97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
//----------------------------------------------------------------------------
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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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