U
    
3g2  ã                   @  s’   d dl mZ d dlZddlmZmZ ddlmZ dddœd	d
„Z	G dd„ dejƒZ
G dd„ dejƒZe e
je
e	¡ e de¡ e e
jd¡ dS )é    )ÚannotationsNé   )ÚImageÚ	ImageFile)Úi32beÚbytesÚbool)ÚprefixÚreturnc                 C  s   | d d… dkS )Né   s   qoif© )r	   r   r   ú6/tmp/pip-unpacked-wheel-tbvhwjp8/PIL/QoiImagePlugin.pyÚ_accept   s    r   c                   @  s"   e Zd ZdZdZddœdd„ZdS )ÚQoiImageFileZQOIzQuite OK ImageÚNone)r
   c                   sŠ   t ˆ j d¡ƒsd}t|ƒ‚t‡ fdd„tdƒD ƒƒˆ _ˆ j d¡d }|dkrTd	nd
ˆ _ˆ j dt	j
¡ ddˆ j ˆ j ¡ d fgˆ _d S )Nr   znot a QOI filec                 3  s   | ]}t ˆ j d ¡ƒV  qdS )r   N)Úi32ÚfpÚread)Ú.0Úi©Úselfr   r   Ú	<genexpr>   s     z%QoiImageFile._open.<locals>.<genexpr>é   r   r   é   ZRGBZRGBAÚqoi)r   r   )r   r   r   ÚSyntaxErrorÚtupleÚrangeÚ_sizeÚ_modeÚseekÚosÚSEEK_CURÚtellZtile)r   ÚmsgZchannelsr   r   r   Ú_open   s    zQoiImageFile._openN)Ú__name__Ú
__module__Ú__qualname__ÚformatÚformat_descriptionr&   r   r   r   r   r      s   r   c                   @  sJ   e Zd ZU dZdZded< i Zded< ddd	œd
d„Zdddœdd„ZdS )Ú
QoiDecoderTNzbytes | bytearray | NoneÚ_previous_pixelzdict[int, bytes | bytearray]Ú_previously_seen_pixelszbytes | bytearrayr   )Úvaluer
   c                 C  sD   || _ |\}}}}|d |d  |d  |d  d }|| j|< d S )Nr   é   é   é   é@   )r-   r.   )r   r/   ÚrÚgÚbÚaZ
hash_valuer   r   r   Ú_add_to_previous_pixels+   s    $z"QoiDecoder._add_to_previous_pixelsr   ztuple[int, int])Úbufferr
   c                   sT  ˆj d k	st‚i ˆ_ˆ tdƒ¡ tƒ }t ˆj¡}ˆjj	ˆjj
 | }t|ƒ|k rFˆj  d¡d }|dkr–ˆjr–tˆj  d¡ƒˆjdd …  }n†|dkr®ˆj  d¡}nn|d? }|dkrÜ|d	@ }ˆj |td
ƒ¡}n@|dkrPˆjrPtˆjd |d@ d?  d d ˆjd |d@ d?  d d ˆjd |d@  d d ˆjd fƒ}nÌ|dkrÔˆjrÔˆj  d¡d }	|d	@ d ‰ |	d@ d? d }
|	d@ d }tt‡ ‡fdd„t|
d|fƒD ƒƒƒ}|ˆjdd … 7 }nH|dkrˆjr|d	@ d }ˆj}|dkr|d d… }||| 7 }qHˆ |¡ |dkr<|d d… }||7 }qHˆ |¡ dS )N)r   r   r   éÿ   r   r   éþ   r   r:   r   é   é?   )r   r   r   r   é0   r   é   é   é    éð   é   é   c                 3  s(   | ] \}}ˆj | ˆ  | d  V  qdS )r?   N)r-   )r   r   Zdiff©Z
diff_greenr   r   r   r   [   s   ÿz$QoiDecoder.decode.<locals>.<genexpr>)éÿÿÿÿr   )ÚfdÚAssertionErrorr.   r8   Ú	bytearrayr   ZgetmodebandsÚmodeÚstateZxsizeZysizeÚlenr   r-   Úgetr   Ú	enumerateZ
set_as_raw)r   r9   ÚdataZbandsZdest_lengthÚbyter/   ÚopZop_indexZsecond_byteZdiff_redZ	diff_blueZ
run_lengthr   rE   r   Údecode2   sn    " ÿÿÿúÿ
þÿ




zQoiDecoder.decode)	r'   r(   r)   Z	_pulls_fdr-   Ú__annotations__r.   r8   rR   r   r   r   r   r,   &   s
   
r,   r   z.qoi)Ú
__future__r   r"   Ú r   r   Ú_binaryr   r   r   r   Z	PyDecoderr,   Zregister_openr*   Zregister_decoderZregister_extensionr   r   r   r   Ú<module>   s   K