o nĎiY @sdZddlmZddlmZddlmZddlmZddl m Z ddl m Z ddl mZmZdd lZdd lmZdd lZeeZGd d d eZd ZdZdddddddddd ZefddZGdddeZdZe eZ dZ!e e!Z"dZ#e e#Z$d Z%e e%Z&d!Z'e e'Z(Gd"d#d#eZ)Gd$d%d%e)Z*Gd&d'd'e)Z+Gd(d)d)Z,d*d+Z-d,d-Z.d.d/Z/ed0krdd l0Z0dd l1Z1e02e13j4d Sd S)1attLib/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. ) annotations)KeysView)BytesIO)SimpleNamespace)Tag)sstruct) TTLibErrorTTLibFileIsCollectionErrorN) OrderedDictc@sdeZdZddZdddZdd d ZeZdddZd ddZd!ddZ d"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.woff2robject__new__)clsargskwargsinfile sfntVersionrrP/home/jeff/fluffinator/venv/lib/python3.10/site-packages/fontTools/ttLib/sfnt.pyr!s      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 flavorDataSFNTDirectoryEntryDirectoryEntryrrr readTTCHeadernumFontsr offsetTablesfntDirectorySizelenrrunpacksfntDirectoryFormatWOFFDirectoryEntrywoffDirectorySizewoffDirectoryFormatrrange numTablesfromFiletagr sorteditemstablesWOFFFlavorData) selfr'r( fontNumberheaderr.datar=r$entryr:rrr__init__2s^                 zSFNTReader.__init__r: str | bytesreturnboolcCs ||jvSNr=r?r:rrrhas_keyf zSFNTReader.has_key KeysView[Tag]cCs |jSrH)r=keysr?rrrrNkrLzSFNTReader.keysbytescCs|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?r:rCrBchecksumrrr __getitem__ns "  zSFNTReader.__getitem__NonecCs|jt|=dSrH)r=rrJrrr __delitem__szSFNTReader.__delitem__cCs|jdSrH)r'closerOrrrr^zSFNTReader.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'r`rbra)openpopr'rrcupdatergrrr __setstate__szSFNTReader.__setstate__N)rr)r:rErFrG)rFrM)r:rErFrP)r:rErFr\)rFr\) __name__ __module__ __qualname__rrDrK __contains__rNr[r]r^rirnrrrrr s  4     r FrrR 2d) rrtr rursrR 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). rr}zBad compression level: %s)compress) numiterations) ValueError USE_ZOPFLIzlibr~ zopfli.zlib ZOPFLI_LEVELS)rBlevelr~rrrr~s     r~c@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)rtwoff2r) WOFF2Writer)r1rrrrr)rrrr)rrrrrs     zSFNTWriter.__new__r NcCs||_||_t||_||_||_|jdkr*t|_t|_ t |_ d|_ t |t|_n$|jr4Jd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrwOFFUnknown flavor '%s'rgetSearchRange)r'r8rrr)r*r6directoryFormatr5 directorySizer4r, signaturer0sfntDirectoryEntrySizeorigNextTableOffsetr3r+fontTools.ttLibr searchRange entrySelector rangeShiftrfdirectoryOffset formatSizenextTableOffsetrwriter r=)r?r'r8rr)r*rrrrrDs<       zSFNTWriter.__init__cCs$||jvr td|||j|<dS)Ncannot rewrite '%s' table)r=r)r?r:rCrrrsetEntry 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.rrQNrRrSrTTrrtr)r=rr,r:rr#rVrW headTable uncompressedsaveDatar'r)r origOffset origLengthlengthrrfr)r?r:rBrCrrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|SrHrIrJrrrr[1rLzSFNTWriter.