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mapnik/agg/include/agg_renderer_outline_aa.h

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new build system
2006-01-31 23:09:52 +00:00
//----------------------------------------------------------------------------
// 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_RENDERER_OUTLINE_AA_INCLUDED
#define AGG_RENDERER_OUTLINE_AA_INCLUDED
1.upgrade to latest agg2.4 2.added default PointSymbolizer in load_map.cpp
2006-11-09 23:44:34 +00:00
#include "agg_array.h"
new build system
2006-01-31 23:09:52 +00:00
#include "agg_math.h"
#include "agg_line_aa_basics.h"
#include "agg_dda_line.h"
#include "agg_ellipse_bresenham.h"
#include "agg_renderer_base.h"
#include "agg_gamma_functions.h"
#include "agg_clip_liang_barsky.h"
namespace agg
{
//===================================================distance_interpolator0
class distance_interpolator0
{
public:
//---------------------------------------------------------------------
distance_interpolator0() {}
distance_interpolator0(int x1, int y1, int x2, int y2, int x, int y) :
m_dx(line_mr(x2) - line_mr(x1)),
m_dy(line_mr(y2) - line_mr(y1)),
m_dist((line_mr(x + line_subpixel_scale/2) - line_mr(x2)) * m_dy -
(line_mr(y + line_subpixel_scale/2) - line_mr(y2)) * m_dx)
{
m_dx <<= line_mr_subpixel_shift;
m_dy <<= line_mr_subpixel_shift;
}
//---------------------------------------------------------------------
void inc_x() { m_dist += m_dy; }
int dist() const { return m_dist; }
private:
//---------------------------------------------------------------------
int m_dx;
int m_dy;
int m_dist;
};
//==================================================distance_interpolator00
class distance_interpolator00
{
public:
//---------------------------------------------------------------------
distance_interpolator00() {}
distance_interpolator00(int xc, int yc,
int x1, int y1, int x2, int y2,
int x, int y) :
m_dx1(line_mr(x1) - line_mr(xc)),
m_dy1(line_mr(y1) - line_mr(yc)),
m_dx2(line_mr(x2) - line_mr(xc)),
m_dy2(line_mr(y2) - line_mr(yc)),
m_dist1((line_mr(x + line_subpixel_scale/2) - line_mr(x1)) * m_dy1 -
(line_mr(y + line_subpixel_scale/2) - line_mr(y1)) * m_dx1),
m_dist2((line_mr(x + line_subpixel_scale/2) - line_mr(x2)) * m_dy2 -
(line_mr(y + line_subpixel_scale/2) - line_mr(y2)) * m_dx2)
{
m_dx1 <<= line_mr_subpixel_shift;
m_dy1 <<= line_mr_subpixel_shift;
m_dx2 <<= line_mr_subpixel_shift;
m_dy2 <<= line_mr_subpixel_shift;
}
//---------------------------------------------------------------------
void inc_x() { m_dist1 += m_dy1; m_dist2 += m_dy2; }
int dist1() const { return m_dist1; }
int dist2() const { return m_dist2; }
private:
//---------------------------------------------------------------------
int m_dx1;
int m_dy1;
int m_dx2;
int m_dy2;
int m_dist1;
int m_dist2;
};
//===================================================distance_interpolator1
class distance_interpolator1
{
public:
//---------------------------------------------------------------------
distance_interpolator1() {}
distance_interpolator1(int x1, int y1, int x2, int y2, int x, int y) :
m_dx(x2 - x1),
m_dy(y2 - y1),
m_dist(iround(double(x + line_subpixel_scale/2 - x2) * double(m_dy) -
double(y + line_subpixel_scale/2 - y2) * double(m_dx)))
{
m_dx <<= line_subpixel_shift;
m_dy <<= line_subpixel_shift;
}
//---------------------------------------------------------------------
void inc_x() { m_dist += m_dy; }
void dec_x() { m_dist -= m_dy; }
void inc_y() { m_dist -= m_dx; }
void dec_y() { m_dist += m_dx; }
//---------------------------------------------------------------------
void inc_x(int dy)
{
m_dist += m_dy;
if(dy > 0) m_dist -= m_dx;
if(dy < 0) m_dist += m_dx;
}
//---------------------------------------------------------------------
void dec_x(int dy)
{
m_dist -= m_dy;
if(dy > 0) m_dist -= m_dx;
if(dy < 0) m_dist += m_dx;
}
//---------------------------------------------------------------------
void inc_y(int dx)
{
m_dist -= m_dx;
if(dx > 0) m_dist += m_dy;
if(dx < 0) m_dist -= m_dy;
}
void dec_y(int dx)
//---------------------------------------------------------------------
{
m_dist += m_dx;
if(dx > 0) m_dist += m_dy;
if(dx < 0) m_dist -= m_dy;
}
//---------------------------------------------------------------------
int dist() const { return m_dist; }
int dx() const { return m_dx; }
int dy() const { return m_dy; }
private:
//---------------------------------------------------------------------
int m_dx;
int m_dy;
int m_dist;
};
//===================================================distance_interpolator2
class distance_interpolator2
{
public:
//---------------------------------------------------------------------
distance_interpolator2() {}
distance_interpolator2(int x1, int y1, int x2, int y2,
int sx, int sy, int x, int y) :
m_dx(x2 - x1),
m_dy(y2 - y1),
m_dx_start(line_mr(sx) - line_mr(x1)),
m_dy_start(line_mr(sy) - line_mr(y1)),
m_dist(iround(double(x + line_subpixel_scale/2 - x2) * double(m_dy) -
double(y + line_subpixel_scale/2 - y2) * double(m_dx))),
m_dist_start((line_mr(x + line_subpixel_scale/2) - line_mr(sx)) * m_dy_start -
(line_mr(y + line_subpixel_scale/2) - line_mr(sy)) * m_dx_start)
{
m_dx <<= line_subpixel_shift;
m_dy <<= line_subpixel_shift;
m_dx_start <<= line_mr_subpixel_shift;
m_dy_start <<= line_mr_subpixel_shift;
}
distance_interpolator2(int x1, int y1, int x2, int y2,
int ex, int ey, int x, int y, int) :
m_dx(x2 - x1),
m_dy(y2 - y1),
m_dx_start(line_mr(ex) - line_mr(x2)),
m_dy_start(line_mr(ey) - line_mr(y2)),
m_dist(iround(double(x + line_subpixel_scale/2 - x2) * double(m_dy) -
double(y + line_subpixel_scale/2 - y2) * double(m_dx))),
m_dist_start((line_mr(x + line_subpixel_scale/2) - line_mr(ex)) * m_dy_start -
(line_mr(y + line_subpixel_scale/2) - line_mr(ey)) * m_dx_start)
{
m_dx <<= line_subpixel_shift;
m_dy <<= line_subpixel_shift;
m_dx_start <<= line_mr_subpixel_shift;
m_dy_start <<= line_mr_subpixel_shift;
}
//---------------------------------------------------------------------
void inc_x() { m_dist += m_dy; m_dist_start += m_dy_start; }
void dec_x() { m_dist -= m_dy; m_dist_start -= m_dy_start; }
void inc_y() { m_dist -= m_dx; m_dist_start -= m_dx_start; }
void dec_y() { m_dist += m_dx; m_dist_start += m_dx_start; }
//---------------------------------------------------------------------
void inc_x(int dy)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
