a
    Sic                     @   s  d dl Z d dlZd dlZd dlZd dlmZ ddlmZmZm	Z	m
Z
mZ ddlmZ ddlmZ ddlmZ G dd	 d	eZejZd
d ZG dd de	j	ZddddZdd Zdd Zdd Zdd Zdd Zd9ddZdd Zd d! Zd"d# Z dZ!d$d% Z"d&d' Z#d(d) Z$d*d+ Z%d,d- Z&d.d/ Z'd0d1 Z(d:d2d3Z)d;d5d6Z*e+ej,ee e-ej,e e.ej,e e/ej,d7 e0ej,d8 dS )<    N)IntEnum   )Image
ImageChops	ImageFileImagePaletteImageSequence)i16le)o8)o16lec                   @   s   e Zd ZdZdZdZdZdS )LoadingStrategyz.. versionadded:: 9.1.0r   r      N)__name__
__module____qualname____doc__RGB_AFTER_FIRST RGB_AFTER_DIFFERENT_PALETTE_ONLY
RGB_ALWAYS r   r   N/var/www/html/django/DPS/env/lib/python3.9/site-packages/PIL/GifImagePlugin.pyr   '   s   r   c                 C   s   | d d dv S )N   )s   GIF87as   GIF89ar   )prefixr   r   r   _accept6   s    r   c                       s~   e Zd ZdZdZdZdZdd Zdd Zd	d
 Z	e
dd Ze
dd Zdd ZdddZ fddZdd Zdd Z  ZS )GifImageFileZGIFzCompuserve GIFFNc                 C   s,   | j d}|r(|d r(| j |d S d S )Nr   r   )fpread)selfsr   r   r   dataG   s    zGifImageFile.datac                 C   sX   t dt|dD ]B}|d ||   krJ||d    krJ||d  ksn  dS qdS )Nr      r   r   TF)rangelen)r   pir   r   r   _is_palette_neededM   s    8zGifImageFile._is_palette_neededc                 C   s   | j d}t|std|d d | jd< t|dt|df| _g | _|d }|d@ d }|d	@ r|d
 | jd< | j d|> }| |rt	
d|}| | _| _| j | _| j  | _d | _d | _| d d S )N   znot a GIF filer   version   
      r         
backgroundr    RGBr   )r   r   r   SyntaxErrorinfoi16_sizetiler%   r   rawglobal_palettepalette_fptell_GifImageFile__rewind	_n_frames_is_animated_seek)r   r   flagsbitsr#   r   r   r   _openS   s&    
zGifImageFile._openc                 C   s^   | j d u rX|  }z| |  d d qW n  tyL   |  d | _ Y n0 | | | j S )Nr   F)r:   r8   r<   EOFErrorseekr   currentr   r   r   n_frameso   s    

zGifImageFile.n_framesc                 C   sv   | j d u rp| jd ur"| jdk| _ nN|  }|r6d| _ n:z| dd d| _ W n tyd   d| _ Y n0 | | | j S )Nr   TF)r;   r:   r8   r<   r@   rA   rB   r   r   r   is_animated{   s    



zGifImageFile.is_animatedc                 C   s   |  |sd S || jk r(d | _| d | j}t| jd |d D ]L}z| | W qB ty } z | | td|W Y d }~qBd }~0 0 qBd S )Nr   r   zno more images in GIF file)_seek_check_GifImageFile__frameimr<   r!   r@   rA   )r   frame
last_framefer   r   r   rA      s    



