a
    i=ic(                     @   s   d dl Z d dlZd dlZddlmZmZ G dd dZdd Zdd	 Zd
d Z	G dd dej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 )    N   )Image	ImageFilec                   @   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 )	BoxReaderz}
    A small helper class to read fields stored in JPEG2000 header boxes
    and to easily step into and read sub-boxes.
    c                 C   s    || _ |dk| _|| _d| _d S )Nr   r   )fp
has_lengthlengthremaining_in_box)selfr   r	    r   f/home/droni/.local/share/virtualenvs/DPS-5Je3_V2c/lib/python3.9/site-packages/PIL/Jpeg2KImagePlugin.py__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   tellr	   r
   )r   	num_bytesr   r   r   	_can_read#   s
    

zBoxReader._can_readc                 C   s`   |  |std| j|}t||k rDtd| dt| d| jdkr\|  j|8  _|S )NzNot enough data in headerzExpected to read z bytes but only got .r   )r   SyntaxErrorr   readlenOSErrorr
   )r   r   datar   r   r   _read_bytes-   s    

zBoxReader._read_bytesc                 C   s    t |}| |}t ||S N)structcalcsizer   unpack)r   Zfield_formatsizer   r   r   r   read_fields;   s    

zBoxReader.read_fieldsc                 C   s    | j }| |}tt||S r   )r
   r   r   ioBytesIO)r   r   r   r   r   r   
read_boxes@   s    
zBoxReader.read_boxesc                 C   s$   | j r| j | j | jk S dS d S )NT)r   r   r   r
   r	   r   r   r   r   has_next_boxE   s    zBoxReader.has_next_boxc                 C   s|   | j dkr| j| j tj d| _ | d\}}|dkrL| dd }d}nd}||k sf| || sntd|| | _ |S )	Nr   r   z>I4sr   z>Q      zInvalid header length)r
   r   seekosSEEK_CURr   r   r   )r   ZlboxtboxZhlenr   r   r   next_box_typeK   s    

zBoxReader.next_box_typeN)r   )__name__
__module____qualname____doc__r   r   r   r   r!   r#   r*   r   r   r   r   r      s   

r   c                 C   s  |  d}td|d }||  |d  }td|\}}}}}}}	}	}	}	}
dg|
 }dg|
 }dg|
 }t|
D ],}td|dd|  \||< ||< ||< qt|| || f}|
d	kr|d d
@ dkrd}nd}n0|
dkrd}n"|
dkrd}n|
dkrd}nd}||fS )zParse the JPEG 2000 codestream to extract the size and component
    count from the SIZ marker segment, returning a PIL (size, mode) tuple.   z>Hr   z>HHIIIIIIIIHNz>BBB$      r      r%   I;16LLARGB   RGBA)r   r   r   unpack_fromrange)r   hdrZlsizZsizZrsizZxsizZysizZxosizZyosiz_ZcsizZssizZxrsizZyrsizir   moder   r   r   _parse_codestream`   s0    



*
r?   c                 C   s$   |dkr d|  d|  d|  S dS )zConvert 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      
   i'  Nr   )numdenomexpr   r   r   _res_to_dpi   s    rE   c                 C   s  t | }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r|d	\}
}}}||
f}|d
kr|d@ dkrd}n6|d
krd}n(|dkrd}n|dkrd}n|dkrd}qh|dkrh| }| rh| }|dk r|d\}}}}}}t|||}t|||}|durh|durh||f}	qh qqh|du s~|du rtd||||	fS )zParse 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   r2   r%   r3   r4   r/   r5   r1   r6   r7   r8   s   res s   rescz>HHHHBBzMalformed JP2 header)r   r#   r*   r!   r   rE   r   )r   readerheadermimetyper)   r   r>   ZbpcncdpiheightwidthresZtresZvrcnZvrcdZhrcnZhrcdZvrceZhrceZhresZvresr   r   r   _parse_jp2_header   sZ    

rN   c                       sF   e Zd ZdZdZdd Ze fddZejdd Zdd	 Z	  Z
S )
Jpeg2KImageFileZJPEG2000zJPEG 2000 (ISO 15444)c                 C   s`  | j d}|dkr.d| _t| j \| _| _nV|| j d }|dkr|d| _t| j }|\| _| _| _}|d ur|| jd< nt	d| j
d u s| jd u rt	d	d
| _d
| _d}d}z| j  }t|j}W nf ty4   d}z4| j  }| j d
tj | j  }| j | W n ty.   d}Y n0 Y n0 dd| j
 d
| j| j| j||ffg| _d S )Nr7      OQj2kr%         jP  

jp2rJ   znot a JPEG 2000 filezunable to determine size/moder   r   jpeg2kr   r   )r   r   codecr?   _sizer>   rN   Zcustom_mimetypeinfor   r   _reducelayersfilenor'   fstatst_size	Exceptionr   r&   r   SEEK_ENDtile)r   sigrG   rJ   fdr	   posr   r   r   _open   sH    



zJpeg2KImageFile._openc                    s   | j pt jS r   )rY   superreducer"   	__class__r   r   rf      s    zJpeg2KImageFile.reducec                 C   s
   || _ d S r   )rY   )r   valuer   r   r   rf     s    c                 C   s   | j r| jrd| j> }|d? }t| jd | | t| jd | | f| _| j d }|d d | j| j|d d |d d f}|d d| j |d |fg| _ tj| S )Nr   r   r1   r7   rU   r/   )r`   rY   intr   rW   rZ   r   load)r   poweradjusttt3r   r   r   rk     s    

*zJpeg2KImageFile.load)r+   r,   r-   formatformat_descriptionrd   propertyrf   setterrk   __classcell__r   r   rg   r   rO      s   0
rO   c                 C   s    | d d dkp| d d dkS )Nr7   rP      rR   r   )prefixr   r   r   _accept  s    rw   c                 C   s^  | j }|ds|ddr"d}nd}|dd }|dd }|dd }|d	d
}|dd }	|	d urt|	ttfrtdd |	D std|dd}
|dd }|dd }|dd}|dd}|dd}|dd}d}t|drz|	 }W n t
y   d}Y n0 |||||	|
|||||||f| _t| |dd| j d|fg d S )N.j2kZno_jp2FrQ   rS   offsettile_offset	tile_sizequality_modeZratesquality_layersc                 S   s   g | ]}t |ttfqS r   )
isinstancerj   float).0Zquality_layerr   r   r   
<listcomp>5  s   z_save.<locals>.<listcomp>z,quality_layers must be a sequence of numbersnum_resolutionsr   Zcodeblock_sizeprecinct_sizeirreversibleprogressionZLRCPcinema_modenomctr   r[   rT   rU   )Zencoderinfoendswithgetr~   listtupleall
ValueErrorhasattrr[   r^   Zencoderconfigr   _saver   )Zimr   filenamerX   kindry   rz   r{   r|   r}   r   Z	cblk_sizer   r   r   r   r   rb   r   r   r   r   $  s^    	
r   )z.jp2rx   z.jpcz.jpfz.jpxz.j2cz	image/jp2)r   r'   r    r   r   r   r?   rE   rN   rO   rw   r   Zregister_openrp   Zregister_saveZregister_extensionsZregister_mimer   r   r   r   <module>   s    I"?P?
