o
    e5-                     @  s   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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 )    )annotationsN   )Image	ImageFile_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 )	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   H/var/www/html/venv/lib/python3.10/site-packages/PIL/Jpeg2KImagePlugin.py__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	   tellr   r   )r   	num_bytesr   r   r   	_can_read%   s
   

zBoxReader._can_readc                 C  sh   |  |sd}t|| j|}t||k r&d| dt| d}t|| jdkr2|  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   msgdatar   r   r   _read_bytes/   s   

zBoxReader._read_bytesc                 C  s    t |}| |}t ||S N)structcalcsizer   unpack)r   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_boxesB   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   has_next_boxG   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||| | _ |S )	Nr   r   z>I4sr   z>Q      zInvalid header length)r   r	   seekosSEEK_CURr"   r   r   )r   lboxtboxhlenr   r   r   r   next_box_typeM   s   

zBoxReader.next_box_typeN)r   )__name__
__module____qualname____doc__r   r   r   r"   r%   r'   r0   r   r   r   r   r      s    

r   c                 C  s$  |  d}t|}||  |d  }td|\}}}}}}}	}	}	}	}
dg|
 }dg|
 }dg|
 }t|
D ]}td|dd|  \||< ||< ||< q7|| || f}|
dkrn|d d	@ d
krhd}||fS d}||fS |
dkrxd}||fS |
dkrd}||fS |
dkrd}||fS d}||fS )zParse the JPEG 2000 codestream to extract the size and component
    count from the SIZ marker segment, returning a PIL (size, mode) tuple.   z>HHIIIIIIIIHNz>BBB$      r   r      r)   I;16LLARGB   RGBA)r   r   i16ber   unpack_fromrange)r	   hdrlsizsizrsizxsizysizxosizyosiz_csizssizxrsizyrsizir!   moder   r   r   _parse_codestreamc   s:   




*
rQ   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   rW   c                 C  s  t | }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|||}t|||}|dur|dur||f}	n| s| s:|du s|du rd}t|||||	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   r8   r)   r9   r:   r5   r;   r7   r<   r=   r>   s   res s   rescz>HHHHBBzMalformed JP2 header)r   r'   r0   r%   r"   rW   r   )r	   readerheadermimetyper.   r!   rP   bpcncdpiheightwidthrestresvrcnvrcdhrcnhrcdvrcehrcehresvresr   r   r   r   _parse_jp2_header   sd   
rj   c                      sN   e Zd ZdZdZdd Zdd Ze fddZej	d	d Zd
d Z
  ZS )Jpeg2KImageFileJPEG2000zJPEG 2000 (ISO 15444)c                 C  s~  | j d}|dkrd| _t| j \| _| _n:|| j d }|dkrKd| _t| j }|\| _| _| _}|d ur=|| jd< | j d	d	rJ| 
  nd
}t|| jd u s[| jd u rad}t|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=      OQj2kr)         jP  

jp2r]      s   jp2cOQznot a JPEG 2000 filezunable to determine size/moder   r   jpeg2kr   r   )r	   r   codecrQ   _size_moderj   custom_mimetypeinfoendswith_parse_commentr   r!   rP   _reducelayersfilenor+   fstatst_size	Exceptionr   r*   r#   SEEK_ENDtile)r   sigrY   r]   r   fdr   posr   r   r   _open   sX   





zJpeg2KImageFile._openc                 C  s   | 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)Nr5   Tr   )      d   comment)r	   r   r   r?   r*   r+   r,   rx   )r   rB   r   markertypr   r   r   rz     s"   

zJpeg2KImageFile._parse_commentc                   s   | j pt jS r   )r{   superreducer&   	__class__r   r   r     s   zJpeg2KImageFile.reducec                 C  s
   || _ d S r   )r{   )r   valuer   r   r   r   "  s   
c                 C  s   | j rO| jrOd| 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   r7   r=   rs   r5   )r   r{   intr!   ru   r|   r   load)r   poweradjusttt3r   r   r   r   &  s   

*zJpeg2KImageFile.load)r1   r2   r3   formatformat_descriptionr   rz   propertyr   setterr   __classcell__r   r   r   r   rk      s    4
rk   c                 C  s    | d d dkp| d d dkS )Nr=   rm   rq   ro   r   )prefixr   r   r   _accept7  s   r   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rEtdd |	D sKd}
t|
|dd}|dd }|dd }|dd}|dd}|dd}|dd}|dd}|d}t|tr|	 }|dd}d}t
|drz| }W n ty   d}Y nw |||||	|||||||||||f| _t| |dd| j d|fg d S ) N.j2kno_jp2Frn   rp   offsettile_offset	tile_sizequality_moderatesquality_layersc                 s  s    | ]
}t |ttfV  qd S r   )
isinstancer   float).0quality_layerr   r   r   	<genexpr>R  s    
z_save.<locals>.<genexpr>z,quality_layers must be a sequence of numbersnum_resolutionsr   codeblock_sizeprecinct_sizeirreversibleprogressionLRCPcinema_modenomctsignedr   pltr   r}   rr   rs   )encoderinfory   getr   listtupleall
ValueErrorstrencodehasattrr}   r   encoderconfigr   _saver!   )imr	   filenamerx   kindr   r   r   r   r   r   r   	cblk_sizer   r   r   r   r   r   r   r   r   r   r   r   r   B  sn   


"r   )z.jp2r   z.jpcz.jpfz.jpxz.j2cz	image/jp2)
__future__r   r#   r+   r    r   r   r   r   rQ   rW   rj   rk   r   r   register_openr   register_saveregister_extensionsregister_mimer   r   r   r   <module>   s$   J"@jE
