if (H > 360){ H -= 360; }	return [L, C, H];}dojo.gfx.Colorspace.prototype.LCHab_to_Lab = function(){	var src = this.munge('LCH', arguments);	var H_rad = src.H * (Math.PI / 180);	var L = src.L;	var a = src.C / Math.pow(Math.pow(Math.tan(H_rad), 2) + 1, 0.5);	if ((90 < src.H) && (src.H < 270)){ a= -a; }	var b = Math.pow(Math.pow(src.C, 2) - Math.pow(a, 2), 0.5);	if (src.H > 180){ b = -b; }	return [L, a, b];}////////////////////////////////////////////////////////////////////////////////////////////////////////// this function converts an XYZ color array (col) from one whitepoint (src_w) to another (dst_w)//dojo.gfx.Colorspace.prototype.chromaticAdaptation = function(col, src_w, dst_w){	col = this.munge('XYZ', [col]);	var old_wp = this.whitePoint;	this.whitePoint = src_w;	var wp_src = this.getWhitePoint();	this.whitePoint = dst_w;	var wp_dst = this.getWhitePoint();	this.whitePoint = old_wp;	switch(this.chromaticAdaptationAlg){		case 'xyz_scaling':			var ma = [[1,0,0],[0,1,0],[0,0,1]];			var mai = [[1,0,0],[0,1,0],[0,0,1]];			break;		case 'bradford':			var ma = [[0.8951, -0.7502, 0.0389],[0.2664, 1.7135, -0.0685],[-0.1614, 0.0367, 1.0296]];			var mai = [[0.986993, 0.432305, -0.008529],[-0.147054, 0.518360, 0.040043],[0.159963, 0.049291, 0.968487]];			break;		case 'von_kries':			var ma = [[0.40024, -0.22630, 0.00000],[0.70760, 1.16532, 0.00000],[-0.08081, 0.04570, 0.91822]]			var mai = [[1.859936, 0.361191, 0.000000],[-1.129382, 0.638812, 0.000000],[0.219897, -0.000006, 1.089064]]			break;		default:			dojo.debug("The "+this.chromaticAdaptationAlg+" chromatic adaptation algorithm matricies are not defined");	}	var domain_src = dojo.math.matrix.multiply( [[wp_src.x, wp_src.y, wp_src.z]], ma);	var domain_dst = dojo.math.matrix.multiply( [[wp_dst.x, wp_dst.y, wp_dst.z]], ma);	var centre = [		[domain_dst[0][0]/domain_src[0][0], 0, 0],		[0, domain_dst[0][1]/domain_src[0][1], 0],		[0, 0, domain_dst[0][2]/domain_src[0][2]]	];	var m = dojo.math.matrix.multiply( dojo.math.matrix.multiply( ma, centre ), mai );	var dst = dojo.math.matrix.multiply( [[ col.X, col.Y, col.Z ]], m );	return dst[0];}//////////////////////////////////////////////////////////////////////////////////////////////////////dojo.gfx.Colorspace.prototype.getRGB_XYZ_Matrix = function(){	var wp = this.getWhitePoint();	var pr = this.getPrimaries();	var Xr = pr.xr / pr.yr;	var Yr = 1;	var Zr = (1 - pr.xr - pr.yr) / pr.yr;	var Xg = pr.xg / pr.yg;	var Yg = 1;	var Zg = (1 - pr.xg - pr.yg) / pr.yg;	var Xb = pr.xb / pr.yb;	var Yb = 1;	var Zb = (1 - pr.xb - pr.yb) / pr.yb;	var m1 = [[Xr, Yr, Zr],[Xg, Yg, Zg],[Xb, Yb, Zb]];	var m2 = [[wp.X, wp.Y, wp.Z]];	var sm = dojo.math.matrix.multiply(m2, dojo.math.matrix.inverse(m1));	var Sr = sm[0][0];	var Sg = sm[0][1];	var Sb = sm[0][2];	var m4 = [[Sr*Xr, Sr*Yr, Sr*Zr],		  [Sg*Xg, Sg*Yg, Sg*Zg],		  [Sb*Xb, Sb*Yb, Sb*Zb]];	return m4;}dojo.gfx.Colorspace.prototype.getXYZ_RGB_Matrix = function(){	var m = this.getRGB_XYZ_Matrix();	return dojo.math.matrix.inverse(m);}dojo.gfx.Colorspace.prototype.XYZ_to_Luv = function(){	var src = this.munge('XYZ', arguments);	var wp = this.getWhitePoint();	var ud = (4 * src.X) / (src.X + 15 * src.Y + 3 * src.Z);	var vd = (9 * src.Y) / (src.X + 15 * src.Y + 3 * src.Z);	var udr = (4 * wp.X) / (wp.X + 15 * wp.Y + 3 * wp.Z);	var vdr = (9 * wp.Y) / (wp.X + 15 * wp.Y + 3 * wp.Z);	var yr = src.Y / wp.Y;	var L = (yr > this.epsilon()) ? 