o h(@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``.)rTIFFselfr O/var/www/html/premium_crap/venv/lib/python3.10/site-packages/docx/image/tiff.py content_type szTiff.content_typecCdS)z:Default filename extension, always 'tiff' for TIFF images.tiffr 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 rr 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 rr&) 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_rdr ifd0_offsetr(r r rr-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.)_dpir X_RESOLUTIONr r r rr6 z_TiffParser.horz_dpicCr2)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.)r3r Y_RESOLUTIONr r r rr<r5z_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'getr IMAGE_LENGTHr r r rrBz_TiffParser.px_heightcCr7)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'r8r IMAGE_WIDTHr r r rrIr:z_TiffParser.px_widthcCs$|d|d}|dkrtStS)zReturn either BIG_ENDIAN or LITTLE_ENDIAN depending on the endian indicator found in the TIFF `stream` header, either 'MM' or 'II'.sMM)seekreadrr)rr endian_strr r r_detect_endianPs  z_TiffParser._detect_endiancCsT|j}||vr dS|tjd}|dkrdS|dkrdnd}||}tt||S)a!Return the dpi value calculated for `resolution_tag`, which can be either TIFF_TAG.X_RESOLUTION or TIFF_TAG.Y_RESOLUTION. 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Hr=rgRQ@)r'r8rRESOLUTION_UNITintround)r resolution_tagr(resolution_unitunits_per_inch dots_per_unitr r rr3Xsz_TiffParser._dpicCs||}t||S)zReturn a |StreamReader| instance with wrapping `stream` and having "endian- ness" determined by the 'MM' or 'II' indicator in the TIFF stream header.)rAr)rrendianr r rr-ns  z_TiffParser._make_stream_reader)rrrr r&r"rr!rrrrrAr3r- __classcell__r r r)rr%s$       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.cr#r$)r%r/r&_entries)r entriesr)r rr&zr+z_IfdEntries.__init__cC |j|S)z5Provides ``in`` operator, e.g. ``tag in ifd_entries``)rL __contains__r keyr r rrO~ z_IfdEntries.__contains__cCrN)zCProvides indexed access, e.g. ``tag_value = ifd_entries[tag_code]``)rL __getitem__rPr r rrSrRz_IfdEntries.__getitem__cCs$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)rroffset ifd_parserrMr r rrs z_IfdEntries.from_streamNcCs|j||S)zhReturn value of IFD entry having tag matching `tag_code`, or `default` if no matching tag found.)rLr8)r tag_codedefaultr r rr8z_IfdEntries.getr$) rrrr r&rOrSr"rr8rKr r r)rr/vs  r/cs4eZdZdZfddZddZeddZZS)rYzaService object that knows how to extract directory entries from an Image File Directory (IFD)ctt|||_||_dSr$)r%rYr& _stream_rdr_offset)r r0r[r)r rr& z_IfdParser.__init__ccs:t|jD]}|jd|d}t|j|}|VqdS)zVGenerate an |_IfdEntry| instance corresponding to each entry in the directory.r= N)range _entry_countrb_IfdEntryFactoryra)r idxdir_entry_offset ifd_entryr r rrZs  z_IfdParser.iter_entriescCs|j|jS)zDThe count of directory entries, read from the top of the IFD header.)ra read_shortrbr r r rrfr_z_IfdParser._entry_count) rrrr r&rZr!rfrKr r r)rrYs  rYcCs@tjttjttjttjti}| |d}| |t }| ||S)ztReturn an |_IfdEntry| subclass instance containing the value of the directory entry at `offset` in `stream_rdr`.r=) rASCII_AsciiIfdEntrySHORT_ShortIfdEntryLONG _LongIfdEntryRATIONAL_RationalIfdEntryrkr8 _IfdEntryr)r0r[ifd_entry_classes field_typeEntryClsr r rrgs   rgcsPeZdZdZfddZeddZeddZedd Z ed d Z Z S) rtzsBase class for IFD entry classes. Subclasses are differentiated by value type, e.g. ASCII, long int, etc. cr`r$)r%rtr& _tag_code_value)r r]rUr)r rr&rcz_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. r<r,)rkr. _parse_value)rr0r[r] value_count value_offsetrUr r rrs    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 rr0r[r|r}r r rr{sz_IfdEntry._parse_valuecC|jS)z.Short int code that identifies this IFD entry.)rxr r r rrTz _IfdEntry.tagcCr)z7Value of this tag, its type being dependent on the tag.)ryr r r rrUrz_IfdEntry.value) rrrr r&r"rr{r!rTrUrKr r r)rrts    rtc@eZdZdZeddZdS)rmzs Q,