o
    aK                  
   @   s~  d Z ddlmZ ddlmZ ddlmZ ddlmZ ddl	m
Z
 ddlZddlmZ ddlZeeZG d	d
 d
eZdZdZdddddddddd	ZefddZG dd deZdZeeZdZeeZdZeeZdZ ee Z!dZ"ee"Z#G d d! d!eZ$G d"d# d#e$Z%G d$d% d%e$Z&G d&d' d'Z'd(d) Z(d*d+ Z)d,d- Z*ed.krddl+Z+ddl,Z,e+-e,. j/ dS dS )/a  ttLib/sfnt.py -- low-level module to deal with the sfnt file format.

Defines two public classes:
	SFNTReader
	SFNTWriter

(Normally you don't have to use these classes explicitly; they are
used automatically by ttLib.TTFont.)

The reading and writing of sfnt files is separated in two distinct
classes, since whenever the number of tables changes or whenever
a table's length changes you need to rewrite the whole file anyway.
    )BytesIO)SimpleNamespace)Tag)sstruct)
TTLibErrorN)OrderedDictc                   @   sZ   e Zd Zdd ZdddZdd ZeZd	d
 Zdd Zdd Z	dd Z
dd Zdd ZdS )
SFNTReaderc                 O   s^   |r*| t u r*|d }|d t|d}|d |dkr*ddlm} t|S t| S )zb Return an instance of the SFNTReader sub-class which is compatible
		with the input file type.
		r      ZwOF2)WOFF2Reader)r   seekr   readfontTools.ttLib.woff2r
   object__new__)clsargskwargsZinfilesfntVersionr
    r   6/usr/lib/python3/dist-packages/fontTools/ttLib/sfnt.pyr      s   



zSFNTReader.__new__r   c                 C   s  || _ || _d | _d | _t| _| j d | j d| _| j d | jdkrft	| j }|j
}d|  kr9|k sBn td|d  || _
| j |j|  | j t}t|tkr^tdtt||  n:| jdkrd| _t| _| j t}t|tkrtd	tt||  n| j t}t|tkrtd
tt||  t| j| _| jdvrtdi }t| jD ]}|  }	|	| j  t|	j}
|	||
< qtt| dd d| _| jdkrt| | _d S d S )Nr   r	   s   ttcfz2specify a font number between 0 and %d (inclusive)   'Not a Font Collection (not enough data)   wOFFwoffz!Not a WOFF font (not enough data)z1Not a TrueType or OpenType font (not enough data))   ZOTTOtruez1Not a TrueType or OpenType font (bad sfntVersion)c                 S   s
   | d j S )Nr   )offset)ir   r   r   <lambda>Y   s   
 z%SFNTReader.__init__.<locals>.<lambda>)key)filecheckChecksumsflavor
flavorDataSFNTDirectoryEntryDirectoryEntryr   r   r   readTTCHeadernumFontsr   offsetTablesfntDirectorySizelenr   unpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatr   range	numTablesfromFiletagr   sorteditemstablesWOFFFlavorData)selfr!   r"   Z
fontNumberheaderr(   datar7   r   entryr4   r   r   r   __init__.   sV   






zSFNTReader.__init__c                 C   s
   || j v S Nr7   r9   r4   r   r   r   has_key_      
zSFNTReader.has_keyc                 C   s
   | j  S r>   )r7   keysr9   r   r   r   rC   d   rB   zSFNTReader.keysc                 C   s   | j t| }|| j}| jrF|dkr%t|dd d |dd  }nt|}| jdkr;||jks9J d| |S ||jkrFtd| |S )zFetch the raw table data.headN             r   zbad checksum for '%s' table)	r7   r   loadDatar!   r"   calcChecksumcheckSumlogZwarning)r9   r4   r<   r;   checksumr   r   r   __getitem__g   s   "

