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PngImagePlugin.cpython-310.pyc
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Returns header information.Nr r zbroken PNG file (chunk �)) r5 �popr4 �seek�read�tell�i32�is_cidr �LOAD_TRUNCATED_IMAGES� SyntaxError�repr)r7 �cid�pos�lengthr' r* r* r+ r< � s zChunkStream.readc C s | S r3 r* �r7 r* r* r+ � __enter__� � zChunkStream.__enter__c G s | � � d S r3 )�close)r7 �argsr* r* r+ �__exit__� s zChunkStream.__exit__c C s d | _ | _| _d S r3 )r5 �crcr4 rF r* r* r+ rI � s zChunkStream.closec C s | j �|||f� d S r3 )r5 �append�r7 rC rD rE r* r* r+ �push� s zChunkStream.pushc C s* t �d|||� t| d|�d� �||�S )z"Call the appropriate chunk handlerzSTREAM %r %s %s�chunk_�ascii)�logger�debug�getattr�decoderN r* r* r+ �call� s zChunkStream.callc C s� t jr|d d? d@ r| �||� dS z t|t|��}t| j�d��}||kr1tdt|�� d���W dS t j yK } z tdt|�� d��|�d}~ww ) zRead and verify checksumr � r Nr z(broken PNG file (bad header checksum in r9 z(broken PNG file (incomplete checksum in ) r r@ �crc_skipr0 r> r4 r< rA rB �struct�error)r7 rC r. �crc1�crc2�er* r* r+ rL � s& ������zChunkStream.crcc C s | j �d� dS )z3Read checksum. Used if the C module is not presentr N)r4 r< )r7 rC r. r* r* r+ rX � s zChunkStream.crc_skip� IENDc C sn g } z | � � \}}}W n tjy } ztd�|�d }~ww ||kr& |S | �|t�| j|�� |�|� q)NTztruncated PNG file) r< rY rZ �OSErrorrL r � _safe_readr4 rM )r7 �endchunk�cidsrC rD rE r] r* r* r+ �verify� s ��� �zChunkStream.verifyN)r^ ) �__name__� __module__� __qualname__r8 r< rG rK rI rO rV rL rX rc r* r* r* r+ r2 � s r2 c @ s e Zd ZdZeddd��ZdS )�iTXtzq Subclass of string to allow iTXt chunks to look like strings while keeping their extra information Nc C s t �| |�}||_||_|S )z� :param cls: the class to use when creating the instance :param text: value for this key :param lang: language code :param tkey: UTF-8 version of the key name )�str�__new__�lang�tkey)�cls�textrj rk r7 r* r* r+ ri � s z iTXt.__new__)NN)rd re rf �__doc__� staticmethodri r* r* r* r+ rg � s rg c @ s6 e Zd ZdZdd� Zd dd�Zddd �Zd d d �Zd S )�PngInfoz< PNG chunk container (for use with save(pnginfo=)) c C s g | _ d S r3 )�chunksrF r* r* r+ r8 s zPngInfo.__init__Fc C s* ||g}|r |� d� | j� t|�� dS )a" Appends an arbitrary chunk. Use with caution. :param cid: a byte string, 4 bytes long. :param data: a byte string of the encoded data :param after_idat: for use with private chunks. Whether the chunk should be written after IDAT TN)rM rq �tuple)r7 rC r. � after_idat�chunkr* r* r+ �add s z PngInfo.add� c C s� t |t�s |�dd�}t |t�s|�dd�}t |t�s!|�dd�}t |t�s,|�dd�}|rE| �d|d | d | d t�|� � dS | �d|d | d | d | � dS ) z�Appends an iTXt chunk. :param key: latin-1 encodable text key name :param value: value for this key :param lang: language code :param tkey: UTF-8 version of the key name :param zip: compression flag �latin-1�strict�utf-8� iTXts � s N)� isinstance�bytes�encoderu r! �compress)r7 �key�valuerj rk �zipr* r* r+ �add_itxt s �(zPngInfo.add_itxtc C s� t |t�r| j|||j|j|d�S t |t�s0z|�dd�}W n ty/ | j|||d� Y S w t |t�s;|�dd�}|rL| �d|d t � |� � dS | �d|d | � dS ) z�Appends a text chunk. :param key: latin-1 encodable text key name :param value: value for this key, text or an :py:class:`PIL.PngImagePlugin.iTXt` instance :param zip: compression flag )r� rw rx � zTXt� � tEXtr{ N) r| rg r� rj rk r} r~ � UnicodeErrorru r! r )r7 r� r� r� r* r* r+ �add_text7 s � zPngInfo.add_textN�F)rv rv F)rd re rf rn r8 ru r� r� r* r* r* r+ rp s rp c s� e Zd Z� fdd�Zdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Z� ZS )+� PngStreamc sR t � �|� i | _i | _d| _d | _d | _d | _d | _d | _ d | _ d | _ d| _ d S )N�r r r ) �superr8 �im_info�im_text�im_size�im_mode�im_tile� im_palette�im_custom_mimetype� im_n_frames�_seq_num� rewind_state� text_memoryr6 �� __class__r* r+ r8 X s zPngStream.__init__c C s. | j |7 _ | j tkrtd| j � d���d S )Nz%Too much memory used in text chunks: z>MAX_TEXT_MEMORY)r� �MAX_TEXT_MEMORYr& )r7 �chunklenr* r* r+ �check_text_memoryi s ���zPngStream.check_text_memoryc C s | j �� | j| jd�| _d S )N)�info�tile�seq_num)r� �copyr� r� r� rF r* r* r+ � save_rewindq s �zPngStream.save_rewindc C s( | j d | _| j d | _| j d | _d S )Nr� r� r� )r� r� r� r� rF r* r* r+ �rewindx s zPngStream.rewindc C s� t �| j|�}|�d�}t�d|d |� � t�d|| � || }|dkr.td|� d���z t||d d � �}W n tyJ t j rGd }n� Y n t j yU d }Y nw || j d< |S ) Nr{ ziCCP profile name %rzCompression method %sr �Unknown compression method z in iCCP chunkr � icc_profile) r r` r4 �findrR rS rA r, r& r@ r! rZ r� )r7 rD rE r' �i� comp_methodr� r* r* r+ � chunk_iCCP} s& �� zPngStream.chunk_iCCPc C s~ t �| j|�}t|d�t|d�f| _zt|d |d f \| _| _W n ty+ Y nw |d r5d| j d< |d r=t d ��|S ) Nr r r � � r � interlace� zunknown filter category) r r` r4 r> r� �_MODESr� � im_rawmode� Exceptionr� rA �r7 rD rE r' r* r* r+ � chunk_IHDR� s � zPngStream.chunk_IHDRc C s\ d| j v rd| j d || jfg}n| jd urd| j d< dd| j || jfg}|| _|| _t�)N�bboxr� T� default_imager� )r� r� r� r� r� �im_idat�EOFError)r7 rD rE r� r* r* r+ � chunk_IDAT� s zPngStream.chunk_IDATc C s t �r3 )r� )r7 rD rE r* r* r+ � chunk_IEND� � zPngStream.chunk_IENDc C s& t �| j|�}| jdkrd|f| _|S )Nr r )r r` r4 r� r� r� r* r* r+ � chunk_PLTE� s zPngStream.chunk_PLTEc C s� t �| j|�}| jdkr(t�|�r!|�d�}|dkr || jd< |S || jd< |S | jdv r6t|�| jd< |S | jdkrKt|�t|d�t|d�f| jd< |S ) Nr r{ r � transparency�r r r r r r ) r r` r4 r� �_simple_palette�matchr� r� �i16)r7 rD rE r' r� r* r* r+ � chunk_tRNS� s � � � zPngStream.chunk_tRNSc C s$ t �| j|�}t|�d | jd< |S )N� j�@�gamma�r r` r4 r> r� r� r* r* r+ � chunk_gAMA� s zPngStream.chunk_gAMAc C sB t �| j|�}t�dt|�d |�}tdd� |D ��| jd< |S )Nz>%dIr c s s � | ]}|d V qdS )r� Nr* )�.0�eltr* r* r+ � <genexpr>� s � z'PngStream.chunk_cHRM.<locals>.<genexpr>� chromaticity)r r` r4 rY �unpack�lenrr r� )r7 rD rE r' �raw_valsr* r* r+ � chunk_cHRM� s zPngStream.chunk_cHRMc C s t �| j|�}|d | jd< |S )Nr �srgb�r r` r4 r� r� r* r* r+ � chunk_sRGB� s zPngStream.chunk_sRGBc C sl t �| j|�}t|d�t|d�}}|d }|dkr)|d |d f}|| jd< |S |dkr4||f| jd< |S )Nr r r r � F%u�?