applyFilterPass(filter, filterArea, width, height)
 Applies the filter to the specified area. 
Parameters
Name Type Description filter  PIXI.AbstractFilter  the filter that needs to be applied filterArea  PIXI.Texture  TODO - might need an update width  Number  the horizontal range of the filter height  Number  the vertical range of the filter 
Source code: pixi/renderers/webgl/utils/WebGLFilterManager.js (Line 336)