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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
//----------------------------------------------------------------------------
//
// class renderer_primitives
//
//----------------------------------------------------------------------------
#ifndef AGG_RENDERER_PRIMITIVES_INCLUDED
#define AGG_RENDERER_PRIMITIVES_INCLUDED
#include "agg_basics.h"
#include "agg_renderer_base.h"
#include "agg_dda_line.h"
#include "agg_ellipse_bresenham.h"
namespace agg
{
//-----------------------------------------------------renderer_primitives
template<class BaseRenderer> class renderer_primitives
{
public:
typedef BaseRenderer base_ren_type;
typedef typename base_ren_type::color_type color_type;
//--------------------------------------------------------------------
explicit renderer_primitives(base_ren_type& ren) :
m_ren(&ren),
m_fill_color(),
m_line_color(),
m_curr_x(0),
m_curr_y(0)
{}
void attach(base_ren_type& ren) { m_ren = &ren; }
//--------------------------------------------------------------------
static int coord(double c)
{
return iround(c * line_bresenham_interpolator::subpixel_scale);
}
//--------------------------------------------------------------------
void fill_color(const color_type& c) { m_fill_color = c; }
void line_color(const color_type& c) { m_line_color = c; }
const color_type& fill_color() const { return m_fill_color; }
const color_type& line_color() const { return m_line_color; }
//--------------------------------------------------------------------
void rectangle(int x1, int y1, int x2, int y2)
{
m_ren->blend_hline(x1, y1, x2-1, m_line_color, cover_full);
m_ren->blend_vline(x2, y1, y2-1, m_line_color, cover_full);
m_ren->blend_hline(x1+1, y2, x2, m_line_color, cover_full);
m_ren->blend_vline(x1, y1+1, y2, m_line_color, cover_full);
}
//--------------------------------------------------------------------
void solid_rectangle(int x1, int y1, int x2, int y2)
{
m_ren->blend_bar(x1, y1, x2, y2, m_fill_color, cover_full);
}
//--------------------------------------------------------------------
void outlined_rectangle(int x1, int y1, int x2, int y2)
{
rectangle(x1, y1, x2, y2);
m_ren->blend_bar(x1+1, y1+1, x2-1, y2-1, m_fill_color, cover_full);
}
//--------------------------------------------------------------------
void ellipse(int x, int y, int rx, int ry)
{
ellipse_bresenham_interpolator ei(rx, ry);
int dx = 0;
int dy = -ry;
do
{
dx += ei.dx();
dy += ei.dy();
m_ren->blend_pixel(x + dx, y + dy, m_line_color, cover_full);
m_ren->blend_pixel(x + dx, y - dy, m_line_color, cover_full);
m_ren->blend_pixel(x - dx, y - dy, m_line_color, cover_full);
m_ren->blend_pixel(x - dx, y + dy, m_line_color, cover_full);
++ei;
}
while(dy < 0);
}
//--------------------------------------------------------------------
void solid_ellipse(int x, int y, int rx, int ry)
{
ellipse_bresenham_interpolator ei(rx, ry);
int dx = 0;
int dy = -ry;
int dy0 = dy;
int dx0 = dx;
do
{
dx += ei.dx();
dy += ei.dy();
if(dy != dy0)
{
m_ren->blend_hline(x-dx0, y+dy0, x+dx0, m_fill_color, cover_full);
m_ren->blend_hline(x-dx0, y-dy0, x+dx0, m_fill_color, cover_full);
}
dx0 = dx;
dy0 = dy;
++ei;
}
while(dy < 0);
m_ren->blend_hline(x-dx0, y+dy0, x+dx0, m_fill_color, cover_full);
}
//--------------------------------------------------------------------
void outlined_ellipse(int x, int y, int rx, int ry)
{
ellipse_bresenham_interpolator ei(rx, ry);
int dx = 0;
int dy = -ry;
do
{
dx += ei.dx();
dy += ei.dy();
m_ren->blend_pixel(x + dx, y + dy, m_line_color, cover_full);
m_ren->blend_pixel(x + dx, y - dy, m_line_color, cover_full);
m_ren->blend_pixel(x - dx, y - dy, m_line_color, cover_full);
m_ren->blend_pixel(x - dx, y + dy, m_line_color, cover_full);
if(ei.dy() && dx)
{
m_ren->blend_hline(x-dx+1, y+dy, x+dx-1, m_fill_color, cover_full);
m_ren->blend_hline(x-dx+1, y-dy, x+dx-1, m_fill_color, cover_full);
}
++ei;
}
while(dy < 0);
}
//--------------------------------------------------------------------
void line(int x1, int y1, int x2, int y2, bool last=false)
{
line_bresenham_interpolator li(x1, y1, x2, y2);
unsigned len = li.len();
if(len == 0)
{
if(last)
{
m_ren->blend_pixel(li.line_lr(x1), li.line_lr(y1), m_line_color, cover_full);
}
return;
}
if(last) ++len;
if(li.is_ver())
{
do
{
m_ren->blend_pixel(li.x2(), li.y1(), m_line_color, cover_full);
li.vstep();
}
while(--len);
}
else
{
do
{
m_ren->blend_pixel(li.x1(), li.y2(), m_line_color, cover_full);
li.hstep();
}
while(--len);
}
}
//--------------------------------------------------------------------
void move_to(int x, int y)
{
m_curr_x = x;
m_curr_y = y;
}
//--------------------------------------------------------------------
void line_to(int x, int y, bool last=false)
{
line(m_curr_x, m_curr_y, x, y, last);
m_curr_x = x;
m_curr_y = y;
}
//--------------------------------------------------------------------
const base_ren_type& ren() const { return *m_ren; }
base_ren_type& ren() { return *m_ren; }
//--------------------------------------------------------------------
const rendering_buffer& rbuf() const { return m_ren->rbuf(); }
rendering_buffer& rbuf() { return m_ren->rbuf(); }
private:
base_ren_type* m_ren;
color_type m_fill_color;
color_type m_line_color;
int m_curr_x;
int m_curr_y;
};
}
#endif
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