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- #------------------------------------------------------------------------------
- # $File: icc,v 1.7 2021/04/26 15:56:00 christos Exp $
- # icc: file(1) magic for International Color Consortium file formats
- #
- # Color profiles as per the ICC's "Image technology colour management -
- # Architecture, profile format, and data structure" specification.
- # See
- #
- # http://www.color.org/specification/ICC1v43_2010-12.pdf
- #
- # for Specification ICC.1:2010 (Profile version 4.3.0.0).
- # URL: http://fileformats.archiveteam.org/wiki/ICC_profile
- # Reference: http://www.color.org/iccmax/ICC.2-2016-7.pdf
- # Update: Joerg Jenderek
- #
- # Bytes 36 to 39 contain a generic profile file signature of "acsp";
- # bytes 40 to 43 "may be used to identify the primary platform/operating
- # system framework for which the profile was created".
- #
- # check and display ICC/ICM color profile
- 0 name color-profile
- >36 string acsp
- # skip ASCII like Cognacspirit.txt by month <= 12
- >>26 ubeshort <13
- # platform/operating system. Only 5 mentioned
- #
- # This appears to be what's used for Apple ColorSync profiles.
- # Instead of adding that, Apple just changed the generic "acsp" entry
- # to be for "ColorSync ICC Color Profile" rather than "Kodak Color
- # Management System, ICC Profile".
- # Yes, it's "APPL", not "AAPL"; see the spec.
- >>>40 string APPL ColorSync
- # Microsoft ICM color profile
- >>>40 string MSFT Microsoft
- # Yes, that's a blank after "SGI".
- >>>40 string SGI\ SGI
- # XXX - is this what's used for the Sun KCMS or not? The standard file
- # uses just "acsp" for that, but Apple's file uses it for "ColorSync",
- # and there *is* an identified "primary platform" value of SUNW.
- >>>40 string SUNW Sun KCMS
- # 5th platform
- >>>40 string TGNT Taligent
- # remaining "l" "e" of "color profile" printed later to avoid error
- >>>40 string x color profi
- #>>>40 string x (%.4s)
- !:mime application/vnd.iccprofile
- # for "ICM" extension only versions 2.x and for Kodak "CC" 2.0 is found
- >>>8 ubyte =2
- # do not use empty message text to avoid error like
- # icc, 82: Warning: Current entry does not yet have a description for adding a EXTENSION type
- # file.exe: could not find any valid magic files!
- >>>>9 ubyte !0 \ble
- !:ext icc/icm
- # minor version
- >>>>9 ubyte =0 \bl
- # Kodak colour management system
- >>>>>4 string =KCMS \be
- !:ext icc/icm/cc
- >>>>>4 string !KCMS \be
- !:ext icc/icm
- >>>8 ubyte !2 \ble
- !:ext icc
- # Profile version major.4bit-minor.sub1.sub2 like 4.3.0.0 (04300000h)
- >>>8 ubyte x %u
- >>>9 ubyte/16 x \b.%u
- # reserved and shall be null but 205.205 in umx1220u.icm
- >>>10 ubyte >0 \b.%u
- >>>>11 ubyte >0 \b.%u
- # preferred colour management module like appl CCMS KCMS Lino UCCM "Win " "FF "
- # skip space like in brmsl08f.icm and null like in brmsl09f.icm, brmsl07f.icm
- >>>4 string >\ \b, type %.2s
- >>>>6 string >\ \b%.1s
- >>>>>7 string >\ \b%.1s
- # colour space "XYZ " "Lab " "RGB " CMYK GRAY ...
- >>>16 string x \b, %.3s
- >>>19 string >\ \b%.1s
- # Profile Connection Space (PCS) field usually "XYZ " or "Lab " but sometimes
- # null or CMYK like in ISOcoated_v2_to_PSOcoated_v3_DeviceLink.icc
- >>>20 string >\0 \b/%.3s
- >>>>23 string >\ \b%.1s
- # eleven device classes
- >>>12 string x \b-%.4s device
- # skip 00001964h in hpf69000.icc or 0h in XRDC50Q.ICM or " ROT" in brmsl05f.icm
- >>>52 string >\040
- # skip "none" model like in "Trinitron Compatible 9300K G2.2.icm"
- >>>>52 ubelong !0x6e6f6e65
- # device manufacturer field like "HP " "IBM " EPSO
- >>>>>48 string x \b, %.2s
- >>>>>50 string >\ \b%.1s
- >>>>>51 string >\ \b%.1s
- # model like "ADI " "A265" and skip 20000404h in IS330.icm for RICOH RUSSIAN-SC
- >>>>>52 string >\ \ \b/%.3s
- >>>>>>55 string >\ \b%.1s
- >>>>>52 string x model
- # creator (often same as manufacture) like HP SONY XROX or null like in A925A.icm
- >>>80 string >\0 by %.2s
- >>>>82 string >\ \b%.1s
- >>>>>83 string >\ \b%.1s
- # profile size
- >>>0 ubelong x \b, %u bytes
