101 lines
18 KiB
Plaintext
101 lines
18 KiB
Plaintext
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ß¼jG8 ã óÈ — d dl mZ d dlZd dlZd dlZd dlmZ ddlmZm Z m
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Z
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m Z dZ e r d dl
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mZ d dlmZ G d „ d
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« Zdd „Zdd „Z dd
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„Z G d„ de j « Zdd„Zdd„Z ej. ej0 ee« ej2 ej0 e« ej4 ej0 g d¢« ej6 ej0 d« y)é )Ú annotationsN)Úcasté )ÚImageÚ ImageFileÚ ImagePaletteÚ_binaryF)ÚCallable)ÚIOc óJ — e Zd ZdZd
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d d„Zd d„Zd
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d„Zdd„Zdd„Zdd„Z dd„Z
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y )Ú BoxReaderz}
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A small helper class to read fields stored in JPEG2000 header boxes
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and to easily step into and read sub-boxes.
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c óB — || _ |dk\ | _ || _ d| _ y )Nr éÿÿÿÿ)ÚfpÚ
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has_lengthÚlengthÚremaining_in_box)Úselfr r s úX/home/antigravity/intellecton/venv/lib/python3.12/site-packages/PIL/Jpeg2KImagePlugin.pyÚ__init__zBoxReader.__init__% s# € ؈ŒØ A™+ˆŒØ ˆŒ Ø "ˆÕ ó c ó® — | j r+| j j « |z | j kD ry| j dk\ r|| j k S y)NFr T)r r Útellr r )r Ú num_bytess r Ú _can_readzBoxReader._can_read+ sH € Ø �?Š?˜tŸw™wŸ|™|›~° Ñ 9¸D¿K¹KÒ GàØ × Ñ AÒ %à × 5Ñ 5Ñ5Ð 5àr c ó — | j |« s
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d}t |« ‚| j j |« }t |« |k r d|› dt |« › d�}t |« ‚| j dkD r| xj |z c_ |S )NzNot enough data in headerzExpected to read z bytes but only got ú.r )r Ú SyntaxErrorr ÚreadÚlenÚOSErrorr )r r ÚmsgÚdatas r Ú _read_byteszBoxReader._read_bytes5 sƒ € Ø�~‰~˜iÔ(Ø-ˆCÜ ˜cÓ"Ð "à�w‰w�|‰|˜IÓ&ˆÜ ˆt‹9�yÒ Ø% i [Ð0DÄSÈÃYÀKÈqÐQˆCܘ#“,Ð à × Ñ 1Ò $Ø × !Ò ! YÑ .Õ !؈ r c óz — t j |« }| j |« }t j ||« S ©N)ÚstructÚcalcsizer$ Úunpack)r Ú field_formatÚsizer# s r Ú read_fieldszBoxReader.read_fieldsC s1 € Ü�‰˜|Ó,ˆØ× Ñ Ó%ˆÜ�}‰}˜\¨4Ó0Ð0r c óz — | j }| j |« }t t j |« |« S r& )r r$ r
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ÚioÚBytesIO)r r+ r# s r Ú
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read_boxeszBoxReader.read_boxesH s3 € Ø×$Ñ$ˆØ× Ñ Ó%ˆÜœŸ™ DÓ)¨4Ó0Ð0r c ó„ — | j r4| j j « | j z | j k S y)NT)r r r r r )r s r Ú has_next_boxzBoxReader.has_next_boxM s0 € Ø �?Š?Ø—7‘7—<‘<“> D×$9Ñ$9Ñ9¸D¿K¹KÑGÐ Gàr c ó° — | j dkD r4| j j | j t j « d| _ t t t t f | j d« « \ }}|dk( r%t t | j d« d « }d}nd}||k s| j ||z
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« s
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d}t |« ‚||z
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| _ |S ) Nr r z>I4sr z>Qé é zInvalid header length) r r ÚseekÚosÚSEEK_CURr ÚtupleÚintÚbytesr, r r )r ÚlboxÚtboxÚhlenr" s r Ú
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next_box_typezBoxReader.next_box_typeS s¾ € à × Ñ 1Ò $Ø �G‰G�L‰L˜×.Ñ.´· ± Ô <Ø "ˆÔ ô œ%¤¤U
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Ñ+¨T×-=Ñ-=¸fÓ-EÓF‰
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ˆˆdØ �1Š9Üœ˜T× -Ñ -¨dÓ 3°AÑ 6Ó7ˆD؉DàˆDà �$Š;˜dŸn™n¨T°D©[Ô 9Ø)ˆCÜ ˜cÓ"Ð "à $ t¡ ˆÔ ؈ r N)r )r ú IO[bytes]r r: ÚreturnÚNone)r r: rA Úbool)r r: rA r; )r* ÚstrrA ztuple[int | bytes, ...])rA r
