U 6cK @s|dZddlmZddlmZddlmZddlmZddl m Z ddl Z ddl m Z ddlZeeZGd d d eZd Zd Zd ddddddddd ZefddZGdddeZdZeeZdZeeZdZeeZdZ ee Z!dZ"ee"Z#Gd d!d!eZ$Gd"d#d#e$Z%Gd$d%d%e$Z&Gd&d'd'Z'd(d)Z(d*d+Z)d,d-Z*ed.krxddl+Z+ddl,Z,e+-e,.j/dS)/attLib/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@sZeZdZddZdddZddZeZd d Zd d Zd dZ ddZ ddZ ddZ dS) SFNTReadercOs^|rT|tkrT|d}|dt|d}|d|dkrTddlm}t|St|S)zb Return an instance of the SFNTReader sub-class which is compatible with the input file type. rZwOF2) WOFF2Reader)rseekrreadfontTools.ttLib.woff2r object__new__)clsargskwargsinfile sfntVersionr r8/tmp/pip-unpacked-wheel-n2hbwplv/fontTools/ttLib/sfnt.pyrs     zSFNTReader.__new__rc Cs||_||_d|_d|_t|_|jd|jd|_|jd|jdkrt |j}|j }d|krr|ksnt d|d||_ |j|j ||jt }t|t krt dtt||nz|jdkrd|_t|_|jt}t|tkrt d tt||n0|jt }t|t kr8t d tt||t|j|_|jd krft d i}t|jD],}|} | |jt| j} | || <qttt|d dd|_|jdkrt||_dS)Nrr sttcfz2specify a font number between 0 and %d (inclusive)'Not a Font Collection (not enough data)wOFFwoffz!Not a WOFF font (not enough data)z1Not a TrueType or OpenType font (not enough data))ZOTTOtruez1Not a TrueType or OpenType font (bad sfntVersion)cSs |djS)Nr)offset)irrrYz%SFNTReader.__init__..)key)filecheckChecksumsflavor flavorDataSFNTDirectoryEntryDirectoryEntryr r r readTTCHeadernumFontsr offsetTablesfntDirectorySizelenrunpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatrrange numTablesfromFiletagrsorteditemstablesWOFFFlavorData) selfr#r$Z fontNumberheaderr*datar9rentryr6rrr__init__.sT               zSFNTReader.__init__cCs ||jkSNr9r;r6rrrhas_key_szSFNTReader.has_keycCs |jSr@)r9keysr;rrrrDdszSFNTReader.keyscCs|jt|}||j}|jr|dkrJt|ddd|dd}nt|}|jdkrt||jkstd|n||jkrt d||S)zFetch the raw table data.headN rzbad checksum for '%s' table) r9rloadDatar#r$ calcChecksumcheckSumAssertionErrorlogwarning)r;r6r>r=checksumrrr __getitem__gs "   zSFNTReader.__getitem__cCs|jt|=dSr@)r9rrBrrr __delitem__yszSFNTReader.__delitem__cCs|jdSr@)r#closerErrrrS|szSFNTReader.closecCs@t|jtr|jS|j}|d=|jj|d<|j|d<|S)Nr# _filename_filepos) isinstancer#r__dict__copynametellr;staterrr __getstate__s   zSFNTReader.__getstate__cCs<d|kr,t|dd|_|j|d|j|dS)Nr#rTrbrU)openpopr#r rWupdater[rrr __setstate__szSFNTReader.__setstate__N)rr) __name__ __module__ __qualname__rr?rC __contains__rDrQrRrSr]rbrrrrrs 1  rFrrG 2d) rrhr rirgrG cCsdd|krdks"ntd|tr.|dkrDddlm}|||Sddlm}||t|dSdS)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). rrqzBad compression level: %s)compress)Z numiterationsN) ValueError USE_ZOPFLIzlibrrZ zopfli.zlib ZOPFLI_LEVELS)r=levelrrrrrrrs     rrc@sVeZdZddZdddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|rd|kr|d}n|r2t|dkr2|d}|tkrX|dkrXddlm}t|St|S)ze Return an instance of the SFNTWriter sub-class which is compatible with the specified 'flavor'. Nr%rhZwoff2r) WOFF2Writer)r-rxr ryrr)rrrr%ryrrrrs    zSFNTWriter.__new__rNcCs||_||_t||_||_||_|jdkrTt|_t|_ t |_ d|_ t |t|_nH|jrhtd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrZwOFFUnknown flavor '%s'rgetSearchRange) r#r4rrr%r&r2directoryFormatr1 directorySizer0r( signaturer,sfntDirectoryEntrySizeorigNextTableOffsetrMr/r'fontTools.ttLibr| searchRange entrySelector rangeShiftrZdirectoryOffset formatSizenextTableOffsetr writerr9)r;r#r4rr%r&r|rrrr?s,    zSFNTWriter.__init__cCs$||jkrtd|||j|<dS)Ncannot rewrite '%s' table)r9r)r;r6r>rrrsetEntrys  zSFNTWriter.setEntrycCs||jkrtd||}||_|j|_|dkrdt|ddd|dd|_||_d|_ n t||_| |j ||j dkr|j |_|j |jd d @7_ |j|jd d @|_|j d |j|j |j|j kst|||dS) zWrite raw table data to disk.rrFNrGrHrITrrhr~)r9rr(r6rrrKrL headTable uncompressedsaveDatar#r%r origOffset origLengthlengthrrZrMr)r;r6r=r>rrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|Sr@rArBrrrrQszSFNTWriter.