a w=icK @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.krxddl+Z+ddl,Z,e+-e,.j/dS)/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). rrpzBad compression level: %s)compress)Z numiterationsN) ValueError USE_ZOPFLIzlibrqZ zopfli.zlib ZOPFLI_LEVELS)r=levelrqrrrrqs     rqc@sVeZdZddZdddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|rd|vr|d}n|r2t|dkr2|d}|turX|dkrXddlm}t|St|S)ze Return an instance of the SFNTWriter sub-class which is compatible with the specified 'flavor'. 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Now write the directory. z-wrong number of tables; expected %d, found %drrrrIr|rgrNrz>HHr rGrnryrFr)'r7r9r8r-r4rr%rreservedZ totalSfntSizerr&r: majorVersion minorVersionhasattrstructr.rmetaDatametaOrigLengthr#r rY metaOffsetrq metaLengthrprivData privOffset privLengthrrpackr~rrtoStringwriteMasterChecksum) r;r9r6r>r=ZcompressedMetaDataoffZ paddedOff directoryZseenHeadrrrrRs`                  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|ksJ|t|t|d@} d| d@} | S)Nrrzr|l/ac)listr9rDr3r-appendrLr(r'rr{r4rrrrrr/r7r8r6rrrrrr,rrKsum) r;rtagsZ checksumsrr{r9r6r>Z sfntEntryZ directory_endrOchecksumadjustmentrrr_calcMasterChecksum^s,      zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)NrFrGz>L)rr#r r9rrrr)r;rrrrrr|s zSFNTWriter.writeMasterChecksumcCsdSNFrrErrrreordersTablesszSFNTWriter.reordersTables)rNN) rbrcrdrr?rrrPrRrrrrrrrrws "Brwa > # 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)rrErrrr?szDirectoryEntry.__init__cCst|j||j|dSr@)rr.formatr r)r;r#rrrr5szDirectoryEntry.fromFilecCst|j||dSr@)rr.r)r;strrrr fromStringszDirectoryEntry.fromStringcCst|j|Sr@)rrrrErrrrszDirectoryEntry.toStringcCs:t|dr"d|jj|jt|fSd|jjt|fSdS)Nr6z<%s '%s' at %x>z <%s at %x>)r __class__rbr6idrErrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jks*Jt|jdr@||}|S)N decodeData)r rr rr-rrrr;r#r=rrrrJs     zDirectoryEntry.loadDatacCs:t|jdr||}t||_||j||dS)N encodeData)rrrr-rr rrrrrrrs     zDirectoryEntry.saveDatacCs|Sr@r)r;rawDatarrrrszDirectoryEntry.decodeDatacCs|Sr@r)r;r=rrrrszDirectoryEntry.encodeDataN) rbrcrdr?r5rrrrJrrrrrrrr(sr(c@seZdZeZeZdS)r'N)rbrcrdsfntDirectoryEntryFormatrrrrrrrr'sr'cs4eZdZeZeZfddZddZddZ Z S)r0cs"tt|ttdst|_dS)NzlibCompressionLevel)superr0r?rZLIB_COMPRESSION_LEVELrrErrrr?s zWOFFDirectoryEntry.__init__cCsJddl}|j|jkr|}n,|j|jks*J||}t||jksFJ|SNr)rtrr decompressr-)r;rrtr=rrrrs  zWOFFDirectoryEntry.decodeDatacCsPt||_|jst||j}|js0t||jkr>|}|j|_n|}t||_|Sr@)r-rrrqrr)r;r=ZcompressedDatarrrrrs    zWOFFDirectoryEntry.encodeData) rbrcrdwoffDirectoryEntryFormatrwoffDirectoryEntrySizerr?rr __classcell__rrrrr0s   r0c@s"eZdZdZdddZddZdS)r:rNcCsd|_d|_d|_d|_|r|j|_|j|_|jr|j|j|j|j}t ||jks`J| |}t ||j ks|J||_|j r|j|j |j|j }t ||j ksJ||_dSr@)rrrrrr#r rr r- _decompressrrr)r;readerrr=rrrr?"s& zWOFFFlavorData.__init__cCsddl}||Sr)rtr)r;rrtrrrr7szWOFFFlavorData._decompress)N)rbrcrdZFlavorr?rrrrrr:s r:cCst|d}|r |dd|7}d}d}|ddks8Jtdt||D]<}||||}tdt|d|}|t|d@}qH|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-r3rr.r)r= remaindervalueZ blockSizerblockZlongsrrrrK<s rKcCs|d|t}t|tkr(tdt}tt|||j dkrNtd|j dksp|j dkspJd|j t d|j ||j d |_ |j dkr|S) NrrttcfzNot a Font Collectionizunrecognized TTC version 0x%08xrr )r r ttcHeaderSizer-rrrr.ttcHeaderFormatTTCTagVersionrr*r+)r#r=r;rrrr)Ss    "  r)cCsft}d|_d|_||_|d|tt|| }|t jd|jgdg|jR|S)Nrrrr) rrrr*r rrrrrYr)r#r*r;rrrrwriteTTCHeaderbs &r__main__)0__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrrr collectionsrlogging getLoggerrbrMrrrrsrurqrwrcalcsizerr/r,rrr2r1rrr(r'r0r:rKr)rsysdoctestexittestmodfailedrrrrs\       } I     )'