Source: gfx/filters/ascii/AsciiFilter.js

const AbstractFilter = require('../../core/renderers/webgl/filters/AbstractFilter');

// TODO (cengler) - The Y is flipped in this shader for some reason.

/**
 * @author Vico @vicocotea
 * original shader : https://www.shadertoy.com/view/lssGDj by @movAX13h
 */

/**
 * An ASCII filter.
 *
 * @class
 * @extends AbstractFilter
 */
function AsciiFilter() {
  AbstractFilter.call(this,
        // vertex shader
        null,
        // fragment shader
        require('./ascii.frag'),
        // custom uniforms
    {
      dimensions: { type: '4fv', value: new Float32Array([0, 0, 0, 0]) },
      pixelSize: { type: '1f', value: 8 },
    }
    );
}

AsciiFilter.prototype = Object.create(AbstractFilter.prototype);
AsciiFilter.prototype.constructor = AsciiFilter;
module.exports = AsciiFilter;

Object.defineProperties(AsciiFilter.prototype, {
    /**
     * The pixel size used by the filter.
     *
     * @member {number}
     * @memberof filters.AsciiFilter#
     */
  size: {
    get: function() {
      return this.uniforms.pixelSize.value;
    },
    set: function(value) {
      this.uniforms.pixelSize.value = value;
    },
  },
});