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< h1 class = "page-title" > Source: utils/Color.js< / h1 >
< section >
< article >
< pre class = "sunlight-highlight-javascript linenums" > /**
* @author Richard Davey < rich@photonstorm.com>
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* @copyright 2014 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* A collection of methods useful for manipulating and comparing colors.
*
* @class Phaser.Color
*/
Phaser.Color = {
/**
* Given an alpha and 3 color values this will return an integer representation of it.
*
* @method Phaser.Color.getColor32
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* @static
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* @param {number} alpha - The Alpha value (between 0 and 255).
* @param {number} red - The Red channel value (between 0 and 255).
* @param {number} green - The Green channel value (between 0 and 255).
* @param {number} blue - The Blue channel value (between 0 and 255).
* @returns {number} A native color value integer (format: 0xAARRGGBB).
*/
getColor32: function (alpha, red, green, blue) {
return alpha < < 24 | red < < 16 | green < < 8 | blue;
},
/**
* Given 3 color values this will return an integer representation of it.
*
* @method Phaser.Color.getColor
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* @static
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* @param {number} red - The Red channel value (between 0 and 255).
* @param {number} green - The Green channel value (between 0 and 255).
* @param {number} blue - The Blue channel value (between 0 and 255).
* @returns {number} A native color value integer (format: 0xRRGGBB).
*/
getColor: function (red, green, blue) {
return red < < 16 | green < < 8 | blue;
},
/**
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* Converts the given hex string into an integer color value.
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*
* @method Phaser.Color.hexToRGB
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* @static
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* @param {string} h - The string hex color to convert.
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* @returns {number} The rgb color value.
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*/
hexToRGB: function (h) {
var hex16 = (h.charAt(0) == "#") ? h.substring(1, 7) : h;
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if (hex16.length == 3)
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{
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hex16 = hex16.charAt(0) + hex16.charAt(0) + hex16.charAt(1) + hex16.charAt(1) + hex16.charAt(2) + hex16.charAt(2);
}
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var red = parseInt(hex16.substring(0, 2), 16);
var green = parseInt(hex16.substring(2, 4), 16);
var blue = parseInt(hex16.substring(4, 6), 16);
return red < < 16 | green < < 8 | blue;
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},
/**
* Returns a string containing handy information about the given color including string hex value,
* RGB format information and HSL information. Each section starts on a newline, 3 lines in total.
*
* @method Phaser.Color.getColorInfo
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* @static
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* @param {number} color - A color value in the format 0xAARRGGBB.
* @returns {string} String containing the 3 lines of information.
*/
getColorInfo: function (color) {
var argb = Phaser.Color.getRGB(color);
var hsl = Phaser.Color.RGBtoHSV(color);
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// Hex format
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var result = Phaser.Color.RGBtoHexstring(color) + "\n";
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// RGB format
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result = result.concat("Alpha: " + argb.alpha + " Red: " + argb.red + " Green: " + argb.green + " Blue: " + argb.blue) + "\n";
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// HSL info
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result = result.concat("Hue: " + hsl.hue + " Saturation: " + hsl.saturation + " Lightnes: " + hsl.lightness);
return result;
},
/**
* Return a string representation of the color in the format 0xAARRGGBB.
*
* @method Phaser.Color.RGBtoHexstring
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* @static
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* @param {number} color - The color to get the string representation for
* @returns {string} A string of length 10 characters in the format 0xAARRGGBB
*/
RGBtoHexstring: function (color) {
var argb = Phaser.Color.getRGB(color);
return "0x" + Phaser.Color.colorToHexstring(argb.alpha) + Phaser.Color.colorToHexstring(argb.red) + Phaser.Color.colorToHexstring(argb.green) + Phaser.Color.colorToHexstring(argb.blue);
},
/**
* Return a string representation of the color in the format #RRGGBB.
*
* @method Phaser.Color.RGBtoWebstring
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* @static
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* @param {number} color - The color to get the string representation for.
* @returns {string} A string of length 10 characters in the format 0xAARRGGBB.
