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  ã               @   s>   d Z ddlZddlZddlmZ G dd„ deƒZd	dd„ZdS )
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Utility functions for handling images.

Requires Pillow as you might imagine.
é    N)ÚFilec               @   s0   e Zd ZdZedd„ ƒZedd„ ƒZdd„ ZdS )	Ú	ImageFilez€
    A mixin for use alongside django.core.files.base.File, which provides
    additional features for dealing with images.
    c             C   s   |   ¡ d S )Nr   )Ú_get_image_dimensions)Úself© r   ú</tmp/pip-install-nbqhn9mb/Django/django/core/files/images.pyÚwidth   s    zImageFile.widthc             C   s   |   ¡ d S )Né   )r   )r   r   r   r   Úheight   s    zImageFile.heightc             C   s,   t | dƒs&| j}|  ¡  t| |d| _| jS )NÚ_dimensions_cache)Úclose)ÚhasattrÚclosedÚopenÚget_image_dimensionsr   )r   r   r   r   r   r      s
    
zImageFile._get_image_dimensionsN)Ú__name__Ú
__module__Ú__qualname__Ú__doc__Úpropertyr   r
   r   r   r   r   r   r      s   r   Fc       	   
   C   s  ddl m} | ¡ }t| dƒr6| }| ¡ }| d¡ nt| dƒ}d}z¢d}x˜| |¡}|s\P y| |¡ W n^ t	j
k
r¢ } z|jd  d¡rn‚ W dd}~X Y n( tj
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r¶   Y n tk
rÈ   Y nX |jrØ|jjS |d	9 }qLW d
S |rö| ¡  n
| |¡ X dS )z®
    Return the (width, height) of an image, given an open file or a path.  Set
    'close' to True to close the file at the end if it is initially in an open
    state.
    r   )r   ÚreadÚrbTi   zError -5Né   )NN)ZPILr   ÚParserr   ÚtellÚseekr   r   ÚfeedÚzlibÚerrorÚargsÚ
startswithÚstructÚRuntimeErrorÚimageÚsizer   )	Zfile_or_pathr   ZPillowImageFileÚpÚfileZfile_posÚ
chunk_sizeÚdataÚer   r   r   r   !   s>    



r   )F)r   r!   r   Zdjango.core.filesr   r   r   r   r   r   r   Ú<module>   s
   