B W_+@sddlmZmZmZddlmZmZmZddlm Z m Z m Z ddl m Z Gddde ZGdd d eZGd d d eZGd d d eZddZGdddeZGdddeZGdddeZGdddeZGdddeZdS))absolute_importdivisionprint_function) MIME_TYPETIFF_FLDTIFF_TAG) BIG_ENDIAN LITTLE_ENDIAN StreamReader)BaseImageHeaderc@s4eZdZdZeddZeddZeddZdS) Tiffzd Image header parser for TIFF images. Handles both big and little endian byte ordering. cCstjS)zm Return the MIME type of this TIFF image, unconditionally the string ``image/tiff``. )rZTIFF)selfrA/var/www/html/venv/lib/python3.7/site-packages/docx/image/tiff.py content_typeszTiff.content_typecCsdS)zL Default filename extension, always 'tiff' for TIFF images. Ztiffr)rrrr default_extszTiff.default_extcCs0t|}|j}|j}|j}|j}|||||S)zk Return a |Tiff| instance containing the properties of the TIFF image in *stream*. ) _TiffParserparsepx_width px_heighthorz_dpivert_dpi)clsstreamparserrrrrrrr from_streams  zTiff.from_streamN) __name__ __module__ __qualname____doc__propertyrr classmethodrrrrrr s  r cs|eZdZdZfddZeddZeddZedd Z ed d Z ed d Z eddZ ddZ eddZZS)rzu Parses a TIFF image stream to extract the image properties found in its main image file directory (IFD) cstt|||_dS)N)superr__init__ _ifd_entries)r ifd_entries) __class__rrr$3sz_TiffParser.__init__cCs(||}|d}t||}||S)z Return an instance of |_TiffParser| containing the properties parsed from the TIFF image in *stream*. )_make_stream_reader read_long _IfdEntriesr)rr stream_rdrZ ifd0_offsetr&rrrr7s   z_TiffParser.parsecCs |tjS)z The horizontal dots per inch value calculated from the XResolution and ResolutionUnit tags of the IFD; defaults to 72 if those tags are not present. )_dpirZ X_RESOLUTION)rrrrrBsz_TiffParser.horz_dpicCs |tjS)z The vertical dots per inch value calculated from the XResolution and ResolutionUnit tags of the IFD; defaults to 72 if those tags are not present. )r-rZ Y_RESOLUTION)rrrrrKsz_TiffParser.vert_dpicCs|jtjS)z The number of stacked rows of pixels in the image, |None| if the IFD contains no ``ImageLength`` tag, the expected case when the TIFF is embeded in an Exif image. )r%getrZ IMAGE_LENGTH)rrrrrTsz_TiffParser.px_heightcCs|jtjS)z The number of pixels in each row in the image, |None| if the IFD contains no ``ImageWidth`` tag, the expected case when the TIFF is embeded in an Exif image. )r%r.rZ IMAGE_WIDTH)rrrrr]sz_TiffParser.px_widthcCs$|d|d}|dkr tStS)z Return either BIG_ENDIAN or LITTLE_ENDIAN depending on the endian indicator found in the TIFF *stream* header, either 'MM' or 'II'. rsMM)seekreadr r )rrZ endian_strrrr_detect_endianfs  z_TiffParser._detect_endiancCs^|j}||krdStj|kr&|tjnd}|dkr6dS|dkrBdnd}||}tt||S)a) Return the dpi value calculated for *resolution_tag*, which can be either TIFF_TAG.X_RESOLUTION or TIFF_TAG.Y_RESOLUTION. 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Hr/rgRQ@)r%rZRESOLUTION_UNITintround)rZresolution_tagr&Zresolution_unitZunits_per_inchZ dots_per_unitrrrr-psz_TiffParser._dpicCs||}t||S)z Return a |StreamReader| instance with wrapping *stream* and having "endian-ness" determined by the 'MM' or 'II' indicator in the TIFF stream header. )r2r )rrZendianrrrr)s z_TiffParser._make_stream_reader)rrrr r$r"rr!rrrrr2r-r) __classcell__rr)r'rr.s  rcsFeZdZdZfddZddZddZedd Zd d d Z Z S)r+z Image File Directory for a TIFF image, having mapping (dict) semantics allowing "tag" values to be retrieved by tag code. cstt|||_dS)N)r#r+r$_entries)rentries)r'rrr$sz_IfdEntries.__init__cCs |j|S)zG Provides ``in`` operator, e.g. ``tag in ifd_entries`` )r7 __contains__)rkeyrrrr9sz_IfdEntries.__contains__cCs |j|S)zU Provides indexed access, e.g. ``tag_value = ifd_entries[tag_code]`` )r7 __getitem__)rr:rrrr;sz_IfdEntries.