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97 lines
2.8 KiB
97 lines
2.8 KiB
//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.4 |
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
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// |
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// Permission to copy, use, modify, sell and distribute this software |
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// is granted provided this copyright notice appears in all copies. |
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// This software is provided "as is" without express or implied |
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// warranty, and with no claim as to its suitability for any purpose. |
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// |
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//---------------------------------------------------------------------------- |
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// Contact: mcseem@antigrain.com |
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// mcseemagg@yahoo.com |
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// http://www.antigrain.com |
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//---------------------------------------------------------------------------- |
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#ifndef AGG_PIXFMT_BASE_INCLUDED |
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#define AGG_PIXFMT_BASE_INCLUDED |
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#include "agg_basics.h" |
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#include "agg_color_gray.h" |
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#include "agg_color_rgba.h" |
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namespace agg |
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{ |
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struct pixfmt_gray_tag |
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{ |
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}; |
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struct pixfmt_rgb_tag |
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{ |
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}; |
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struct pixfmt_rgba_tag |
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{ |
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}; |
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//--------------------------------------------------------------blender_base |
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template<class ColorT, class Order = void> |
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struct blender_base |
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{ |
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typedef ColorT color_type; |
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typedef Order order_type; |
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typedef typename color_type::value_type value_type; |
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static rgba get(value_type r, value_type g, value_type b, value_type a, cover_type cover = cover_full) |
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{ |
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if (cover > cover_none) |
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{ |
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rgba c( |
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color_type::to_double(r), |
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color_type::to_double(g), |
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color_type::to_double(b), |
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color_type::to_double(a)); |
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if (cover < cover_full) |
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{ |
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double x = double(cover) / cover_full; |
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c.r *= x; |
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c.g *= x; |
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c.b *= x; |
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c.a *= x; |
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} |
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return c; |
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} |
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else return rgba::no_color(); |
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} |
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static rgba get(const value_type* p, cover_type cover = cover_full) |
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{ |
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return get( |
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p[order_type::R], |
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p[order_type::G], |
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p[order_type::B], |
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p[order_type::A], |
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cover); |
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} |
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static void set(value_type* p, value_type r, value_type g, value_type b, value_type a) |
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{ |
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p[order_type::R] = r; |
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p[order_type::G] = g; |
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p[order_type::B] = b; |
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p[order_type::A] = a; |
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} |
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static void set(value_type* p, const rgba& c) |
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{ |
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p[order_type::R] = color_type::from_double(c.r); |
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p[order_type::G] = color_type::from_double(c.g); |
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p[order_type::B] = color_type::from_double(c.b); |
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p[order_type::A] = color_type::from_double(c.a); |
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} |
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}; |
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} |
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#endif
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