//---------------------------------------------------------------------------- // 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