__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 %drrrrTrrtrNrz>HHr rRr{rrrQr)'r;r=r<r1r8rr)rreserved totalSfntSizerr*r> majorVersion minorVersionhasattrstructr2rmetaDatametaOrigLengthr'rrf metaOffsetr~ metaLengthrprivData privOffset privLengthrrpackrrrtoStringwriteMasterChecksum) r?r=r:rCrBcompressedMetaDataoff paddedOff directoryseenHeadrrrr^4sn                  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)Nrrrl/ac)r=rNappendrWr,r+rrr8rrrrrr3r;r<r:rr#rrrr0r1rrVsum) r?r checksumsr:rr=rC sfntEntry directory_endrZchecksumadjustmentrrr_calcMasterChecksum{s.      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrQrRz>L)rr'rr=r#rrr)r?rrrrrrs zSFNTWriter.writeMasterChecksumcCsdSNFrrOrrrreordersTableszSFNTWriter.reordersTables)r NN) rorprqrrDrrr[r^rrrrrrrrs 1G ra > # 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)rrOrrrrDrLzDirectoryEntry.__init__cCst|j||j|dSrH)rr2formatrr)r?r'rrrr9szDirectoryEntry.fromFilecCst|j||dSrH)rr2r)r?strrrr fromStringszDirectoryEntry.fromStringcCst|j|SrH)rrrrOrrrrr_zDirectoryEntry.toStringcCs6t|drd|jj|jt|fSd|jjt|fS)Nr:z<%s '%s' at %x>z <%s at %x>)r __class__ror:idrOrrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jksJt|jdr ||}|S)N decodeData)rr#rrr1rrrr?r'rBrrrrUs    zDirectoryEntry.loadDatacCs:t|jdr ||}t||_||j||dS)N encodeData)rrrr1rrr#rrrrrrs    zDirectoryEntry.saveDatacC|SrHr)r?rawDatarrrr rzDirectoryEntry.decodeDatacCrrHr)r?rBrrrr rzDirectoryEntry.encodeDataN) rorprqrDr9rrrrUrrrrrrrr,s r,c@seZdZeZeZdS)r+N)rorprqsfntDirectoryEntryFormatrrrrrrrr+sr+cs4eZdZeZeZfddZddZddZ Z S)r4cs&tt|ttdst|_dSdS)NzlibCompressionLevel)superr4rDrZLIB_COMPRESSION_LEVELrrOrrrrDs  zWOFFDirectoryEntry.__init__cCsLddl}|j|jkr|}|S|j|jksJ||}t||jks$J|SNr)rrr decompressr1)r?rrrBrrrr%s  zWOFFDirectoryEntry.decodeDatacCsRt||_|jst||j}|jst||jkr |}|j|_|S|}t||_|SrH)r1rrr~rr)r?rBcompressedDatarrrrr0s   zWOFFDirectoryEntry.encodeData) rorprqwoffDirectoryEntryFormatrwoffDirectoryEntrySizerrDrr __classcell__rrrrr4s    r4c@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||_dSdSdSrH)rrrrrr'rrrr1 _decompressrrr)r?readerrrBrrrrDAs*   zWOFFFlavorData.__init__cCsddl}||Sr)rr)r?rrrrrrVs zWOFFFlavorData._decompressrH)rorprqFlavorrDrrrrrr>>s  r>cCst|d}|r|dd|7}d}d}|ddksJtdt||D]}||||}tdt|d|}|t|d@}q$|S)a,Calculate the checksum for an arbitrary block of data. If the data length is not a multiple of four, it assumes it is to be padded with null byte. >>> print(calcChecksum(b"abcd")) 1633837924 >>> print(calcChecksum(b"abcdxyz")) 3655064932 r rri>%dLr)r1r7rr2r)rB remaindervalue blockSizer$blocklongsrrrrV\s rVcCs|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 )rr ttcHeaderSizer1rrrr2ttcHeaderFormatTTCTagVersionrr.r/)r'rBr?rrrr-ts"     r-cCsft}d|_d|_||_|d|tt|| }|t jd|jgdg|jR|S)Nrrrr) rrrr.rrrrrrfr)r'r.r?r#rrrwriteTTCHeaders &r__main__)5__doc__ __future__rcollections.abcriortypesrfontTools.misc.textToolsrfontTools.miscrrrr r collectionsr logging getLoggerrorXrr rrrr~rrcalcsizerr3r0rrr6r5rrr,r+r4r>rVr-rsysdoctestexittestmodfailedrrrrsf         _     )(