U md0Y @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.kr|ddl,Z,ddl-Z-e,.e-/j0dS)/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^|rT|tkrT|d}|dt|d}|d|dkrTddlm}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 rM/home/sam/Atlas/atlas_env/lib/python3.8/site-packages/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 krtdtt||nz|jdkrd|_t|_|jt}t|tkrtd tt||n0|jt }t|t kr8td tt||t|j|_|jd krftd 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)irrr\z%SFNTReader.__init__..)key) filecheckChecksumsflavor flavorDataSFNTDirectoryEntryDirectoryEntryr r r readTTCHeadernumFontsr offsetTablesfntDirectorySizelenrrunpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatrrange numTablesfromFiletagrsorteditemstablesWOFFFlavorData) selfr$r%Z fontNumberheaderr+datar:r entryr7rrr__init__.s\               zSFNTReader.__init__cCs ||jkSNr:r<r7rrrhas_keybszSFNTReader.has_keycCs |jSrA)r:keysr<rrrrEgszSFNTReader.keyscCs|jt|}||j}|jr|dkrJt|ddd|dd}nt|}|jdkrt||jkstd|n||jkrt d||S)zFetch the raw table data.headN rzbad checksum for '%s' table) r:rloadDatar$r% calcChecksumcheckSumAssertionErrorlogwarning)r<r7r?r>checksumrrr __getitem__js "   zSFNTReader.__getitem__cCs|jt|=dSrA)r:rrCrrr __delitem__|szSFNTReader.__delitem__cCs|jdSrA)r$closerFrrrrTszSFNTReader.closecCs@t|jtr|jS|j}|d=|jj|d<|j|d<|S)Nr$ _filename_filepos) isinstancer$r__dict__copynametellr<staterrr __getstate__s   zSFNTReader.__getstate__cCs<d|kr,t|dd|_|j|d|j|dS)Nr$rUrbrV)openpopr$r rXupdater\rrr __setstate__szSFNTReader.__setstate__N)rr) __name__ __module__ __qualname__rr@rD __contains__rErRrSrTr^rcrrrrr s 4  r FrrH 2d) rrir rjrhrH cCsdd|krdks"ntd|tr.|dkrDddlm}|||Sddlm}||t|dSdS)aECompress 'data' to Zlib format. If 'USE_ZOPFLI' variable is True, zopfli is used instead of the zlib module. The compression 'level' must be between 0 and 9. 1 gives best speed, 9 gives best compression (0 gives no compression at all). The default value is a compromise between speed and compression (6). rrrzBad compression level: %s)compress)Z numiterationsN) ValueError USE_ZOPFLIzlibrsZ zopfli.zlib ZOPFLI_LEVELS)r>levelrsrrrrss     rsc@sVeZdZddZdddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|rd|kr|d}n|r2t|dkr2|d}|tkrX|dkrXddlm}t|St|S)zpReturn an instance of the SFNTWriter sub-class which is compatible with the specified 'flavor'. Nr&riZwoff2r) WOFF2Writer)r.ryrrzrr)rrrr&rzrrrrs    zSFNTWriter.__new__rNcCs||_||_t||_||_||_|jdkrTt|_t|_ t |_ d|_ t |t|_nH|jrhtd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrZwOFFUnknown flavor '%s'rgetSearchRange) r$r5rrr&r'r3directoryFormatr2 directorySizer1r) signaturer-sfntDirectoryEntrySizeorigNextTableOffsetrNr0r(fontTools.ttLibr} searchRange entrySelector rangeShiftr[directoryOffset formatSizenextTableOffsetr writerr:)r<r$r5rr&r'r}rrrr@s>      zSFNTWriter.__init__cCs$||jkrtd|||j|<dS)Ncannot rewrite '%s' table)r:r)r<r7r?rrrsetEntry s  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.rrGNrHrIrJTrrir)r:rr)r7rrrLrM headTable uncompressedsaveDatar$r&r origOffset origLengthlengthrr[rNr)r<r7r>r?rrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|SrArBrCrrrrR-szSFNTWriter.__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$|j|d S)zTAll tables must have been written to disk. Now write the directory. z-wrong number of tables; expected %d, found %drrrrJr~rirNrz>HHr rHrprr{rGr)(r8r:r9r.r5rr&rreservedZ totalSfntSizerr'r; majorVersion minorVersionhasattrstructr/rmetaDatametaOrigLengthr$r r[ metaOffsetrs metaLengthrprivData privOffset privLengthrrNrpackrrrtoStringwriteMasterChecksum) r<r:r7r?r>ZcompressedMetaDataoffZ paddedOff directoryZseenHeadrrrrT0sn                   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)listr:rEr4r.appendrMr)r(rr}r5rrrrrr0r8r9r7rrrrrr-rrNrLsum) r<rtagsZ checksumsr