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https://github.com/photonstorm/phaser
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15 lines
564 B
JavaScript
15 lines
564 B
JavaScript
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var LinearBurn = require('./LinearBurn');
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var LinearDodge = require('./LinearDodge');
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/**
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* This blend mode combines Linear Dodge and Linear Burn (rescaled so that neutral colors become middle gray).
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* Dodge applies to values of top layer lighter than middle gray, and burn to darker values.
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* The calculation simplifies to the sum of bottom layer and twice the top layer, subtract 128. The contrast decreases.
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*/
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var LinearLight = function (a, b)
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{
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return (b < 128) ? LinearBurn(a, 2 * b) : LinearDodge(a, (2 * (b - 128)));
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};
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module.exports = LinearLight;
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