?? 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");dojo.gfx.Colorspace = function () { this.whitePoint = "D65"; this.stdObserver = "10"; this.chromaticAdaptationAlg = "bradford"; this.RGBWorkingSpace = "s_rgb"; this.useApproxCIELabMapping = 1; 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"], "xyY_to_LCHuv":["XYZ", "Luv"], "LCHuv_to_xyY":["Luv", "XYZ"], "Lab_to_LCHuv":["XYZ", "Luv"], "LCHuv_to_Lab":["Luv", "XYZ"], "LCHab_to_LCHuv":["Lab", "XYZ", "Luv"], "LCHuv_to_LCHab":["Luv", "XYZ", "Lab"], "XYZ_to_CMY":["RGB"], "CMY_to_XYZ":["RGB"], "xyY_to_CMY":["RGB"], "CMY_to_xyY":["RGB"], "Lab_to_CMY":["RGB"], "CMY_to_Lab":["RGB"], "LCHab_to_CMY":["RGB"], "CMY_to_LCHab":["RGB"], "Luv_to_CMY":["RGB"], "CMY_to_Luv":["RGB"], "LCHuv_to_CMY":["RGB"], "CMY_to_LCHuv":["RGB"], "XYZ_to_HSL":["RGB"], "HSL_to_XYZ":["RGB"], "xyY_to_HSL":["RGB"], "HSL_to_xyY":["RGB"], "Lab_to_HSL":["RGB"], "HSL_to_Lab":["RGB"], "LCHab_to_HSL":["RGB"], "HSL_to_LCHab":["RGB"], "Luv_to_HSL":["RGB"], "HSL_to_Luv":["RGB"], "LCHuv_to_HSL":["RGB"], "HSL_to_LCHuv":["RGB"], "CMY_to_HSL":["RGB"], "HSL_to_CMY":["RGB"], "CMYK_to_HSL":["RGB"], "HSL_to_CMYK":["RGB"], "XYZ_to_HSV":["RGB"], "HSV_to_XYZ":["RGB"], "xyY_to_HSV":["RGB"], "HSV_to_xyY":["RGB"], "Lab_to_HSV":["RGB"], "HSV_to_Lab":["RGB"], "LCHab_to_HSV":["RGB"], "HSV_to_LCHab":["RGB"], "Luv_to_HSV":["RGB"], "HSV_to_Luv":["RGB"], "LCHuv_to_HSV":["RGB"], "HSV_to_LCHuv":["RGB"], "CMY_to_HSV":["RGB"], "HSV_to_CMY":["RGB"], "CMYK_to_HSV":["RGB"], "HSV_to_CMYK":["RGB"], "HSL_to_HSV":["RGB"], "HSV_to_HSL":["RGB"], "XYZ_to_CMYK":["RGB"], "CMYK_to_XYZ":["RGB"], "xyY_to_CMYK":["RGB"], "CMYK_to_xyY":["RGB"], "Lab_to_CMYK":["RGB"], "CMYK_to_Lab":["RGB"], "LCHab_to_CMYK":["RGB"], "CMYK_to_LCHab":["RGB"], "Luv_to_CMYK":["RGB"], "CMYK_to_Luv":["RGB"], "LCHuv_to_CMYK":["RGB"], "CMYK_to_LCHuv":["RGB"]}; return this;};dojo.gfx.Colorspace.prototype.convert = function (col, model_from, model_to) { var k = model_from + "_to_" + model_to; if (this[k]) { return this[k](col); } else { if (this.chainMaps[k]) { var cur = model_from; var models = this.chainMaps[k].concat(); models.push(model_to); for (var i = 0; i < models.length; i++) { col = this.convert(col, cur, models[i]); cur = models[i]; } return col; } else { dojo.debug("Can't convert from " + model_from + " to " + model_to); } }};dojo.gfx.Colorspace.prototype.munge = function (keys, args) { if (dojo.lang.isArray(args[0])) { args = args[0]; } var out = new Array(); for (var i = 0; i < keys.length; i++) { out[keys.charAt(i)] = args[i]; } return out;};dojo.gfx.Colorspace.prototype.getWhitePoint = function () { var x = 0; var y = 0; var t = 0; switch (this.stdObserver) { case "2": switch (this.whitePoint) { case "E": x = 1 / 3; y = 1 / 3; t = 5400; break; case "D50": x = 0.34567; y = 0.3585; t = 5000; break; case "D55": x = 0.33242; y = 0.34743; t = 5500; break; case "D65": x = 0.31271; y = 0.32902; t = 6500; break; case "D75": x = 0.29902; y = 0.31485; t = 7500; break; case "A": x = 0.44757; y = 0.40745; t = 2856; break; case "B": x = 0.34842; y = 0.35161; t = 4874; break; case "C": x = 0.31006; y = 0.31616; t = 6774; break; case "9300": x = 0.2848; y = 0.2932; t = 9300; break; case "F2": x = 0.37207; y = 0.37512; t = 4200; break; case "F7": x = 0.31285; y = 0.32918; t = 6500; break; case "F11": x = 0.38054; y = 0.37691; t = 4000; break; default: dojo.debug("White point " + this.whitePoint + " isn't defined for Std. Observer " + this.strObserver); } break; case "10": switch (this.whitePoint) { case "E": x = 1 / 3; y = 1 / 3; t = 5400; break; case "D50": x = 0.34773; y = 0.35952; t = 5000; break; case "D55": x = 0.33411; y = 0.34877; t = 5500; break; case "D65": x = 0.31382; y = 0.331; t = 6500; break; case "D75": x = 0.29968; y = 0.3174; t = 7500; break; case "A": x = 0.45117; y = 0.40594; t = 2856; break; case "B": x = 0.3498; y = 0.3527; t = 4874; break; case "C": x = 0.31039; y = 0.31905; t = 6774; break; case "F2": x = 0.37928; y = 0.36723; t = 4200; break; case "F7": x = 0.31565; y = 0.32951; t = 6500; break; case "F11": x = 0.38543; y = 0.3711; t = 4000; break; default: dojo.debug("White point " + this.whitePoint + " isn't defined for Std. Observer " + this.strObserver); } break; default: dojo.debug("Std. Observer " + this.strObserver + " isn't defined"); } var z = 1 - x - y; var wp = {"x":x, "y":y, "z":z, "t":t}; wp.Y = 1; var XYZ = this.xyY_to_XYZ([wp.x, wp.y, wp.Y]); wp.X = XYZ[0]; wp.Y = XYZ[1]; wp.Z = XYZ[2]; return wp;};dojo.gfx.Colorspace.prototype.getPrimaries = function () { var m = []; switch (this.RGBWorkingSpace) { case "adobe_rgb_1998": m = [2.2, "D65", 0.64, 0.33, 0.297361, 0.21, 0.71, 0.627355, 0.15, 0.06, 0.075285]; break; case "apple_rgb": m = [1.8, "D65", 0.625, 0.34, 0.244634, 0.28, 0.595, 0.672034, 0.155, 0.07, 0.083332]; break; case "best_rgb": m = [2.2, "D50", 0.7347, 0.2653, 0.228457, 0.215, 0.775, 0.737352, 0.13, 0.035, 0.034191]; break; case "beta_rgb": m = [2.2, "D50", 0.6888, 0.3112, 0.303273, 0.1986, 0.7551, 0.663786, 0.1265, 0.0352, 0.032941]; break; case "bruce_rgb": m = [2.2, "D65", 0.64, 0.33, 0.240995, 0.28, 0.65, 0.683554, 0.15, 0.06, 0.075452]; break; case "cie_rgb": m = [2.2, "E", 0.735, 0.265, 0.176204, 0.274, 0.717, 0.812985, 0.167, 0.009, 0.010811]; break; case "color_match_rgb": m = [1.8, "D50", 0.63, 0.34, 0.274884, 0.295, 0.605, 0.658132, 0.15, 0.075, 0.066985]; break; case "don_rgb_4": m = [2.2, "D50", 0.696, 0.3, 0.27835, 0.215, 0.765, 0.68797, 0.13, 0.035, 0.03368]; break; case "eci_rgb": m = [1.8, "D50", 0.67, 0.33, 0.32025, 0.21, 0.71, 0.602071, 0.14, 0.08, 0.077679]; break; case "ekta_space_ps5": m = [2.2, "D50", 0.695, 0.305, 0.260629, 0.26, 0.7, 0.734946, 0.11, 0.005, 0.004425]; break; case "ntsc_rgb": m = [2.2, "C", 0.67, 0.33, 0.298839, 0.21, 0.71, 0.586811, 0.14, 0.08, 0.11435]; break; case "pal_secam_rgb": m = [2.2, "D65", 0.64, 0.33, 0.222021, 0.29, 0.6, 0.706645, 0.15, 0.06, 0.071334]; break; case "pro_photo_rgb": m = [1.8, "D50", 0.7347, 0.2653, 0.28804, 0.1596, 0.8404, 0.711874, 0.0366, 0.0001, 0.000086]; break; case "smpte-c_rgb": m = [2.2, "D65", 0.63, 0.34, 0.212395, 0.31, 0.595, 0.701049, 0.155, 0.07, 0.086556]; break; case "s_rgb": m = [2.2, "D65", 0.64, 0.33, 0.212656, 0.3, 0.6, 0.715158, 0.15, 0.06, 0.072186]; break; case "wide_gamut_rgb": m = [2.2, "D50", 0.735, 0.265, 0.258187, 0.115, 0.826, 0.724938, 0.157, 0.018, 0.016875]; break; default: dojo.debug("RGB working space " + this.RGBWorkingSpace + " isn't defined"); } var p = {name:this.RGBWorkingSpace, gamma:m[0], wp:m[1], xr:m[2], yr:m[3], Yr:m[4], xg:m[5], yg:m[6], Yg:m[7], xb:m[8], yb:m[9], Yb:m[10]}; if (p.wp != this.whitePoint) { var r = this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xr, p.yr, p.Yr]), p.wp, this.whitePoint)); var g = this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xg, p.yg, p.Yg]), p.wp, this.whitePoint)); var b = this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xb, p.yb, p.Yb]), p.wp, this.whitePoint)); p.xr = r[0]; p.yr = r[1]; p.Yr = r[2]; p.xg = g[0]; p.yg = g[1]; p.Yg = g[2]; p.xb = b[0]; p.yb = b[1]; p.Yb = b[2]; p.wp = this.whitePoint; } p.zr = 1 - p.xr - p.yr; p.zg = 1 - p.xg - p.yg; p.zb = 1 - p.xb - p.yb; return p;};dojo.gfx.Colorspace.prototype.epsilon = function () { return this.useApproxCIELabMapping ? 