r}r:r7r?Z sfntEntryZ directory_endrQchecksumadjustmentrrr_calcMasterChecksumws2      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrGrHz>L)rr$r r:rrrr)r<rrrrrrs zSFNTWriter.writeMasterChecksumcCsdSNFrrFrrrreordersTablesszSFNTWriter.reordersTables)rNN) rdrerfrr@rrrRrTrrrrrrrrys 1G!rya > # big endian TTCTag: 4s # "ttcf" Version: L # 0x00010000 or 0x00020000 numFonts: L # number of fonts # OffsetTable[numFonts]: L # array with offsets from beginning of file # ulDsigTag: L # version 2.0 only # ulDsigLength: L # version 2.0 only # ulDsigOffset: L # version 2.0 only z > # big endian sfntVersion: 4s numTables: H # number of tables searchRange: H # (max2 <= numTables)*16 entrySelector: H # log2(max2 <= numTables) rangeShift: H # numTables*16-searchRange zc > # big endian tag: 4s checkSum: L offset: L length: L ab > # big endian signature: 4s # "wOFF" sfntVersion: 4s length: L # total woff file size numTables: H # number of tables reserved: H # set to 0 totalSfntSize: L # uncompressed size majorVersion: H # major version of WOFF file minorVersion: H # minor version of WOFF file metaOffset: L # offset to metadata block metaLength: L # length of compressed metadata metaOrigLength: L # length of uncompressed metadata privOffset: L # offset to private data block privLength: L # length of private data block z > # big endian tag: 4s offset: L length: L # compressed length origLength: L # original length checkSum: L # original checksum c@sTeZdZddZddZddZddZd d Zd d Zd dZ ddZ ddZ dS)r)cCs d|_dSr)rrFrrrr@szDirectoryEntry.__init__cCst|j||j|dSrA)rr/formatr r)r<r$rrrr6szDirectoryEntry.fromFilecCst|j||dSrA)rr/r)r<strrrr fromStringszDirectoryEntry.fromStringcCst|j|SrA)rrrrFrrrrszDirectoryEntry.toStringcCs:t|dr"d|jj|jt|fSd|jjt|fSdS)Nr7z<%s '%s' at %x>z <%s at %x>)r __class__rdr7idrFrrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jks*tt|jdr@||}|S)N decodeData) r rr rr.rNrrrr<r$r>rrrrKs     zDirectoryEntry.loadDatacCs:t|jdr||}t||_||j||dS)N encodeData)rrrr.rr rrrrrrrs     zDirectoryEntry.saveDatacCs|SrAr)r<rawDatarrrrszDirectoryEntry.decodeDatacCs|SrAr)r<r>rrrr szDirectoryEntry.encodeDataN) rdrerfr@r6rrrrKrrrrrrrr)sr)c@seZdZeZeZdS)r(N)rdrerfsfntDirectoryEntryFormatrrrrrrrr(sr(cs4eZdZeZeZfddZddZddZ Z S)r1cs"tt|ttdst|_dS)NzlibCompressionLevel)superr1r@rZLIB_COMPRESSION_LEVELrrFrrrr@s zWOFFDirectoryEntry.__init__cCsJddl}|j|jkr|}n,|j|jks*t||}t||jksFt|SNr)rvrrrN decompressr.)r<rrvr>rrrr$s  zWOFFDirectoryEntry.decodeDatacCsPt||_|jst||j}|js0t||jkr>|}|j|_n|}t||_|SrA)r.rrrsrr)r<r>ZcompressedDatarrrrr/s    zWOFFDirectoryEntry.encodeData) rdrerfwoffDirectoryEntryFormatrwoffDirectoryEntrySizerr@rr __classcell__rrrrr1s   r1c@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 ||_dSrA)rrrrrr$r rr r.rN _decompressrrr)r<readerrr>rrrr@As& zWOFFFlavorData.__init__cCsddl}||Sr)rvr)r<rrvrrrrVszWOFFFlavorData._decompress)N)rdrerfZFlavorr@rrrrrr;=s r;cCst|d}|r |dd|7}d}d}|ddks8ttdt||D]<}||||}tdt|d|}|t|d@}qH|S)a,Calculate the checksum for an arbitrary block of data. If the data length is not a multiple of four, it assumes it is to be padded with null byte. >>> print(calcChecksum(b"abcd")) 1633837924 >>> print(calcChecksum(b"abcdxyz")) 3655064932 r rri>%dLr)r.rNr4rr/r)r> remaindervalueZ blockSizer blockZlongsrrrrL\s rLcCs|d|t}t|tkr(tdt}tt|||j dkrNtd|j dksp|j dkspt d|j t d|j ||j d |_|j dkr|S) NrrttcfzNot a Font Collectionizunrecognized TTC version 0x%08xrr )r r ttcHeaderSizer.rrrr/ttcHeaderFormatTTCTagVersionrNrr+r,)r$r>r<rrrr*ts"     r*cCsdt}d|_d|_||_|d|tt|| }|t jd|jfdg|j|S)Nrrrr) rrrr+r rrrrr[r)r$r+r<rrrrwriteTTCHeaders $r__main__)1__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrrrr collectionsrlogging getLoggerrdrOrr rrurwrsryrcalcsizerr0r-rrr3r2rrr)r(r1r;rLr*rsysdoctestexittestmodfailedrrrrs^       `     ))