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)rA rC )rA r; ) Ú__name__Ú
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c óœ — | j d« }t j |« }|| j |dz
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fS |
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dk( rd }
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fS |
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d k( rd
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fS d}t |« ‚)z‹Parse the JPEG 2000 codestream to extract the size and component
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count from the SIZ marker segment, returning a PIL (size, mode) tuple.é z >HHIIIIIIIIHr z>Bé& r é r5 úI;16ÚLÚLAé ÚRGBé ÚRGBAz"unable to determine J2K image mode)r r Úi16ber' Ú unpack_fromr )r ÚhdrÚlsizÚsizÚrsizÚxsizÚysizÚxosizÚyosizÚ_Úcsizr+ ÚssizÚmoder" s r Ú_parse_codestreamrc i s* € ð
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�'‰'�!‹*€CÜ �=‰=˜Ó €DØ
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�5‰L˜$ ™,Ð '€DØ ˆq‚yÜ×!Ñ! $¨¨RÓ0ˆØ �‰G�d‰N˜aÑ !Ò #؈Dð �ˆ:Ðð ˆDð �ˆ:Ðð
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�ŠØˆð �ˆ:Ðð
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�ŠØˆð �ˆ:Ðð
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�ŠØˆð
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�ˆ:Ðð 3ˆÜ˜#Ó Ð r c ó0 — |dk( ryd| z d|z z d|z z S )zµConvert JPEG2000's (numerator, denominator, exponent-base-10) resolution,
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calculated as (num / denom) * 10^exp and stored in dots per meter,
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to floating-point dots per inch.r Néþ é
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i' rI )ÚnumÚdenomÚexps r Ú _res_to_dpirj ˆ s* € ð
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�‚zØØ �#‰I˜˜S™Ñ ! e¨e¡mÑ 4Ð4r c óh — t | « }d}d}|j « rU|j « }|dk( r|j « }n/|dk( r|j d« d dk( rd}|j « rŒU|€J ‚d}d}d}d}d} d}
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d} |j « �r|j « }|dk( r†|j d « \ } }
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k( �r6|dv rd} �n.|dk( r d} |dk( �r!d}�n |dk( �rd} �n|d k( �r|d v �r| d v�r|j d « \ }}t |t « sJ ‚t |t « sJ ‚d}|j d d!|z z « D ] }t |t « sJ ‚||kD sŒ|}Œ |d k �r�|dk( r
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t |« D ]] }g }|j d d!|z z « D ]% }t |t « sJ ‚|j |« Œ' |
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d'}#t |#« ‚|||| |
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fS )(zªParse the JP2 header box to extract size, component count,
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color space information, and optionally DPI information,
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returning a (size, mode, mimetype, dpi) tuple.Ns jp2hs ftypz>4sr s jpx z image/jpxs ihdrz>IIHBr rM r5 rN rO rK rP rQ rR rS rT s colrz>BBBI)r é Ú1é ÚCMYKé s pclr)rO rP )rm rO z>HBú>ÚBÚPÚPAs res s rescz>HHHHBBzMalformed JP2 header)r
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r2 r? r0 r, Ú
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isinstancer: r ÚrangeÚappendÚgetcolorr9 rj r )$r ÚreaderÚheaderÚmimetyper= r+ rb ÚbpcÚncÚdpiÚpaletteÚcolrÚheightÚwidthÚmethr_ ÚenumcsÚneÚnpcÚ max_bitdepthÚbitdepthÚ palette_modeÚiÚcolorÚvalueÚresÚtresÚvrcnÚvrcdÚhrcnÚhrcdÚvrceÚhrceÚhresÚvresr" s$ r Ú_parse_jp2_headerr— ‘ s' € ô �r‹]€FØ
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