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color_ColorComponent.js.html
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<h1 class="page-title">Source: color/ColorComponent.js</h1>
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<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new 8-bit component.
*
* @constructor
*
* @class
* @classdesc
*
* Represents an 8-bit color component. Can be used for red, green, blue or
* alpha.
*/
rune.color.ColorComponent = function(value) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* Current value.
*
* @type {number}
* @private
*/
this.m_value = rune.util.Math.clamp(value | 0x0, 0x0, 0xff);
};
//------------------------------------------------------------------------------
// Public prototype getter and setter methods
//------------------------------------------------------------------------------
/**
* The current value of the component. A component is represented by eight bits
* and can thus be a value between 0 and 255. Invalid values will be squeezed
* within the allowable range.
*
* @member {number} value
* @memberof rune.color.ColorComponent
* @instance
*/
Object.defineProperty(rune.color.ColorComponent.prototype, "value", {
/**
* @this rune.color.ColorComponent
* @ignore
*/
get : function() {
return this.m_value;
},
/**
* @this rune.color.ColorComponent
* @ignore
*/
set : function(value) {
this.m_value = rune.util.Math.clamp(value, 0x0, 0xff);
}
});
/**
* The value of the component represented in a number from 0 to 1. The number
* 0.5 therefore corresponds to 127.5 in numerical form, or 7F in hexadecimal.
*
* @member {number} factor
* @memberof rune.color.ColorComponent
* @instance
*/
Object.defineProperty(rune.color.ColorComponent.prototype, "fraction", {
/**
* @this rune.color.ColorComponent
* @ignore
*/
get : function() {
return this.m_value / 0xff;
},
/**
* @this rune.color.ColorComponent
* @ignore
*/
set : function(value) {
this.m_value = rune.util.Math.clamp(value, 0.0, 1.0) * 0xff;
}
});
//------------------------------------------------------------------------------
// Public prototype methods (API)
//------------------------------------------------------------------------------
/**
* Returns a string representation of the current component value in
* hexadecimal.
*
* @return {string}
*/
rune.color.ColorComponent.prototype.toString = function() {
var hex = parseInt(this.m_value, 10).toString(16);
while(hex.length < 2) hex = "0" + hex;
return hex.toUpperCase();
};</code></pre>
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