Description
bool 
imagesetbrush ( resource image, resource brush )
     imagesetbrush() sets the brush image to be
     used by all line drawing functions (such as imageline()
     and imagepolygon()) when drawing with the special
     colors IMG_COLOR_BRUSHED or IMG_COLOR_STYLEDBRUSHED.
    
Note: 
      You need not take special action when you are finished with a brush, but if you
      destroy the brush image, you must not use the IMG_COLOR_BRUSHED or 
      IMG_COLOR_STYLEDBRUSHED
      colors until you have set a new brush image!
     
Note: This function was added in PHP 4.0.6