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PixelFormat.js
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PixelFormat.js
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/*global define*/
define([
'./freezeObject'
], function(
freezeObject) {
"use strict";
/**
* The format of a pixel, i.e., the number of components it has and what they represent.
*
* @namespace
* @alias PixelFormat
*/
var PixelFormat = {
/**
* 0x1902. A pixel format containing a depth value.
*
* @type {Number}
* @constant
*/
DEPTH_COMPONENT : 0x1902,
/**
* 0x84F9. A pixel format containing a depth and stencil value, most often used with {@link PixelDatatype.UNSIGNED_INT_24_8_WEBGL}.
*
* @type {Number}
* @constant
*/
DEPTH_STENCIL : 0x84F9,
/**
* 0x1906. A pixel format containing an alpha channel.
*
* @type {Number}
* @constant
*/
ALPHA : 0x1906,
/**
* 0x1907. A pixel format containing red, green, and blue channels.
*
* @type {Number}
* @constant
*/
RGB : 0x1907,
/**
* 0x1908. A pixel format containing red, green, blue, and alpha channels.
*
* @type {Number}
* @constant
*/
RGBA : 0x1908,
/**
* 0x1909. A pixel format containing a luminance (intensity) channel.
*
* @type {Number}
* @constant
*/
LUMINANCE : 0x1909,
/**
* 0x190A. A pixel format containing luminance (intensity) and alpha channels.
*
* @type {Number}
* @constant
*/
LUMINANCE_ALPHA : 0x190A,
/**
* @private
*/
validate : function(pixelFormat) {
return pixelFormat === PixelFormat.DEPTH_COMPONENT ||
pixelFormat === PixelFormat.DEPTH_STENCIL ||
pixelFormat === PixelFormat.ALPHA ||
pixelFormat === PixelFormat.RGB ||
pixelFormat === PixelFormat.RGBA ||
pixelFormat === PixelFormat.LUMINANCE ||
pixelFormat === PixelFormat.LUMINANCE_ALPHA;
},
/**
* @private
*/
isColorFormat : function(pixelFormat) {
return pixelFormat === PixelFormat.ALPHA ||
pixelFormat === PixelFormat.RGB ||
pixelFormat === PixelFormat.RGBA ||
pixelFormat === PixelFormat.LUMINANCE ||
pixelFormat === PixelFormat.LUMINANCE_ALPHA;
},
/**
* @private
*/
isDepthFormat : function(pixelFormat) {
return pixelFormat === PixelFormat.DEPTH_COMPONENT ||
pixelFormat === PixelFormat.DEPTH_STENCIL;
}
};
return freezeObject(PixelFormat);
});