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Add trivial rgba colour class

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This commit is contained in:
Danny Robson 2011-09-13 15:14:12 +10:00
parent 7d32257fa2
commit ee1439e5fc
3 changed files with 100 additions and 0 deletions
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2
Makefile.am
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@ -10,6 +10,7 @@ UTIL_INCLUDE = \
annotations.hpp \
backtrace.hpp \
bitwise.hpp \
colour.hpp \
debug.hpp \
enable_if.hpp \
endian.hpp \
@ -39,6 +40,7 @@ UTIL_INCLUDE = \
UTIL_FILES = \
bitwise.cpp \
colour.cpp \
debug.cpp \
endian.cpp \
except.cpp \

55
colour.cpp Normal file
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@ -0,0 +1,55 @@
/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2010 Danny Robson <danny@blubinc.net>
*/
#include "colour.hpp"
#include "range.hpp"
using namespace util;
colour::colour (double _red, double _green, double _blue, double _alpha):
red (_red),
green (_green),
blue (_blue),
alpha (_alpha)
{ ; }
namespace util {
template<>
colour
random (void) {
return colour (range<double>::UNIT.rand (),
range<double>::UNIT.rand (),
range<double>::UNIT.rand (),
range<double>::UNIT.rand ());
}
template <>
colour&
randomise (colour &c)
{ return c = random<colour> (); }
}
std::ostream&
operator<< (std::ostream &os, const util::colour &c) {
os << "colour(" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha << ")";
return os;
}

43
colour.hpp Normal file
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@ -0,0 +1,43 @@
/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2010 Danny Robson <danny@blubinc.net>
*/
#ifndef __UTIL_COLOUR_HPP
#define __UTIL_COLOUR_HPP
#include "random.hpp"
#include <iostream>
namespace util {
struct colour {
colour (double red, double green, double blue, double alpha = 1.0);
double red;
double green;
double blue;
double alpha;
};
template <> colour& randomise (colour&);
template <> colour& random (void);
}
std::ostream& operator<< (std::ostream&, const util::colour&);
#endif