*/
RGBtoWebstring: function (color) {
var argb = Phaser.Color.getRGB(color);
return "#" + Phaser.Color.colorToHexstring(argb.red) + Phaser.Color.colorToHexstring(argb.green) + Phaser.Color.colorToHexstring(argb.blue);
},
/**
* Return a string containing a hex representation of the given color.
*
* @method Phaser.Color.colorToHexstring
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* @static
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* @param {number} color - The color channel to get the hex value for, must be a value between 0 and 255).
* @returns {string} A string of length 2 characters, i.e. 255 = FF, 0 = 00.
*/
colorToHexstring: function (color) {
var digits = "0123456789ABCDEF";
var lsd = color % 16;
var msd = (color - lsd) / 16;
var hexified = digits.charAt(msd) + digits.charAt(lsd);
return hexified;
},
/**
* Interpolates the two given colours based on the supplied step and currentStep properties.
* @method Phaser.Color.interpolateColor
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* @static
* @param {number} color1 - The first color value.
* @param {number} color2 - The second color value.
* @param {number} steps - The number of steps to run the interpolation over.
* @param {number} currentStep - The currentStep value. If the interpolation will take 100 steps, a currentStep value of 50 would be half-way between the two.
* @param {number} alpha - The alpha of the returned color.
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* @returns {number} The interpolated color value.
*/
interpolateColor: function (color1, color2, steps, currentStep, alpha) {
if (typeof alpha === "undefined") { alpha = 255; }
var src1 = Phaser.Color.getRGB(color1);
var src2 = Phaser.Color.getRGB(color2);
var r = (((src2.red - src1.red) * currentStep) / steps) + src1.red;
var g = (((src2.green - src1.green) * currentStep) / steps) + src1.green;
var b = (((src2.blue - src1.blue) * currentStep) / steps) + src1.blue;
return Phaser.Color.getColor32(alpha, r, g, b);
},
/**
* Interpolates the two given colours based on the supplied step and currentStep properties.
* @method Phaser.Color.interpolateColorWithRGB
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* @static
* @param {number} color - The first color value.
* @param {number} r - The red color value, between 0 and 0xFF (255).
* @param {number} g - The green color value, between 0 and 0xFF (255).
* @param {number} b - The blue color value, between 0 and 0xFF (255).
* @param {number} steps - The number of steps to run the interpolation over.
* @param {number} currentStep - The currentStep value. If the interpolation will take 100 steps, a currentStep value of 50 would be half-way between the two.
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* @returns {number} The interpolated color value.
*/
interpolateColorWithRGB: function (color, r, g, b, steps, currentStep) {
var src = Phaser.Color.getRGB(color);
var or = (((r - src.red) * currentStep) / steps) + src.red;
var og = (((g - src.green) * currentStep) / steps) + src.green;
var ob = (((b - src.blue) * currentStep) / steps) + src.blue;
return Phaser.Color.getColor(or, og, ob);
},
/**
* Interpolates the two given colours based on the supplied step and currentStep properties.
* @method Phaser.Color.interpolateRGB
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* @static
* @param {number} r1 - The red color value, between 0 and 0xFF (255).
* @param {number} g1 - The green color value, between 0 and 0xFF (255).
* @param {number} b1 - The blue color value, between 0 and 0xFF (255).
* @param {number} r2 - The red color value, between 0 and 0xFF (255).
* @param {number} g2 - The green color value, between 0 and 0xFF (255).
* @param {number} b2 - The blue color value, between 0 and 0xFF (255).
* @param {number} steps - The number of steps to run the interpolation over.
* @param {number} currentStep - The currentStep value. If the interpolation will take 100 steps, a currentStep value of 50 would be half-way between the two.
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* @returns {number} The interpolated color value.
*/
interpolateRGB: function (r1, g1, b1, r2, g2, b2, steps, currentStep) {
var r = (((r2 - r1) * currentStep) / steps) + r1;
var g = (((g2 - g1) * currentStep) / steps) + g1;
var b = (((b2 - b1) * currentStep) / steps) + b1;
return Phaser.Color.getColor(r, g, b);
},
/**
* Returns a random color value between black and white
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* Set the min value to start each channel from the given offset.
* Set the max value to restrict the maximum color used per channel.
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*
* @method Phaser.Color.getRandomColor
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* @static
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* @param {number} min - The lowest value to use for the color.
