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import { vertex } from '@tools/fragments';
import fragment from './extract-brightness.frag';
import { Filter } from '@pixi/core';

/**
 * Internal filter for AdvancedBloomFilter to get brightness.
 * @class
 * @private
 */
class ExtractBrightnessFilter extends Filter
{
    /**
     * @param {number} [threshold] - Defines how bright a color needs to be extracted.
     */
    constructor(threshold = 0.5)
    {
        super(vertex, fragment);

        this.threshold = threshold;
    }

    /**
     * Defines how bright a color needs to be extracted.
     *
     * @default 0.5
     */
    get threshold(): number
    {
        return this.uniforms.threshold;
    }
    set threshold(value: number)
    {
        this.uniforms.threshold = value;
    }
}

export { ExtractBrightnessFilter };