ó
mÜJ]c           @` sˆ   d  Z  d d l m Z m Z m Z m Z d d l Z e j e ƒ Z	 d d l
 m Z m Z d Z e d „ Z e j d ƒ j e j ƒ d S(	   u6    Provide tools for testing Bokeh maipulating images.

i    (   t   absolute_importt   divisiont   print_functiont   unicode_literalsN(   t   Imaget
   ImageChopsu
   image_diffc         C` sš  t  j | ƒ } t  j | ƒ } | j d ƒ } | j d ƒ } t | j | j ƒ } t | j | j ƒ } t  j d | | f d ƒ } t  j d | | f d ƒ }	 | j | ƒ |	 j | ƒ t j	 | |	 ƒ }
 |
 j d ƒ }
 |
 j
 d „  ƒ }
 |
 j ƒ  d k rÿ d S|
 j d ƒ } | r*| j |	 d |
 ƒn | j d d |
 ƒ| j |  ƒ d } x- |
 j ƒ  D] } | d k r]| d	 7} q]q]Wt | ƒ | | d
 Sd S(   u-    Returns the percentage of differing pixels. u   RGBAu   whiteu   Lc         S` s   |  d k r d Sd S(   Ni    iÿ   (    (   t   k(    (    s9   lib/python2.7/site-packages/bokeh/_testing/util/images.pyt   <lambda>=   t    i    u   RGBt   maskiÿ   i   id   N(   i    i    iÿ   (   R   t   opent   convertt   maxt   widtht   heightt   newt   pasteR   t
   differencet   pointt   getbboxt   Nonet   savet   getdatat   float(   t	   diff_patht   before_patht
   after_patht   superimposet   beforet   afterR   R   t   resized_beforet   resized_afterR	   t   difft   pixelst   v(    (    s9   lib/python2.7/site-packages/bokeh/_testing/util/images.pyt
   image_diff*   s2    u   PIL.PngImagePlugin(   u
   image_diff(   t   __doc__t
   __future__R    R   R   R   t   loggingt	   getLoggert   __name__t   logt   PILR   R   t   __all__t   FalseR#   t   setLevelt   INFO(    (    (    s9   lib/python2.7/site-packages/bokeh/_testing/util/images.pyt   <module>	   s   "		3