1 /* 2 * Copyright 2008, Andrej Spielmann <andrej.spielmann@seh.ox.ac.uk>. 3 * All rights reserved. Distributed under the terms of the MIT License. 4 * 5 * Copyright 2002-2004 Maxim Shemanarev (http://www.antigrain.com) 6 * 7 * 8 */ 9 10 #include <Region.h> 11 12 #include "agg_basics.h" 13 #include "agg_array.h" 14 #include "agg_renderer_base.h" 15 #include "agg_renderer_scanline.h" 16 17 18 namespace agg 19 { 20 21 //============================================render_scanline_subpix_solid 22 template<class Scanline, class BaseRenderer, class ColorT> 23 void render_scanline_subpix_solid(const Scanline& sl, 24 BaseRenderer& ren, 25 const ColorT& color) 26 { 27 int y = sl.y(); 28 unsigned num_spans = sl.num_spans(); 29 typename Scanline::const_iterator span = sl.begin(); 30 31 for(;;) 32 { 33 int x = span->x; 34 if(span->len > 0) 35 { 36 ren.blend_solid_hspan_subpix(x, y, (unsigned)span->len, 37 color, 38 span->covers); 39 } 40 else 41 { 42 ren.blend_hline_subpix(x, y, (unsigned)(x - span->len - 1), 43 color, 44 *(span->covers)); 45 } 46 if(--num_spans == 0) break; 47 ++span; 48 } 49 } 50 51 52 //==========================================renderer_scanline_subpix_solid 53 template<class BaseRenderer> class renderer_scanline_subpix_solid 54 { 55 public: 56 typedef BaseRenderer base_ren_type; 57 typedef typename base_ren_type::color_type color_type; 58 59 //-------------------------------------------------------------------- 60 renderer_scanline_subpix_solid() : m_ren(0) {} 61 renderer_scanline_subpix_solid(base_ren_type& ren) : m_ren(&ren) {} 62 void attach(base_ren_type& ren) 63 { 64 m_ren = &ren; 65 } 66 67 //-------------------------------------------------------------------- 68 void color(const color_type& c) { m_color = c; } 69 const color_type& color() const { return m_color; } 70 71 //-------------------------------------------------------------------- 72 void prepare() {} 73 74 //-------------------------------------------------------------------- 75 template<class Scanline> void render(const Scanline& sl) 76 { 77 render_scanline_subpix_solid(sl, *m_ren, m_color); 78 } 79 80 private: 81 base_ren_type* m_ren; 82 color_type m_color; 83 }; 84 85 } 86