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A stub loader is an image loader that can identify files of a certain format, but relies on external code to load the file. rrbc$d}t|)Nz+StubImageFile subclass must implement _openNotImplementedErrorrTrs rrIzStubImageFile._openqs;!#&&&r&c|}|d|jd}t|||}|J|j|_|j|_|S)Nzcannot find loader for this z file)_loadrZrrtrV__dict__)rTloaderrimages rrtzStubImageFile.loaduso >CCCCC#,,  D!!    zz||r&StubHandler | Nonec$d}t|)z (Hook) Find actual image loader.z+StubImageFile subclass must implement _loadrrs rrzStubImageFile._loads;!#&&&r&Nr)rr)r4r5r6rrIrtrr)r&rrrisU''''   ''''''r&rcXeZdZUdZdZdZded<dZdZdZ dZ ddZ d Z d Z dd ZdZdS)Parserzj Incremental image parser. This class implements the standard feed/close consumer interface. NzImage.Image | Nonerrrrbc(|j JddS)z (Consumer) Reset the parser. Note that you can only call this method immediately after you've created a parser; parser instances cannot be reused. Nzcannot reuse parsers)datar]s rresetz Parser.resets! y  "8     r&c|jrdS|j||_n|j|z|_|jr|jdkr^t t |j|j}|j|d|_|j|z |_|jdks|jsdS|j|j\}}|dkr.d|_d|_|dkrd|_t|ddS|j|d|_dS|jrdS tj |j5}tj |}dddn #1swxYwYt|dpt|d}|st |jdkrd|_n||jd\}}} } g|_tj|j|| |j|_|j|j|| |_|jt |jkr |j|jd|_d|_||_dS#t*$rYdSwxYw)z (Consumer) Feed data to the parser. :param data: A string buffer. :exception OSError: If the parser failed to parse the image file. NrrFr%r{ry)finishedrrr2minrvrrr ioBytesIOrrErwr@rrrPrBrrr) rTrskiprrrFrflagdoas rfeedz Parser.feeds =  F 9 DII D(DI <8 {Q3ty>>4;77 Idee, "kD0 ;??$)?F<&&ty11DAq1uu  ! q55!%DJ&q%8888F !"" DIII Z  D Z **(bBB((((((((((((((( r;//K72{3K3K(3rw<<1,,"&DKKOO%%%!#JAq!Q BG#(#4RWaBDT#U#UDLL))"%333#$DK{c$)nn44$(Idkmm$< &'  +    s6I'E< IE  IE I I#"I#c|SrYr)r]s r __enter__zParser.__enter__s r&r3objectc.|dSrY)rSrTr3s r__exit__zParser.__exit__s r&c|jr;|ddx|_|_|jsd}t ||jsd}t ||jrt j|j5} tj ||_|j n#|j wxYw dddn #1swxYwY|jS)a (Consumer) Close the stream. :returns: An image object. :exception OSError: If the parser failed to parse the image file either because it cannot be identified or cannot be decoded. r&Nzimage was incompletezcannot parse this image) rrrrrrrrrrErt)rTrrFs rrSz Parser.closes < # IIcNNN'+ +DI = #,cll"z +C#,,  9 &DI&& &"&!&BDJJOO%%%%DJOO%%%%%  & & & & & & & & & & & & & & & zs*;C=B0C0C  CC"Cr)r3rrrb)r4r5r6r incrementalrr7rrr2rrrrrrSr)r&rrrs K $E$$$$ DG FH9999J J J Xr&rrbc |t|dsd|_|tt t ||jddz} |}| t|||||n7#ttj f$r}t||||d|Yd}~nd}~wwxYwt|dr| dSdS)zHelper to save image based on tile list :param im: Image object. :param fp: File object. :param tile: Tile list. :param bufsize: Optional buffer size encoderconfigr)rjrNflush)rtrwrrr+maxrCrQrr _encode_tilerrUnsupportedOperation)rrFr@bufsizefhexcs r_saversGGIII 2 ' 'II)I (GRWQZ!^44G7 YY[[  RT7B//// B3 4777RT7D#666666667r7  s,;B((C>CCr@ list[_Tile]cn|D]0\}}}} |dkr||tj|j|| |j} | |j|| jr0| || d} nS|r; | |dd\} } | | | rn9n| ||} | dkrt| d| | #| wxYwdS)NrrTr%)r|r _getencoderrPrrr pushes_fdrencode_to_pyfdencodewriteencode_to_filer r) rrFr@rrr encoder_namer1r2r3rerrcoders rrr,s_/3+ gvt A:: GGFOOO#BG\4AQRR    RUG , , , B b!!!!002215 B"(/w(?(?