if(dy > 0)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
}
if(dy < 0)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
}
}
//---------------------------------------------------------------------
void dec_x(int dy)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
if(dy > 0)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
}
if(dy < 0)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
}
}
//---------------------------------------------------------------------
void inc_y(int dx)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
if(dx > 0)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
}
if(dx < 0)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
}
}
//---------------------------------------------------------------------
void dec_y(int dx)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
if(dx > 0)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
}
if(dx < 0)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
}
}
//---------------------------------------------------------------------
int dist() const { return m_dist; }
int dist_start() const { return m_dist_start; }
int dist_end() const { return m_dist_start; }
//---------------------------------------------------------------------
int dx() const { return m_dx; }
int dy() const { return m_dy; }
int dx_start() const { return m_dx_start; }
int dy_start() const { return m_dy_start; }
int dx_end() const { return m_dx_start; }
int dy_end() const { return m_dy_start; }
private:
//---------------------------------------------------------------------
int m_dx;
int m_dy;
int m_dx_start;
int m_dy_start;
int m_dist;
int m_dist_start;
};
//===================================================distance_interpolator3
class distance_interpolator3
{
public:
//---------------------------------------------------------------------
distance_interpolator3() {}
distance_interpolator3(int x1, int y1, int x2, int y2,
int sx, int sy, int ex, int ey,
int x, int y) :
m_dx(x2 - x1),
m_dy(y2 - y1),
m_dx_start(line_mr(sx) - line_mr(x1)),
m_dy_start(line_mr(sy) - line_mr(y1)),
m_dx_end(line_mr(ex) - line_mr(x2)),
m_dy_end(line_mr(ey) - line_mr(y2)),
m_dist(iround(double(x + line_subpixel_scale/2 - x2) * double(m_dy) -
double(y + line_subpixel_scale/2 - y2) * double(m_dx))),
m_dist_start((line_mr(x + line_subpixel_scale/2) - line_mr(sx)) * m_dy_start -
(line_mr(y + line_subpixel_scale/2) - line_mr(sy)) * m_dx_start),
m_dist_end((line_mr(x + line_subpixel_scale/2) - line_mr(ex)) * m_dy_end -
(line_mr(y + line_subpixel_scale/2) - line_mr(ey)) * m_dx_end)
{
m_dx <<= line_subpixel_shift;
m_dy <<= line_subpixel_shift;
m_dx_start <<= line_mr_subpixel_shift;
m_dy_start <<= line_mr_subpixel_shift;
m_dx_end <<= line_mr_subpixel_shift;
m_dy_end <<= line_mr_subpixel_shift;
}
//---------------------------------------------------------------------
void inc_x() { m_dist += m_dy; m_dist_start += m_dy_start; m_dist_end += m_dy_end; }
void dec_x() { m_dist -= m_dy; m_dist_start -= m_dy_start; m_dist_end -= m_dy_end; }
void inc_y() { m_dist -= m_dx; m_dist_start -= m_dx_start; m_dist_end -= m_dx_end; }
void dec_y() { m_dist += m_dx; m_dist_start += m_dx_start; m_dist_end += m_dx_end; }
//---------------------------------------------------------------------
void inc_x(int dy)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
m_dist_end += m_dy_end;
if(dy > 0)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
m_dist_end -= m_dx_end;
}
if(dy < 0)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
m_dist_end += m_dx_end;
}
}
//---------------------------------------------------------------------
void dec_x(int dy)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
m_dist_end -= m_dy_end;
if(dy > 0)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
m_dist_end -= m_dx_end;
}
if(dy < 0)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
m_dist_end += m_dx_end;
}
}
//---------------------------------------------------------------------
void inc_y(int dx)
{
m_dist -= m_dx;
m_dist_start -= m_dx_start;
m_dist_end -= m_dx_end;
if(dx > 0)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
m_dist_end += m_dy_end;
}
if(dx < 0)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
m_dist_end -= m_dy_end;
}
}
//---------------------------------------------------------------------
void dec_y(int dx)
{
m_dist += m_dx;
m_dist_start += m_dx_start;
m_dist_end += m_dx_end;
if(dx > 0)
{
m_dist += m_dy;
m_dist_start += m_dy_start;
m_dist_end += m_dy_end;
}
if(dx < 0)
{
m_dist -= m_dy;
m_dist_start -= m_dy_start;
m_dist_end -= m_dy_end;
}
}
//---------------------------------------------------------------------
int dist() const { return m_dist; }
int dist_start() const { return m_dist_start; }
int dist_end() const { return m_dist_end; }
//---------------------------------------------------------------------
int dx() const { return m_dx; }
int dy() const { return m_dy; }
int dx_start() const { return m_dx_start; }
int dy_start() const { return m_dy_start; }
int dx_end() const { return m_dx_end; }
int dy_end() const { return m_dy_end; }
private:
//---------------------------------------------------------------------
int m_dx;
int m_dy;
int m_dx_start;
int m_dy_start;
int m_dx_end;
int m_dy_end;
int m_dist;
int m_dist_start;
int m_dist_end;
};
//================================================line_interpolator_aa_base
template<class Renderer> class line_interpolator_aa_base
{
public:
typedef Renderer renderer_type;
typedef typename Renderer::color_type color_type;
//---------------------------------------------------------------------
enum max_half_width_e
{
max_half_width = 64
};
//---------------------------------------------------------------------
line_interpolator_aa_base(renderer_type& ren, const line_parameters& lp) :
m_lp(&lp),
m_li(lp.vertical ? line_dbl_hr(lp.x2 - lp.x1) :
line_dbl_hr(lp.y2 - lp.y1),
lp.vertical ? abs(lp.y2 - lp.y1) :
abs(lp.x2 - lp.x1) + 1),
m_ren(ren),
m_len((lp.vertical == (lp.inc > 0)) ? -lp.len : lp.len),
m_x(lp.x1 >> line_subpixel_shift),
m_y(lp.y1 >> line_subpixel_shift),
m_old_x(m_x),
m_old_y(m_y),
m_count((lp.vertical ? abs((lp.y2 >> line_subpixel_shift) - m_y) :
abs((lp.x2 >> line_subpixel_shift) - m_x))),
m_width(ren.subpixel_width()),
//m_max_extent(m_width >> (line_subpixel_shift - 2)),
m_max_extent((m_width + line_subpixel_mask) >> line_subpixel_shift),
m_step(0)
{
agg::dda2_line_interpolator li(0, lp.vertical ?
