15 lines
498 B
JavaScript
15 lines
498 B
JavaScript
Filter.prototype.filter_saturation = function(pixels = this.pixels(),p = null)
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{
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var d = pixels.data;
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for (var i=0; i<d.length; i+=4) {
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var r = d[i];
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var g = d[i+1];
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var b = d[i+2];
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// CIE luminance for the RGB
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// The human eye is bad at seeing red and blue, so we de-emphasize them.
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var v = 0.2126*r + 0.7152*g + 0.0722*b;
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d[i] = d[i+1] = d[i+2] = v
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}
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ronin.canvas.clear();
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ronin.canvas.context().putImageData(pixels, 0, 0, 0, 0, pixels.width, pixels.height);
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} |