zSFNTReader.__getitem__c                 C   s   | j t|= d S r>   )r7   r   r@   r   r   r   __delitem__y   s   zSFNTReader.__delitem__c                 C   s   | j   d S r>   )r!   closerD   r   r   r   rP   |      zSFNTReader.closec                 C   s@   t | jtr	| jS | j }|d= | jj|d< | j |d< |S )Nr!   	_filename_filepos)
isinstancer!   r   __dict__copynametellr9   stater   r   r   __getstate__   s   
zSFNTReader.__getstate__c                 C   s<   d|vrt |dd| _| j|d | j| d S )Nr!   rR   rbrS   )openpopr!   r   rU   updaterY   r   r   r   __setstate__   s   zSFNTReader.__setstate__N)r   r   )__name__
__module____qualname__r   r=   rA   __contains__rC   rN   rO   rP   r[   r`   r   r   r   r   r      s    
1	r      Fr         rF   
         2   d   )	r      rf   r	   rg   re      rF   	   c                 C   s`   d|  kr
dksn t d| tr|dkr"ddlm} || |S ddlm} || t| dS )a7   Compress 'data' to Zlib format. If 'USE_ZOPFLI' variable is True,
	zopfli is used instead of the zlib module.
	The compression 'level' must be between 0 and 9. 1 gives best speed,
	9 gives best compression (0 gives no compression at all).
	The default value is a compromise between speed and compression (6).
	r   ro   zBad compression level: %s)compress)Znumiterations)
ValueError
USE_ZOPFLIzlibrp   Zzopfli.zlibZOPFLI_LEVELS)r;   levelrp   r   r   r   rp      s   
rp   c                   @   sZ   e Zd Zd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d ZdS )
SFNTWriterc                 O   sb   d}|rd|v r|d }n|rt |dkr|d }| tu r,|dkr,ddlm} t|S t| S )ze Return an instance of the SFNTWriter sub-class which is compatible
		with the specified 'flavor'.
		Nr#   rf   Zwoff2r   )WOFF2Writer)r+   rv   r   rw   r   r   )r   r   r   r#   rw   r   r   r   r      s   


zSFNTWriter.__new__r   Nc                 C   s   || _ || _t|| _|| _|| _| jdkr*t| _t| _	t
| _d| _t|t  | _n$| jr4J d| j t| _t| _	t| _ddlm} ||d\| _| _| _| j  | _| j| j	 || jj  | _| j | j | j d| j| j     t | _d S )Nr   ZwOFFUnknown flavor '%s'r   getSearchRange       )r!   r2   r   r   r#   r$   r0   directoryFormatr/   directorySizer.   r&   	signaturer*   sfntDirectoryEntrySizeorigNextTableOffsetr-   r%   fontTools.ttLibrz   searchRangeentrySelector
rangeShiftrX   directoryOffset
formatSizenextTableOffsetr   writer   r7   )r9   r!   r2   r   r#   r$   rz   r   r   r   r=      s,   

zSFNTWriter.__init__c                 C   s$   || j v rtd| || j |< d S )Ncannot rewrite '%s' table)r7   r   )r9   r4   r<   r   r   r   setEntry   s   
zSFNTWriter.setEntryc                 C   s   || j v rtd| |  }||_| j|_|dkr2t|dd d |dd  |_|| _d|_	nt||_|
| j| | jdkrS| j|_|  j|jd	 d
@ 7  _| j|jd	 d
@  | _| jd| j| j    | j| j ksvJ | || dS )zWrite raw table data to disk.r   rE   NrF   rG   rH   Tr   rf   r|   )r7   r   r&   r4   r   r   rJ   rK   	headTableuncompressedsaveDatar!   r#   r   
origOffset
origLengthlengthr   rX   r   )r9   r4   r;   r<   r   r   r   __setitem__   s$   
"

zSFNTWriter.__setitem__c                 C   s
   | j | S r>   r?   r@   r   r   r   rN     rB   zSFNTWriter.__getitem__c           
      C   sz  t | j }t|| jkrtd| jt|f | jdkrd| _d| _d| _	|  j	dt| 7  _	|D ]\}}|  j	|j
d d@ 7  _	q4| jrK| jnt }|jd	ura|jd	ura|j| _|j| _nt| d
rvtd| jdd \| _| _nd | _| _|jrt|j| _| jdd | j | _t|j}t|| _| j| n	d | _ | _| _|jr| jdd | j }|d d@ }| jd||   | j | _t|j| _| j|j nd | _| _| jdd | j | _n| jrJ d| j 	 t !| j"| }| j| j#| j$  d}	|D ]\}}|dkrd}	||%  }q|	r.| &| | j| j# | j| d	S )zHAll tables must have been written to disk. Now write the
		directory.
		z-wrong number of tables; expected %d, found %dr   r   r   rH   r{   rf   r   Nr   z>HHr	   rF   rm    rx   rE   r   )'r5   r7   r6   r+   r2   r   r#   r   ZreservedZtotalSfntSizer   r$   r8   majorVersionminorVersionhasattrstructr,   r   metaDatametaOrigLengthr!   r   rX   
metaOffsetrp   
metaLengthr   privData
privOffset
privLengthr   r   packr}   r   r~   toStringwriteMasterChecksum)
r9   r7   r4   r<   r;   ZcompressedMetaDataZoffZ	paddedOff	directoryZseenHeadr   r   r   rP     sb   