- # skip invalid date 0 like in linearSRGB.icc
- >>>24 ubequad !0
- # datetime dd-mm-yyyy hh:mm:ss
- >>>>28 ubeshort x \b, %u
- # month <= 12
- >>>>26 ubeshort x \b-%u
- # year
- >>>>24 ubeshort x \b-%u
- # do not display midnight time like in CNHP8308.ICC
- >>>>30 ubequad&0xFFffFFffFFff0000 !0
- # hour <= 24
- >>>>>30 ubeshort x %u
- # minutes <= 59
- >>>>>32 ubeshort x \b:%.2u
- # seconds <= 59
- >>>>>34 ubeshort x \b:%.2u
- # vendor specific flags like 2 in HPCLJ5.ICM
- >>>44 ubeshort >0 \b, %#x vendor flags
- # profile flags bits 0-2 of least 16 used by ICC
- #>>>44 ubelong >0 \b, %#x flags
- # icEmbeddedProfileTrue
- >>>44 ubelong &1 \b, embedded
- # icEmbeddedProfileFalse
- #>>>44 ubelong ^1 \b, not embedded
- # icUseWithEmbeddedDataOnly
- >>>44 ubelong &2 \b, dependently
- # icUseAnywhere
- #>>>44 ubelong ^2 \b, independently
- >>>44 ubelong &4 \b, MCS
- #>>>44 ubelong ^4 \b, no MCS
- # vendor specific device attributes 1~srgb.icc
- # E000D00h~CNB7QEDA.ICM C000A00h~CNB5FCAA.ICM 01040401h~CNB25PE3.ICM
- >>>56 ubelong >0 \b, %#x vendor attribute
- # ICC device attributes bits 0-7 used
- #>>>60 ubelong x \b, %#x attribute
- # http://www.color.org/icc34.h
- >>>60 ubelong &0x01 \b, transparent
- #>>>60 ubelong ^0x01 \b, reflective
- >>>60 ubelong &0x02 \b, matte
- #>>>60 ubelong ^0x02 \b, glossy
- >>>60 ubelong &0x04 \b, negative
- #>>>60 ubelong ^0x04 \b, positive
- >>>60 ubelong &0x08 \b, black&white
- #>>>60 ubelong ^0x08 \b, colour
- >>>60 ubelong &0x10 \b, non-paper
- #>>>60 ubelong ^0x10 \b, paper
- >>>60 ubelong &0x20 \b, non-textured
- #>>>60 ubelong ^0x20 \b, textured
- >>>60 ubelong &0x40 \b, non-isotropic
- #>>>60 ubelong ^0x40 \b, isotropic
- >>>60 ubelong &0x80 \b, self-luminous
- #>>>60 ubelong ^0x80 \b, non-self-luminous
- # rendering intent 0-3 but 7AEA5027h in EE051__1.ICM 6CB1BCh in EE061__1.ICM
- >>>64 ubelong >3 \b, %#x rendering intent
- #>>>64 ubelong =0 \b, perceptual
- >>>64 ubelong =1 \b, relative colorimetric
- >>>64 ubelong =2 \b, saturation
- >>>64 ubelong =3 \b, absolute colorimetric
- # PCS illuminant (3*s15Fixed16Numbers) often 0000f6d6 00010000 0000d32d
- >>>71 ubequad !0xd6000100000000d3 \b, PCS
- # usually X~0.9642*65536=63189.8112~63190=F6D5h ; but also found
- # often F6D6 in gt5000r.icm, F6B8 in kodakce.icm, F6CA in RSWOP.icm
- >>>>68 ubelong !0x0000f6d5 X=%#x
- # usually Y=1.0~00010000h but Y=0 in brmsl07f.icm
- >>>>72 ubelong !0x00010000 Y=%#x
- # usually Z~0.8249*65536=54060.6464~54061=D32Dh ; but also found
- # D2F7 in hp1200c.icm, often D32C in A925A.icm, D309 in RSWOP.icm , D2F8 in kodak_dc.icm
- >>>>76 ubelong !0x0000d32d Z=%#x
- # Profile ID. MD5 fingerprinting method as defined in Internet RFC 1321.
- >>>84 ubequad >0 \b, %#llx MD5
- # reserved in older versions should be zero but also found CDCDCDCDCDCDCDCD
- #>>100 ubequad x \b %#llx reserved
- # tag table
- # 6 <= tags count <= 43
- #>>>128 ubelong >43 \b, %u tags
- >>>128 ubelong x
- # shall contain the profileDescriptionTag "desc" , copyrightTag "cprt"
- # search range = tags count * 12 -8=< maximal tag count * 12 -8= 43 * 12 -8= 508
- >>>>132 search/508 cprt
- # but no copyright tag in linearSRGB.icc
- # beneath /System/Library/Frameworks/WebKit.framework/
- # Versions/A/Frameworks/WebCore.framework/Versions/A/Resources
- >>>>132 default x \b, no copyright tag
- # 1st tag
- #>>>132 string x \b, 1st tag %.4s
- #>>>136 ubelong x %#x offset
- #>>>140 ubelong x %#x len
- # 2nd tag,...
- # look also for profileDescriptionTag "desc"
- >>>132 search/508 desc
- # look further for TextDescriptionType "desc" signature
- >>>>(&0.L) string =desc
- >>>>>&4 pstring/l x "%s"
- # look alternative for multiLocalizedUnicodeType "mluc" signature like in VideoPAL.icc
- >>>>(&0.L) string =mluc
- >>>>>&(&8.L) ubequad x
- >>>>>>&4 bestring16 x '%s'
- # Any other profile.
- # XXX - should we use "acsp\0\0\0\0" for "no primary platform" profiles,
- # and use "acsp" for everything else and dump the "primary platform"
- # string in those cases?
- 36 string acsp
- >0 use color-profile
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