o
    svXj?-  ã                   @   s¶   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g d¢¡ e ejd¡ dS )é    Né   )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   úR/var/www/html/myproject/venv/lib/python3.10/site-packages/PIL/Jpeg2KImagePlugin.pyÚ__init__   s   

zBoxReader.__init__c                 C   s6   | j r| j ¡ | | jkrdS | jdkr|| jk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 r&d|› dt|ƒ› d�}t|ƒ‚| jdkr2|  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   Ú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_boxes@   s   
zBoxReader.read_boxesc                 C   s    | j r| j ¡ | j | jk S dS )NT)r	   r   r   r   r
   ©r   r   r   r   Úhas_next_boxE   s   zBoxReader.has_next_boxc                 C   s€   | j dkr| j | j tj¡ d| _ |  d¡\}}|dkr&|  d¡d }d}nd}||k s3|  || ¡s9d}t|ƒ‚|| | _ |S )	Nr   r   z>I4sr   z>Qé   é   zInvalid header length)r   r   ÚseekÚosÚSEEK_CURr!   r   r   )r   ÚlboxÚtboxÚhlenr   r   r   r   Únext_box_typeK   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|  ¡\||< ||< ||< q7|| || f}|
dkrn|d d	@ d
krhd}||fS d}||fS |
dkrxd}||fS |
dkr‚d}||fS |
dkrŒd}||fS 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$   é   r   r   é   r(   úI;16ÚLÚLAÚRGBé   ÚRGBA)r   r   Úi16ber   Úunpack_fromÚrange)r   ÚhdrÚlsizÚsizÚrsizÚxsizÚysizÚxosizÚyosizÚ_ÚcsizÚssizÚxrsizÚyrsizÚir    Úmoder   r   r   Ú_parse_codestreama   s:   

ÿ


*ö
÷ùûþrP   c                 C   s$   |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_dpiƒ   s   ÿrV   c                 C   s˜  t | ƒ}d}d}| ¡ r,| ¡ }|dkr| ¡ }n|dkr(| d¡d dkr(d}| ¡ sd}d}d}d}d}	| ¡ r¸| ¡ }|dkrx| d	¡\}
}}}||
f}|d
kr\|d@ dkr\d}nX|d
krcd}nQ|dkrjd}nJ|dkrqd}nC|dkrwd}n<|dkr´| ¡ }| ¡ r´| ¡ }|dkr°| d¡\}}}}}}t|||ƒ}t|||ƒ}|dur¯|dur¯||f}	n| ¡ s„| ¡ s:|du sÀ|du rÆd}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   r7   r(   r8   r9   r4   r:   r6   r;   r<   r=   s   res s   rescz>HHHHBBzMalformed JP2 header)r   r&   r/   r$   r!   rV   r   )r   ÚreaderÚheaderÚmimetyper-   r    rO   ÚbpcÚncÚdpiÚheightÚwidthÚresÚtresÚvrcnÚvrcdÚhrcnÚhrcdÚvrceÚhrceÚhresÚvresr   r   r   r   Ú_parse_jp2_header‹   sd   ø
€øîri   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Jpeg2KImageFileÚJPEG2000zJPEG 2000 (ISO 15444)c                 C   s~  | j  d¡}|dkrd| _t| j ƒ\| _| _n:|| j  d¡ }|dkrKd| _t| j ƒ}|\| _| _| _}|d ur=|| jd< | j  d¡ 	d	¡rJ|  
¡  nd
}t|ƒ‚| jd u s[| jd u rad}t|ƒ‚d| _d| _d}d}z| j  ¡ }t |¡j}W n1 ty©   d}z| j  ¡ }| j  dtj¡ | j  ¡ }| j  |¡ W n ty¦   d}Y nw Y nw dd| j d| j| j| j||ffg| _d S )Nr<   ó   ÿOÿQÚj2kr(   ó      jP  
‡
Újp2r\   é   s   jp2cÿOÿQznot a JPEG 2000 filezunable to determine size/moder   r   Újpeg2k©r   r   )r   r   ÚcodecrP   Ú_sizerO   ri   Úcustom_mimetypeÚinfoÚendswithÚ_parse_commentr   r    Ú_reduceÚlayersÚfilenor*   ÚfstatÚst_sizeÚ	Exceptionr   r)   r"   ÚSEEK_ENDÚtile)r   ÚsigrX   r\   r   Úfdr
   Úposr   r   r   Ú_openÏ   sX   