�dpi�aspectr� )r7 rD rE r' �px�py�unitr� r* r* r+ � chunk_pHYs� s �zPngStream.chunk_pHYsc C s� t �| j|�}z |�dd�\}}W n ty |}d}Y nw |rD|�dd�}|�dd�}|dkr3|n|| j|< || j|< | �t |�� |S )Nr{ r � rw rx �replace�exif) r r` r4 �splitr& rU r� r� r� r� )r7 rD rE r' �k�v�v_strr* r* r+ � chunk_tEXt� s � zPngStream.chunk_tEXtc C s� t �| j|�}z |�dd�\}}W n ty |}d}Y nw |r&|d }nd}|dkr4td|� d���z t|dd � �}W n tyN t jrKd}n� Y n tj yY d}Y nw |ry|� dd�}|� dd �}| | j |< | j |< | � t|�� |S ) Nr{ r r� r r� z in zTXt chunkrw rx r� )r r` r4 r� r& rA r, r@ r! rZ rU r� r� r� r� )r7 rD rE r' r� r� r� r* r* r+ � chunk_zTXt s8 � �� zPngStream.chunk_zTXtc C sl t �| j|� }}z |�dd�\}}W n ty | Y S w t|�dk r'|S |d |d |dd � }}}z |�dd�\}} } W n tyM | Y S w |dkry|dkrwzt| �} W n tyk t jrj| Y S � tj yv | Y S w |S z|� dd�}|� dd�}| � dd�} | � dd�} W n t y� | Y S w t | || � | j |< | j|< | �t| �� |S )Nr{ r r r rw rx ry )r r` r4 r� r& r� r, r@ r! rZ rU r� rg r� r� r� ) r7 rD rE �rr' r� �cf�cmrj �tkr� r* r* r+ � chunk_iTXt3 sJ � � � � zPngStream.chunk_iTXtc C s t �| j|�}d| | jd< |S )N� Exif r� r� r� r* r* r+ � chunk_eXIf\ s zPngStream.chunk_eXIfc C sr t �| j|�}| jd urd | _t�d� |S t|�}|dks"|dkr)t�d� |S || _t|d�| jd< d| _|S )Nz4Invalid APNG, will use default PNG image if possibler l r �loopz image/apng) r r` r4 r� �warnings�warnr> r� r� )r7 rD rE r' �n_framesr* r* r+ � chunk_acTLb s zPngStream.chunk_acTLc C s t �| j|�}t|�}| jd u r|dks | jd ur$| j|d kr$td��|| _t|d�t|d�}}t|d�t|d�}}| j\} } || | ksN|| | krRtd��|||| || f| jd < t|d �t|d �} } | dkrpd } t | �t | � d | jd< |d | jd< |d | jd< |S )Nr r �#APNG contains frame sequence errorsr r r� r z APNG contains invalid framesr� � � �d �� �duration� �disposal� �blend) r r` r4 r> r� rA r� r� r� �float) r7 rD rE r' �seq�width�heightr� r� �im_w�im_h� delay_num� delay_denr* r* r+ � chunk_fcTLq s& zPngStream.chunk_fcTLc C sF t �| jd�}t|�}| j|d krtd��|| _| �|d |d �S )Nr r r� )r r` r4 r> r� rA r� )r7 rD rE r' r� r* r* r+ � chunk_fdAT� s zPngStream.chunk_fdAT)rd re rf r8 r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� � __classcell__r* r* r� r+ r� W s, ")r� c C s | d d� t kS )Nr )�_MAGIC)�prefixr* r* r+ �_accept� r1 r c s� e Zd ZdZdZdd� Zedd� �Zdd� Zd d � Z d d d �Z dd� Z dd� Z dd� Z dd� Zdd� Z� fdd�Zdd� Zd d � Z� ZS ) � PngImageFile�PNGzPortable network graphicsc C s� t | j�d��s td��| j| _d| _g | _t| j�| _ | j�� \}}}z | j� |||�}W n0 t y8 Y n0 t y_ t � d|||� t�| j|�}|dd� �� r]| j�||f� Y nw | j�||� q | jj| _| jj| _| jj| _d | _| jj| _| jj | _ | jj p�d| _ | j� dd �| _!| jj"r�| jj"\}}t#�$||�| _%|d kr�|d | _&n|| _&| jj d ur�d | _'| j�(� | j&| _)| j�*� | _+| j!r�| j d7 _ | �,d� | j dk| _-d S ) Nr znot a PNG filer T�%r %s %s (unknown)r r r� F� fdATr ).r r4 r< rA �_PngImageFile__fp�_PngImageFile__frame�private_chunksr� �pngrV r� �AttributeErrorrR rS r r` �islowerrM rL r� �moder� �_sizer� r� �_textr� r� r� �custom_mimetyper� r� �getr� r� r �raw�palette�_PngImageFile__prepare_idat�!