o iY @sdZddlmZddlmZddlmZddlmZddl m Z m Z ddl Z ddl mZddlZeeZGd d d eZd Zd Zd ddddddddd ZefddZGdddeZdZeeZdZeeZdZeeZ dZ!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.krddl,Z,ddl-Z-e,.e-/j0dSdS)/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) TTLibErrorTTLibFileIsCollectionErrorN) OrderedDictc@sZeZdZddZdddZddZeZd d Zd d Zd dZ ddZ ddZ ddZ dS) SFNTReadercOs^|r*|tur*|d}|dt|d}|d|dkr*ddlm}t|St|S)zmReturn an instance of the SFNTReader sub-class which is compatible with the input file type. rZwOF2) WOFF2Reader)r seekrreadfontTools.ttLib.woff2r object__new__)clsargskwargsinfile sfntVersionr rc/var/www/html/eduruby.in/lip-sync/lip-sync-env/lib/python3.10/site-packages/fontTools/ttLib/sfnt.pyrs      zSFNTReader.__new__rc Cs||_||_d|_d|_t|_|jd|jd|_|jd|jdkrft |j}|j }d|kr9|ksBnt d|d||_ |j|j ||jt }t|t kr^tdtt||n:|jdkrd|_t|_|jt}t|tkrtd tt||n|jt }t|t krtd tt||t|j|_|jd vrtd i}t|jD]}|} | |jt| j} | || <qtt|d dd|_|jdkrt||_dSdS)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)irrr]s z%SFNTReader.__init__..)key) filecheckChecksumsflavor flavorDataSFNTDirectoryEntryDirectoryEntryr r r readTTCHeadernumFontsr offsetTablesfntDirectorySizelenrrunpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatrrange numTablesfromFiletagrsorteditemstablesWOFFFlavorData) selfr#r$Z fontNumberheaderr*datar9r entryr6rrr__init__/s^                 zSFNTReader.__init__cCs ||jvSNr9r;r6rrrhas_keyc zSFNTReader.has_keycCs |jSr@)r9keysr;rrrrEhrDzSFNTReader.keyscCs|jt|}||j}|jrF|dkr%t|ddd|dd}nt|}|jdkr;||jks9Jd||S||jkrFtd||S)zFetch the raw table data.headN rzbad checksum for '%s' table) r9rloadDatar#r$ calcChecksumcheckSumlogwarning)r;r6r>r=checksumrrr __getitem__ks "  zSFNTReader.__getitem__cCs|jt|=dSr@)r9rrBrrr __delitem__}szSFNTReader.__delitem__cCs|jdSr@)r#closerFrrrrSzSFNTReader.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|vrt|dd|_|j|d|j|dS)Nr#rUrbrV)openpopr#r rXupdater\rrr __setstate__szSFNTReader.__setstate__N)rr) __name__ __module__ __qualname__rr?rC __contains__rErQrRrSr^rcrrrrr s 4 r FrrH 2d) rrir rjrhrH cCs`d|kr dksntd|tr|dkr"ddlm}|||Sddlm}||t|dS)aECompress '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). rrrzBad compression level: %s)compress)Z numiterations) ValueError USE_ZOPFLIzlibrsZ zopfli.zlib ZOPFLI_LEVELS)r=levelrsrrrrss     rsc@s\eZdZddZ   dddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|r d|vr |d}n |rt|dkr|d}|tur,|dkr,ddlm}t|St|S)zpReturn an instance of the SFNTWriter sub-class which is compatible with the specified 'flavor'. Nr%riZwoff2r) WOFF2Writer)r-ryrrzrr)rrrr%rzrrrrs     zSFNTWriter.__new__rNcCs||_||_t||_||_||_|jdkr*t|_t|_ t |_ d|_ t |t|_n$|jr4Jd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrZwOFFUnknown flavor '%s'rgetSearchRange)r#r4rrr%r&r2directoryFormatr1 directorySizer0r( signaturer,sfntDirectoryEntrySizeorigNextTableOffsetr/r'fontTools.ttLibr} searchRange entrySelector rangeShiftr[directoryOffset formatSizenextTableOffsetr writerr9)r;r#r4rr%r&r}rrrr?s<       zSFNTWriter.__init__cCs$||jvr td|||j|<dS)Ncannot rewrite '%s' table)r9r)r;r6r>rrrsetEntry s  zSFNTWriter.setEntrycCs||jvr td||}||_|j|_|dkr2t|ddd|dd|_||_d|_ nt||_| |j ||j dkrS|j |_|j |jd d @7_ |j|jd d @|_|j d |j|j |j|j ksvJ|||dS) zWrite raw table data to disk.rrGNrHrIrJTrrir)r9rr(r6rrrLrM headTable uncompressedsaveDatar#r%r origOffset origLengthlengthrr[r)r;r6r=r>rrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|Sr@rArBrrrrQ.rDzSFNTWriter.