257 lines
6.9 KiB
C
257 lines
6.9 KiB
C
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
|
||
|
|
// Digital Ltd. LLC
|
||
|
|
//
|
||
|
|
// All rights reserved.
|
||
|
|
//
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are
|
||
|
|
// met:
|
||
|
|
// * Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// * Redistributions in binary form must reproduce the above
|
||
|
|
// copyright notice, this list of conditions and the following disclaimer
|
||
|
|
// in the documentation and/or other materials provided with the
|
||
|
|
// distribution.
|
||
|
|
// * Neither the name of Industrial Light & Magic nor the names of
|
||
|
|
// its contributors may be used to endorse or promote products derived
|
||
|
|
// from this software without specific prior written permission.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
//
|
||
|
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef INCLUDED_IMATHCOLORALGO_H
|
||
|
|
#define INCLUDED_IMATHCOLORALGO_H
|
||
|
|
|
||
|
|
|
||
|
|
#include "ImathColor.h"
|
||
|
|
#include "ImathMath.h"
|
||
|
|
#include "ImathLimits.h"
|
||
|
|
|
||
|
|
namespace Imath {
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Non-templated helper routines for color conversion.
|
||
|
|
// These routines eliminate type warnings under g++.
|
||
|
|
//
|
||
|
|
|
||
|
|
Vec3<double> hsv2rgb_d(const Vec3<double> &hsv);
|
||
|
|
|
||
|
|
Color4<double> hsv2rgb_d(const Color4<double> &hsv);
|
||
|
|
|
||
|
|
|
||
|
|
Vec3<double> rgb2hsv_d(const Vec3<double> &rgb);
|
||
|
|
|
||
|
|
Color4<double> rgb2hsv_d(const Color4<double> &rgb);
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Color conversion functions and general color algorithms
|
||
|
|
//
|
||
|
|
// hsv2rgb(), rgb2hsv(), rgb2packed(), packed2rgb()
|
||
|
|
// see each funtion definition for details.
|
||
|
|
//
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
Vec3<T>
|
||
|
|
hsv2rgb(const Vec3<T> &hsv)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
Vec3<double> v = Vec3<double>(hsv.x / double(limits<T>::max()),
|
||
|
|
hsv.y / double(limits<T>::max()),
|
||
|
|
hsv.z / double(limits<T>::max()));
|
||
|
|
Vec3<double> c = hsv2rgb_d(v);
|
||
|
|
return Vec3<T>((T) (c.x * limits<T>::max()),
|
||
|
|
(T) (c.y * limits<T>::max()),
|
||
|
|
(T) (c.z * limits<T>::max()));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Vec3<double> v = Vec3<double>(hsv.x, hsv.y, hsv.z);
|
||
|
|
Vec3<double> c = hsv2rgb_d(v);
|
||
|
|
return Vec3<T>((T) c.x, (T) c.y, (T) c.z);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
Color4<T>
|
||
|
|
hsv2rgb(const Color4<T> &hsv)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
Color4<double> v = Color4<double>(hsv.r / float(limits<T>::max()),
|
||
|
|
hsv.g / float(limits<T>::max()),
|
||
|
|
hsv.b / float(limits<T>::max()),
|
||
|
|
hsv.a / float(limits<T>::max()));
|
||
|
|
Color4<double> c = hsv2rgb_d(v);
|
||
|
|
return Color4<T>((T) (c.r * limits<T>::max()),
|
||
|
|
(T) (c.g * limits<T>::max()),
|
||
|
|
(T) (c.b * limits<T>::max()),
|
||
|
|
(T) (c.a * limits<T>::max()));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Color4<double> v = Color4<double>(hsv.r, hsv.g, hsv.b, hsv.a);
|
||
|
|
Color4<double> c = hsv2rgb_d(v);
|
||
|
|
return Color4<T>((T) c.r, (T) c.g, (T) c.b, (T) c.a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
Vec3<T>
|
||
|
|
rgb2hsv(const Vec3<T> &rgb)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
Vec3<double> v = Vec3<double>(rgb.x / double(limits<T>::max()),
|
||
|
|
rgb.y / double(limits<T>::max()),
|
||
|
|
rgb.z / double(limits<T>::max()));
|
||
|
|
Vec3<double> c = rgb2hsv_d(v);
|
||
|
|
return Vec3<T>((T) (c.x * limits<T>::max()),
|
||
|
|
(T) (c.y * limits<T>::max()),
