84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010-2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_COLOUR_HPP
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#define __UTIL_COLOUR_HPP
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#include "coord.hpp"
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#include "introspection.hpp"
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#include <ostream>
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namespace util {
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/// An RGBA colour POD type.
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template <size_t S, typename T>
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struct colour : public coord::base<S,T,colour,coord::rgba,coord::hsv> {
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using coord::base<S,T,util::colour,coord::rgba,coord::hsv>::base;
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using base_t = coord::base<S,T,util::colour,coord::rgba,coord::hsv>;
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// overloaded cast operator which assumes values are unit normalised
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template <typename U>
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colour<S,U>
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cast (void) const;
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static const colour WHITE;
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static const colour BLACK;
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static const colour RED;
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static const colour BLUE;
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static const colour GREEN;
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static colour from_html (const std::string&);
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static colour from_x11 (const std::string&);
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static colour from_string (const std::string&);
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};
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// Convenience types
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template <typename T> using colour1 = colour<1,T>;
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template <typename T> using colour3 = colour<3,T>;
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template <typename T> using colour4 = colour<4,T>;
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typedef colour3<uint8_t> colour1u;
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typedef colour3<uint8_t> colour3u;
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typedef colour4<uint8_t> colour4u;
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typedef colour1<float> colour1f;
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typedef colour3<float> colour3f;
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typedef colour4<float> colour4f;
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// RGB/HSV conversions
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colour3f rgb_to_hsv (colour3f);
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colour3f hsv_to_rgb (colour3f);
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// ostream/istream operators
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template <size_t S, typename T>
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std::ostream&
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operator<< (std::ostream&, util::colour<S,T>);
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template <size_t S, typename T>
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std::istream&
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operator>> (std::istream&, util::colour<S,T>&);
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// type name introspection specialisation
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template <size_t S, typename T>
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struct type_name<colour<S,T>> {
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static constexpr const char value[] = "colour";
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};
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}
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#include "colour.ipp"
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#endif
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