o j(@sddlmZmZmZddlmZmZmZddlm Z Gddde Z GdddZ Gdd d Z Gd d d Z d d ZGdddZGdddeZGdddeZGdddeZGdddeZdS)) MIME_TYPETIFF_FLDTIFF_TAG) BIG_ENDIAN LITTLE_ENDIAN StreamReader)BaseImageHeaderc@s4eZdZdZeddZeddZeddZdS) Tiffz`Image header parser for TIFF images. Handles both big and little endian byte ordering. cCstjS)z[Return the MIME type of this TIFF image, unconditionally the string ``image/tiff``.)rZTIFFselfr P/var/www/html/Deteccion_Ine/venv/lib/python3.10/site-packages/docx/image/tiff.py content_type szTiff.content_typecCdS)z:Default filename extension, always 'tiff' for TIFF images.Ztiffr r r r r default_extszTiff.default_extcCs0t|}|j}|j}|j}|j}|||||S)zYReturn a |Tiff| instance containing the properties of the TIFF image in `stream`.) _TiffParserparsepx_width px_heighthorz_dpivert_dpi)clsstreamparserrrrrr r r from_streams zTiff.from_streamN) __name__ __module__ __qualname____doc__propertyrr classmethodrr r r r r s  r cs|eZdZdZfddZeddZeddZedd Z ed d Z ed d Z eddZ ddZ eddZZS)rzkParses a TIFF image stream to extract the image properties found in its main image file directory (IFD)ctt|||_dSN)superr__init__ _ifd_entries)r ifd_entries __class__r r r$) z_TiffParser.__init__cCs(||}|d}t||}||S)zmReturn an instance of |_TiffParser| containing the properties parsed from the TIFF image in `stream`.)_make_stream_reader read_long _IfdEntriesr)rr stream_rdrZ ifd0_offsetr&r r r r-s   z_TiffParser.parsecC |tjS)zThe horizontal dots per inch value calculated from the XResolution and ResolutionUnit tags of the IFD; defaults to 72 if those tags are not present.)_dpirZ X_RESOLUTIONr r r r r6 z_TiffParser.horz_dpicCr/)zThe vertical dots per inch value calculated from the XResolution and ResolutionUnit tags of the IFD; defaults to 72 if those tags are not present.)r0rZ Y_RESOLUTIONr r r r r<r1z_TiffParser.vert_dpicC|jtjS)zThe number of stacked rows of pixels in the image, |None| if the IFD contains no ``ImageLength`` tag, the expected case when the TIFF is embeded in an Exif image.)r%getrZ IMAGE_LENGTHr r r r rBz_TiffParser.px_heightcCr2)zThe number of pixels in each row in the image, |None| if the IFD contains no ``ImageWidth`` tag, the expected case when the TIFF is embeded in an Exif image.)r%r3rZ IMAGE_WIDTHr r r r rIr4z_TiffParser.px_widthcCs$|d|d}|dkrtStS)zReturn either BIG_ENDIAN or LITTLE_ENDIAN depending on the endian indicator found in the TIFF `stream` header, either 'MM' or 'II'.sMM)seekreadrr)rrZ endian_strr r r _detect_endianPs  z_TiffParser._detect_endiancCsT|j}||vr dS|tjd}|dkrdS|dkrdnd}||}tt||S)a!Return the dpi value calculated for `resolution_tag`, which can be either TIFF_TAG.X_RESOLUTION or TIFF_TAG.Y_RESOLUTION. The calculation is based on the values of both that tag and the TIFF_TAG.RESOLUTION_UNIT tag in this parser's |_IfdEntries| instance. Hr6rgRQ@)r%r3rZRESOLUTION_UNITintround)r Zresolution_tagr&Zresolution_unitZunits_per_inchZ dots_per_unitr r r r0Xsz_TiffParser._dpicCs||}t||S)zReturn a |StreamReader| instance with wrapping `stream` and having "endian- ness" determined by the 'MM' or 'II' indicator in the TIFF stream header.)r9r)rrZendianr r r r+ns  z_TiffParser._make_stream_reader)rrrrr$r rrrrrrr9r0r+ __classcell__r r r'r r%s$       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.cr!r")r#r-r$_entries)r entriesr'r r r$zr)z_IfdEntries.__init__cC |j|S)z5Provides ``in`` operator, e.g. ``tag in ifd_entries``)r> __contains__r keyr r r rA~ z_IfdEntries.__contains__cCr@)zCProvides indexed access, e.g. ``tag_value = ifd_entries[tag_code]``)r> __getitem__rBr r r rErDz_IfdEntries.__getitem__cCs$t||}dd|D}||S)zVReturn a new |_IfdEntries| instance parsed from `stream` starting at `offset`.cSsi|]}|j|jqSr )tagvalue).0er r r sz+_IfdEntries.from_stream..) _IfdParser iter_entries)rroffsetZ ifd_parserr?r r r rs z_IfdEntries.from_streamNcCs|j||S)zhReturn value of IFD entry having tag matching `tag_code`, or `default` if no matching tag found.)r>r3)r tag_codedefaultr r r r3z_IfdEntries.getr") rrrrr$rArEr rr3r=r r r'r r-vs  r-cs4eZdZdZfddZddZeddZZS)rKzaService object that knows how to extract directory entries from an Image File Directory (IFD)ctt|||_||_dSr")r#rKr$ _stream_rdr_offset)r r.rMr'r r r$ z_IfdParser.__init__ccs:t|jD]}|jd|d}t|j|}|VqdS)zVGenerate an |_IfdEntry| instance corresponding to each entry in the directory.r6 N)range _entry_countrS_IfdEntryFactoryrR)r idxZdir_entry_offsetZ ifd_entryr r r rLs  z_IfdParser.iter_entriescCs|j|jS)zDThe count of directory entries, read from the top of the IFD header.)rR read_shortrSr r r r rWrPz_IfdParser._entry_count) rrrrr$rLrrWr=r r r'r rKs  rKcCs@tjttjttjttjti}| |d}| |t }| ||S)ztReturn an |_IfdEntry| subclass instance containing the value of the directory entry at `offset` in `stream_rdr`.r6) rASCII_AsciiIfdEntryZSHORT_ShortIfdEntryLONG _LongIfdEntryZRATIONAL_RationalIfdEntryrZr3 _IfdEntryr)r.rMZifd_entry_classesZ field_typeZEntryClsr r r rXs   rXcsPeZdZdZfddZeddZeddZedd Z ed d Z Z S) razsBase class for IFD entry classes. Subclasses are differentiated by value type, e.g. ASCII, long int, etc. crQr")r#rar$ _tag_code_value)r rNrGr'r r r$rTz_IfdEntry.__init__cCs>||d}||d}||d}|||||}|||S)a!Return an |_IfdEntry| subclass instance containing the tag and value of the tag parsed from `stream_rdr` at `offset`. Note this method is common to all subclasses. Override the ``_parse_value()`` method to provide distinctive behavior based on field type. r5r*)rZr, _parse_value)rr.rMrN value_count value_offsetrGr r r rs    z_IfdEntry.from_streamcCr)zReturn the value of this field parsed from `stream_rdr` at `offset`. Intended to be overridden by subclasses. zUNIMPLEMENTED FIELD TYPEr rr.rMrfrgr r r resz_IfdEntry._parse_valuecC|jS)z.Short int code that identifies this IFD entry.)rbr r r r rFz _IfdEntry.tagcCri)z7Value of this tag, its type being dependent on the tag.)rcr r r r rGrjz_IfdEntry.value) rrrrr$r rrerrFrGr=r r r'r ras    rac@eZdZdZeddZdS)r\zs Q,