/
BlendEquation.js
54 lines (49 loc) · 1.52 KB
/
BlendEquation.js
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import freezeObject from '../Core/freezeObject.js';
import WebGLConstants from '../Core/WebGLConstants.js';
/**
* Determines how two pixels' values are combined.
*
* @exports BlendEquation
*/
var BlendEquation = {
/**
* Pixel values are added componentwise. This is used in additive blending for translucency.
*
* @type {Number}
* @constant
*/
ADD : WebGLConstants.FUNC_ADD,
/**
* Pixel values are subtracted componentwise (source - destination). This is used in alpha blending for translucency.
*
* @type {Number}
* @constant
*/
SUBTRACT : WebGLConstants.FUNC_SUBTRACT,
/**
* Pixel values are subtracted componentwise (destination - source).
*
* @type {Number}
* @constant
*/
REVERSE_SUBTRACT : WebGLConstants.FUNC_REVERSE_SUBTRACT,
/**
* Pixel values are given to the minimum function (min(source, destination)).
*
* This equation operates on each pixel color component.
*
* @type {Number}
* @constant
*/
MIN : WebGLConstants.MIN,
/**
* Pixel values are given to the maximum function (max(source, destination)).
*
* This equation operates on each pixel color component.
*
* @type {Number}
* @constant
*/
MAX : WebGLConstants.MAX
};
export default freezeObject(BlendEquation);