B 0ufK @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). rrhzBad compression level: %s)compress)Z numiterationsN) ValueError USE_ZOPFLIzlibriZ zopfli.zlib ZOPFLI_LEVELS)r:levelrirrrris     ric@sVeZdZddZdddZddZd d Zd d Zd dZddZ ddZ ddZ dS) SFNTWritercOsbd}|rd|kr|d}n|r2t|dkr2|d}|tkrX|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 %drswOFFrrArsr_rNrz>HHr r@rfzUnknown flavor '%s'r?r)(r4r6r5r*r1rr"rwreservedZ totalSfntSizerr#r7 majorVersion minorVersionhasattrstructr+rmetaDatametaOrigLengthr r rR metaOffsetri metaLengthrprivData privOffset privLengthrrErpackrur~rvtoStringwriteMasterChecksum) r8r6r3r;r:ZcompressedMetaDataoffZ paddedOff directoryZseenHeadrrrrKs`                zSFNTWriter.closec Cst|j}g}x*tt|D]}||j||jq W|jtkrddl m }||j d\|_ |_ |_tt|}t|j}xB|D]:\}}t} |j| _|j| _|j| _|j| _|| }qWtt|jt} | t|kst|t|t|d@} d| d@} | S)Nr)rrrsll/ac)listr6r>r0r*appendrDr%r$rzrrr1r{r|r}rrr,r4r5r3rrrrrr)rxrErCsum) r8rtagsZ checksumsrrrr6r3r;Z sfntEntryZ directory_endrHchecksumadjustmentrrr_calcMasterChecksum^s,     zSFNTWriter._calcMasterChecksumcCs:||}|j|jdjd|jtd|dS)Nr?r@z>L)rr r r6rrrr)r8rrrrrr|s zSFNTWriter.writeMasterChecksumcCsdS)NFr)r8rrrreordersTablesszSFNTWriter.reordersTables)rqNN) rZr[r\rr<rrrIrKrrrrrrrros !Broa > # 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|_dS)NF)r)r8rrrr<szDirectoryEntry.__init__cCst|j||j|dS)N)rr+formatr r)r8r rrrr2szDirectoryEntry.fromFilecCst|j||dS)N)rr+r)r8strrrr fromStringszDirectoryEntry.fromStringcCst|j|S)N)rrr)r8rrrrszDirectoryEntry.toStringcCs:t|dr"d|jj|jt|fSd|jjt|fSdS)Nr3z<%s '%s' at %x>z <%s at %x>)r __class__rZr3id)r8rrr__repr__s zDirectoryEntry.__repr__cCsD||j||j}t||jks*tt|jdr@||}|S)N decodeData) r rr rr*rErrr)r8r r:rrrrBs     zDirectoryEntry.loadDatacCs:t|jdr||}t||_||j||dS)N encodeData)rrrr*rr rr)r8r r:rrrrs     zDirectoryEntry.saveDatacCs|S)Nr)r8rawDatarrrrszDirectoryEntry.decodeDatacCs|S)Nr)r8r:rrrrszDirectoryEntry.encodeDataN) rZr[r\r<r2rrrrBrrrrrrrr%sr%c@seZdZeZeZdS)r$N)rZr[r\sfntDirectoryEntryFormatrrxrrrrrr$sr$cs4eZdZeZeZfddZddZddZ Z S)r-cs"tt|ttdst|_dS)NzlibCompressionLevel)superr-r<rZLIB_COMPRESSION_LEVELr)r8)rrrr<s zWOFFDirectoryEntry.__init__cCsJddl}|j|jkr|}n,|j|jks*t||}t||jksFt|S)Nr)rlrrrE decompressr*)r8rrlr:rrrrs  zWOFFDirectoryEntry.decodeDatacCsPt||_|jst||j}|js0t||jkr>|}|j|_n|}t||_|S)N)r*rrrirr)r8r:ZcompressedDatarrrrrs    zWOFFDirectoryEntry.encodeData) rZr[r\woffDirectoryEntryFormatrwoffDirectoryEntrySizerr<rr __classcell__rr)rrr-s   r-c@s"eZdZdZdddZddZdS)r7rNcCsd|_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 ||_dS)N)rrrrrr r rr r*rE _decompressrrr)r8readerrr:rrrr<"s& zWOFFFlavorData.__init__cCsddl}||S)Nr)rlr)r8rrlrrrr7szWOFFFlavorData._decompress)N)rZr[r\ZFlavorr<rrrrrr7s r7cCst|d}|r |dd|7}d}d}|ddks8txPtdt||D]<}||||}tdt|d|}|t|d@}qJW|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 rtriz>%dLl)r*rEr0rr+r)r: remaindervalueZ blockSizerblockZlongsrrrrC<s rCcCs|d|t}t|tkr(tdt}tt|||j dkrNtd|j dksp|j dkspt d|j t d|j ||j d |_|j dkr|S) Nrz'Not a Font Collection (not enough data)ttcfzNot a Font Collectioniizunrecognized TTC version 0x%08xz>%dLr )r r ttcHeaderSizer*rrrr+ttcHeaderFormatTTCTagVersionrErr'r()r r:r8rrrr&Ss    "  r&cCsdt}d|_d|_||_|d|tt|| }|t jd|jfdg|j|S)Nrirz>%dL) rrrr'r rrrrrRr)r r'r8rrrrwriteTTCHeaderbs $r__main__)0__doc__iortypesrZfontTools.misc.textToolsrZfontTools.miscrrzrr collectionsrlogging getLoggerrZrFrrrrkrmrirorcalcsizerr,r)rrxr/r.rrr%r$r-r7rCr&rsysdoctestexittestmodfailedrrrr sZ       } R     )'