__getitem__cCs(t||}tdd|D}||S)zh Return a new |_IfdEntries| instance parsed from *stream* starting at *offset*. css|]}|j|jfVqdS)N)tagvalue).0errr sz*_IfdEntries.from_stream..) _IfdParserdict iter_entries)rroffsetZ ifd_parserr8rrrrs z_IfdEntries.from_streamNcCs|j||S)zz Return value of IFD entry having tag matching *tag_code*, or *default* if no matching tag found. )r7r.)rtag_codedefaultrrrr.sz_IfdEntries.get)N) rrrr r$r9r;r"rr.r6rr)r'rr+s   r+cs4eZdZdZfddZddZeddZZS)rAzk Service object that knows how to extract directory entries from an Image File Directory (IFD) cstt|||_||_dS)N)r#rAr$ _stream_rdr_offset)rr,rD)r'rrr$sz_IfdParser.__init__ccs<x6t|jD](}|jd|d}t|j|}|Vq WdS)zh Generate an |_IfdEntry| instance corresponding to each entry in the directory. r/ N)range _entry_countrH_IfdEntryFactoryrG)ridxZdir_entry_offsetZ ifd_entryrrrrCs z_IfdParser.iter_entriescCs|j|jS)zU The count of directory entries, read from the top of the IFD header )rG read_shortrH)rrrrrKsz_IfdParser._entry_count) rrrr r$rCr!rKr6rr)r'rrAs  rAcCsJtjttjttjttjti}| |d}||kr:||}nt }| ||S)z~ Return an |_IfdEntry| subclass instance containing the value of the directory entry at *offset* in *stream_rdr*. r/) rASCII_AsciiIfdEntryZSHORT_ShortIfdEntryLONG _LongIfdEntryZRATIONAL_RationalIfdEntryrN _IfdEntryr)r,rDZifd_entry_classesZ field_typeZ entry_clsrrrrLs   rLcsPeZdZdZfddZeddZeddZedd Z ed d Z Z S) rUzw Base class for IFD entry classes. Subclasses are differentiated by value type, e.g. ASCII, long int, etc. cstt|||_||_dS)N)r#rUr$ _tag_code_value)rrEr=)r'rrr$sz_IfdEntry.__init__cCs>||d}||d}||d}|||||}|||S)a) Return an |_IfdEntry| subclass instance containing the tag and value of the tag parsed from *stream_rdr* at *offset*. Note this method is common to all subclasses. Override the ``_parse_value()`` method to provide distinctive behavior based on field type. rr()rNr* _parse_value)rr,rDrE value_count value_offsetr=rrrrs     z_IfdEntry.from_streamcCsdS)z Return the value of this field parsed from *stream_rdr* at *offset*. Intended to be overridden by subclasses. zUNIMPLEMENTED FIELD TYPEr)rr,rDrZr[rrrrYsz_IfdEntry._parse_valuecCs|jS)z? Short int code that identifies this IFD entry )rV)rrrrr< sz _IfdEntry.tagcCs|jS)zI Value of this tag, its type being dependent on the tag. )rW)rrrrr=sz_IfdEntry.value) rrrr r$r"rrYr!r<r=r6rr)r'rrUs     rUc@seZdZdZeddZdS)rPzE IFD entry having the form of a NULL-terminated ASCII string cCs||d|S)z Return the ASCII string parsed from *stream_rdr* at *value_offset*. The length of the string, including a terminating '' (NUL) character, is in *value_count*. r)Zread_str)rr,rDrZr[rrrrYsz_AsciiIfdEntry._parse_valueN)rrrr r"rYrrrrrPsrPc@seZdZdZeddZdS)rQz9 IFD entry expressed as a short (2-byte) integer cCs|dkr||dSdSdS)z Return the short int value contained in the *value_offset* field of this entry. Only supports single values at present. rrXz)Multi-value short integer NOT IMPLEMENTEDN)rN)rr,rDrZr[rrrrY-s z_ShortIfdEntry._parse_valueN)rrrr r"rYrrrrrQ)srQc@seZdZdZeddZdS)rSz8 IFD entry expressed as a long (4-byte) integer cCs|dkr||dSdSdS)z Return the long int value contained in the *value_offset* field of this entry. Only supports single values at present. rrXz(Multi-value long integer NOT IMPLEMENTEDN)r*)rr,rDrZr[rrrrY=s z_LongIfdEntry._parse_valueN)rrrr r"rYrrrrrS9srSc@seZdZdZeddZdS)rTz> IFD entry expressed as a numerator, denominator pair cCs.|dkr&||}||d}||SdSdS)z Return the rational (numerator / denominator) value at *value_offset* in *stream_rdr* as a floating-point number. Only supports single values at present. rr(z$Multi-value Rational NOT IMPLEMENTEDN)r*)rr,rDrZr[ numerator denominatorrrrrYMs   z_RationalIfdEntry._parse_valueN)rrrr r"rYrrrrrTIsrTN) __future__rrr constantsrrrZhelpersr r r imager r objectrr+rArLrUrPrQrSrTrrrrs $f'1