zGifImageFile.seekTc                    s  |dkrBd _ d  _d _ j j d _d jv rT jd= n jrT|rT 	  | jd krpt
d|  j _ j r j j    rqd _  jd}|r|dkrtg  _d }i }d }d }d }|s jd}|r|dkrqnnr|dkrJ jd}  }	|d dkrl|	d }
|
d@ r<|	d	 }t|	dd
 |d< d|
@ }|d? }|r8| _n|d dkrd}|	r||	7 }  }	q~d|v r|d  d| 7  < n||d< d }qnp|d dkr8|dkr8|	 j f|d< |	d d dkr8  }	t|	d	kr8|	d dkr8t|	d jd<   rhq8n|dkrh jd}t|dt|d }}|t|d |t|d  }}| jd ks| jd kr|rt| jd t| jd f _t j ||||f}|d }
|
d@ dk}|
d@ rF|
d@ d } jd	|> } |rFtd|} jdd } j  _ qnn d }q|d u r|t| _|sd S  jr j j j |p j _|dkr jrtt j!krdnd _"nd  _"|s jrdd!l#m#} | j}| _$n| _% j"dkrtt j&ks4|rd  _'d" jv r~ j( jd" d  j)d#tj*j+ _d# _" jd"= nd _" j)dtj*j+ _ fd$d%}| _zJ jdk rd  _n0 jdkrl j\}}}}|| || f}t| d} j,d"|}|d ur2 j"d&v rXd#}||d' }n& j,d(d} j"d&v rXd}||}tj-.||| _n jd ur / j j _nh|d ur j\}}}}|| || f}t| d}|} j"d&v rd#}||d' }tj-.||| _W n t0y
   Y n0 |d urjd}|d urJ|dkr:| jd"< n j"d&vrJ|}d)||||f j |||ffg _|,dr|d  jd< d*D ]4}||v r||  j|< n| jv r j|= qd S )+Nr   commentr   zcannot seek to frame    ;   !   r    r)   duration   r             
   	extensionr,      NETSCAPE2.0loop   ,	      r   r(   @   r+   r*   r.   PL)copytransparencyRGBAc                    s6    j r(t j j| d | d d  } n
| | | f} | S )Nr    )_frame_palettetupler6   )colorr   r   r   _rgbL  s    "
z GifImageFile._seek.<locals>._rgbr.   rc   )r   r-   gif)rR   rX   )1Z_GifImageFile__offsetdisposerG   r7   rA   r9   Zdisposal_methodr0   r3   load
ValueErrorr   r   r   r@   r1   r8   r"   sizemaxr2   r   _decompression_bomb_checkr%   r   r4   rH   pastedispose_extentr5   rd   LOADING_STRATEGYr   r   modera   r6   _frame_transparencyr   pyaccessputpalettealphaconvertDitherFLOYDSTEINBERGgetcorefill_cropAttributeError)r   rI   Zupdate_imager   r6   r0   Zframe_transparency	interlaceZframe_dispose_extentblockr=   Zdispose_bitsrN   x0y0x1y1r>   r#   ra   rh   Zdispose_sizeZdispose_moderf   rb   kr   rg   r   r<      sJ   







&"













	
zGifImageFile._seekc                    s   | j r
dnd}d | _| jdkrDd| jv rtj|| j| jd | _nL| j	dv r| j| _| j rtjd| j| j
ppd| _| jj| j    nd | _|| _	d | _ t   d S )Nr_   r`   r   rb   ri   )rd   _prev_imrG   r0   r   r|   r}   rn   rH   rt   ru   
putpalettegetdatasuperload_prepare)r   Z	temp_mode	__class__r   r   r     s     


zGifImageFile.load_preparec                 C   s   | j dkr<| jdkr8ttjkr8d| _| jdtjj	| _d S | jdkr| j
r| jd urt| j| jd | jd}q| jd}n| j
sd S | j}| || j}| j
| _| jj| _|jdkr| j|| j| n| j|| j d S )Nr   r_   r.   rc   )rG   rt   rs   r   r   rH   rx   r   ry   rz   r   ru   rw   r~   rr   rq   )r   Zframe_imr   r   r   load_end  s&    



zGifImageFile.load_endc                 C   s   | j S N)rG   rg   r   r   r   r8     s    zGifImageFile.tell)T)r   r   r   formatformat_description!_close_exclusive_fp_after_loadingr5   r   r%   r?   propertyrD   rE   rA   r<   r   r   r8   __classcell__r   r   r   r   r   ?   s"   


 }r   r`   r_   )1r`   r_   c                 C   s   | j tv r|   | S t| j dkr|| jdtjjd} | jj dkrx| jj	
 D ]&}|d dkrP| jj	| | jd<  qxqP| S | dS )	a  
    Takes an image (or frame), returns an image in a mode that is appropriate
    for saving in a Gif.

    It may return the original image, or it may return an image converted to
    palette or 'L' mode.

    :param im: Image object
    :returns: Image object
    r.   r_   r6   rc   r    r   rb   r`   )rt   RAWMODErl   r   getmodebaserx   PaletteADAPTIVEr6   colorskeysr0   )rH   rgbar   r   r   _normalize_mode  s    
r   c           	   	   C   sn  d}|r>t |tttfr(t|dd }t |tjr>t|j}| jdkrb|s| jddd }n*|s|tdd t	dD }tjd|d| _|rBg }t	dt
|d	D ]J}t|||d	  }z| jj| }W n ty   d}Y n0 || qt|D ]:\}}|du rt	t
|D ]}||vr|||<  qqq| |} n t| |}|durb| ||S || j_| S )
at  
    Normalizes the palette for image.
      - Sets the palette to the incoming palette, if provided.
      - Ensures that there's a palette for L mode images
      - Optimizes the palette if necessary/desired.