(lp.dy << agg::line_subpixel_shift) :
(lp.dx << agg::line_subpixel_shift),
lp.len);
unsigned i;
int stop = m_width + line_subpixel_scale * 2;
for(i = 0; i < max_half_width; ++i)
{
m_dist[i] = li.y();
if(m_dist[i] >= stop) break;
++li;
}
m_dist[i++] = 0x7FFF0000;
}
//---------------------------------------------------------------------
template<class DI> int step_hor_base(DI& di)
{
++m_li;
m_x += m_lp->inc;
m_y = (m_lp->y1 + m_li.y()) >> line_subpixel_shift;
if(m_lp->inc > 0) di.inc_x(m_y - m_old_y);
else di.dec_x(m_y - m_old_y);
m_old_y = m_y;
return di.dist() / m_len;
}
//---------------------------------------------------------------------
template<class DI> int step_ver_base(DI& di)
{
++m_li;
m_y += m_lp->inc;
m_x = (m_lp->x1 + m_li.y()) >> line_subpixel_shift;
if(m_lp->inc > 0) di.inc_y(m_x - m_old_x);
else di.dec_y(m_x - m_old_x);
m_old_x = m_x;
return di.dist() / m_len;
}
//---------------------------------------------------------------------
bool vertical() const { return m_lp->vertical; }
int width() const { return m_width; }
int count() const { return m_count; }
private:
line_interpolator_aa_base(const line_interpolator_aa_base<Renderer>&);
const line_interpolator_aa_base<Renderer>&
operator = (const line_interpolator_aa_base<Renderer>&);
protected:
const line_parameters* m_lp;
dda2_line_interpolator m_li;
renderer_type& m_ren;
int m_len;
int m_x;
int m_y;
int m_old_x;
int m_old_y;
int m_count;
int m_width;
int m_max_extent;
int m_step;
int m_dist[max_half_width + 1];
cover_type m_covers[max_half_width * 2 + 4];
};
//====================================================line_interpolator_aa0
template<class Renderer> class line_interpolator_aa0 :
public line_interpolator_aa_base<Renderer>
{
public:
typedef Renderer renderer_type;
typedef typename Renderer::color_type color_type;
typedef line_interpolator_aa_base<Renderer> base_type;
//---------------------------------------------------------------------
line_interpolator_aa0(renderer_type& ren, const line_parameters& lp) :
line_interpolator_aa_base<Renderer>(ren, lp),
m_di(lp.x1, lp.y1, lp.x2, lp.y2,
lp.x1 & ~line_subpixel_mask, lp.y1 & ~line_subpixel_mask)
{
base_type::m_li.adjust_forward();
}
//---------------------------------------------------------------------
bool step_hor()
{
int dist;
int dy;
int s1 = base_type::step_hor_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
*p1++ = (cover_type)base_type::m_ren.cover(s1);
dy = 1;
while((dist = base_type::m_dist[dy] - s1) <= base_type::m_width)
{
*p1++ = (cover_type)base_type::m_ren.cover(dist);
++dy;
}
dy = 1;
while((dist = base_type::m_dist[dy] + s1) <= base_type::m_width)
{
*--p0 = (cover_type)base_type::m_ren.cover(dist);
++dy;
}
base_type::m_ren.blend_solid_vspan(base_type::m_x,
base_type::m_y - dy + 1,
unsigned(p1 - p0),
p0);
return ++base_type::m_step < base_type::m_count;
}
//---------------------------------------------------------------------
bool step_ver()
{
int dist;
int dx;
int s1 = base_type::step_ver_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
*p1++ = (cover_type)base_type::m_ren.cover(s1);
dx = 1;
while((dist = base_type::m_dist[dx] - s1) <= base_type::m_width)
{
*p1++ = (cover_type)base_type::m_ren.cover(dist);
++dx;
}
dx = 1;
while((dist = base_type::m_dist[dx] + s1) <= base_type::m_width)
{
*--p0 = (cover_type)base_type::m_ren.cover(dist);
++dx;
}
base_type::m_ren.blend_solid_hspan(base_type::m_x - dx + 1,
base_type::m_y,
unsigned(p1 - p0),
p0);
return ++base_type::m_step < base_type::m_count;
}
private:
line_interpolator_aa0(const line_interpolator_aa0<Renderer>&);
const line_interpolator_aa0<Renderer>&
operator = (const line_interpolator_aa0<Renderer>&);
//---------------------------------------------------------------------
distance_interpolator1 m_di;
};
//====================================================line_interpolator_aa1
template<class Renderer> class line_interpolator_aa1 :
public line_interpolator_aa_base<Renderer>
{
public:
typedef Renderer renderer_type;
typedef typename Renderer::color_type color_type;
typedef line_interpolator_aa_base<Renderer> base_type;
//---------------------------------------------------------------------
line_interpolator_aa1(renderer_type& ren, const line_parameters& lp,
int sx, int sy) :
line_interpolator_aa_base<Renderer>(ren, lp),
m_di(lp.x1, lp.y1, lp.x2, lp.y2, sx, sy,
lp.x1 & ~line_subpixel_mask, lp.y1 & ~line_subpixel_mask)
{
int dist1_start;
int dist2_start;
int npix = 1;
if(lp.vertical)
{
do
{
--base_type::m_li;
base_type::m_y -= lp.inc;
base_type::m_x = (base_type::m_lp->x1 + base_type::m_li.y()) >> line_subpixel_shift;
if(lp.inc > 0) m_di.dec_y(base_type::m_x - base_type::m_old_x);
else m_di.inc_y(base_type::m_x - base_type::m_old_x);
base_type::m_old_x = base_type::m_x;
dist1_start = dist2_start = m_di.dist_start();
int dx = 0;
if(dist1_start < 0) ++npix;
do
{
dist1_start += m_di.dy_start();
dist2_start -= m_di.dy_start();
if(dist1_start < 0) ++npix;
if(dist2_start < 0) ++npix;
++dx;
}
