flymis/WebRoot/dojojs/src/gfx/Colorspace.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.gfx.Colorspace");

dojo.require("dojo.lang.common");
dojo.require("dojo.math.matrix");

// to convert to YUV:
//   c.whitePoint = 'D65';
//   c.RGBWorkingSpace = 'pal_secam_rgb';
//   var out = c.convert([r,g,b], 'RGB', 'XYZ');
//
// to convert to YIQ:
//   c.whitePoint = 'D65';
//   c.RGBWorkingSpace = 'ntsc_rgb';
//   var out = c.convert([r,g,b], 'RGB', 'XYZ');
//

dojo.gfx.Colorspace = function(){
	//	summary
	//	An object for dealing with colorspace conversions.
	this.whitePoint = 'D65';
	this.stdObserver = '10';
	this.chromaticAdaptationAlg = 'bradford';
	this.RGBWorkingSpace = 's_rgb';
	this.useApproxCIELabMapping = 1; // see http://www.brucelindbloom.com/LContinuity.html

	this.chainMaps = {
		'RGB_to_xyY'  : ['XYZ'],
		'xyY_to_RGB'  : ['XYZ'],
		'RGB_to_Lab'  : ['XYZ'],
		'Lab_to_RGB'  : ['XYZ'],
		'RGB_to_LCHab': ['XYZ', 'Lab'],
		'LCHab_to_RGB': ['Lab'],
		'xyY_to_Lab'  : ['XYZ'],
		'Lab_to_xyY'  : ['XYZ'],
		'XYZ_to_LCHab': ['Lab'],
		'LCHab_to_XYZ': ['Lab'],
		'xyY_to_LCHab': ['XYZ', 'Lab'],
		'LCHab_to_xyY': ['Lab', 'XYZ'],
		'RGB_to_Luv'  : ['XYZ'],
		'Luv_to_RGB'  : ['XYZ'],
		'xyY_to_Luv'  : ['XYZ'],
		'Luv_to_xyY'  : ['XYZ'],
		'Lab_to_Luv'  : ['XYZ'],
		'Luv_to_Lab'  : ['XYZ'],
		'LCHab_to_Luv': ['Lab', 'XYZ'],
		'Luv_to_LCHab': ['XYZ', 'Lab'],
		'RGB_to_LCHuv'  : ['XYZ', 'Luv'],
		'LCHuv_to_RGB'  : ['Luv', 'XYZ'],
		'XYZ_to_LCHuv'  : ['Luv'],
		'LCHuv_to_XYZ'  : ['Luv'],
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