116 * Math.pow(yr, 1/3) - 16 : this.kappa() * yr;	var u = 13 * L * (ud-udr);	var v = 13 * L * (vd-vdr);	return [L, u, v];}dojo.gfx.Colorspace.prototype.Luv_to_XYZ = function(){	var src = this.munge('Luv', arguments);	var wp = this.getWhitePoint();	var uz = (4 * wp.X) / (wp.X + 15 * wp.Y + 3 * wp.Z);	var vz = (9 * wp.Y) / (wp.X + 15 * wp.Y + 3 * wp.Z);	var Y = (src.L > this.kappa() * this.epsilon()) ? Math.pow((src.L + 16) / 116, 3) : src.L / this.kappa();	var a = (1 / 3) * (((52 * src.L) / (src.u + 13 * src.L * uz)) - 1);	var b = -5 * Y;	var c = - (1 / 3);	var d = Y * (((39 * src.L) / (src.v + 13 * src.L * vz)) - 5);	var X = (d - b) / (a - c);	var Z = X * a + b;	return [X, Y, Z];}dojo.gfx.Colorspace.prototype.Luv_to_LCHuv = function(){	var src = this.munge('Luv', arguments);	var L = src.L;	var C = Math.pow(src.u * src.u + src.v * src.v, 0.5);	var H = Math.atan2(src.v, src.u) * (180 / Math.PI);	if (H < 0){ H += 360; }	if (H > 360){ H -= 360; }	return [L, C, H];}dojo.gfx.Colorspace.prototype.LCHuv_to_Luv = function(){	var src = this.munge('LCH', arguments);	var H_rad = src.H * (Math.PI / 180);	var L = src.L;	var u = src.C / Math.pow(Math.pow(Math.tan(H_rad), 2) + 1, 0.5);	var v = Math.pow(src.C * src.C - u * u, 0.5);	if ((90 < src.H) && (src.H < 270)){ u *= -1; }	if (src.H > 180){ v *= -1; }	return [L, u, v];}dojo.gfx.Colorspace.colorTemp_to_whitePoint = function(T){	if (T < 4000){		dojo.debug("Can't find a white point for temperatures under 4000K");		return [0,0];	}	if (T > 25000){		dojo.debug("Can't find a white point for temperatures over 25000K");		return [0,0];	}	var T1 = T;	var T2 = T * T;	var T3 = T2 * T;	var ten9 = Math.pow(10, 9);	var ten6 = Math.pow(10, 6);	var ten3 = Math.pow(10, 3);	if (T <= 7000){		var x = (-4.6070 * ten9 / T3) + (2.9678 * ten6 / T2) + (0.09911 * ten3 / T) + 0.244063;	}else{		var x = (-2.0064 * ten9 / T3) + (1.9018 * ten6 / T2) + (0.24748 * ten3 / T) + 0.237040;	}	var y = -3.000 * x * x + 2.870 * x - 0.275;	return [x, y];}dojo.gfx.Colorspace.prototype.RGB_to_CMY = function(){	var src = this.munge('RGB', arguments);	var C = 1 - src.R;	var M = 1 - src.G;	var Y = 1 - src.B;	return [C, M, Y];}dojo.gfx.Colorspace.prototype.CMY_to_RGB = function(){	var src = this.munge('CMY', arguments);	var R = 1 - src.C;	var G = 1 - src.M;	var B = 1 - src.Y;	return [R, G, B];}dojo.gfx.Colorspace.prototype.RGB_to_CMYK = function(){	var src = this.munge('RGB', arguments);	var K = Math.min(1-src.R, 1-src.G, 1-src.B);	var C = (1 - src.R - K) / (1 - K);	var M = (1 - src.G - K) / (1 - K);	var Y = (1 - src.B - K) / (1 - K);	return [C, M, Y, K];}dojo.gfx.Colorspace.prototype.CMYK_to_RGB = function(){	var src = this.munge('CMYK', arguments);	var R = 1 - Math.min(1, src.C * (1-src.K) + src.K);	var G = 1 - Math.min(1, src.M * (1-src.K) + src.K);	var B = 1 - Math.min(1, src.Y * (1-src.K) + src.K);	return [R, G, B];}dojo.gfx.Colorspace.prototype.CMY_to_CMYK = function(){	var src = this.munge('CMY', arguments);	var K = Math.min(src.C, src.M, src.Y);	var C = (src.C - K) / (1 - K);	var M = (src.M - K) / (1 - K);	var Y = (src.Y - K) / (1 - K);	return [C, M, Y, K];}dojo.gfx.Colorspace.prototype.CMYK_to_CMY = function(){	var src = this.munge('CMYK', arguments);	var C = Math.min(1, src.C * (1-src.K) + src.K);	var M = Math.min(1, src.M * (1-src.K) + src.K);	var Y = Math.min(1, src.Y * (1-src.K) + src.K);	return [C, M, Y];}dojo.gfx.Colorspace.prototype.RGB_to_HSV = function(){	var src = this.munge('RGB', arguments);	// Based on C Code in "Computer Graphics -- Principles and Practice,"	// Foley et al, 1996, p. 592. 	