while(base_type::m_dist[dx] <= base_type::m_width);
--base_type::m_step;
if(npix == 0) break;
npix = 0;
}
while(base_type::m_step >= -base_type::m_max_extent);
}
else
{
do
{
--base_type::m_li;
base_type::m_x -= lp.inc;
base_type::m_y = (base_type::m_lp->y1 + base_type::m_li.y()) >> line_subpixel_shift;
if(lp.inc > 0) m_di.dec_x(base_type::m_y - base_type::m_old_y);
else m_di.inc_x(base_type::m_y - base_type::m_old_y);
base_type::m_old_y = base_type::m_y;
dist1_start = dist2_start = m_di.dist_start();
int dy = 0;
if(dist1_start < 0) ++npix;
do
{
dist1_start -= m_di.dx_start();
dist2_start += m_di.dx_start();
if(dist1_start < 0) ++npix;
if(dist2_start < 0) ++npix;
++dy;
}
while(base_type::m_dist[dy] <= base_type::m_width);
--base_type::m_step;
if(npix == 0) break;
npix = 0;
}
while(base_type::m_step >= -base_type::m_max_extent);
}
base_type::m_li.adjust_forward();
}
//---------------------------------------------------------------------
bool step_hor()
{
int dist_start;
int dist;
int dy;
int s1 = base_type::step_hor_base(m_di);
dist_start = m_di.dist_start();
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
*p1 = 0;
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
}
++p1;
dy = 1;
while((dist = base_type::m_dist[dy] - s1) <= base_type::m_width)
{
dist_start -= m_di.dx_start();
*p1 = 0;
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
}
++p1;
++dy;
}
dy = 1;
dist_start = m_di.dist_start();
while((dist = base_type::m_dist[dy] + s1) <= base_type::m_width)
{
dist_start += m_di.dx_start();
*--p0 = 0;
if(dist_start <= 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
}
++dy;
}
base_type::m_ren.blend_solid_vspan(base_type::m_x,
base_type::m_y - dy + 1,
unsigned(p1 - p0),
p0);
return ++base_type::m_step < base_type::m_count;
}
//---------------------------------------------------------------------
bool step_ver()
{
int dist_start;
int dist;
int dx;
int s1 = base_type::step_ver_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
dist_start = m_di.dist_start();
*p1 = 0;
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
}
++p1;
dx = 1;
while((dist = base_type::m_dist[dx] - s1) <= base_type::m_width)
{
dist_start += m_di.dy_start();
*p1 = 0;
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
}
++p1;
++dx;
}
dx = 1;
dist_start = m_di.dist_start();
while((dist = base_type::m_dist[dx] + s1) <= base_type::m_width)
{
dist_start -= m_di.dy_start();
*--p0 = 0;
if(dist_start <= 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
}
++dx;
}
base_type::m_ren.blend_solid_hspan(base_type::m_x - dx + 1,
base_type::m_y,
unsigned(p1 - p0),
p0);
return ++base_type::m_step < base_type::m_count;
}
private:
line_interpolator_aa1(const line_interpolator_aa1<Renderer>&);
const line_interpolator_aa1<Renderer>&
operator = (const line_interpolator_aa1<Renderer>&);
//---------------------------------------------------------------------
distance_interpolator2 m_di;
};
//====================================================line_interpolator_aa2
template<class Renderer> class line_interpolator_aa2 :
public line_interpolator_aa_base<Renderer>
{
public:
typedef Renderer renderer_type;
typedef typename Renderer::color_type color_type;
typedef line_interpolator_aa_base<Renderer> base_type;
//---------------------------------------------------------------------
line_interpolator_aa2(renderer_type& ren, const line_parameters& lp,
int ex, int ey) :
line_interpolator_aa_base<Renderer>(ren, lp),
m_di(lp.x1, lp.y1, lp.x2, lp.y2, ex, ey,
lp.x1 & ~line_subpixel_mask, lp.y1 & ~line_subpixel_mask,
0)
{
base_type::m_li.adjust_forward();
base_type::m_step -= base_type::m_max_extent;
}
//---------------------------------------------------------------------
bool step_hor()
{
int dist_end;
int dist;
int dy;
int s1 = base_type::step_hor_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
dist_end = m_di.dist_end();
int npix = 0;
*p1 = 0;
if(dist_end > 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
++npix;
}
++p1;
dy = 1;
while((dist = base_type::m_dist[dy] - s1) <= base_type::m_width)
{
dist_end -= m_di.dx_end();
*p1 = 0;
if(dist_end > 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++p1;
++dy;
}
dy = 1;
dist_end = m_di.dist_end();
while((dist = base_type::m_dist[dy] + s1) <= base_type::m_width)
{
dist_end += m_di.dx_end();
*--p0 = 0;
if(dist_end > 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++dy;
}
base_type::m_ren.blend_solid_vspan(base_type::m_x,
base_type::m_y - dy + 1,
unsigned(p1 - p0),
p0);
return npix && ++base_type::m_step < base_type::m_count;
}
//---------------------------------------------------------------------
bool step_ver()
{
int dist_end;
int dist;
int dx;
int s1 = base_type::step_ver_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
dist_end = m_di.dist_end();
int npix = 0;
*p1 = 0;
if(dist_end > 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
++npix;
}
++p1;
dx = 1;
while((dist = base_type::m_dist[dx] - s1) <= base_type::m_width)
{
dist_end += m_di.dy_end();
*p1 = 0;