* @param {number} max - The highest value to use for the color.
* @param {number} alpha - The alpha value of the returning color (default 255 = fully opaque).
* @returns {number} 32-bit color value with alpha.
*/
getRandomColor: function (min, max, alpha) {
if (typeof min === "undefined") { min = 0; }
if (typeof max === "undefined") { max = 255; }
if (typeof alpha === "undefined") { alpha = 255; }
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// Sanity checks
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if (max > 255) {
return Phaser.Color.getColor(255, 255, 255);
}
if (min > max) {
return Phaser.Color.getColor(255, 255, 255);
}
var red = min + Math.round(Math.random() * (max - min));
var green = min + Math.round(Math.random() * (max - min));
var blue = min + Math.round(Math.random() * (max - min));
return Phaser.Color.getColor32(alpha, red, green, blue);
},
/**
* Return the component parts of a color as an Object with the properties alpha, red, green, blue
*
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* Alpha will only be set if it exist in the given color (0xAARRGGBB)
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*
* @method Phaser.Color.getRGB
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* @static
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* @param {number} color - Color in RGB (0xRRGGBB) or ARGB format (0xAARRGGBB).
* @returns {object} An Object with properties: alpha, red, green, blue.
*/
getRGB: function (color) {
return {
alpha: color >>> 24,
red: color >> 16 & 0xFF,
green: color >> 8 & 0xFF,
blue: color & 0xFF
};
},
/**
* Returns a CSS friendly string value from the given color.
* @method Phaser.Color.getWebRGB
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* @static
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* @param {number} color
* @returns {string}A string in the format: 'rgba(r,g,b,a)'
*/
getWebRGB: function (color) {
var alpha = (color >>> 24) / 255;
var red = color >> 16 & 0xFF;
var green = color >> 8 & 0xFF;
var blue = color & 0xFF;
return 'rgba(' + red.toString() + ',' + green.toString() + ',' + blue.toString() + ',' + alpha.toString() + ')';
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},
/**
* Given a native color value (in the format 0xAARRGGBB) this will return the Alpha component, as a value between 0 and 255.
*
* @method Phaser.Color.getAlpha
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* @static
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* @param {number} color - In the format 0xAARRGGBB.
* @returns {number} The Alpha component of the color, will be between 0 and 1 (0 being no Alpha (opaque), 1 full Alpha (transparent)).
*/
getAlpha: function (color) {
return color >>> 24;
},
/**
* Given a native color value (in the format 0xAARRGGBB) this will return the Alpha component as a value between 0 and 1.
*
* @method Phaser.Color.getAlphaFloat
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* @static
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* @param {number} color - In the format 0xAARRGGBB.
* @returns {number} The Alpha component of the color, will be between 0 and 1 (0 being no Alpha (opaque), 1 full Alpha (transparent)).
*/
getAlphaFloat: function (color) {
return (color >>> 24) / 255;
},
/**
* Given a native color value (in the format 0xAARRGGBB) this will return the Red component, as a value between 0 and 255.
*
* @method Phaser.Color.getRed
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* @static
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* @param {number} color In the format 0xAARRGGBB.
* @returns {number} The Red component of the color, will be between 0 and 255 (0 being no color, 255 full Red).
*/
getRed: function (color) {
return color >> 16 & 0xFF;
},
/**
* Given a native color value (in the format 0xAARRGGBB) this will return the Green component, as a value between 0 and 255.
*
* @method Phaser.Color.getGreen
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* @static
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* @param {number} color - In the format 0xAARRGGBB.
* @returns {number} The Green component of the color, will be between 0 and 255 (0 being no color, 255 full Green).
*/
getGreen: function (color) {
return color >> 8 & 0xFF;
},
/**
* Given a native color value (in the format 0xAARRGGBB) this will return the Blue component, as a value between 0 and 255.
*
* @method Phaser.Color.getBlue
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* @static
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* @param {number} color - In the format 0xAARRGGBB.
* @returns {number} The Blue component of the color, will be between 0 and 255 (0 being no color, 255 full Blue).
*/
getBlue: function (color) {
return color & 0xFF;
}
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};
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