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    €Ha	
  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-unpacked-wheel-3jxiddxt/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}| |¡}|sZqäz| 	|¡ W n^ t
jk
r  } z|jd  d¡rŽn‚ W 5 d}~X Y n( tjk
r´   Y n tk
rÆ   Y nX |jrÚ|jjW ¢S |d	9 }qJW ¢d
S |rú| ¡  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   r   ÚfeedÚzlibÚerrorÚargsÚ
startswithÚstructÚRuntimeErrorÚimageÚsize)	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
   