|
||
|
|
(T) (c.z * limits<T>::max()));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Vec3<double> v = Vec3<double>(rgb.x, rgb.y, rgb.z);
|
||
|
|
Vec3<double> c = rgb2hsv_d(v);
|
||
|
|
return Vec3<T>((T) c.x, (T) c.y, (T) c.z);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
Color4<T>
|
||
|
|
rgb2hsv(const Color4<T> &rgb)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
Color4<double> v = Color4<double>(rgb.r / float(limits<T>::max()),
|
||
|
|
rgb.g / float(limits<T>::max()),
|
||
|
|
rgb.b / float(limits<T>::max()),
|
||
|
|
rgb.a / float(limits<T>::max()));
|
||
|
|
Color4<double> c = rgb2hsv_d(v);
|
||
|
|
return Color4<T>((T) (c.r * limits<T>::max()),
|
||
|
|
(T) (c.g * limits<T>::max()),
|
||
|
|
(T) (c.b * limits<T>::max()),
|
||
|
|
(T) (c.a * limits<T>::max()));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Color4<double> v = Color4<double>(rgb.r, rgb.g, rgb.b, rgb.a);
|
||
|
|
Color4<double> c = rgb2hsv_d(v);
|
||
|
|
return Color4<T>((T) c.r, (T) c.g, (T) c.b, (T) c.a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
PackedColor
|
||
|
|
rgb2packed(const Vec3<T> &c)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
float x = c.x / float(limits<T>::max());
|
||
|
|
float y = c.y / float(limits<T>::max());
|
||
|
|
float z = c.z / float(limits<T>::max());
|
||
|
|
return rgb2packed( V3f(x,y,z) );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return ( (PackedColor) (c.x * 255) |
|
||
|
|
(((PackedColor) (c.y * 255)) << 8) |
|
||
|
|
(((PackedColor) (c.z * 255)) << 16) | 0xFF000000 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
PackedColor
|
||
|
|
rgb2packed(const Color4<T> &c)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
float r = c.r / float(limits<T>::max());
|
||
|
|
float g = c.g / float(limits<T>::max());
|
||
|
|
float b = c.b / float(limits<T>::max());
|
||
|
|
float a = c.a / float(limits<T>::max());
|
||
|
|
return rgb2packed( C4f(r,g,b,a) );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return ( (PackedColor) (c.r * 255) |
|
||
|
|
(((PackedColor) (c.g * 255)) << 8) |
|
||
|
|
(((PackedColor) (c.b * 255)) << 16) |
|
||
|
|
(((PackedColor) (c.a * 255)) << 24));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// This guy can't return the result because the template
|
||
|
|
// parameter would not be in the function signiture. So instead,
|
||
|
|
// its passed in as an argument.
|
||
|
|
//
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
void
|
||
|
|
packed2rgb(PackedColor packed, Vec3<T> &out)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
T f = limits<T>::max() / ((PackedColor)0xFF);
|
||
|
|
out.x = (packed & 0xFF) * f;
|
||
|
|
out.y = ((packed & 0xFF00) >> 8) * f;
|
||
|
|
out.z = ((packed & 0xFF0000) >> 16) * f;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
T f = T(1) / T(255);
|
||
|
|
out.x = (packed & 0xFF) * f;
|
||
|
|
out.y = ((packed & 0xFF00) >> 8) * f;
|
||
|
|
out.z = ((packed & 0xFF0000) >> 16) * f;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
void
|
||
|
|
packed2rgb(PackedColor packed, Color4<T> &out)
|
||
|
|
{
|
||
|
|
if ( limits<T>::isIntegral() )
|
||
|
|
{
|
||
|
|
T f = limits<T>::max() / ((PackedColor)0xFF);
|
||
|
|
out.r = (packed & 0xFF) * f;
|
||
|
|
out.g = ((packed & 0xFF00) >> 8) * f;
|
||
|
|
out.b = ((packed & 0xFF0000) >> 16) * f;
|
||
|
|
out.a = ((packed & 0xFF000000) >> 24) * f;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
T f = T(1) / T(255);
|
||
|
|
out.r = (packed & 0xFF) * f;
|
||
|
|
out.g = ((packed & 0xFF00) >> 8) * f;
|
||
|
|
out.b = ((packed & 0xFF0000) >> 16) * f;
|
||
|
|
out.a = ((packed & 0xFF000000) >> 24) * f;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace Imath
|
||
|
|
|
||
|
|
#endif
|