U
    áe5-  ã                	   @  sÊ   d dl mZ d dlZd dlZd dlZddlmZmZmZ G dd„ dƒZ	dd„ Z
d	d
„ Zdd„ ZG dd„ dejƒZdd„ Zdd„ Ze ejee¡ e eje¡ e ejddddddg¡ e ejd¡ dS )é    )ÚannotationsNé   )ÚImageÚ	ImageFileÚ_binaryc                   @  sJ   e Zd ZdZddd„Zdd„ Zdd„ Zd	d
„ Zdd„ Zdd„ Z	dd„ Z
dS )Ú	BoxReaderz}
    A small helper class to read fields stored in JPEG2000 header boxes
    and to easily step into and read sub-boxes.
    éÿÿÿÿc                 C  s    || _ |dk| _|| _d| _d S )Nr   r   )ÚfpÚ
has_lengthÚlengthÚremaining_in_box)Úselfr	   r   © r   úW/var/www/html/StaffProfile/newvenv/lib/python3.8/site-packages/PIL/Jpeg2KImagePlugin.pyÚ__init__   s    
zBoxReader.__init__c                 C  s:   | j r| j ¡ | | jkrdS | jdkr2|| jkS dS d S )NFr   T)r
   r	   Útellr   r   )r   Ú	num_bytesr   r   r   Ú	_can_read%   s
    

zBoxReader._can_readc                 C  sh   |   |¡sd}t|ƒ‚| j |¡}t|ƒ|k rLd|› dt|ƒ› d}t|ƒ‚| jdkrd|  j|8  _|S )NzNot enough data in headerzExpected to read z bytes but only got Ú.r   )r   ÚSyntaxErrorr	   ÚreadÚlenÚOSErrorr   )r   r   ÚmsgÚdatar   r   r   Ú_read_bytes/   s    

zBoxReader._read_bytesc                 C  s    t  |¡}|  |¡}t  ||¡S ©N)ÚstructÚcalcsizer   Úunpack)r   Zfield_formatÚsizer   r   r   r   Úread_fields=   s    

zBoxReader.read_fieldsc                 C  s    | j }|  |¡}tt |¡|ƒS r   )r   r   r   ÚioÚBytesIO)r   r    r   r   r   r   Ú
read_boxesB   s    
zBoxReader.read_boxesc                 C  s$   | j r| j ¡ | j | jk S dS d S )NT)r
   r	   r   r   r   ©r   r   r   r   Úhas_next_boxG   s    zBoxReader.has_next_boxc                 C  s€   | j dkr| j | j tj¡ d| _ |  d¡\}}|dkrL|  d¡d }d}nd}||k sf|  || ¡srd}t|ƒ‚|| | _ |S )	Nr   r   z>I4sr   z>Qé   é   zInvalid header length)r   r	   ÚseekÚosÚSEEK_CURr!   r   r   )r   ZlboxÚtboxZhlenr   r   r   r   Únext_box_typeM   s    

zBoxReader.next_box_typeN)r   )Ú__name__Ú
__module__Ú__qualname__Ú__doc__r   r   r   r!   r$   r&   r-   r   r   r   r   r      s   

r   c                 C  s  |   d¡}t |¡}||   |d ¡ }t d|¡\}}}}}}}	}	}	}	}
dg|
 }dg|
 }dg|
 }t|
ƒD ],}t d|dd|  ¡\||< ||< ||< qn|| || f}|
dkrÐ|d d	@ d
krÊd}qþd}n.|
dkrÞd}n |
dkrìd}n|
dkrúd}nd}||fS )z‹Parse the JPEG 2000 codestream to extract the size and component
    count from the SIZ marker segment, returning a PIL (size, mode) tuple.é   z>HHIIIIIIIIHNz>BBBé$   é   r   r   é   r(   úI;16ÚLÚLAÚRGBé   ÚRGBA)r   r   Úi16ber   Úunpack_fromÚrange)r	   ÚhdrZlsizZsizZrsizZxsizZysizZxosizZyosizÚ_ZcsizZssizZxrsizZyrsizÚir    Úmoder   r   r   Ú_parse_codestreamc   s2    

 ÿ


*rC   c                 C  s$   |dkr d|  d|  d|  S dS )zµConvert JPEG2000's (numerator, denominator, exponent-base-10) resolution,
    calculated as (num / denom) * 10^exp and stored in dots per meter,
    to floating-point dots per inch.r   éþ   é
   i'  Nr   )ÚnumÚdenomÚexpr   r   r   Ú_res_to_dpi…   s    rI   c                 C  s–  t | ƒ}d}d}| ¡ rT| ¡ }|dkr4| ¡ }qTq|dkr| d¡d dkrd}qd}d}d}d}d}	| ¡ rj| ¡ }|dkrî| d	¡\}
}}}||
f}|d
kr¶|d@ dkr¶d}n6|d
krÄd}n(|dkrÒd}n|dkràd}n|dkrìd}qh|dkrh| ¡ }| ¡ rh| ¡ }|dk rþ| d¡\}}}}}}t|||ƒ}t|||ƒ}|dk	rh|dk	rh||f}	qh qþqh|dks~|dkrŠd}t|ƒ‚||||	fS )zªParse the JP2 header box to extract size, component count,
    color space information, and optionally DPI information,
    returning a (size, mode, mimetype, dpi) tuple.Ns   jp2hs   ftypz>4sr   s   jpx z	image/jpxs   ihdrz>IIHBr   r5   r(   r6   r7   r2   r8   r4   r9   r:   r;   s   res s   rescz>HHHHBBzMalformed JP2 header)r   r&   r-   r$   r!   rI   r   )r	   ÚreaderÚheaderÚmimetyper,   r    rB   ZbpcÚncÚdpiÚheightÚwidthÚresZtresZvrcnZvrcdZhrcnZhrcdZvrceZhrceZhresZvresr   r   r   r   Ú_parse_jp2_header   s\    