0.008856 : 216 / 24289;};dojo.gfx.Colorspace.prototype.kappa = function () { return this.useApproxCIELabMapping ? 903.3 : 24389 / 27;};dojo.gfx.Colorspace.prototype.XYZ_to_xyY = function () { var src = this.munge("XYZ", arguments); var sum = src.X + src.Y + src.Z; if (sum == 0) { var wp = this.getWhitePoint(); var x = wp.x; var y = wp.y; } else { var x = src.X / sum; var y = src.Y / sum; } var Y = src.Y; return [x, y, Y];};dojo.gfx.Colorspace.prototype.xyY_to_XYZ = function () { var src = this.munge("xyY", arguments); if (src.y == 0) { var X = 0; var Y = 0; var Z = 0; } else { var X = (src.x * src.Y) / src.y; var Y = src.Y; var Z = ((1 - src.x - src.y) * src.Y) / src.y; } return [X, Y, Z];};dojo.gfx.Colorspace.prototype.RGB_to_XYZ = function () { var src = this.munge("RGB", arguments); var m = this.getRGB_XYZ_Matrix(); var pr = this.getPrimaries(); if (this.RGBWorkingSpace == "s_rgb") { var r = (src.R > 0.04045) ? Math.pow(((src.R + 0.055) / 1.055), 2.4) : src.R / 12.92; var g = (src.G > 0.04045) ? Math.pow(((src.G + 0.055) / 1.055), 2.4) : src.G / 12.92; var b = (src.B > 0.04045) ? Math.pow(((src.B + 0.055) / 1.055), 2.4) : src.B / 12.92; } else { var r = Math.pow(src.R, pr.gamma); var g = Math.pow(src.G, pr.gamma); var b = Math.pow(src.B, pr.gamma); } var XYZ = dojo.math.matrix.multiply([[r, g, b]], m); return [XYZ[0][0], XYZ[0][1], XYZ[0][2]];};dojo.gfx.Colorspace.prototype.XYZ_to_RGB = function () { var src = this.munge("XYZ", arguments); var mi = this.getXYZ_RGB_Matrix(); var pr = this.getPrimaries(); var rgb = dojo.math.matrix.multiply([[src.X, src.Y, src.Z]], mi); var r = rgb[0][0]; var g = rgb[0][1]; var b = rgb[0][2]; if (this.RGBWorkingSpace == "s_rgb") { var R = (r > 0.0031308) ? (1.055 * Math.pow(r, 1 / 2.4)) - 0.055 : 12.92 * r; var G = (g > 0.0031308) ? (1.055 * Math.pow(g, 1 / 2.4)) - 0.055 : 12.92 * g; var B = (b > 0.0031308) ? (1.055 * Math.pow(b, 1 / 2.4)) - 0.055 : 12.92 * b; } else { var R = Math.pow(r, 1 / pr.gamma); var G = Math.pow(g, 1 / pr.gamma); var B = Math.pow(b, 1 / pr.gamma); } return [R, G, B];};dojo.gfx.Colorspace.prototype.XYZ_to_Lab = function () { var src = this.munge("XYZ", arguments); var wp = this.getWhitePoint(); var xr = src.X / wp.X; var yr = src.Y / wp.Y; var zr = src.Z / wp.Z; var fx = (xr > this.epsilon()) ? Math.pow(xr, 1 / 3) : (this.kappa() * xr + 16) / 116; var fy = (yr > this.epsilon()) ? Math.pow(yr, 1 / 3) : (this.kappa() * yr + 16) / 116; var fz = (zr > this.epsilon()) ? Math.pow(zr, 1 / 3) : (this.kappa() * zr + 16) / 116; var L = 116 * fy - 16; var a = 500 * (fx - fy); var b = 200 * (fy - fz); return [L, a, b];};dojo.gfx.Colorspace.prototype.Lab_to_XYZ = function () { var src = this.munge("Lab", arguments); var wp = this.getWhitePoint(); var yr = (src.L > (this.kappa() * this.epsilon())) ? Math.pow((src.L + 16) / 116, 3) : src.L / this.kappa(); var fy = (yr > this.epsilon()) ? (src.L + 16) / 116 : (this.kappa() * yr + 16) / 116; var fx = (src.a / 500) + fy; var fz = fy - (src.b / 200); var fxcube = Math.pow(fx, 3);?? 快捷鍵說(shuō)明
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