__getitem__c Cszt|j}t||jkrtd|jt|f|jdkrd|_d|_d|_ |j dt|7_ |D]\}}|j |j dd@7_ q4|j rK|j nt }|j d ura|jd ura|j |_ |j|_nt|d rvtd |jd d \|_ |_nd|_ |_|jrt|j|_|jdd|j|_t|j}t||_|j|n d|_|_|_|jr|jdd|j}|dd@}|jd|||j|_t|j|_|j|jnd|_|_|jdd|j|_n |jrJd|j t !|j"|}|j|j#|j$d} |D]\}}|dkrd} ||%}q| r.|&||j|j#|j|d S)zTAll tables must have been written to disk. Now write the directory. z-wrong number of tables; expected %d, found %drrrrJr~rirNrz>HHr rHrprr{rGr)'r7r9r8r-r4rr%rreservedZ totalSfntSizerr&r: majorVersion minorVersionhasattrstructr.rmetaDatametaOrigLengthr#r r[ metaOffsetrs metaLengthrprivData privOffset privLengthrrpackrrrtoStringwriteMasterChecksum) r;r9r6r>r=ZcompressedMetaDataoffZ paddedOff directoryZseenHeadrrrrS1sn                  zSFNTWriter.closec Csg}|jD] }||j|jq|jtkrWddlm}||jd\|_ |_ |_ t t|}t|j}|D]\}}t}|j|_|j|_|j|_|j|_||}q9tt|jt}|t|kshJ|t|t|d@} d| d@} | S)Nrr|r~l/ac)r9rEappendrMr(r'rr}r4rrrrrr/r7r8r6rrrrrr,r-rrLsum) r;rZ checksumsr6r}r9r>Z sfntEntryZ directory_endrPchecksumadjustmentrrr_calcMasterChecksumxs.      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrGrHz>L)rr#r r9rrrr)r;rrrrrrs zSFNTWriter.writeMasterChecksumcCsdSNFrrFrrrreordersTableszSFNTWriter.reordersTables)rNN) rdrerfrr?rrrQrSrrrrrrrrys 1G rya > # 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)rrFrrrr?rDzDirectoryEntry.__init__cCst|j||j|dSr@)rr.formatr r)r;r#rrrr5szDirectoryEntry.fromFilecCst|j||dSr@)rr.r)r;strrrr fromStringszDirectoryEntry.fromStringcCst|j|Sr@)rrrrFrrrrrTzDirectoryEntry.toStringcCs6t|drd|jj|jt|fSd|jjt|fS)Nr6z<%s '%s' at %x>z <%s at %x>)r __class__rdr6idrFrrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jksJt|jdr ||}|S)N decodeData)r rr rr-rrrr;r#r=rrrrKs    zDirectoryEntry.loadDatacCs:t|jdr ||}t||_||j||dS)N encodeData)rrrr-rr rrrrrrrs    zDirectoryEntry.saveDatacC|Sr@r)r;rawDatarrrrrzDirectoryEntry.decodeDatacCrr@r)r;r=rrrr rzDirectoryEntry.encodeDataN) rdrerfr?r5rrrrKrrrrrrrr(s r(c@seZdZeZeZdS)r'N)rdrerfsfntDirectoryEntryFormatrrrrrrrr'sr'cs4eZdZeZeZfddZddZddZ Z S)r0cs&tt|ttdst|_dSdS)NzlibCompressionLevel)superr0r?rZLIB_COMPRESSION_LEVELrrFrrrr?s  zWOFFDirectoryEntry.__init__cCsLddl}|j|jkr|}|S|j|jksJ||}t||jks$J|SNr)rvrr decompressr-)r;rrvr=rrrr"s  zWOFFDirectoryEntry.decodeDatacCsRt||_|jst||j}|jst||jkr |}|j|_|S|}t||_|Sr@)r-rrrsrr)r;r=ZcompressedDatarrrrr-s   zWOFFDirectoryEntry.encodeData) rdrerfwoffDirectoryEntryFormatrwoffDirectoryEntrySizerr?rr __classcell__rrrrr0s    r0c@s"eZdZdZdddZddZdS)r:rNcCsd|_d|_d|_d|_|r`|j|_|j|_|jrA|j|j|j|j}t ||jks0J| |}t ||j ks>J||_|j rb|j|j |j|j }t ||j ks[J||_dSdSdSr@)rrrrrr#r rr r- _decompressrrr)r;readerrr=rrrr?>s*   zWOFFFlavorData.__init__cCsddl}||Sr)rvr)r;rrvrrrrSs zWOFFFlavorData._decompressr@)rdrerfZFlavorr?rrrrrr:;s  r:cCst|d}|r|dd|7}d}d}|ddksJtdt||D]}||||}tdt|d|}|t|d@}q$|S)a,Calculate 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 rri>%dLr)r-r3rr.r)r= remaindervalueZ blockSizer blockZlongsrrrrLYs rLcCs|d|t}t|tkrtdt}tt|||j dkr'td|j dks8|j dks8Jd|j t d|j ||j d |_ |j dkrN |S) NrrttcfzNot a Font Collectionizunrecognized TTC version 0x%08xrr )r r ttcHeaderSizer-rrrr.ttcHeaderFormatTTCTagVersionrr*r+)r#r=r;rrrr)qs"     r)cCsft}d|_d|_||_|d|tt|| }|t jd|jgdg|jR|S)Nrrrr) rrrr*r rrrrr[r)r#r*r;rrrrwriteTTCHeaders &r__main__)1__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrrrr collectionsrlogging getLoggerrdrNrr rrurwrsryrcalcsizerr/r,rrr2r1rrr(r'r0r:rLr)rsysdoctestexittestmodfailedrrrrsb       _     )(