src/effects/BrightnessContrastEffect.js
import { Uniform } from "three";
import { BlendFunction } from "./blending/BlendFunction.js";
import { Effect } from "./Effect.js";
import fragment from "./glsl/brightness-contrast/shader.frag";
/**
* A brightness/contrast effect.
*
* Reference: https://github.com/evanw/glfx.js
*/
export class BrightnessContrastEffect extends Effect {
/**
* Constructs a new brightness/contrast effect.
*
* @param {Object} [options] - The options.
* @param {BlendFunction} [options.blendFunction=BlendFunction.NORMAL] - The blend function of this effect.
* @param {Number} [options.brightness=0.0] - The brightness factor, ranging from -1 to 1, where 0 means no change.
* @param {Number} [options.contrast=0.0] - The contrast factor, ranging from -1 to 1, where 0 means no change.
*/
constructor(options = {}) {
const settings = Object.assign({
blendFunction: BlendFunction.NORMAL,
brightness: 0.0,
contrast: 0.0
}, options);
super("BrightnessContrastEffect", fragment, {
blendFunction: settings.blendFunction,
uniforms: new Map([
["brightness", new Uniform(settings.brightness)],
["contrast", new Uniform(settings.contrast)]
])
});
}
}