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color_Color32.js.html
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<h1 class="page-title">Source: color/Color32.js</h1>
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<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new 32-bit RGB color.
*
* @constructor
* @extends rune.color.Color24
*
* @param {number} [r=0] The red component.
* @param {number} [g=0] The green component.
* @param {number} [b=0] The blue component.
* @param {number} [a=0] The alpha component.
*
* @class
* @classdesc
*
* Represents a 32-bit RGB color. A color consists of four 8-bit components;
* red, green, blue and alpha.
*/
rune.color.Color32 = function(r, g, b, a) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* The alpha component.
*
* @type {rune.color.ColorComponent}
* @private
*/
this.m_a = new rune.color.ColorComponent(a | 0xff);
//--------------------------------------------------------------------------
// Super call
//--------------------------------------------------------------------------
/**
* Extend Color24.
*/
rune.color.Color24.call(this, r, g, b);
};
//------------------------------------------------------------------------------
// Inheritance
//------------------------------------------------------------------------------
rune.color.Color32.prototype = Object.create(rune.color.Color24.prototype);
rune.color.Color32.prototype.constructor = rune.color.Color32;
//------------------------------------------------------------------------------
// Public static methods
//------------------------------------------------------------------------------
/**
* Creates and returns a new Color32 object, based on a hexadecimal value,
* specified in string format.
*
* @param {string} s String-based color code (as hexadecimal).
*
* @return {rune.color.Color32}
*/
rune.color.Color32.fromHex = function(s) {
if (typeof s !== "string") {
throw new TypeError("Argument must be of type string.");
}
s = s.replace("#", "");
if (s.length < 8) {
throw new Error("Color must be specified as a 32 bit value.");
}
var a = parseInt(s.substring(0, 2), 16);
var r = parseInt(s.substring(2, 4), 16);
var g = parseInt(s.substring(4, 6), 16);
var b = parseInt(s.substring(6, 8), 16);
return new rune.color.Color32(
r,
g,
b,
a
);
}
//------------------------------------------------------------------------------
// Public prototype getter and setter methods
//------------------------------------------------------------------------------
/**
* The alpha component (in 8 bits), ie, a value between 0 and 255.
*
* @member {rune.util.ColorComponent} alpha
* @memberof rune.color.Color32
* @instance
* @readonly
*/
Object.defineProperty(rune.color.Color32.prototype, "a", {
/**
* @this rune.color.Color32
* @ignore
*/
get : function() {
return this.m_a;
}
});
//------------------------------------------------------------------------------
// Override public prototype methods (API)
//------------------------------------------------------------------------------
/**
* @inheritDoc
*/
rune.color.Color32.prototype.dispose = function() {
rune.color.Color24.prototype.dispose.call(this);
this.m_a = null;
}
/**
* Returns a 32-bit RGBA representation of this color, as a string.
*
* @return {string}
*/
rune.color.Color32.prototype.toString = function() {
var r = this.m_r['value'];
var g = this.m_g['value'];
var b = this.m_b['value'];
var a = this.m_a['factor'];
return "rgba(" + r + "," + g + "," + b + "," + a +")";
}
//------------------------------------------------------------------------------
// Public prototype methods (API)
//------------------------------------------------------------------------------
/**
* Sets the color instance to the specified RGBA value.
*
* @param {number} r The red component (in 8 bits), ie, a value between 0 and 255.
* @param {number} g The green component (in 8 bits), ie, a value between 0 and 255.
* @param {number} b The blue component (in 8 bits), ie, a value between 0 and 255.
* @param {number} a The alpha component (in 8 bits), ie, a value between 0 and 255.
*
* @return {undefined}
*/
rune.color.Color32.prototype.setRGBA = function(r, g, b, a) {
this.setRGB(r, g, b);
this.m_a['value'] = a;
}</code></pre>
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