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ImageFile.cpython-310.pyc
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o _#�aSR � @ s� d dl Z d dlZd dlZd dlZddlmZ ddlmZ dZdZ dZ dd d d d d �Z dd� Z dd� Z G dd� dej�ZG dd� de�ZG dd� d�Zd dd�Zdd� ZG d d � d �ZG d d � d �ZdS )!� N� )�Image)�isPathi i Fzimage buffer overrun errorzdecoding errorz unknown errorzbad configurationzout of memory error)���������i����i����c C sH zt j�| �}W n ty t�| �}Y nw |s d| � �}t|d ��)Nzdecoder error z when reading image file)r �core�getcodecstatus�AttributeError�ERRORS�get�OSError)�error�message� r �//usr/lib/python3/dist-packages/PIL/ImageFile.py� raise_oserror< s � r c C s | d S )N� r )�tr r r � _tilesortF � r c sR e Zd ZdZd� fdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z � Z S )� ImageFilez*Base class for image file format handlers.Nc s� t � �� d| _d | _d | _ d| _d| _t| _t |�r)t |d�| _ || _ d| _ n || _ || _ d | _ z/z| �� W n tttttjfyP } zt|�|�d }~ww | jr[| jd dkr_td��W d S tyq | j rp| j �� � w )Nr r r �rbTz not identified by this driver)�super�__init__� _min_frame�custom_mimetype�tile�readonly� decoderconfig�MAXBLOCK�decodermaxblockr �open�fp�filename� _exclusive_fp�_open� IndexError� TypeError�KeyError�EOFError�structr � SyntaxError�mode�size� BaseException�close)�selfr# r$ �v�� __class__r r r S sH � �� � �zImageFile.__init__c C s, | j r| j S | jd urtj�| j�� �S d S �N)r �formatr �MIMEr �upper�r1 r r r �get_format_mimetype� s �z ImageFile.get_format_mimetypec C s | j r| j�� d| _dS )zCheck file integrityN)r% r# r0 r9 r r r �verify� s zImageFile.verifyc C sj | j du r td��tj�| �}| j s|S d| _| jo t| j �dk}|o(ttd� }d}z| j }d}W n t y? | j j }Y nw z| j }d}W n t yT | j j}Y nw |r�| j d \}}}} |dkr�t| �dkr�| d | jkr�| d tjv r�z=ddl} t| j��} | j| �� d| jd �| _W d � n1 s�w Y tj�| j| j||| �| _d}| jr�d| j_W n t ttfy� d| _Y nw | � � d } | j�s�| j j t d � z| j } W n t y� d } Y nw d d� t �!| j dd� �D �| _ | j D ]�\}}}} t�"| j|| | j#�}zv||� |�$| j|� |j%�r'|�&| j � |�'d �\}} nS| } z|| j(�}W n t)t*j+f�yO } zt,�rFW Y d}~n4td�|�d}~ww |�sat,�rWn#tdt|�� d���|| }|�'|�\}} |dk �rrn||d� }�q*W |�-� q�|�-� w g | _ || _.| �/� | j0�r�| j1�r�| j �2� d| _ | j�s�t,�s�| dk �r�t3| � tj�| �S )z"Load image data based on tile listNzcannot load this imager �pypy_version_infor F�raw� )�accessr ��key� c S s g | ] \}}t |�d �qS )r )�list)�.0�_�tilesr r r � <listcomp>� s ��z"ImageFile.load.<locals>.<listcomp>c S s | d | d | d fS )Nr r r> r )r r r r �<lambda>� s z ImageFile.load.<locals>.<lambda>Tzimage file is truncatedzimage file is truncated (z bytes not processed))4r r r �load�mapr$ �len�hasattr�sys� load_readr r# �read� load_seek�seekr- � _MAPMODES�mmapr" �fileno� ACCESS_READr � map_bufferr. �im�palette�dirty� ImportError� load_prepare�sortr � tile_prefix� itertools�groupby� _getdecoderr �setimage�pulls_fd�setfd�decoder! r' r+ r �LOAD_TRUNCATED_IMAGES�cleanupr �load_endr% �!