var min = Math.min(src.R, src.G, src.B);	var V = Math.max(src.R, src.G, src.B);	var delta = V - min;	var H = null;	var S = (V == 0) ? 0 : delta / V;	if (S == 0){		H = 0;	}else{		if (src.R == V){			H = 60 * (src.G - src.B) / delta;		}else{			if (src.G == V){				H = 120 + 60 * (src.B - src.R) / delta;			}else{				if (src.B == V){					// between magenta and cyan					H = 240 + 60 * (src.R - src.G) / delta;				}			}		}		if (H < 0){			H += 360;		}	}	H = (H == 0) ? 360 : H;	return [H, S, V];}dojo.gfx.Colorspace.prototype.HSV_to_RGB = function(){	var src = this.munge('HSV', arguments);	if (src.H == 360){ src.H = 0;}	// Based on C Code in "Computer Graphics -- Principles and Practice,"	// Foley et al, 1996, p. 593.	var r = null;	var g = null;	var b = null;	if (src.S == 0){		// color is on black-and-white center line		// achromatic: shades of gray		var R = src.V;		var G = src.V;		var B = src.V;	}else{		// chromatic color		var hTemp = src.H / 60;		// h is now IN [0,6]		var i = Math.floor(hTemp);	// largest integer <= h		var f = hTemp - i;		// fractional part of h		var p = src.V * (1 - src.S);		var q = src.V * (1 - (src.S * f));		var t = src.V * (1 - (src.S * (1 - f)));		switch(i){			case 0: R = src.V; G = t    ; B = p    ; break;			case 1: R = q    ; G = src.V; B = p    ; break;			case 2: R = p    ; G = src.V; B = t    ; break;			case 3: R = p    ; G = q    ; B = src.V; break;			case 4: R = t    ; G = p    ; B = src.V; break;			case 5: R = src.V; G = p    ; B = q    ; break;		}	}	return [R, G, B];}dojo.gfx.Colorspace.prototype.RGB_to_HSL = function(){	var src = this.munge('RGB', arguments);	// based on C code from http://astronomy.swin.edu.au/~pbourke/colour/hsl/	var min = Math.min(src.R, src.G, src.B);	var max = Math.max(src.R, src.G, src.B);	var delta = max - min;	var H = 0;	var S = 0;	var L = (min + max) / 2;	if ((L > 0) && (L < 1)){		S = delta / ((L < 0.5) ? (2 * L) : (2 - 2 * L));	}	if (delta > 0) {		if ((max == src.R) && (max != src.G)){			H += (src.G - src.B) / delta;		}		if ((max == src.G) && (max != src.B)){			H += (2 + (src.B - src.R) / delta);		}		if ((max == src.B) && (max != src.R)){			H += (4 + (src.R - src.G) / delta);		}		H *= 60;	}	H = (H == 0) ? 360 : H;	return [H, S, L];}dojo.gfx.Colorspace.prototype.HSL_to_RGB = function(){	var src = this.munge('HSL', arguments);	// based on C code from http://astronomy.swin.edu.au/~pbourke/colour/hsl/	while (src.H < 0){ src.H += 360; }	while (src.H >= 360){ src.H -= 360; }	var R = 0;	var G = 0;	var B = 0;	if (src.H < 120){		R = (120 - src.H) / 60;		G = src.H / 60;		B = 0;	}else if (src.H < 240){		R = 0;		G = (240 - src.H) / 60;		B = (src.H - 120) / 60;	}else{		R = (src.H - 240) / 60;		G = 0;		B = (360 - src.H) / 60;	}	R = 2 * src.S * Math.min(R, 1) + (1 - src.S);	G = 2 * src.S * Math.min(G, 1) + (1 - src.S);	B = 2 * src.S * Math.min(B, 1) + (1 - src.S);	if (src.L < 0.5){		R = src.L * R;		G = src.L * G;		B = src.L * B;	}else{		R = (1 - src.L) * R + 2 * src.L - 1;		G = (1 - src.L) * G + 2 * src.L - 1;		B = (1 - src.L) * B + 2 * src.L - 1;	}	return [R, G, B];}