__getitem__c Cst|j}t||jkr2td|jt|f|jdkrd|_d|_d|_ |j dt|7_ |D] \}}|j |j dd@7_ qj|j r|j nt }|j d k r|jd k r|j |_ |j|_n6t|d rtd |jd d \|_ |_n d|_ |_|jrJt|j|_|jdd|j|_t|j}t||_|j|nd|_|_|_|jr|jdd|j}|dd@}|jd|||j|_t|j|_|j|jn d|_|_|jdd|j|_n|jrt d|jt!"|j#|}|j|j$|j%d} |D]$\}}|dkrBd} ||&}q,| rb|'||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 %drrrrIr}rhrNrz>HHr rGrorzrFr)(r7r9r8r-r4rr%rreservedZ totalSfntSizerr&r: majorVersion minorVersionhasattrstructr.rmetaDatametaOrigLengthr#r rZ metaOffsetrr metaLengthrprivData privOffset privLengthrrMrpackrrrtoStringwriteMasterChecksum) r;r9r6r>r=ZcompressedMetaDataoffZ paddedOff directoryZseenHeadrrrrSs`                  zSFNTWriter.closec Cst|j}g}tt|D]}||j||jq|jtkrddl m }||j d\|_ |_ |_tt|}t|j}|D]:\}}t} |j| _|j| _|j| _|j| _|| }qtt|jt} | t|kst|t|t|d@} d| d@} | S)Nrr{r}l/ac)listr9rDr3r-appendrLr(r'rr|r4rrrrrr/r7r8r6rrrrrr,rrMrKsum) r;rtagsZ checksumsrr|r9r6r>Z sfntEntryZ directory_endrPchecksumadjustmentrrr_calcMasterChecksum^s,      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrFrGz>L)rr#r r9rrrr)r;rrrrrr|s zSFNTWriter.writeMasterChecksumcCsdSNFrrErrrreordersTablesszSFNTWriter.reordersTables)rNN) rcrdrerr?rrrQrSrrrrrrrrxs "Brxa > # 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@sTeZdZddZddZddZddZd d Zd d Zd dZ ddZ ddZ dS)r(cCs d|_dSr)rrErrrr?szDirectoryEntry.__init__cCst|j||j|dSr@)rr.formatr r)r;r#rrrr5szDirectoryEntry.fromFilecCst|j||dSr@)rr.r)r;strrrr fromStringszDirectoryEntry.fromStringcCst|j|Sr@)rrrrErrrrszDirectoryEntry.toStringcCs:t|dr"d|jj|jt|fSd|jjt|fSdS)Nr6z<%s '%s' at %x>z <%s at %x>)r __class__rcr6idrErrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jks*tt|jdr@||}|S)N decodeData) r rr rr-rMrrrr;r#r=rrrrJs     zDirectoryEntry.loadDatacCs:t|jdr||}t||_||j||dS)N encodeData)rrrr-rr rrrrrrrs     zDirectoryEntry.saveDatacCs|Sr@r)r;rawDatarrrrszDirectoryEntry.decodeDatacCs|Sr@r)r;r=rrrrszDirectoryEntry.encodeDataN) rcrdrer?r5rrrrJrrrrrrrr(sr(c@seZdZeZeZdS)r'N)rcrdresfntDirectoryEntryFormatrrrrrrrr'sr'cs4eZdZeZeZfddZddZddZ Z S)r0cs"tt|ttdst|_dS)NzlibCompressionLevel)superr0r?rZLIB_COMPRESSION_LEVELrrErrrr?s zWOFFDirectoryEntry.__init__cCsJddl}|j|jkr|}n,|j|jks*t||}t||jksFt|SNr)rurrrM decompressr-)r;rrur=rrrrs  zWOFFDirectoryEntry.decodeDatacCsPt||_|jst||j}|js0t||jkr>|}|j|_n|}t||_|Sr@)r-rrrrrr)r;r=ZcompressedDatarrrrrs    zWOFFDirectoryEntry.encodeData) rcrdrewoffDirectoryEntryFormatrwoffDirectoryEntrySizerr?rr __classcell__rrrrr0s   r0c@s"eZdZdZdddZddZdS)r:rNcCsd|_d|_d|_d|_|r|j|_|j|_|jr|j|j|j|j}t ||jks`t | |}t ||j ks|t ||_|j r|j|j|j|j }t ||j kst ||_dSr@)rrrrrr#r rr r-rM _decompressrrr)r;readerrr=rrrr?"s& zWOFFFlavorData.__init__cCsddl}||Sr)rur)r;rrurrrr7szWOFFFlavorData._decompress)N)rcrdreZFlavorr?rrrrrr:s r:cCst|d}|r |dd|7}d}d}|ddks8ttdt||D]<}||||}tdt|d|}|t|d@}qH|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~ri>%dLr)r-rMr3rr.r)r= remaindervalueZ blockSizerblockZlongsrrrrK<s rKcCs|d|t}t|tkr(tdt}tt|||j dkrNtd|j dksp|j dkspt d|j t d|j ||j d |_|j dkr|S) NrrttcfzNot a Font Collectionizunrecognized TTC version 0x%08xrr )r r ttcHeaderSizer-rrrr.ttcHeaderFormatTTCTagVersionrMrr*r+)r#r=r;rrrr)Ss    "  r)cCsdt}d|_d|_||_|d|tt|| }|t jd|jfdg|j|S)Nrrrr) rrrr*r rrrrrZr)r#r*r;rrrrwriteTTCHeaderbs $r__main__)0__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrrr collectionsrlogging getLoggerrcrNrrrrtrvrrrxrcalcsizerr/r,rrr2r1rrr(r'r0r:rKr)rsysdoctestexittestmodfailedrrrrs\       } I     )'