o h0Y @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. rwOF2) WOFF2Reader)r seekrreadfontTools.ttLib.woff2r object__new__)clsargskwargsinfile sfntVersionr rh/var/www/html/construction_image-detection-poc/venv/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))OTTOtruez1Not a TrueType or OpenType font (bad sfntVersion)cSs |djS)Nr)offset)irrr]s z%SFNTReader.__init__..)key) filecheckChecksumsflavor flavorDataSFNTDirectoryEntryDirectoryEntryr rr readTTCHeadernumFontsr offsetTablesfntDirectorySizelenrrunpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatrrange numTablesfromFiletagrsorteditemstablesWOFFFlavorData) selfr%r& fontNumberheaderr,datar;r"entryr8rrr__init__/s^                 zSFNTReader.__init__cCs ||jvSNr;r=r8rrrhas_keyc zSFNTReader.has_keycCs |jSrC)r;keysr=rrrrHhrGzSFNTReader.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) r;rloadDatar%r& calcChecksumcheckSumlogwarning)r=r8rAr@checksumrrr __getitem__ks "  zSFNTReader.__getitem__cCs|jt|=dSrC)r;rrErrr __delitem__}szSFNTReader.__delitem__cCs|jdSrC)r%closerIrrrrVzSFNTReader.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%rXrbrY)openpopr%r r[updater_rrr __setstate__szSFNTReader.__setstate__N)rr) __name__ __module__ __qualname__rrBrF __contains__rHrTrUrVrarfrrrrr s 4 r FrrK 2d) rrlr rmrkrK 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). rruzBad compression level: %s)compress) numiterations) ValueError USE_ZOPFLIzlibrv zopfli.zlib ZOPFLI_LEVELS)r@levelrvrrrrvs     rvc@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'rlwoff2r) WOFF2Writer)r/r~rrrr)rrrr'rrrrrs     zSFNTWriter.__new__rNcCs||_||_t||_||_||_|jdkr*t|_t|_ t |_ d|_ t |t|_n$|jr4Jd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrwOFFUnknown flavor '%s'rgetSearchRange)r%r6rrr'r(r4directoryFormatr3 directorySizer2r* signaturer.sfntDirectoryEntrySizeorigNextTableOffsetr1r)fontTools.ttLibr searchRange entrySelector rangeShiftr^directoryOffset formatSizenextTableOffsetr writerr;)r=r%r6rr'r(rrrrrBs<       zSFNTWriter.__init__cCs$||jvr td|||j|<dS)Ncannot rewrite '%s' table)r;r)r=r8rArrrsetEntry 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.rrJNrKrLrMTrrlr)r;rr*r8rr!rOrP headTable uncompressedsaveDatar%r'r origOffset origLengthlengthrr^r)r=r8r@rArrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|SrCrDrErrrrT.rGzSFNTWriter.__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 %drrrrMrrlrNrz>HHr rKrsrrrJr)'r9r;r:r/r6rr'rreserved totalSfntSizerr(r< majorVersion minorVersionhasattrstructr0rmetaDatametaOrigLengthr%r r^ metaOffsetrv metaLengthrprivData privOffset privLengthrrpackrrrtoStringwriteMasterChecksum) r=r;r8rAr@compressedMetaDataoff paddedOff directoryseenHeadrrrrV1sn                  zSFNTWriter.closec Cst|j}g}tt|D] }||j||jq|jtkraddl m }||j d\|_ |_ |_tt|}t|j}|D]\}}t} |j| _|j| _|j| _|j| _|| }qCtt|jt} | t|ksrJ|t|t|d@} d| d@} | S)Nrrrl/ac)listr;rHr5r/appendrPr*r)rrr6rrrrrr1r9r:r8rr!rrrr.rrOsum) r=rtags checksumsr"rr;r8rA sfntEntry directory_endrSchecksumadjustmentrrr_calcMasterChecksumxs0      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrJrKz>L)rr%r r;r!rrr)r=rrrrrrs zSFNTWriter.writeMasterChecksumcCsdSNFrrIrrrreordersTableszSFNTWriter.reordersTables)rNN) rgrhrirrBrrrTrVrrrrrrrr~s 1G! r~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@sTeZdZddZddZddZddZd d Zd d Zd dZ ddZ ddZ dS)r*cCs d|_dSr)rrIrrrrBrGzDirectoryEntry.__init__cCst|j||j|dSrC)rr0formatrr)r=r%rrrr7szDirectoryEntry.fromFilecCst|j||dSrC)rr0r)r=strrrr fromStringszDirectoryEntry.fromStringcCst|j|SrC)rrrrIrrrrrWzDirectoryEntry.toStringcCs6t|drd|jj|jt|fSd|jjt|fS)Nr8z<%s '%s' at %x>z <%s at %x>)r __class__rgr8idrIrrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jksJt|jdr ||}|S)N decodeData)r r!rrr/rrrr=r%r@rrrrNs    zDirectoryEntry.loadDatacCs:t|jdr ||}t||_||j||dS)N encodeData)rrrr/rr r!rrrrrrs    zDirectoryEntry.saveDatacC|SrCr)r=rawDatarrrrrzDirectoryEntry.decodeDatacCrrCr)r=r@rrrr rzDirectoryEntry.encodeDataN) rgrhrirBr7rrrrNrrrrrrrr*s r*c@seZdZeZeZdS)r)N)rgrhrisfntDirectoryEntryFormatrrrrrrrr)sr)cs4eZdZeZeZfddZddZddZ Z S)r2cs&tt|ttdst|_dSdS)NzlibCompressionLevel)superr2rBrZLIB_COMPRESSION_LEVELrrIrrrrBs  zWOFFDirectoryEntry.__init__cCsLddl}|j|jkr|}|S|j|jksJ||}t||jks$J|SNr)rzrr decompressr/)r=rrzr@rrrr#s  zWOFFDirectoryEntry.decodeDatacCsRt||_|jst||j}|jst||jkr |}|j|_|S|}t||_|SrC)r/rrrvrr)r=r@compressedDatarrrrr.s   zWOFFDirectoryEntry.encodeData) rgrhriwoffDirectoryEntryFormatrwoffDirectoryEntrySizerrBrr __classcell__rrrrr2s    r2c@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||_dSdSdSrC)rrrrrr%r rrr/ _decompressrrr)r=readerrr@rrrrB?s*   zWOFFFlavorData.__init__cCsddl}||Sr)rzr)r=rrzrrrrTs zWOFFFlavorData._decompressrC)rgrhriFlavorrBrrrrrr<<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/r5rr0r)r@ remaindervalue blockSizer"blocklongsrrrrOZs rOcCs|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/rrrr0ttcHeaderFormatTTCTagVersionrr,r-)r%r@r=rrrr+rs"     r+cCsft}d|_d|_||_|d|tt|| }|t jd|jgdg|jR|S)Nrrrr) rrrr,r rrrrr^r)r%r,r=r!rrrwriteTTCHeaders &r__main__)1__doc__iortypesrfontTools.misc.textToolsrfontTools.miscrrrrr collectionsrlogging getLoggerrgrQrr rryr|rvr~rcalcsizerr1r.rrr4r3rrr*r)r2r<rOr+rsysdoctestexittestmodfailedrrrrsb       `     )(