if(dist_end > 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++p1;
++dx;
}
dx = 1;
dist_end = m_di.dist_end();
while((dist = base_type::m_dist[dx] + s1) <= base_type::m_width)
{
dist_end -= m_di.dy_end();
*--p0 = 0;
if(dist_end > 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++dx;
}
base_type::m_ren.blend_solid_hspan(base_type::m_x - dx + 1,
base_type::m_y,
unsigned(p1 - p0),
p0);
return npix && ++base_type::m_step < base_type::m_count;
}
private:
line_interpolator_aa2(const line_interpolator_aa2<Renderer>&);
const line_interpolator_aa2<Renderer>&
operator = (const line_interpolator_aa2<Renderer>&);
//---------------------------------------------------------------------
distance_interpolator2 m_di;
};
//====================================================line_interpolator_aa3
template<class Renderer> class line_interpolator_aa3 :
public line_interpolator_aa_base<Renderer>
{
public:
typedef Renderer renderer_type;
typedef typename Renderer::color_type color_type;
typedef line_interpolator_aa_base<Renderer> base_type;
//---------------------------------------------------------------------
line_interpolator_aa3(renderer_type& ren, const line_parameters& lp,
int sx, int sy, int ex, int ey) :
line_interpolator_aa_base<Renderer>(ren, lp),
m_di(lp.x1, lp.y1, lp.x2, lp.y2, sx, sy, ex, ey,
lp.x1 & ~line_subpixel_mask, lp.y1 & ~line_subpixel_mask)
{
int dist1_start;
int dist2_start;
int npix = 1;
if(lp.vertical)
{
do
{
--base_type::m_li;
base_type::m_y -= lp.inc;
base_type::m_x = (base_type::m_lp->x1 + base_type::m_li.y()) >> line_subpixel_shift;
if(lp.inc > 0) m_di.dec_y(base_type::m_x - base_type::m_old_x);
else m_di.inc_y(base_type::m_x - base_type::m_old_x);
base_type::m_old_x = base_type::m_x;
dist1_start = dist2_start = m_di.dist_start();
int dx = 0;
if(dist1_start < 0) ++npix;
do
{
dist1_start += m_di.dy_start();
dist2_start -= m_di.dy_start();
if(dist1_start < 0) ++npix;
if(dist2_start < 0) ++npix;
++dx;
}
while(base_type::m_dist[dx] <= base_type::m_width);
if(npix == 0) break;
npix = 0;
}
while(--base_type::m_step >= -base_type::m_max_extent);
}
else
{
do
{
--base_type::m_li;
base_type::m_x -= lp.inc;
base_type::m_y = (base_type::m_lp->y1 + base_type::m_li.y()) >> line_subpixel_shift;
if(lp.inc > 0) m_di.dec_x(base_type::m_y - base_type::m_old_y);
else m_di.inc_x(base_type::m_y - base_type::m_old_y);
base_type::m_old_y = base_type::m_y;
dist1_start = dist2_start = m_di.dist_start();
int dy = 0;
if(dist1_start < 0) ++npix;
do
{
dist1_start -= m_di.dx_start();
dist2_start += m_di.dx_start();
if(dist1_start < 0) ++npix;
if(dist2_start < 0) ++npix;
++dy;
}
while(base_type::m_dist[dy] <= base_type::m_width);
if(npix == 0) break;
npix = 0;
}
while(--base_type::m_step >= -base_type::m_max_extent);
}
base_type::m_li.adjust_forward();
base_type::m_step -= base_type::m_max_extent;
}
//---------------------------------------------------------------------
bool step_hor()
{
int dist_start;
int dist_end;
int dist;
int dy;
int s1 = base_type::step_hor_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
dist_start = m_di.dist_start();
dist_end = m_di.dist_end();
int npix = 0;
*p1 = 0;
if(dist_end > 0)
{
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
}
++npix;
}
++p1;
dy = 1;
while((dist = base_type::m_dist[dy] - s1) <= base_type::m_width)
{
dist_start -= m_di.dx_start();
dist_end -= m_di.dx_end();
*p1 = 0;
if(dist_end > 0 && dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++p1;
++dy;
}
dy = 1;
dist_start = m_di.dist_start();
dist_end = m_di.dist_end();
while((dist = base_type::m_dist[dy] + s1) <= base_type::m_width)
{
dist_start += m_di.dx_start();
dist_end += m_di.dx_end();
*--p0 = 0;
if(dist_end > 0 && dist_start <= 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++dy;
}
base_type::m_ren.blend_solid_vspan(base_type::m_x,
base_type::m_y - dy + 1,
unsigned(p1 - p0),
p0);
return npix && ++base_type::m_step < base_type::m_count;
}
//---------------------------------------------------------------------
bool step_ver()
{
int dist_start;
int dist_end;
int dist;
int dx;
int s1 = base_type::step_ver_base(m_di);
cover_type* p0 = base_type::m_covers + base_type::max_half_width + 2;
cover_type* p1 = p0;
dist_start = m_di.dist_start();
dist_end = m_di.dist_end();
int npix = 0;
*p1 = 0;
if(dist_end > 0)
{
if(dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(s1);
}
++npix;
}
++p1;
dx = 1;
while((dist = base_type::m_dist[dx] - s1) <= base_type::m_width)
{
dist_start += m_di.dy_start();
dist_end += m_di.dy_end();
*p1 = 0;
if(dist_end > 0 && dist_start <= 0)
{
*p1 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++p1;
++dx;
}
dx = 1;
dist_start = m_di.dist_start();
dist_end = m_di.dist_end();
while((dist = base_type::m_dist[dx] + s1) <= base_type::m_width)
{
dist_start -= m_di.dy_start();
dist_end -= m_di.dy_end();
*--p0 = 0;
if(dist_end > 0 && dist_start <= 0)
{
*p0 = (cover_type)base_type::m_ren.cover(dist);
++npix;
}
++dx;
}
base_type::m_ren.blend_solid_hspan(base_type::m_x - dx + 1,