(C ""! ""&44RAAG{{"7D999sB OO    GOO    /s B=DD2c|dkrdS|tkr;||}t||krd}t||Sg}|}|dkrX|t |t}|sn-|||t|z}|dkXt d|D|krd}t|d|S)a Reads large blocks in a safe way. Unlike fp.read(n), this function doesn't trust the user. If the requested size is larger than SAFEBLOCK, the file is read block by block. :param fp: File handle. Must implement a read method. :param size: Number of bytes to read. :returns: A string containing size bytes of data. Raises an OSError if the file is truncated and the read cannot be completed rr&zTruncated File Readc34K|]}t|VdSrY)rv)rnrs r z_safe_read..ds( a3q66 r&) SAFEBLOCKrzrvrrappendsumjoin)rFrQrrremaining_sizeblocks r _safe_readrGs qyys ywwt}} t99t  'C#,,  DN 1  NI6677   E#e**$ 1    4   4''#cll 88D>>r&ceZdZddZddZdS) PyCodecStaterrbc>d|_d|_d|_d|_dS)Nr)xsizeysizexoffyoffr]s rr=zPyCodecState.__init__ks"    r&r0cV|j|j|j|jz|j|jzfSrY)rrrrr]s rr1zPyCodecState.extentsqs'y$)TY%;TY=SSSr&Nr)rr0)r4r5r6r=r1r)r&rrrjsB TTTTTTr&rc>eZdZUded<dZdZd dZdZddd Zd S)PyCodeczIO[bytes] | Nonefdcd|_t|_d|_||_||dSrY)rrrarrPinit)rTrPr3s rr=zPyCodec.__init__xs5!^^   $r&c||_dS)z Override to perform codec specific initialization :param args: Array of args items from the tile entry :returns: None N)r3rs rrz PyCodec.inits r&rrbcdS)zT Override to perform codec specific cleanup :returns: None Nr)r]s rrzPyCodec.cleanups r&c||_dS)z Called from ImageFile to set the Python file-like object :param fd: A Python file-like object :returns: None N)r)rTrs rrz PyCodec.setfdsr&Nr1 tuple[int, int, int, int] | Nonec:||_|r|\}}}}nd\}}}}|dkr*|dkr$|jj\|j_|j_n6||j_||j_||z |j_||z |j_|jjdks|jjdkrd}t||jj|jjz|jjdks-|jj|jjz|jjdkrd}t|dS)z Called from ImageFile to set the core output image for the codec :param im: A core image object :param extents: a 4 tuple of (x0, y0, x1, y1) defining the rectangle for this tile :returns: None )rrrrrzSize cannot be negativerz Tile cannot extend outside imageN)rrQrarrrr ValueError)rTrr1x0y0x1y1rs rrzPyCodec.setimages  ,& RR+ RR 77rQww15 .DJ dj.. DJO DJO!BwDJ !BwDJ  : q DJ$4$9$9+CS// ! J tz .a @ @z$*/1DGLOCC4CS// !DCr&rrY)r1rrrb) r4r5r6r7r=rrrrr)r&rrrus|    #"#"#"#"#"#"#"r&rc@eZdZdZdZeddZdd Zddd Zd S) PyDecoderz Python implementation of a format decoder. Override this class and add the decoding logic in the :meth:`decode` method. See :ref:`Writing Your Own File Codec in Python` Frrc|jSrY) _pulls_fdr]s rrzPyDecoder.pulls_fds ~r&bufferbytestuple[int, int]c$d}t|)a= Override to perform the decoding process. :param buffer: A bytes object with the data to be decoded. :returns: A tuple of ``(bytes consumed, errcode)``. If finished with decoding return -1 for the bytes consumed. Err codes are from :data:`.ImageFile.ERRORS`. zunavailable in base decoderr)rTrrs rrzPyDecoder.decode,!#&&&r&Nrrbcb|s|j}tj|jd|}|jJ||j|j||}|ddkrd}t||ddkrd}t|dS)a Convenience method to set the internal image from a stream of raw data :param data: Bytes to be set :param rawmode: The rawmode to be used for the decoder. If not specified, it will default to the mode of the image :returns: None rgNrznot enough image datarzcannot decode image data) rPrrrrrar1rr )rTrrawmoderrrs r set_as_rawzPyDecoder.set_as_raws iG  di 8 8w""" 47DJ..00111 HHTNN Q4199)CS// ! Q4199,CS// ! 9r&rr)rrrrrY)rrrrb) r4r5r6rrpropertyrrrr)r&rrrspI X ' ' ' '"""""""r&rcDeZdZdZdZeddZdd Zdd Zd Z d S) PyEncoderz Python implementation of a format encoder. Override this class and add the decoding logic in the :meth:`encode` method. See :ref:`Writing Your Own File Codec in Python` Frrc|jSrY) _pushes_fdr]s rrzPyEncoder.pushes_fds r&rrtuple[int, int, bytes]c$d}t|)a  Override to perform the encoding process. :param bufsize: Buffer size. :returns: A tuple of ``(bytes encoded, errcode, bytes)``. If finished with encoding return 1 for the error code. 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