€


ÿ€ùü
ÿzJpeg2KImageFile._openc                 C   sª   | j  d¡}t |¡}| j  |d tj¡ 	 | j  d¡}|s d S |d }|dv r*d S | j  d¡}t |¡}|dkrJ| j  |d ¡dd … | jd< d S | j  |d tj¡ q)Nr4   Tr   )é�   éÙ   éd   Úcomment)r   r   r   r>   r)   r*   r+   rv   )r   rA   r
   ÚmarkerÚtypr   r   r   rx     s"   

ñzJpeg2KImageFile._parse_commentc                    s   | j ptƒ jS r   )ry   ÚsuperÚreducer%   ©Ú	__class__r   r   rŒ     s   zJpeg2KImageFile.reducec                 C   s
   || _ d S r   )ry   )r   Úvaluer   r   r   rŒ      s   
c                 C   sª   | j rO| jrOd| 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   r6   r<   rr   r4   )r€   ry   Úintr    rt   rz   r   Úload)r   ÚpowerÚadjustÚtÚt3r   r   r   r‘   $  s   
þ
*zJpeg2KImageFile.load)r0   r1   r2   ÚformatÚformat_descriptionr„   rx   ÚpropertyrŒ   Úsetterr‘   Ú__classcell__r   r   r�   r   rj   Ë   s    4
rj   c                 C   s    | d d… dkp| d d… dkS )Nr<   rl   rp   rn   r   )Úprefixr   r   r   Ú_accept5  s   þrœ   c                 C   s˜  | j }| d¡s| dd¡rd}nd}| dd ¡}| dd ¡}| dd ¡}| d	d
¡}| dd ¡}	|	d urKt|	ttfƒrEtdd„ |	D ƒƒsKd}
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r¨z| ¡ }W n ty§   d}Y nw |||||	|||||||||||f| _t | |dd| j d|fg¡ d S ) Nú.j2kÚno_jp2Frm   ro   ÚoffsetÚtile_offsetÚ	tile_sizeÚquality_modeÚratesÚquality_layersc                 S   s   g | ]	}t |ttfƒ‘qS r   )Ú
isinstancer�   Úfloat)Ú.0Úquality_layerr   r   r   Ú
<listcomp>Q  s    ÿÿz_save.<locals>.<listcomp>z,quality_layers must be a sequence of numbersÚnum_resolutionsr   Úcodeblock_sizeÚprecinct_sizeÚirreversibleÚprogressionÚLRCPÚcinema_modeÚnoÚmctÚsignedrˆ   Úpltr   r{   rq   rr   )Úencoderinforw   Úgetr¥   ÚlistÚtupleÚallÚ
ValueErrorÚstrÚencodeÚhasattrr{   r~   Úencoderconfigr   Ú_saver    )Úimr   Úfilenamerv   ÚkindrŸ   r    r¡   r¢   r¤   r   rª   Ú	cblk_sizer¬   r­   r®   r°   r²   r³   rˆ   r´   r‚   r   r   r   r¿   @  sr   ÿþÿþ	


ÿð"r¿   )z.jp2r�   z.jpcz.jpfz.jpxz.j2cz	image/jp2)r"   r*   r   Ú r   r   r   r   rP   rV   ri   rj   rœ   r¿   Úregister_openr–   Úregister_saveÚregister_extensionsÚregister_mimer   r   r   r   Ú<module>   s"   J"@jH
ÿ