base_type::m_y,
unsigned(p1 - p0),
p0);
return npix && ++base_type::m_step < base_type::m_count;
}
private:
line_interpolator_aa3(const line_interpolator_aa3<Renderer>&);
const line_interpolator_aa3<Renderer>&
operator = (const line_interpolator_aa3<Renderer>&);
//---------------------------------------------------------------------
distance_interpolator3 m_di;
};
//==========================================================line_profile_aa
//
// See Implementation agg_line_profile_aa.cpp
//
class line_profile_aa
{
public:
//---------------------------------------------------------------------
typedef int8u value_type;
enum subpixel_scale_e
{
subpixel_shift = line_subpixel_shift,
subpixel_scale = 1 << subpixel_shift,
subpixel_mask = subpixel_scale - 1
};
enum aa_scale_e
{
aa_shift = 8,
aa_scale = 1 << aa_shift,
aa_mask = aa_scale - 1
};
//---------------------------------------------------------------------
line_profile_aa() :
m_subpixel_width(0),
m_min_width(1.0),
m_smoother_width(1.0)
{
int i;
for(i = 0; i < aa_scale; i++) m_gamma[i] = (value_type)i;
}
//---------------------------------------------------------------------
template<class GammaF>
line_profile_aa(double w, const GammaF& gamma_function) :
m_subpixel_width(0),
m_min_width(1.0),
m_smoother_width(1.0)
{
gamma(gamma_function);
width(w);
}
//---------------------------------------------------------------------
void min_width(double w) { m_min_width = w; }
void smoother_width(double w) { m_smoother_width = w; }
//---------------------------------------------------------------------
template<class GammaF> void gamma(const GammaF& gamma_function)
{
int i;
for(i = 0; i < aa_scale; i++)
{
m_gamma[i] = value_type(
uround(gamma_function(double(i) / aa_mask) * aa_mask));
}
}
void width(double w);
1.upgrade to latest agg2.4 2.added default PointSymbolizer in load_map.cpp
2006-11-09 23:44:34 +00:00
unsigned profile_size() const { return m_profile.size(); }
new build system
2006-01-31 23:09:52 +00:00
int subpixel_width() const { return m_subpixel_width; }
//---------------------------------------------------------------------
double min_width() const { return m_min_width; }
double smoother_width() const { return m_smoother_width; }
//---------------------------------------------------------------------
value_type value(int dist) const
{
return m_profile[dist + subpixel_scale*2];
}
private:
line_profile_aa(const line_profile_aa&);
const line_profile_aa& operator = (const line_profile_aa&);
value_type* profile(double w);
void set(double center_width, double smoother_width);
//---------------------------------------------------------------------
1.upgrade to latest agg2.4 2.added default PointSymbolizer in load_map.cpp
2006-11-09 23:44:34 +00:00
pod_array<value_type> m_profile;
value_type m_gamma[aa_scale];
int m_subpixel_width;
double m_min_width;
double m_smoother_width;
new build system
2006-01-31 23:09:52 +00:00
};
//======================================================renderer_outline_aa
template<class BaseRenderer> class renderer_outline_aa
{
public:
//---------------------------------------------------------------------
typedef BaseRenderer base_ren_type;
typedef renderer_outline_aa<base_ren_type> self_type;
typedef typename base_ren_type::color_type color_type;
//---------------------------------------------------------------------
renderer_outline_aa(base_ren_type& ren, const line_profile_aa& prof) :
m_ren(&ren),
m_profile(&prof),
m_clip_box(0,0,0,0),
m_clipping(false)
1.upgrade to latest agg2.4 2.added default PointSymbolizer in load_map.cpp
2006-11-09 23:44:34 +00:00
{}
void attach(base_ren_type& ren) { m_ren = &ren; }
new build system
2006-01-31 23:09:52 +00:00
//---------------------------------------------------------------------
void color(const color_type& c) { m_color = c; }
const color_type& color() const { return m_color; }
//---------------------------------------------------------------------
void profile(const line_profile_aa& prof) { m_profile = &prof; }
const line_profile_aa& profile() const { return *m_profile; }
allow clang trunk compile
2011-01-06 00:28:16 +00:00
//line_profile_aa& profile() { return *m_profile; }
new build system
2006-01-31 23:09:52 +00:00
//---------------------------------------------------------------------
int subpixel_width() const { return m_profile->subpixel_width(); }
//---------------------------------------------------------------------
void reset_clipping() { m_clipping = false; }
void clip_box(double x1, double y1, double x2, double y2)
{
m_clip_box.x1 = line_coord_sat::conv(x1);
m_clip_box.y1 = line_coord_sat::conv(y1);
m_clip_box.x2 = line_coord_sat::conv(x2);
m_clip_box.y2 = line_coord_sat::conv(y2);
m_clipping = true;
}
//---------------------------------------------------------------------
int cover(int d) const
{
return m_profile->value(d);
}
//-------------------------------------------------------------------------
void blend_solid_hspan(int x, int y, unsigned len, const cover_type* covers)
