a
    ù!f?-  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   úV/var/www/html/python-backend/venv/lib/python3.9/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_boxes@   s    
zBoxReader.read_boxesc                 C   s$   | j r| j ¡ | j | jk S dS d S )NT)r	   r   r   r   r
   ©r   r   r   r   Úhas_next_boxE   s    zBoxReader.has_next_boxc                 C   s€   | j dkr| j | j tj¡ d| _ |  d¡\}}|dkrL|  d¡d }d}nd}||k sf|  || ¡srd}t|ƒ‚|| | _ |S )	Nr   r   z>I4sr   z>Qé   é   zInvalid header length)r   r   ÚseekÚosÚSEEK_CURr    r   r   )r   ZlboxÚtboxZhlenr   r   r   r   Únext_box_typeK   s    

zBoxReader.next_box_typeN)r   )Ú__name__Ú
__module__Ú__qualname__Ú__doc__r   r   r   r    r#   r%   r,   r   r   r   r   r      s   

r   c                 C   s  |   d¡}t |¡}||   |d ¡ }t d|¡\}}}}}}}	}	}	}	}
dg|
 }dg|
 }dg|
 }t|
ƒD ],}t d|dd|  ¡\||< ||< ||< qn|| || f}|
dkrÐ|d d	@ d
krÊd}qþd}n.|
dkrÞd}n |
dkrìd}n|
dkrúd}nd}||fS )z‹Parse the JPEG 2000 codestream to extract the size and component
    count from the SIZ marker segment, returning a PIL (size, mode) tuple.é   z>HHIIIIIIIIHNz>BBBé$   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_codestreama   s0    

ÿ


*rB   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    rH   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urh|durh||f}	qh qþqh|du s~|du 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   r4   r'   r5   r6   r1   r7   r3   r8   r9   r:   s   res s   rescz>HHHHBBzMalformed JP2 header)r   r%   r,   r#   r    rH   r   )r   ÚreaderÚheaderÚmimetyper+   r   rA   ZbpcÚncÚdpiÚheightÚwidthÚresZtresZvrcnZvrcdZhrcnZhrcdZvrceZhrceZhresZvresr   r   r   r   Ú_parse_jp2_header‹   s\    

rQ   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 urz|| jd< | j  d¡ 	d	¡r¢|  
¡  nd
}t|ƒ‚| jd u s¶| jd u rÂd}t|ƒ‚d| _d| _d}d}z| j  ¡ }t |¡j}W nf tyV   d}z4| j  ¡ }| j  dtj¡ | j  ¡ }| j  |¡ W n tyP   d}Y n0 Y n0 dd| j d| j| j| j||ffg| _d S )Nr9   ó   ÿOÿQÚj2kr'   ó      jP  
‡
Újp2rM   é   s   jp2cÿOÿQznot a JPEG 2000 filezunable to determine size/moder   r   Újpeg2k©r   r   )r   r   ÚcodecrB   Ú_sizerA   rQ   Zcustom_mimetypeÚinfoÚendswithÚ_parse_commentr   r   Ú_reduceÚlayersÚfilenor)   ÚfstatÚst_sizeÚ	Exceptionr   r(   r!   ÚSEEK_ENDÚtile)r   ÚsigrJ   rM   r   Úfdr
   Úposr   r   r   Ú_openÏ   sP    





üÿzJpeg2KImageFile._openc                 C   s¨   | j  d¡}t |¡}| j  |d tj¡ | j  d¡}|s<q¤|d }|dv rNq¤| j  d¡}t |¡}|dkrŽ| j  |d ¡dd … | jd< q¤q*| j  |d tj¡ q*d S )Nr1   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   )r_   ÚsuperÚreducer$   ©Ú	__class__r   r   rr     s    zJpeg2KImageFile.reducec                 C   s
   || _ d S r   )r_   )r   Úvaluer   r   r   rr      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   r3   r9   rY   r1   )rf   r_   Úintr   r[   r`   r   Úload)r   ÚpowerÚadjustÚtÚt3r   r   r   rw   $  s    
þ
*zJpeg2KImageFile.load)r-   r.   r/   ÚformatÚformat_descriptionrj   r^   Úpropertyrr   Úsetterrw   Ú__classcell__r   r   rs   r   rR   Ë   s   4
rR   c                 C   s    | d d… dkp| d d… dkS )Nr9   rS   rW   rU   r   )Úprefixr   r   r   Ú_accept5  s    þr‚   c                 C   sž  | j }| d¡s| dd¡r"d}nd}| dd ¡}| dd ¡}| dd ¡}| d	d
¡}| dd ¡}	|	d u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rVz| ¡ }W n tyT   d}Y n0 |||||	|||||||||||f| _t | |dd| j d|fg¡ d S ) Nú.j2kZno_jp2FrT   rV   ÚoffsetÚtile_offsetÚ	tile_sizeÚquality_modeZratesÚquality_layersc                 S   s   g | ]}t |ttfƒ‘qS r   )Ú
isinstancerv   Úfloat)Ú.0Zquality_layerr   r   r   Ú
<listcomp>Q  s   ÿz_save.<locals>.<listcomp>z,quality_layers must be a sequence of numbersÚnum_resolutionsr   Zcodeblock_sizeÚprecinct_sizeÚirreversibleÚprogressionZLRCPÚcinema_modeÚnoÚmctÚsignedrn   Úpltr   ra   rX   rY   )Zencoderinfor]   Úgetr‰   ÚlistÚtupleÚallÚ
ValueErrorÚstrÚencodeÚhasattrra   rd   Zencoderconfigr   Ú_saver   )Zimr   Úfilenamer\   Úkindr„   r…   r†   r‡   rˆ   r   r   Z	cblk_sizerŽ   r   r   r‘   r“   r”   rn   r•   rh   r   r   r   rž   @  sp    ÿþÿþ	

ðrž   )z.jp2rƒ   z.jpcz.jpfz.jpxz.j2cz	image/jp2)r!   r)   r   Ú r   r   r   r   rB   rH   rQ   rR   r‚   rž   Zregister_openr|   Zregister_saveZregister_extensionsZregister_mimer   r   r   r   Ú<module>   s    J"@jH
ÿ