U
    1èÝc$  ã                	   @   sÔ   d dl Z d dlZddlmZmZ ddlmZ ddlmZ dd„ Z	ddd	d	d
ddddœZ
G dd„ dejƒZdd„ ZG dd„ dejƒZe de¡ e ejee	¡ e eje¡ e ejd¡ e ejddddg¡ dS )é    Né   )ÚImageÚ	ImageFile)Úi16be)Úo8c                 C   s   t | ƒdkot| ƒdkS )Né   éÚ  )ÚlenÚi16)Úprefix© r   ú1lib/python3.8/site-packages/PIL/SgiImagePlugin.pyÚ_accept!   s    r   ÚLúL;16BÚRGBzRGB;16BÚRGBAzRGBA;16B))r   r   r   )r   r   r   )r   r   r   )r   r   r   )r   é   r   )r   r   r   )r   r   é   )r   r   r   c                   @   s   e Zd ZdZdZdd„ ZdS )ÚSgiImageFileZSGIzSGI Image File Formatc              	   C   sz  d}| j  |¡}t|ƒs$d}t|ƒ‚|d }|d }t|dƒ}t|dƒ}t|dƒ}t|dƒ}	|||	f}
d	}zt|
 }W n tk
rŠ   Y nX |d	kr d
}t|ƒ‚||f| _| d¡d | _	| j	dkrÊd| _
d}|dkrP|| | }|dkrdd| j || j	d|ffg| _n@g | _|}| j	D ].}| j dd| j ||d|ff¡ ||7 }qn&|dkrvdd| j ||||ffg| _d S )Né   zNot an SGI image filer   r   r   é   é   é
   Ú úUnsupported SGI image modeú;r   r   z	image/rgbéÿÿÿÿÚSGI16)r   r   Úrawr   Zsgi_rle)ÚfpÚreadr   Ú
ValueErrorr
   ÚMODESÚKeyErrorZ_sizeÚsplitÚmodeZcustom_mimetypeÚsizeZtileÚappend)ÚselfZheadlenÚsÚmsgZcompressionÚbpcZ	dimensionÚxsizeÚysizeÚzsizeZlayoutÚrawmodeÚorientationÚpagesizeÚoffsetZlayerr   r   r   Ú_open8   sP    








ÿ
ÿ
ÿzSgiImageFile._openN)Ú__name__Ú
__module__Ú__qualname__ÚformatZformat_descriptionr4   r   r   r   r   r   3   s   r   c              	   C   sR  | j dkr*| j dkr*| j dkr*d}t|ƒ‚| j}| dd¡}|dkrPd}t|ƒ‚d	}d
}d}d}	| j\}
}| j dkr‚|dkr‚d}	n| j dkrd}	t| j ƒ}|	dksª|	dkr®d}t|  ¡ ƒ|krÞd|› dt|  ¡ ƒ› }t|ƒ‚d}d}tj 	tj 
|¡¡d }| dd¡}d}| t d|¡¡ | t|ƒ¡ | t|ƒ¡ | t d|	¡¡ | t d|
¡¡ | t d|¡¡ | t d|¡¡ | t d|¡¡ | t d|¡¡ | t dd¡¡ | t d|¡¡ | t dd¡¡ | t d|¡¡ | t dd¡¡ d}|dkrd}|  ¡ D ]}| | d|d|¡¡ qt|dƒrN| ¡  d S )Nr   r   r   r   r,   r   )r   r   z%Unsupported number of bytes per pixelr   r   r   r   r   z(incorrect number of bands in SGI write: z vs éÿ   ÚasciiÚignorez>hz>Hz>lZ4só    Z79sr*   Z404sr   r   Úflush)r&   r"   ZencoderinfoÚgetr'   r	   ZgetbandsÚosÚpathÚsplitextÚbasenameÚencodeÚwriteÚstructZpackr   r%   ÚtobytesÚhasattrr=   )Úimr    Úfilenamer+   Úinfor,   r1   Zmagic_numberZrleZdimÚxÚyÚzZpinminZpinmaxZimg_nameZcolormapr0   Úchannelr   r   r   Ú_save   sb    



rO   c                   @   s   e Zd ZdZdd„ ZdS )ÚSGI16DecoderTc           	      C   sŠ   | j \}}}| jj| jj }t| jƒ}| j d¡ t|ƒD ]J}t	 
d| jj| jjf¡}| | j d| ¡dd||¡ | j |j|¡ q:dS )Nr   r   r   r   r   )r   r   )ÚargsÚstater-   r.   r	   r&   ÚfdÚseekÚranger   ÚnewZ	frombytesr!   rH   Zputband)	r)   Úbufferr0   Zstrider1   r2   r/   ZbandrN   r   r   r   ÚdecodeÎ   s    
    ÿzSGI16Decoder.decodeN)r5   r6   r7   Z	_pulls_fdrX   r   r   r   r   rP   Ë   s   rP   r   z	image/sgiz.bwz.rgbz.rgbaz.sgi)r?   rE   r   r   r   Z_binaryr   r
   r   r   r#   r   rO   Z	PyDecoderrP   Zregister_decoderZregister_openr8   Zregister_saveZregister_mimeZregister_extensionsr   r   r   r   Ú<module>   s,   øLL