rR   c                      sN   e Zd ZdZdZdd„ Zdd„ Ze‡ fdd„ƒZej	d	d„ ƒZd
d„ Z
‡  ZS )ÚJpeg2KImageFileZJPEG2000zJPEG 2000 (ISO 15444)c                 C  s†  | j  d¡}|dkr.d| _t| j ƒ\| _| _nt|| j  d¡ }|dkr–d| _t| j ƒ}|\| _| _| _}|d k	rz|| jd< | j  d¡ 	d	¡r¢|  
¡  nd
}t|ƒ‚| jd ks¶| jd krÂd}t|ƒ‚d| _d| _d}d}z| j  ¡ }t |¡j}W nj tk
rZ   d}z4| j  ¡ }| j  dtj¡ | j  ¡ }| j  |¡ W n tk
rT   d}Y nX Y nX dd| j d| j| j| j||ffg| _d S )Nr:   ó   ÿOÿQÚj2kr(   ó      jP  
‡
Újp2rN   é   s   jp2cÿOÿQznot a JPEG 2000 filezunable to determine size/moder   r   Újpeg2k©r   r   )r	   r   ÚcodecrC   Ú_sizeÚ_moderR   Zcustom_mimetypeÚinfoÚendswithÚ_parse_commentr   r    rB   Ú_reduceÚlayersÚfilenor*   ÚfstatÚst_sizeÚ	Exceptionr   r)   r"   ÚSEEK_ENDÚtile)r   ÚsigrK   rN   r   Úfdr   Úposr   r   r   Ú_openÑ   sP    





üÿzJpeg2KImageFile._openc                 C  s¨   | j  d¡}t |¡}| j  |d tj¡ | j  d¡}|s<q¤|d }|dkrNq¤| j  d¡}t |¡}|dkrŽ| j  |d ¡dd … | jd< q¤q*| j  |d tj¡ q*d S )Nr2   r   )é   éÙ   éd   Úcomment)r	   r   r   r<   r)   r*   r+   r^   )r   r?   r   ÚmarkerÚtypr   r   r   r`     s    

zJpeg2KImageFile._parse_commentc                   s   | j ptƒ jS r   )ra   ÚsuperÚreducer%   ©Ú	__class__r   r   rt     s    zJpeg2KImageFile.reducec                 C  s
   || _ d S r   )ra   )r   Úvaluer   r   r   rt   "  s    c                 C  sª   | j rž| jržd| j> }|d? }t| jd | | ƒt| jd | | ƒf| _| j d }|d d | j| j|d d |d d f}|d d| j |d |fg| _ tj | ¡S )Nr   r   r4   r:   rZ   r2   )rh   ra   Úintr    r\   rb   r   Úload)r   ÚpowerÚadjustÚtÚt3r   r   r   ry   &  s    
þ
*zJpeg2KImageFile.load)r.   r/   r0   ÚformatÚformat_descriptionrl   r`   Úpropertyrt   Úsetterry   Ú__classcell__r   r   ru   r   rS   Í   s   4
rS   c                 C  s    | d d… dkp| d d… dkS )Nr:   rT   rX   rV   r   )Úprefixr   r   r   Ú_accept7  s    þr„   c                 C  s   | j }| d¡s| dd¡r"d}nd}| dd ¡}| dd ¡}| dd ¡}| d	d
¡}| dd ¡}	|	d k	r–t|	ttfƒrŠtdd„ |	D ƒƒs–d}
t|
ƒ‚| dd¡}| dd ¡}| dd ¡}| dd¡}| dd¡}| dd¡}| dd¡}| dd¡}| d¡}t|tƒr| 	¡ }| dd¡}d}t
|dƒrXz| ¡ }W n tk
rV   d}Y nX |||||	|||||||||||f| _t | |dd| j d|fg¡ d S ) Nú.j2kZno_jp2FrU   rW   ÚoffsetÚtile_offsetÚ	tile_sizeÚquality_modeZratesÚquality_layersc                 s  s   | ]}t |ttfƒV  qd S r   )Ú
isinstancerx   Úfloat)Ú.0Zquality_layerr   r   r   Ú	<genexpr>R  s    z_save.<locals>.<genexpr>z,quality_layers must be a sequence of numbersÚnum_resolutionsr   Zcodeblock_sizeÚprecinct_sizeÚirreversibleÚprogressionZLRCPÚcinema_modeÚnoÚmctÚsignedrp   Úpltr   rc   rY   rZ   )Zencoderinfor_   Úgetr‹   ÚlistÚtupleÚallÚ
ValueErrorÚstrÚencodeÚhasattrrc   rf   Zencoderconfigr   Ú_saver    )Zimr	   Úfilenamer^   Úkindr†   r‡   rˆ   r‰   rŠ   r   r   Z	cblk_sizer   r‘   r’   r“   r•   r–   rp   r—   rj   r   r   r   r    B  sl    ÿÿþ

ðr    z.jp2r…   z.jpcz.jpfz.jpxz.j2cz	image/jp2)Ú
__future__r   r"   r*   r   Ú r   r   r   r   rC   rI   rR   rS   r„   r    Zregister_openr~   Zregister_saveZregister_extensionsZregister_mimer   r   r   r   Ú<module>   s$   J"@jE ÿ