_close_exclusive_fp_after_loadingr0 r )r1 �pixel�use_mmapr rO rQ � decoder_name�extents�offset�argsrS r# �err_code�prefix�decoder�status�b�s�e�nr r r rI � s� � � ��� � � �� � ���� �� zImageFile.loadc C sT | j r| j j| jks| j j| jkrtj�| j| j�| _ | jdkr(tj�| � d S d S )N�P)rW r- r. r r �newrI r9 r r r r[ s " �zImageFile.load_preparec C s d S r5 r r9 r r r rg s zImageFile.load_endc C sB || j k st| d�r| jd u s|| j| j krtd��| �� |kS )N� _n_framesz attempt to seek outside sequence)r rL ry �n_framesr* �tell)r1 �framer r r � _seek_check( s � zImageFile._seek_check)NN) �__name__� __module__� __qualname__�__doc__r r: r; rI r[ rg r} � __classcell__r r r3 r r P s / r c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) � StubImageFilez� Base class for stub image loaders. A stub loader is an image loader that can identify files of a certain format, but relies on external code to load the file. c C � t d��)Nz+StubImageFile subclass must implement _open��NotImplementedErrorr9 r r r r& ? s zStubImageFile._openc C sL | � � }|d u rtd| j� d���|�| �}|d us J �|j| _|j| _d S )Nz cannot find loader for this z file)�_loadr r6 rI r4 �__dict__)r1 �loader�imager r r rI B s zStubImageFile.loadc C r� )z (Hook) Find actual image loader.z+StubImageFile subclass must implement _loadr� r9 r r r r� L r zStubImageFile._loadN)r~ r r� r� r& rI r� r r r r r� 7 s r� c @ sP e Zd ZdZdZdZdZdZdZdZ dd� Z dd� Z dd � Z d d � Z d d � ZdS )�Parserzj Incremental image parser. This class implements the standard feed/close consumer interface. Nr c C s | j du s J d��dS )z� (Consumer) Reset the parser. Note that you can only call this method immediately after you've created a parser; parser instances cannot be reused. Nzcannot reuse parsers)�datar9 r r r �reset^ s z Parser.resetc C s� | j rdS | jdu r|| _n| j| | _| jrh| jdkr=tt| j�| j�}| j|d� | _| j| | _| jdks;| js=dS | j�| j�\}}|dk r^d| _d| _ |dk r\d| _t|� ndS | j|d� | _dS | jrmdS z t � | j�� }t � |�}W d � n1 s�w Y W n t y� Y dS w t|d�p�t|d�}|s�t|j�dkr�d| _n:|�� |jd \}}} } g |_t �|j|| |j�| _| j�|j|� | | _| jt| j�kr�| j| jd� | _d| _|| _dS )z� (Consumer) Feed data to the parser. :param data: A string buffer. :exception OSError: If the parser failed to parse the image file. Nr r rP rN )�finishedr� rq rm �minrK rd r� r �io�BytesIOr r" r rL r r[ r` r- r ra rW ) r1 r� �skiprv ru r# rW �flag�d�o�ar r r �feedf sX �� � z Parser.feedc C s | S r5 r r9 r r r � __enter__� s zParser.__enter__c G s | � � d S r5 )r0 �r1 rn r r r �__exit__� s zParser.__exit__c C s� | j r| �d� d | _| _ | jstd��| js td��| jrKt�| j�� }z t� |�| _W | j� � n| j� � w W d � | jS 1 sFw Y | jS )a (Consumer) Close the stream. :returns: An image object. :exception OSError: If the parser failed to parse the image file either because it cannot be identified or cannot be decoded. rB Nzimage was incompletezcannot parse this image) rq r� r� r� r r� r� r� r r" rI )r1 r# r r r r0 � s ��z Parser.close)r~ r r� r� � incrementalr� r� rq rm r� r� r� r� r� r0 r r r r r� Q s P r� c C s� | � � t| d�s d| _|jtd� tt|| jd d �}z |�� }|� � W nj t t j fy� } z[|D ]R\}}}} t �| j|| | j�}|dkrM|�|� |�| j|� |jrc|�|� |�� \} } n |�|�\} } } |�| � | rtnqd| dk r�td| � d��|�|�� q4W Y d }~nMd }~ww |D ]E\}}}} t �| j|| | j�}|dkr�|�|� |�| j|� |jr�|�|� |�� \} } n|�||�} | dk r�td| � d���|�� q�t|d �r�|� � d S d S ) z�Helper to save image based on tile list :param im: Image object. :param fp: File object. :param tile: Tile list. :param bufsize: Optional buffer size � encoderconfigr r@ r � Tzencoder error z when writing image fileN�flush)rI rL r� r\ r �maxr r. rT r� r r� �UnsupportedOperationr � _getencoderr- rQ ra rW � pushes_fdrc �encode_to_pyfd�encode�writer rf �encode_to_file) rW r# r �bufsize�fh�excru rs r� r� �lrt r� r r r �_save� sX � ��� �r� c C s� |dkrdS |t kr| �|�}t|�|k rtd��|S g }|}|dkr=| �t|t ��}|s.n|�|� |t|�8 }|dks#tdd� |D ��|k rLtd��d�|�S )a� Reads large blocks in a safe way. Unlike fp.read(n), this function doesn't trust the user. If the requested size is larger than SAFEBLOCK, the file is read block by block. :param fp: File handle. Must implement a <b>read</b> method. :param size: Number of bytes to read. :returns: A string containing <i>size</i> bytes of data. Raises an OSError if the file is truncated and the read cannot be completed r rB zTruncated File Readc s s � | ]}t |�V qd S r5 )rK )rD r� r r r � <genexpr>3 s � z _safe_read.<locals>.<genexpr>)� SAFEBLOCKrO rK r r� �append�sum�join)r# r. r� �remaining_size�blockr r r � _safe_read s& � r� c @ s e Zd Zdd� Zdd� ZdS )� PyCodecStatec C s d| _ d| _d| _d| _d S )Nr )�xsize�ysize�xoff�yoffr9 r r r r 9 s zPyCodecState.__init__c C s | j | j| j | j | j| j fS r5 )r� r� r� r� r9 r r r rl ? s zPyCodecState.extentsN)r~ r r� r rl r r r r r� 8 s r� c @ s\ e Zd ZdZdZdd� Zdd� Zedd� �Zd d � Z d d � Z d d� Z ddd�Z ddd�Z dS )� PyDecoderz� Python implementation of a format decoder. Override this class and add the decoding logic in the :meth:`decode` method. See :ref:`Writing Your Own File Decoder in Python<file-decoders-py>` Fc G s( d | _ t� | _d | _|| _| �|� d S r5 )rW r� �state�fdr- �init)r1 r- rn r r r r M s zPyDecoder.__init__c C � || _ dS )z� Override to perform decoder specific initialization :param args: Array of args items from the tile entry :returns: None N)rn r� r r r r� T � zPyDecoder.initc C s | j S r5 )� _pulls_fdr9 r r r rb ] s zPyDecoder.pulls_fdc C s t � �)a= Override to perform the decoding process. :param buffer: A bytes object with the data to be decoded. :returns: A tuple of ``(bytes consumed, errcode)``. If finished with decoding return <0 for the bytes consumed. Err codes are from :data:`.ImageFile.ERRORS`. r� )r1 �bufferr r r rd a s zPyDecoder.decodec C s dS )zV Override to perform decoder specific cleanup :returns: None Nr r9 r r r rf l s zPyDecoder.cleanupc C r� )z� Called from ImageFile to set the python file-like object :param fd: A python file-like object :returns: None N)r� )r1 r� r r r rc t r� zPyDecoder.setfdNc C s� || _ |r |\}}}}nd\}}}}|dkr%|dkr%| j j\| j_| j_n|| j_|| j_|| | j_|| | j_| jjdksE| jjdkrItd��| jj| jj | j jd kse| jj| jj | j jd kritd��dS )z� Called from ImageFile to set the core output image for the decoder :param im: A core image object :param extents: a 4 tuple of (x0, y0, x1, y1) defining the rectangle for this tile :returns: None )r r r r r zSize cannot be negativer z Tile cannot extend outside imageN)rW r. r� r� r� r� r� � ValueError)r1 rW rl �x0�y0�x1�y1r r r ra } s �zPyDecoder.setimagec C sd |s| j }t�| j d|�}|�| j| j�� � |�|�}|d dkr&td��|d dkr0td��dS )a Convenience method to set the internal image from a stream of raw data :param data: Bytes to be set :param rawmode: The rawmode to be used for the decoder. If not specified, it will default to the mode of the image :returns: None r= r znot enough image datar zcannot decode image dataN) r- r r` ra rW r� rl rd r� )r1 r� �rawmoder� rt r r r � set_as_raw� s �zPyDecoder.set_as_rawr5 )r~ r r� r� r� r r� �propertyrb rd rf rc ra r� r r r r r� C s #r� )r )r� r^ r+ rM � r �_utilr r r� re r r r r r� r� r� r� r� r� r r r r �<module> s8 � h ;!