/usr/include/cegui-0.8.7/CEGUI/CommonDialogs/ColourPicker/Conversions.h is in libcegui-mk2-dev 0.8.7-1.3+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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created: 20th February 2010
author: Lukas E Meindl
purpose: Header of the class used to provide conversions between
the ColourPicker colour types
*************************************************************************/
/***************************************************************************
* Copyright (C) 2004 - 2011 Paul D Turner & The CEGUI Development Team
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
***************************************************************************/
#ifndef _CEGUIColourPickerConversions_h_
#define _CEGUIColourPickerConversions_h_
#include "CEGUI/CommonDialogs/Module.h"
#include "CEGUI/CommonDialogs/ColourPicker/Types.h"
#include "CEGUI/Colour.h"
#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable : 4251)
#endif
namespace CEGUI
{
class CEGUI_COMMONDIALOGS_API ColourPickerConversions
{
public:
//! Function for converting an RGB_Colour to a Lab_Colour
static Lab_Colour toLab(RGB_Colour colour);
//! Function for converting an RGB_Colour to an HSV_Colour
static HSV_Colour toHSV(RGB_Colour colour);
//! Function for converting a Lab_Colour to an RGB_Colour
static RGB_Colour toRGB(const Lab_Colour& colour);
//! Function for converting a Lab_Colour to an RGB_Colour
static RGB_Colour toRGB(float L, float a, float b);
//! Function for converting a CEGUI Colour to an RGB_Colour
static RGB_Colour toRGB(const CEGUI::Colour& colour);
//! Function for converting a HSV to an RGB_Colour
static RGB_Colour toRGB(const HSV_Colour& colour);
//! Conversion from RGB_Colour to CEGUI::Colour
static CEGUI::Colour toCeguiColour(const RGB_Colour& colourRGB);
//! Function for calculating X based on the RGB components
static float toX(unsigned char R, unsigned char G, unsigned char B);
//! Function for calculating Y based on the RGB components
static float toY(unsigned char R, unsigned char G, unsigned char B);
//! Function for calculating Z based on the RGB components
static float toZ(unsigned char R, unsigned char G, unsigned char B);
//! Function for calculating X based on the RGB components
static float toX(float R, float G, float B);
//! Function for calculating Y based on the RGB components
static float toY(float R, float G, float B);
//! Function for calculating Z based on the RGB components
static float toZ(float R, float G, float B);
//! Function for calculating L (of CIELab) based on the Y components
static float toL(float Y);
//! Function for calculating a (of CIELab) based on the X and Y components
static float toA(float X, float Y);
//! Function for calculating b (of CIELab) based on the Y and Z components
static float toB(float Y, float Z);
//! Linear interpolation helper function for RGB_Colour
static RGB_Colour linearInterpolationRGB(float interPolBalance,
const RGB_Colour& start,
const RGB_Colour& end);
//! Linear interpolation helper function for Alpha
static unsigned char linearInterpolationAlpha(float interPolBalance,
unsigned char startAlpha,
unsigned char endAlpha);
//! Linear interpolation helper function for Lab_Colour
static Lab_Colour linearInterpolationLab(float interPolBalance,
const Lab_Colour& start,
const Lab_Colour& end);
//! Linear interpolation helper function for HSV_Colour
static HSV_Colour linearInterpolationHSV(float interPolBalance,
const HSV_Colour& start,
const HSV_Colour& end);
private:
//! Clamp function for clamping interpolation values between 0.0 and 1.0
static void clampInterpolationValue(float& interPolBalance);
//! Helper function for the conversion from XYZ to CIELab
static float normCalc(float div);
//! Helper function for the conversion from XYZ to CIELab
static float XNormCalc(float X);
//! Helper function for the conversion from XYZ to CIELab
static float YNormCalc(float Y);
//! Helper function for the conversion from XYZ to CIELab
static float ZNormCalc(float Z);
//! Helper function for clamping values
static void clamp(float& value, float min_val, float max_val);
//! Normed reference values for Lab calculations in accordance with CIELab (D65)
static const float Xn;
static const float Yn;
static const float Zn;
//! Reference value needed in the Lab calculations to check for low
// values of P/Pn (P/Pn < LAB_COMPARE_VALUE_CONST)
static const float LAB_COMPARE_VALUE_CONST;
};
}
#if defined(_MSC_VER)
# pragma warning(pop)
#endif
#endif
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