{
m_ren->blend_solid_hspan(x, y, len, m_color, covers);
}
//-------------------------------------------------------------------------
void blend_solid_vspan(int x, int y, unsigned len, const cover_type* covers)
{
m_ren->blend_solid_vspan(x, y, len, m_color, covers);
}
//-------------------------------------------------------------------------
static bool accurate_join_only() { return false; }
//-------------------------------------------------------------------------
template<class Cmp>
void semidot_hline(Cmp cmp,
int xc1, int yc1, int xc2, int yc2,
int x1, int y1, int x2)
{
cover_type covers[line_interpolator_aa_base<self_type>::max_half_width * 2 + 4];
cover_type* p0 = covers;
cover_type* p1 = covers;
int x = x1 << line_subpixel_shift;
int y = y1 << line_subpixel_shift;
int w = subpixel_width();
distance_interpolator0 di(xc1, yc1, xc2, yc2, x, y);
x += line_subpixel_scale/2;
y += line_subpixel_scale/2;
int x0 = x1;
int dx = x - xc1;
int dy = y - yc1;
do
{
int d = int(fast_sqrt(dx*dx + dy*dy));
*p1 = 0;
if(cmp(di.dist()) && d <= w)
{
*p1 = (cover_type)cover(d);
}
++p1;
dx += line_subpixel_scale;
di.inc_x();
}
while(++x1 <= x2);
m_ren->blend_solid_hspan(x0, y1,
unsigned(p1 - p0),
color(),
p0);
}
//-------------------------------------------------------------------------
template<class Cmp>
void semidot(Cmp cmp, int xc1, int yc1, int xc2, int yc2)
{
if(m_clipping && clipping_flags(xc1, yc1, m_clip_box)) return;
int r = ((subpixel_width() + line_subpixel_mask) >> line_subpixel_shift);
if(r < 1) r = 1;
ellipse_bresenham_interpolator ei(r, r);
int dx = 0;
int dy = -r;
int dy0 = dy;
int dx0 = dx;
int x = xc1 >> line_subpixel_shift;
int y = yc1 >> line_subpixel_shift;
do
{
dx += ei.dx();
dy += ei.dy();
if(dy != dy0)
{
semidot_hline(cmp, xc1, yc1, xc2, yc2, x-dx0, y+dy0, x+dx0);
semidot_hline(cmp, xc1, yc1, xc2, yc2, x-dx0, y-dy0, x+dx0);
}
dx0 = dx;
dy0 = dy;
++ei;
}
while(dy < 0);
semidot_hline(cmp, xc1, yc1, xc2, yc2, x-dx0, y+dy0, x+dx0);
}
//-------------------------------------------------------------------------
void pie_hline(int xc, int yc, int xp1, int yp1, int xp2, int yp2,
int xh1, int yh1, int xh2)
{
if(m_clipping && clipping_flags(xc, yc, m_clip_box)) return;
cover_type covers[line_interpolator_aa_base<self_type>::max_half_width * 2 + 4];
cover_type* p0 = covers;
cover_type* p1 = covers;
int x = xh1 << line_subpixel_shift;
int y = yh1 << line_subpixel_shift;
int w = subpixel_width();
distance_interpolator00 di(xc, yc, xp1, yp1, xp2, yp2, x, y);
x += line_subpixel_scale/2;
y += line_subpixel_scale/2;
int xh0 = xh1;
int dx = x - xc;
int dy = y - yc;
do
{
int d = int(fast_sqrt(dx*dx + dy*dy));
*p1 = 0;
if(di.dist1() <= 0 && di.dist2() > 0 && d <= w)
{
*p1 = (cover_type)cover(d);
}
++p1;
dx += line_subpixel_scale;
di.inc_x();
}
while(++xh1 <= xh2);
m_ren->blend_solid_hspan(xh0, yh1,
unsigned(p1 - p0),
color(),
p0);
}
//-------------------------------------------------------------------------
void pie(int xc, int yc, int x1, int y1, int x2, int y2)
{
int r = ((subpixel_width() + line_subpixel_mask) >> line_subpixel_shift);
if(r < 1) r = 1;
ellipse_bresenham_interpolator ei(r, r);
int dx = 0;
int dy = -r;
int dy0 = dy;
int dx0 = dx;
int x = xc >> line_subpixel_shift;
int y = yc >> line_subpixel_shift;
do
{
dx += ei.dx();
dy += ei.dy();
if(dy != dy0)
{
pie_hline(xc, yc, x1, y1, x2, y2, x-dx0, y+dy0, x+dx0);
pie_hline(xc, yc, x1, y1, x2, y2, x-dx0, y-dy0, x+dx0);
}
dx0 = dx;
dy0 = dy;
++ei;
}
while(dy < 0);
pie_hline(xc, yc, x1, y1, x2, y2, x-dx0, y+dy0, x+dx0);
}
//-------------------------------------------------------------------------
void line0_no_clip(const line_parameters& lp)
{
if(lp.len > line_max_length)
{
line_parameters lp1, lp2;
lp.divide(lp1, lp2);
line0_no_clip(lp1);
line0_no_clip(lp2);
return;
}
line_interpolator_aa0<self_type> li(*this, lp);
if(li.count())
{
if(li.vertical())
{
while(li.step_ver());
}
else
{
while(li.step_hor());
}
}
}
//-------------------------------------------------------------------------
void line0(const line_parameters& lp)
{
if(m_clipping)
{
int x1 = lp.x1;
int y1 = lp.y1;
int x2 = lp.x2;
int y2 = lp.y2;
unsigned flags = clip_line_segment(&x1, &y1, &x2, &y2, m_clip_box);
if((flags & 4) == 0)
{
if(flags)
{
line_parameters lp2(x1, y1, x2, y2,
uround(calc_distance(x1, y1, x2, y2)));
line0_no_clip(lp2);
}
else
{
line0_no_clip(lp);
}
}
}
else
{
line0_no_clip(lp);
}
}
//-------------------------------------------------------------------------
void line1_no_clip(const line_parameters& lp, int sx, int sy)
{
if(lp.len > line_max_length)
{
line_parameters lp1, lp2;
lp.divide(lp1, lp2);
line1_no_clip(lp1, (lp.x1 + sx) >> 1, (lp.y1 + sy) >> 1);
line1_no_clip(lp2, lp1.x2 + (lp1.y2 - lp1.y1), lp1.y2 - (lp1.x2 - lp1.x1));
return;
}
fix_degenerate_bisectrix_start(lp, &sx, &sy);
line_interpolator_aa1<self_type> li(*this, lp, sx, sy);
if(li.vertical())
{
while(li.step_ver());
}
else
{
while(li.step_hor());
}
}
