# $File: icc,v 1.7 2021/04/26 15:56:00 christos Exp $

#------------------------------------------------------------------------------
# $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