ó TR¹Nc@s9dZddlmZdefd„ƒYZd„ZdS(sM Utility functions for handling images. Requires PIL, as you might imagine. iÿÿÿÿ(tFilet ImageFilecBsAeZdZd„ZeeƒZd„ZeeƒZd„ZRS(s€ A mixin for use alongside django.core.files.base.File, which provides additional features for dealing with images. cCs|jƒdS(Ni(t_get_image_dimensions(tself((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyt _get_widthscCs|jƒdS(Ni(R(R((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyt _get_heightscCsNt|dƒsG|j}|jƒt|ƒ|_|rG|jƒqGn|jS(Nt_dimensions_cache(thasattrtclosedtopentget_image_dimensionsRtclose(RR ((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyRs  ( t__name__t __module__t__doc__RtpropertytwidthRtheightR(((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyR s     cCsÕyddlm}Wntk r3ddl}nX|jƒ}t}t|dƒr^|}nt|dƒ}t}zGx<|jdƒ}|s’Pn|j |ƒ|j ry|j j SqydSWd|rÐ|j ƒnXdS(sFReturns the (width, height) of an image, given an open file or a path.iÿÿÿÿ(RNtreadtrbi(tPILRt ImportErrortParsertFalseRR tTrueRtfeedtimagetsizetNoneR (t file_or_patht PILImageFiletpR tfiletdata((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyR s*      N(Rtdjango.core.filesRRR (((sE/home/panlixing/Python_Projects/gaeseries/django/core/files/images.pyts