//-------------------------------------------------------------------------
void line1(const line_parameters& lp, int sx, int sy)
{
if(m_clipping)
{
int x1 = lp.x1;
int y1 = lp.y1;
int x2 = lp.x2;
int y2 = lp.y2;
unsigned flags = clip_line_segment(&x1, &y1, &x2, &y2, m_clip_box);
if((flags & 4) == 0)
{
if(flags)
{
line_parameters lp2(x1, y1, x2, y2,
uround(calc_distance(x1, y1, x2, y2)));
if(flags & 1)
{
sx = x1 + (y2 - y1);
sy = y1 - (x2 - x1);
}
else
{
fixed indefinite loop conditions when len=1 - while(abs(sx - lp.x1) + abs(sy - lp.y1) > lp2.len) + while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len) { sx = (lp.x1 + sx) >> 1; sy = (lp.y1 + sy) >> 1; }
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while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len)
new build system
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{
sx = (lp.x1 + sx) >> 1;
sy = (lp.y1 + sy) >> 1;
}
}
line1_no_clip(lp2, sx, sy);
}
else
{
line1_no_clip(lp, sx, sy);
}
}
}
else
{
line1_no_clip(lp, sx, sy);
}
}
//-------------------------------------------------------------------------
void line2_no_clip(const line_parameters& lp, int ex, int ey)
{
if(lp.len > line_max_length)
{
line_parameters lp1, lp2;
lp.divide(lp1, lp2);
line2_no_clip(lp1, lp1.x2 + (lp1.y2 - lp1.y1), lp1.y2 - (lp1.x2 - lp1.x1));
line2_no_clip(lp2, (lp.x2 + ex) >> 1, (lp.y2 + ey) >> 1);
return;
}
fix_degenerate_bisectrix_end(lp, &ex, &ey);
line_interpolator_aa2<self_type> li(*this, lp, ex, ey);
if(li.vertical())
{
while(li.step_ver());
}
else
{
while(li.step_hor());
}
}
//-------------------------------------------------------------------------
void line2(const line_parameters& lp, int ex, int ey)
{
if(m_clipping)
{
int x1 = lp.x1;
int y1 = lp.y1;
int x2 = lp.x2;
int y2 = lp.y2;
unsigned flags = clip_line_segment(&x1, &y1, &x2, &y2, m_clip_box);
if((flags & 4) == 0)
{
if(flags)
{
line_parameters lp2(x1, y1, x2, y2,
uround(calc_distance(x1, y1, x2, y2)));
if(flags & 2)
{
ex = x2 + (y2 - y1);
ey = y2 - (x2 - x1);
}
else
{
fixed indefinite loop conditions when len=1 - while(abs(sx - lp.x1) + abs(sy - lp.y1) > lp2.len) + while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len) { sx = (lp.x1 + sx) >> 1; sy = (lp.y1 + sy) >> 1; }
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while(abs(ex - lp.x2) + abs(ey - lp.y2) > 1 + lp2.len)
new build system
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{
ex = (lp.x2 + ex) >> 1;
ey = (lp.y2 + ey) >> 1;
}
}
line2_no_clip(lp2, ex, ey);
}
else
{
line2_no_clip(lp, ex, ey);
}
}
}
else
{
line2_no_clip(lp, ex, ey);
}
}
//-------------------------------------------------------------------------
void line3_no_clip(const line_parameters& lp,
int sx, int sy, int ex, int ey)
{
if(lp.len > line_max_length)
{
line_parameters lp1, lp2;
lp.divide(lp1, lp2);
int mx = lp1.x2 + (lp1.y2 - lp1.y1);
int my = lp1.y2 - (lp1.x2 - lp1.x1);
line3_no_clip(lp1, (lp.x1 + sx) >> 1, (lp.y1 + sy) >> 1, mx, my);
line3_no_clip(lp2, mx, my, (lp.x2 + ex) >> 1, (lp.y2 + ey) >> 1);
return;
}
fix_degenerate_bisectrix_start(lp, &sx, &sy);
fix_degenerate_bisectrix_end(lp, &ex, &ey);
line_interpolator_aa3<self_type> li(*this, lp, sx, sy, ex, ey);
if(li.vertical())
{
while(li.step_ver());
}
else
{
while(li.step_hor());
}
}
//-------------------------------------------------------------------------
void line3(const line_parameters& lp,
int sx, int sy, int ex, int ey)
{
if(m_clipping)
{
int x1 = lp.x1;
int y1 = lp.y1;
int x2 = lp.x2;
int y2 = lp.y2;
unsigned flags = clip_line_segment(&x1, &y1, &x2, &y2, m_clip_box);
if((flags & 4) == 0)
{
if(flags)
{
line_parameters lp2(x1, y1, x2, y2,
uround(calc_distance(x1, y1, x2, y2)));
if(flags & 1)
{
sx = x1 + (y2 - y1);
sy = y1 - (x2 - x1);
}
else
{
fixed indefinite loop conditions when len=1 - while(abs(sx - lp.x1) + abs(sy - lp.y1) > lp2.len) + while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len) { sx = (lp.x1 + sx) >> 1; sy = (lp.y1 + sy) >> 1; }
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while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len)
new build system
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{
sx = (lp.x1 + sx) >> 1;
sy = (lp.y1 + sy) >> 1;
}
}
if(flags & 2)
{
ex = x2 + (y2 - y1);
ey = y2 - (x2 - x1);
}
else
{
fixed indefinite loop conditions when len=1 - while(abs(sx - lp.x1) + abs(sy - lp.y1) > lp2.len) + while(abs(sx - lp.x1) + abs(sy - lp.y1) > 1 + lp2.len) { sx = (lp.x1 + sx) >> 1; sy = (lp.y1 + sy) >> 1; }
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while(abs(ex - lp.x2) + abs(ey - lp.y2) > 1 + lp2.len)
new build system
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{
ex = (lp.x2 + ex) >> 1;
ey = (lp.y2 + ey) >> 1;
}
}
line3_no_clip(lp2, sx, sy, ex, ey);
}
else
{
line3_no_clip(lp, sx, sy, ex, ey);
}
}
}
else
{
line3_no_clip(lp, sx, sy, ex, ey);
}
}
private:
base_ren_type* m_ren;
const line_profile_aa* m_profile;
color_type m_color;
rect_i m_clip_box;
bool m_clipping;
};
}
#endif
Reference in a new issue Copy permalink