code: function RGBSplitFilter()
  {
      core.AbstractFilter.call(this,
          // vertex shader
          null,
          // fragment shader
          fs.readFileSync(__dirname + '/rgbSplit.frag', 'utf8'),
          // custom uniforms
          {
              red:        { type: 'v2', value: { x: 20, y: 20 } },
              green:      { type: 'v2', value: { x: -20, y: 20 } },
              blue:       { type: 'v2', value: { x: 20, y: -20 } },
              dimensions: { type: '4fv', value: [0, 0, 0, 0] }
          }
      );
  }
docs: An RGB Split Filter.
  
  @class
  @extends AbstractFilter
  @namespace PIXI