1 //----------------------------------------------------------------------------
2 // Anti-Grain Geometry - Version 2.4
3 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
4 //
5 // Permission to copy, use, modify, sell and distribute this software
6 // is granted provided this copyright notice appears in all copies.
7 // This software is provided "as is" without express or implied
8 // warranty, and with no claim as to its suitability for any purpose.
9 //
10 //----------------------------------------------------------------------------
11 // Contact: mcseem@antigrain.com
12 //          mcseemagg@yahoo.com
13 //          http://www.antigrain.com
14 //----------------------------------------------------------------------------
15 //
16 // Adaptation for high precision colors has been sponsored by
17 // Liberty Technology Systems, Inc., visit http://lib-sys.com
18 //
19 // Liberty Technology Systems, Inc. is the provider of
20 // PostScript and PDF technology for software developers.
21 //
22 //----------------------------------------------------------------------------
23 
24 
25 #ifndef AGG_SPAN_PATTERN_RGB_INCLUDED
26 #define AGG_SPAN_PATTERN_RGB_INCLUDED
27 
28 #include "agg_basics.h"
29 
30 namespace mapserver
31 {
32 
33     //========================================================span_pattern_rgb
34     template<class Source> class span_pattern_rgb
35     {
36     public:
37         typedef Source source_type;
38         typedef typename source_type::color_type color_type;
39         typedef typename source_type::order_type order_type;
40         typedef typename color_type::value_type value_type;
41         typedef typename color_type::calc_type calc_type;
42 
43         //--------------------------------------------------------------------
span_pattern_rgb()44         span_pattern_rgb() {}
span_pattern_rgb(source_type & src,unsigned offset_x,unsigned offset_y)45         span_pattern_rgb(source_type& src,
46                          unsigned offset_x, unsigned offset_y) :
47             m_src(&src),
48             m_offset_x(offset_x),
49             m_offset_y(offset_y),
50             m_alpha(color_type::base_mask)
51         {}
52 
53         //--------------------------------------------------------------------
attach(source_type & v)54         void   attach(source_type& v)      { m_src = &v; }
source()55                source_type& source()       { return *m_src; }
source()56         const  source_type& source() const { return *m_src; }
57 
58         //--------------------------------------------------------------------
offset_x(unsigned v)59         void       offset_x(unsigned v) { m_offset_x = v; }
offset_y(unsigned v)60         void       offset_y(unsigned v) { m_offset_y = v; }
offset_x()61         unsigned   offset_x() const { return m_offset_x; }
offset_y()62         unsigned   offset_y() const { return m_offset_y; }
alpha(value_type v)63         void       alpha(value_type v) { m_alpha = v; }
alpha()64         value_type alpha() const { return m_alpha; }
65 
66         //--------------------------------------------------------------------
prepare()67         void prepare() {}
generate(color_type * span,int x,int y,unsigned len)68         void generate(color_type* span, int x, int y, unsigned len)
69         {
70             x += m_offset_x;
71             y += m_offset_y;
72             const value_type* p = (const value_type*)m_src->span(x, y, len);
73             do
74             {
75                 span->r = p[order_type::R];
76                 span->g = p[order_type::G];
77                 span->b = p[order_type::B];
78                 span->a = m_alpha;
79                 p = m_src->next_x();
80                 ++span;
81             }
82             while(--len);
83         }
84 
85     private:
86         source_type* m_src;
87         unsigned     m_offset_x;
88         unsigned     m_offset_y;
89         value_type   m_alpha;
90 
91     };
92 
93 }
94 
95 #endif
96 
97