    :param im: Image object
    :param palette: bytes object containing the source palette, or ....
    :param info: encoderinfo
    :returns: Image object
    Ni   r_   r.   c                 s   s   | ]}|d  V  qdS )r    Nr   ).0r$   r   r   r   	<genexpr>  rU   z%_normalize_palette.<locals>.<genexpr>r   r   r    )
isinstancebytes	bytearraylistr   r6   rt   rH   
getpaletter!   r"   re   r   KeyErrorappend	enumerateremap_palette_get_optimize)	rH   r6   r0   source_paletteused_palette_colorsr$   Zsource_colorindexjr   r   r   _normalize_palette  sB    






r   c              	   C   s   t | }|j D ]\}}| j|| qt||| j}t|| jD ]}|| qDd}t| rh|dB }t	|| d| dt| f|_
t||dd| j dt|j fg |d d S )Nr   r^   r   r   r(   rj       )r   r0   itemsencoderinfo
setdefaultr   _get_global_headerwriteget_interlace_write_local_headerencoderconfigr   _savern   r   rt   )rH   r   r6   im_outr   vr   r=   r   r   r   _write_single_frame  s    $r   c              	   C   s   | j d}| j d| jd}g }d}d }t| g| j dg D ]}t|D ]}	t|	 }	|dkr|	j	 D ] \}
}|
dkrqz| j 
|
| qz| j  }t|	||}	d|	jv r|
d|	jd  t|ttfr|| |d< n$|d u rd|	jv r|	jd |d< t|ttfr*|| |d< |d7 }|r|d }|ddkr|d u r| j d| jdd	}t|	|}td
|	j|}||d d j |}n|d }t|	t|krt|	|}nt|	d|d}| }|s|rV|d d  |d 7  < qVnd }||	||d qVqFt|dkr|D ]}|d }	|d s|t|	|d D ]}|| qdd}n0|sd|d d< |	|d }	|d d d }t||	||d  q@dS d| j v rt| j d ttfrt | j d | j d< d S )NrR   disposalr   append_imagesrb   r   rM   r   )r   r   r   r_   rH   r.   r   )rH   bboxr   r   r   Tinclude_color_table)!r   r{   r0   	itertoolschainr   Iteratorr   ra   r   r   r   r   r   re   _get_backgroundr   newrn   r   r6   _get_palette_bytesr   subtract_modulorx   getbboxr   r"   r   r   crop_write_frame_datasum)rH   r   r6   rR   r   	im_framesframe_countZbackground_im
imSequenceim_framer   r   r   previousrf   r-   base_imdeltar   
frame_datar   offsetr   r   r   _write_multiple_frames4  s    




r   c                 C   s   t | ||dd d S )NT)save_all)r   )rH   r   filenamer   r   r   	_save_all  s    r   Fc                 C   s   d| j v sd| jv r,| j d| jd}nd }| j dd| j d< |rTt| ||s`t| || |d t|dr||  d S )Nr6   optimizeTrO   flush)r   r0   r{   r   r   r   hasattrr   )rH   r   r   r   r6   r   r   r   r     s    

r   c                 C   s$   | j dd}t| jdk r d}|S )Nr   r      r   )r   r{   minrn   )rH   r   r   r   r   r     s    r   c              	   C   s  d}z,d|j v r|j d }n
|jd }t|}W n ttfyF   Y n@0 d}t||j }|d urz||}W n ty   d}Y n0 d|j v rt|j d d }nd}t|j dd}|s|dks|r&|rdnd}	|	|d	> O }	|sd}| d
t	d t	d t	|	 t
| t	| t	d  |j d}
|
r^t|}t|}|r^|dB }||B }| dt
|d  t
|d  t
|jd  t
|jd  t	|  |
r|r| t| | t	d d S )NFrb   TrR   r)   r   r   r   r   rP   rQ   r]   r   r+   r[   r(   )r   r0   intr   rm   r   r   r{   r   r
   o16r   _get_color_table_sizern   _get_header_palette)r   rH   r   r=   Ztransparent_color_existsrb   r   rR   r   Zpacked_flagr   palette_bytescolor_table_sizer   r   r   r     s|    






r   c           
      C   s  |   }zt|d}| jdkr8tjd|g|tjd ntdd|g}dg}tj|tjtjd}tj||j|tjd}|j	  |
 }	|	rt|	||
 }	|	rt|	|W d    n1 s0    Y  W zt| W n ty   Y n0 n&zt| W n ty   Y n0 0 d S )Nwbr.   Zppmtogif)stdoutstderrZppmquant256)stdinr   r   )_dumpopenrt   
subprocess
check_callDEVNULLPopenPIPEr   closewaitCalledProcessErrorosunlinkOSError)
rH   r   r   tempfilerK   Z	quant_cmdZ	togif_cmdZ
quant_procZ
togif_procretcoder   r   r   _save_netpbm  sB    



,r   c                 C   s   | j dv r|r|ddrtp&| j dk}|s<| j| j dk rg }t|  D ]\}}|rL|| qL|sxt|t	|kr||S t	| j
j
t| j
j  }d|d  > }t	||d kr|dkr|S dS )	aL  
    Palette optimization is a potentially expensive operation.

