nl_tokens: Set the RGBA value of a coordinate
pl_tokens: function ( x , y , rgba ) { var i = this . _getIndex ( x , y ) ; var prev = this . getColor ( x , y ) ; this . _png . <mask> [ i + 0 ] = is_num ( rgba . r ) ? to_rgba_int ( rgba . r ) : prev . r ; this . _png . data [ i + 1 ] = is_num ( rgba . g ) ? to_rgba_int ( rgba . g ) : prev . g ; this . _png . data [ i + 2 ] = is_num ( rgba . b ) ? to_rgba_int ( rgba . b ) : prev . b ; this . _png . data [ i + 3 ] = is_num ( rgba . a ) ? to_rgba_int ( rgba . a ) : prev . a ; return this . getColor ( x , y ) ; }