 




zSFNTWriter.closec                 C   s  t | j }g }tt|D ]}|| j||  j q| jtkraddl	m
} || jd\| _| _| _tt| }t| j }|D ]\}}t }	|j|	_|j|	_|j|	_|j|	_||	  }qCtt| jt  }
|
t|ksrJ |t| t|d@ }d| d@ }|S )Nr   ry   r{       l   /ac )listr7   rC   r1   r+   appendrK   r&   r%   r   rz   r2   r   r   r   r   r   r-   r5   r6   r4   r   r   r   r   r   r*   r   rJ   sum)r9   r   ZtagsZ	checksumsr   rz   r7   r4   r<   Z	sfntEntryZdirectory_endrM   checksumadjustmentr   r   r   _calcMasterChecksum^  s,   
zSFNTWriter._calcMasterChecksumc                 C   s:   |  |}| j| jd jd  | jtd| d S )NrE   rF   z>L)r   r!   r   r7   r   r   r   r   )r9   r   r   r   r   r   r   |  s   
zSFNTWriter.writeMasterChecksumc                 C   s   dS NFr   rD   r   r   r   reordersTables     zSFNTWriter.reordersTables)r   NN)ra   rb   rc   r   r=   r   r   rN   rP   r   r   r   r   r   r   r   rv      s    
"Brv   a  
		> # big endian
		TTCTag:                  4s # "ttcf"
		Version:                 L  # 0x00010000 or 0x00020000
		numFonts:                L  # number of fonts
		# OffsetTable[numFonts]: L  # array with offsets from beginning of file
		# ulDsigTag:             L  # version 2.0 only
		# ulDsigLength:          L  # version 2.0 only
		# ulDsigOffset:          L  # version 2.0 only
z
		> # big endian
		sfntVersion:    4s
		numTables:      H    # number of tables
		searchRange:    H    # (max2 <= numTables)*16
		entrySelector:  H    # log2(max2 <= numTables)
		rangeShift:     H    # numTables*16-searchRange
zc
		> # big endian
		tag:            4s
		checkSum:       L
		offset:         L
		length:         L
ab  
		> # big endian
		signature:      4s   # "wOFF"
		sfntVersion:    4s
		length:         L    # total woff file size
		numTables:      H    # number of tables
		reserved:       H    # set to 0
		totalSfntSize:  L    # uncompressed size
		majorVersion:   H    # major version of WOFF file
		minorVersion:   H    # minor version of WOFF file
		metaOffset:     L    # offset to metadata block
		metaLength:     L    # length of compressed metadata
		metaOrigLength: L    # length of uncompressed metadata
		privOffset:     L    # offset to private data block
		privLength:     L    # length of private data block
z
		> # big endian
		tag:            4s
		offset:         L
		length:         L    # compressed length
		origLength:     L    # original length
		checkSum:       L    # original checksum
c                   @   sT   e Zd Zdd Zdd Zdd Zdd Zd	d
 Zdd Zdd Z	dd Z
dd ZdS )r&   c                 C   s
   d| _ d S r   )r   rD   r   r   r   r=     rB   zDirectoryEntry.__init__c                 C   s   t | j|| j|  d S r>   )r   r,   formatr   r   )r9   r!   r   r   r   r3     s   zDirectoryEntry.fromFilec                 C   s   t | j||  d S r>   )r   r,   r   )r9   strr   r   r   
fromString  s   zDirectoryEntry.fromStringc                 C   s   t | j| S r>   )r   r   r   rD   r   r   r   r     rQ   zDirectoryEntry.toStringc                 C   s6   t | drd| jj| jt| f S d| jjt| f S )Nr4   z<%s '%s' at %x>z
<%s at %x>)r   	__class__ra   r4   idrD   r   r   r   __repr__  s   
zDirectoryEntry.__repr__c                 C   sD   | | j || j}t|| jksJ t| jdr | |}|S )N
decodeData)r   r   r   r   r+   r   r   r   r9   r!   r;   r   r   r   rI     s   
zDirectoryEntry.loadDatac                 C   s:   t | jdr| |}t|| _|| j || d S )N
encodeData)r   r   r   r+   r   r   r   r   r   r   r   r   r     s
   

