o aK @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.krddl+Z+ddl,Z,e+-e,.j/dSdS)/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.) 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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). rrozBad compression level: %s)compress)Z numiterations) ValueError USE_ZOPFLIzlibrpZ zopfli.zlib ZOPFLI_LEVELS)r;levelrprrrrps     rpc@sZeZdZddZ  dddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|r d|vr |d}n |rt|dkr|d}|tur,|dkr,ddlm}t|St|S)ze Return an instance of the SFNTWriter sub-class which is compatible with the specified 'flavor'. Nr#rfZwoff2r) WOFF2Writer)r+rvr rwrr)rrrr#rwrrrrs     zSFNTWriter.__new__rNcCs||_||_t||_||_||_|jdkr*t|_t|_ t |_ d|_ t |t|_n$|jr4Jd|jt|_t |_ t|_ ddlm}||d\|_|_|_|j|_|j|j ||j j|_|j|j|jd|j|jt|_dS)NrZwOFFUnknown flavor '%s'rgetSearchRange)r!r2rrr#r$r0directoryFormatr/ directorySizer.r& signaturer*sfntDirectoryEntrySizeorigNextTableOffsetr-r%fontTools.ttLibrz searchRange entrySelector rangeShiftrXdirectoryOffset formatSizenextTableOffsetr writerr7)r9r!r2rr#r$rzrrrr=s,     zSFNTWriter.__init__cCs$||jvr td|||j|<dS)Ncannot rewrite '%s' table)r7r)r9r4r<rrrsetEntrys  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.rrENrFrGrHTrrfr|)r7rr&r4rrrJrK headTable uncompressedsaveDatar!r#r origOffset origLengthlengthrrXr)r9r4r;r<rrr __setitem__s$  "  zSFNTWriter.__setitem__cCs |j|Sr>r?r@rrrrNrBzSFNTWriter.__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$d} |D]\}}|dkrd} ||%}q| r.|&||j|j#|j|d S)zHAll tables must have been written to disk. Now write the directory. z-wrong number of tables; expected %d, found %drrrrHr{rfrNrz>HHr rFrmrxrEr)'r5r7r6r+r2rr#rZreservedZ totalSfntSizerr$r8 majorVersion minorVersionhasattrstructr,rmetaDatametaOrigLengthr!r rX metaOffsetrp metaLengthrprivData privOffset privLengthrrpackr}rr~toStringwriteMasterChecksum) r9r7r4r<r;ZcompressedMetaDataZoffZ paddedOff directoryZseenHeadrrrrPsb                  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)Nrryr{l/ac)listr7rCr1r+appendrKr&r%rrzr2rrrrrr-r5r6r4rrrrrr*rrJsum) r9rZtagsZ checksumsrrzr7r4r<Z sfntEntryZ directory_endrMchecksumadjustmentrrr_calcMasterChecksum^s,      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrErFz>L)rr!r r7rrrr)r9rrrrrr|s zSFNTWriter.writeMasterChecksumcCsdSNFrrDrrrreordersTableszSFNTWriter.reordersTables)rNN) rarbrcrr=rrrNrPrrrrrrrrvs "B rva > # 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)rrDrrrr=rBzDirectoryEntry.__init__cCst|j||j|dSr>)rr,formatr r)r9r!rrrr3szDirectoryEntry.fromFilecCst|j||dSr>)rr,r)r9strrrr fromStringszDirectoryEntry.fromStringcCst|j|Sr>)rrrrDrrrrrQzDirectoryEntry.toStringcCs6t|drd|jj|jt|fSd|jjt|fS)Nr4z<%s '%s' at %x>z <%s at %x>)r __class__rar4idrDrrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jksJt|jdr ||}|S)N decodeData)r rr rr+rrrr9r!r;rrrrIs    zDirectoryEntry.loadDatacCs:t|jdr ||}t||_||j||dS)N encodeData)rrrr+rr rrrrrrrs    zDirectoryEntry.saveDatacC|Sr>r)r9rawDatarrrrrzDirectoryEntry.decodeDatacCrr>r)r9r;rrrrrzDirectoryEntry.encodeDataN) rarbrcr=r3rrrrIrrrrrrrr&s r&c@seZdZeZeZdS)r%N)rarbrcsfntDirectoryEntryFormatrrrrrrrr%sr%cs4eZdZeZeZfddZddZddZ Z S)r.cs&tt|ttdst|_dSdS)NzlibCompressionLevel)superr.r=rZLIB_COMPRESSION_LEVELrrDrrrr=s  zWOFFDirectoryEntry.__init__cCsLddl}|j|jkr|}|S|j|jksJ||}t||jks$J|SNr)rsrr decompressr+)r9rrsr;rrrrs  zWOFFDirectoryEntry.decodeDatacCsRt||_|jst||j}|jst||jkr |}|j|_|S|}t||_|Sr>)r+rrrprr)r9r;ZcompressedDatarrrrrs   zWOFFDirectoryEntry.encodeData) rarbrcwoffDirectoryEntryFormatrwoffDirectoryEntrySizerr=rr __classcell__rrrrr.s    r.c@s"eZdZdZdddZddZdS)r8rNcCsd|_d|_d|_d|_|r`|j|_|j|_|jrA|j|j|j|j}t ||jks0J| |}t ||j ks>J||_|j rb|j|j |j|j }t ||j ks[J||_dSdSdSr>)rrrrrr!r rr r+ _decompressrrr)r9readerrr;rrrr="s*   zWOFFFlavorData.__init__cCsddl}||Sr)rsr)r9rrsrrrr7s zWOFFFlavorData._decompressr>)rarbrcZFlavorr=rrrrrr8s  r8cCst|d}|r|dd|7}d}d}|ddksJtdt||D]}||||}tdt|d|}|t|d@}q$|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+r1rr,r)r;Z remaindervalueZ blockSizerblockZlongsrrrrJ<s rJcCs|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;r9rrrr'Ss    "  r'cCsft}d|_d|_||_|d|tt|| }|t jd|jgdg|jR|S)Nrrrr) rrrr(r rrrrrXr)r!r(r9rrrrwriteTTCHeaderbs &r__main__)0__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrrr collectionsrZloggingZ getLoggerrarLrrrrrrtrprvrZcalcsizerr-r*rrr0r/rrr&r%r.r8rJr'rsysZdoctestexitZtestmodZfailedrrrrs`       } I     )'