    This function determines if the palette should be optimized using
    some heuristics, then returns the list of palette entries in use.

    :param im: Image object
    :param info: encoderinfo
    :returns: list of indexes of palette entries in use, or None
    )r_   r`   r   r   r`   i   r   r   N)rt   r{   _FORCE_OPTIMIZEwidthheightr   	histogramr   ro   r"   r6   r   getmodebands
bit_length)rH   r0   Zoptimiser   r$   countZnum_palette_colorsZcurrent_palette_sizer   r   r   r     s$    r   c                 C   s:   | sdS t | dk rdS ttt | d dd S d S )Nr   r\   r   r    r   )r"   mathceillog)r   r   r   r   r   L  s
    r   c                 C   s<   t | }d|> t| d  }|dkr8| tdd | 7 } | S )z
    Returns the palette, null padded to the next power of 2 (*3) bytes
    suitable for direct inclusion in the GIF header

    :param palette_bytes: Unpadded palette bytes, in RGBRGB form
    :returns: Null padded palette
    r   r    r   )r   r"   r
   )r   r   Zactual_target_size_diffr   r   r   r   V  s
    r   c                 C   s   | j j S )z
    Gets the palette for inclusion in the gif header

    :param im: Image object
    :returns: Bytes, len<=768 suitable for inclusion in gif header
    r   )rH   r   r   r   r   h  s    r   c              
   C   sn   d}|rj|}t |trjz| j|| }W n@ tyh } z(t|dkrRW Y d }~dS  W Y d }~n
d }~0 0 |S )Nr   z$cannot allocate more than 256 colors)r   re   r6   getcolorrm   str)rH   Zinfo_backgroundr-   rL   r   r   r   r   r  s    
r   c                 C   sx  d}| j ddks<|r@d|v s<d|v s<|ds<|dr@d}t| |d}t| }t|}d	| t| jd
  t| jd  t|d t|td
 t|g}d|v r|	dtd td d td td t|d  td
  |drtdtd }|d }t
|tr"| }td
t|dD ]*}	||	|	d  }
|tt|
|
 7 }q2|td
7 }|	| |S )z2Return a list of strings representing a GIF headers   87ar'   s   89arb   rZ   rR   rN   r-   s   GIFr   r   r+   rP   rW   r,   rY   r    rT   )r0   r{   r   r   r   r   rn   r
   r   r   r   r  encoder!   r"   )rH   r0   r'   r-   r   r   headerZcomment_blockrN   r$   subblockr   r   r   r     sp    	



r   c              	   C   sV   zJ||_ t| ||d t|| dd|j dt|j fg | d W |` n|` 0 d S )Nr   rj   r   r   )r   r   r   r   rn   r   rt   r   )r   r   r   paramsr   r   r   r     s    r   c                 C   sd   t | |}|du ri }d|vr6d| jv r6| jd |d< t| ||}|j| _|j| _t| |}||fS )a  
    Legacy Method to get Gif data from image.

    Warning:: May modify image data.

    :param im: Image object
    :param palette: bytes object containing the source palette, or ....
    :param info: encoderinfo
    :returns: tuple of(list of header items, optimized palette)

    Nr-   )r   r0   r   r6   rH   r   )rH   r6   r0   r   Zim_modr  r   r   r   	getheader  s    

r
  r   c                 K   s0   G dd d}|    | }t|| || |jS )a  
    Legacy Method

    Return a list of strings representing this image.
    The first string is a local image header, the rest contains
    encoded image data.

    To specify duration, add the time in milliseconds,
    e.g. ``getdata(im_frame, duration=1000)``

    :param im: Image object
    :param offset: Tuple of (x, y) pixels. Defaults to (0, 0)
    :param \**params: e.g. duration or other encoder info parameters
    :returns: List of bytes containing GIF encoded frame data

    c                   @   s   e Zd Zg Zdd ZdS )zgetdata.<locals>.Collectorc                 S   s   | j | d S r   )r   r   )r   r   r   r   r   r   	  s    z getdata.<locals>.Collector.writeN)r   r   r   r   r   r   r   r   r   	Collector  s   r  )rl   r   r   )rH   r   r	  r  r   r   r   r   r     s
    r   z.gifz	image/gif)F)NN)r   )1r   r  r   r   enumr    r   r   r   r   r   _binaryr	   r1   r
   r   r   r   r   rs   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r
  r   register_openr   register_saveregister_save_allregister_extensionregister_mimer   r   r   r   <module>   sP   		   5T

B2.

>

$