_mask(m_subdiv_size - 1) {}
span_subdiv_adaptor(interpolator_type& interpolator,
unsigned subdiv_shift = 4) :
m_subdiv_shift(subdiv_shift),
m_subdiv_size(1 << m_subdiv_shift),
m_subdiv_mask(m_subdiv_size - 1),
m_interpolator(&interpolator) {}
span_subdiv_adaptor(interpolator_type& interpolator,
double x, double y, unsigned len,
unsigned subdiv_shift = 4) :
m_subdiv_shift(subdiv_shift),
m_subdiv_size(1 << m_subdiv_shift),
m_subdiv_mask(m_subdiv_size - 1),
m_interpolator(&interpolator)
{
begin(x, y, len);
}
//----------------------------------------------------------------
const interpolator_type& interpolator() const { return *m_interpolator; }
void interpolator(interpolator_type& intr) { m_interpolator = &intr; }
//----------------------------------------------------------------
const trans_type& transformer() const
{
return *m_interpolator->transformer();
}
void transformer(const trans_type& trans)
{
m_interpolator->transformer(trans);
}
//----------------------------------------------------------------
unsigned subdiv_shift() const { return m_subdiv_shift; }
void subdiv_shift(unsigned shift)
{
m_subdiv_shift = shift;
m_subdiv_size = 1 << m_subdiv_shift;
m_subdiv_mask = m_subdiv_size - 1;
}
//----------------------------------------------------------------
void begin(double x, double y, unsigned len)
{
m_pos = 1;
m_src_x = iround(x * subpixel_scale) + subpixel_scale;
m_src_y = y;
m_len = len;
if(len > m_subdiv_size) len = m_subdiv_size;
m_interpolator->begin(x, y, len);
}
//----------------------------------------------------------------
void operator++()
{
++(*m_interpolator);
if(m_pos >= m_subdiv_size)
{
unsigned len = m_len;
if(len > m_subdiv_size) len = m_subdiv_size;
m_interpolator->resynchronize(double(m_src_x) / double(subpixel_scale) + len,
m_src_y,
len);
m_pos = 0;
}
m_src_x += subpixel_scale;
++m_pos;
--m_len;
}
//----------------------------------------------------------------
void coordinates(int* x, int* y) const
{
m_interpolator->coordinates(x, y);
}
//----------------------------------------------------------------
void local_scale(int* x, int* y) const
{
m_interpolator->local_scale(x, y);
}
private:
unsigned m_subdiv_shift;
unsigned m_subdiv_size;
unsigned m_subdiv_mask;
interpolator_type* m_interpolator;
int m_src_x;
double m_src_y;
unsigned m_pos;
unsigned m_len;
};
}
#endif
|