_close_exclusive_fp_after_loadingr� �_PngImageFile__rewind_idatr= �_PngImageFile__rewind�_seek� is_animated)r7 rC rD rE r' �rawmoder. r* r* r+ �_open� sX ��� zPngImageFile._openc C sD | j d u r | jr| j}| �| jd � | �� | jr | �|� | j S )Nr )r r r r; r� �load)r7 �framer* r* r+ rm � s zPngImageFile.textc C sZ | j du r td��| j �| jd d d � | j�� | j�� | jr(| j �� d| _ dS )zVerify PNG fileNz)verify must be called directly after openr r r )r4 � RuntimeErrorr; r� r rc rI � _exclusive_fprF r* r* r+ rc � s zPngImageFile.verifyc C s� | � |�sd S || jk r| �dd� | j}t| jd |d �D ] }z| �|� W q ty> } z | �|� td�|�d }~ww d S )Nr Tr zno more images in APNG file)� _seek_checkr r �ranger� r; )r7 r � last_frame�fr] r* r* r+ r; s ���zPngImageFile.seekFc C s� |dkrT|r-| j �| j� | j�� | j| _d | _| jr d | _| jj | _ | jj | _ | j | _ d | _d | _| j �dd�| _| j �d�| _| j �d�| _| j �d�| _d| _n�|| jd krbtd|� ���| �� | jrr| j�| j| j� | j�� | _| j | _ | jr�t�| j | j� d| _d} | j � d � z | j� � \}}}W n t j t fy� Y n`w |d kr�t d ��|d kr�|r�t d��d }z | j�!|||� W n? t"y� Y n8 t y� |dkr�|d 8 }|r�|| _Y n#t�| j |� Y n t#�y t$�%d|||� t�| j |� Y nw q�|| _| jj | _ | j �d�| _| j �d�| _| j �d�| _| j �s,t �| jd u �r;| jt&k�r;t'| _| jt&k�rR| j�� | _| �(| j| j�| _d S | jt'k�rmt)j*�+| j,| j-�| _| �(| j| j�| _d S d | _d S )Nr r� Fr� r� r� r zcannot seek to frame Tr r^ zNo more images in APNG file� fcTLzAPNG missing frame datar r ).r r; r r r� r r �im�pyaccessr� r� r� r� r4 �_prev_im�disposer r� � dispose_op�blend_op�dispose_extentr r& r �paster� r r` r< rY rZ rA r� rV �UnicodeDecodeErrorr rR rS �APNG_DISPOSE_OP_PREVIOUS�APNG_DISPOSE_OP_BACKGROUND�_cropr �core�fillr �size)r7 r r� � frame_startrC rD rE r* r* r+ r s� � �� zPngImageFile._seekc C s | j S r3 )r rF r* r* r+ r= l s zPngImageFile.tellc C s0 | j �d�r | jd | _| j| _tj�| � dS )z"internal: prepare to read PNG filer� )r N)r� r � decoderconfigr �_PngImageFile__idatr � load_preparerF r* r* r+ r7 o s zPngImageFile.load_preparec C s� | j dkrG| j�d� | j�� \}}}|dvr!| j�|||� dS |dkr?z | j�|||� W n ty8 Y nw |d | _ n|| _ | j dks|dkrO| j }nt|| j �}| j | | _ | j�|�S )z internal: read more image datar r )� IDATs DDATr r� r )r6 r4 r< r rO rV r� �min)r7 � read_bytesrC rD rE r* r* r+ � load_readx s( � � zPngImageFile.load_readc C s� | j dkr | j�| j � | j�d� z | j�� \}}}W n tjtfy) Y nmw |dkr/ng|dkrB| jrBd| _| j� |||� nTz | j� |||� W nH t yU Y nA t yl |dkrc|d8 }t �| j|� Y n) ty� t�d|||� t �| j|�}|dd � �� r�| j�||df� Y nw q | jj| _| js�| j�� d | _d S | jr�| jtkr�| �| j | j �}| j� || j |� d �� | j| _ | j r�d | _ d S d S d S d S ) z%internal: finished reading image datar Tr r^ r$ r r r r Nr )!r6 r4 r< r rY rZ rA r r rO rV r- r� r r` r rR rS r r rM r� r rI r' r* �APNG_BLEND_OP_OVERr0 r% r+ r, �convertr& )r7 rC rD rE r' �updatedr* r* r+ �load_end� sZ � ��� � �zPngImageFile.load_endc C s6 d| j vr | �� d| j vrd| j vrd S | �� �� S )Nr� zRaw profile type exif)r� r �getexif�_get_merged_dictrF r* r* r+ �_getexif� s zPngImageFile._getexifc s d| j vr | �� t� �� S )Nr� )r� r r� r@ rF r� r* r+ r@ � s zPngImageFile.getexifc C s d| j v r | �| j d �S i S )z� Returns a dictionary containing the XMP tags. 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