zDirectoryEntry.saveDatac                 C      |S r>   r   )r9   rawDatar   r   r   r     r   zDirectoryEntry.decodeDatac                 C   r   r>   r   )r9   r;   r   r   r   r     r   zDirectoryEntry.encodeDataN)ra   rb   rc   r=   r3   r   r   r   rI   r   r   r   r   r   r   r   r&     s    r&   c                   @   s   e Zd ZeZeZdS )r%   N)ra   rb   rc   sfntDirectoryEntryFormatr   r   r   r   r   r   r   r%     s    r%   c                       s4   e Zd ZeZeZ fddZdd Zdd Z	  Z
S )r.   c                    s&   t t|   ttdst| _d S d S )NzlibCompressionLevel)superr.   r=   r   ZLIB_COMPRESSION_LEVELr   rD   r   r   r   r=     s   

zWOFFDirectoryEntry.__init__c                 C   sL   dd l }| j| jkr|}|S | j| jk sJ ||}t|| jks$J |S Nr   )rs   r   r   
decompressr+   )r9   r   rs   r;   r   r   r   r     s   
zWOFFDirectoryEntry.decodeDatac                 C   sR   t || _| jst|| j}| jst || jkr |}| j| _|S |}t || _|S r>   )r+   r   r   rp   r   r   )r9   r;   ZcompressedDatar   r   r   r   r     s   

zWOFFDirectoryEntry.encodeData)ra   rb   rc   woffDirectoryEntryFormatr   woffDirectoryEntrySizer   r=   r   r   __classcell__r   r   r   r   r.     s    
r.   c                   @   s"   e Zd ZdZdddZdd ZdS )r8   r   Nc                 C   s   d | _ d | _d | _d | _|r`|j | _ |j| _|jrA|j|j |j|j}t	||jks0J | 
|}t	||jks>J || _|jrb|j|j |j|j}t	||jks[J || _d S d S d S r>   )r   r   r   r   r   r!   r   r   r   r+   _decompressr   r   r   )r9   readerr   r;   r   r   r   r=   "  s*   


zWOFFFlavorData.__init__c                 C   s   dd l }||S r   )rs   r   )r9   r   rs   r   r   r   r   7  s   
zWOFFFlavorData._decompressr>   )ra   rb   rc   ZFlavorr=   r   r   r   r   r   r8     s    
r8   c                 C   s   t | d }|r| dd|  7 } d}d}|d dksJ tdt | |D ]}| |||  }tdt |d  |}|t| d@ }q$|S )zCalculate the checksum for an arbitrary block of data.

	If the data length is not a multiple of four, it assumes
	it is to be padded with null byte.

		>>> print(calcChecksum(b"abcd"))
		1633837924
		>>> print(calcChecksum(b"abcdxyz"))
		3655064932
	r	   r|   r   i   >%dLr   )r+   r1   r   r,   r   )r;   Z	remaindervalueZ	blockSizer   blockZlongsr   r   r   rJ   <  s   rJ   c                 C   s   |  d | t}t|tkrtdt }tt|| |j	dkr'td|j
dks8|j
dks8J d|j
 td|j | |jd	 |_|j
dkrN	 |S )
Nr   r   ttcfzNot a Font Collection   i   zunrecognized TTC version 0x%08xr   r	   )r   r   ttcHeaderSizer+   r   r   r   r,   ttcHeaderFormatTTCTagVersionr   r(   r)   )r!   r;   r9   r   r   r   r'   S  s   


" 
r'   c                 C   sf   t  }d|_d|_||_| d | tt| | 	 }| t
jd|j gdg|j R   |S )Nr   r   r   r   )r   r   r   r(   r   r   r   r   r   rX   r   )r!   r(   r9   r   r   r   r   writeTTCHeaderb  s   
&r   __main__)0__doc__ior   typesr   ZfontTools.misc.textToolsr   ZfontTools.miscr   r   r   r   collectionsr   ZloggingZ	getLoggerra   rL   r   r   r   rr   rt   rp   rv   r   Zcalcsizer   r-   r*   r   r   r0   r/   r   r   r&   r%   r.   r8   rJ   r'   r   sysZdoctestexitZtestmodZfailedr   r   r   r   <module>   s`    
} I

	


	)'