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| 1 | |
| 2 //---------------------------------------------------------------------------- | |
| 3 // Anti-Grain Geometry - Version 2.3 | |
| 4 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) | |
| 5 // | |
| 6 // Permission to copy, use, modify, sell and distribute this software | |
| 7 // is granted provided this copyright notice appears in all copies. | |
| 8 // This software is provided "as is" without express or implied | |
| 9 // warranty, and with no claim as to its suitability for any purpose. | |
| 10 // | |
| 11 //---------------------------------------------------------------------------- | |
| 12 // Contact: mcseem@antigrain.com | |
| 13 // mcseemagg@yahoo.com | |
| 14 // http://www.antigrain.com | |
| 15 //---------------------------------------------------------------------------- | |
| 16 #ifndef AGG_RENDERER_SCANLINE_INCLUDED | |
| 17 #define AGG_RENDERER_SCANLINE_INCLUDED | |
| 18 #include "agg_basics.h" | |
| 19 #include "agg_renderer_base.h" | |
| 20 #include "agg_render_scanlines.h" | |
| 21 namespace agg | |
| 22 { | |
| 23 template<class BaseRenderer, class SpanGenerator> class renderer_scanline_aa : p
ublic CFX_Object | |
| 24 { | |
| 25 public: | |
| 26 typedef BaseRenderer base_ren_type; | |
| 27 typedef SpanGenerator span_gen_type; | |
| 28 renderer_scanline_aa() : m_ren(0), m_span_gen(0) {} | |
| 29 renderer_scanline_aa(base_ren_type& ren, span_gen_type& span_gen) : | |
| 30 m_ren(&ren), | |
| 31 m_span_gen(&span_gen) | |
| 32 {} | |
| 33 void attach(base_ren_type& ren, span_gen_type& span_gen) | |
| 34 { | |
| 35 m_ren = &ren; | |
| 36 m_span_gen = &span_gen; | |
| 37 } | |
| 38 void prepare(unsigned max_span_len) | |
| 39 { | |
| 40 m_span_gen->prepare(max_span_len); | |
| 41 } | |
| 42 template<class Scanline> void render(const Scanline& sl) | |
| 43 { | |
| 44 int y = sl.y(); | |
| 45 m_ren->first_clip_box(); | |
| 46 do { | |
| 47 int xmin = m_ren->xmin(); | |
| 48 int xmax = m_ren->xmax(); | |
| 49 if(y >= m_ren->ymin() && y <= m_ren->ymax()) { | |
| 50 unsigned num_spans = sl.num_spans(); | |
| 51 typename Scanline::const_iterator span = sl.begin(); | |
| 52 for(;;) { | |
| 53 int x = span->x; | |
| 54 int len = span->len; | |
| 55 bool solid = false; | |
| 56 const typename Scanline::cover_type* covers = span->covers; | |
| 57 if(len < 0) { | |
| 58 solid = true; | |
| 59 len = -len; | |
| 60 } | |
| 61 if(x < xmin) { | |
| 62 len -= xmin - x; | |
| 63 if(!solid) { | |
| 64 covers += xmin - x; | |
| 65 } | |
| 66 x = xmin; | |
| 67 } | |
| 68 if(len > 0) { | |
| 69 if(x + len > xmax) { | |
| 70 len = xmax - x + 1; | |
| 71 } | |
| 72 if(len > 0) { | |
| 73 m_ren->blend_color_hspan_no_clip( | |
| 74 x, y, len, | |
| 75 m_span_gen->generate(x, y, len), | |
| 76 solid ? 0 : covers, | |
| 77 *covers); | |
| 78 } | |
| 79 } | |
| 80 if(--num_spans == 0) { | |
| 81 break; | |
| 82 } | |
| 83 ++span; | |
| 84 } | |
| 85 } | |
| 86 } while(m_ren->next_clip_box()); | |
| 87 } | |
| 88 private: | |
| 89 base_ren_type* m_ren; | |
| 90 SpanGenerator* m_span_gen; | |
| 91 }; | |
| 92 } | |
| 93 #endif | |
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Chromium Code Reviews
Issue 402463002:
Replace agg with skia (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master