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Edit File: gs_cidcm.ps
% Copyright (C) 2001-2021 Artifex Software, Inc. % All Rights Reserved. % % This software is provided AS-IS with no warranty, either express or % implied. % % This software is distributed under license and may not be copied, % modified or distributed except as expressly authorized under the terms % of the license contained in the file LICENSE in this distribution. % % Refer to licensing information at http://www.artifex.com or contact % Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, % CA 94945, U.S.A., +1(415)492-9861, for further information. % % Extending Font resource category with CIDFont-CMap fonts. languagelevel 2 .setlanguagelevel currentglobal //true setglobal % In the comments below, 'CSI' is an abbreviation/acronym for CIDSystemInfo. % We pre-scan resource files to retrieve the CSI from them. % First we define a hidden procset .prs_dict containing % necessary variables and procedures. % Then we redefine the old /Font category using this procset. % We maintain internal caches for the CSI values retrieved from % resource files. This supposes that document doesn't uninstall % resource files. To disable caching, set enable_cache to false. % We assume that names starting with '.prs' do not appear in resource files. % If this causes any problem, this prefix should be systematically changed % in this file. ('prs' is an abbreviation for 'prescan'.) 25 dict begin % Define local variables : /.prs_dict currentdict def % self-reference (constant) /.prs_empty 0 dict readonly def /path_buffer 8192 string def /name_buffer 1024 string def /minus (-) 0 get def % character code constant for '-' /period (.) 0 get def % character code constant for '.' /CMap 10 dict def % CSI cache for CMaps /CIDFont 10 dict def % CSI cache for CIDFonts /enable_cache //true def % set false to disable cache % The folloving variables are just placeholders for ones to be set % dynamically : /.prsFile 0 def % file to prescan /.prsResult 0 def % result of prescan /.prsDictCount 0 def % save the dictionary stack depth % Define a dummy CIDInit procset to use while pre-scanning : /DummyCIDInit 15 dict begin /begincmap {} def /usecmap {pop} bind def {stop} bind [ /begincodespacerange /endcodespacerange /beginnotdefchar /endnotdefchar /beginnotdefrange /endnotdefrange /begincidchar /endcidchar /begincidrange /endcidrange /endcmap /usefont /StartData ] { 1 index def } bind forall pop currentdict end def % Define a local 'findresource' for pre-scanning : % (it returns the dummy CIDInit instead of the regular CIDInit ProcSet) /findresource { % <InstName> <CatName> findresource <inst> 2 copy /ProcSet eq exch % /InstName /CatName bool /InstName /CIDInit eq and { pop pop //DummyCIDInit } { //findresource exec } ifelse } bind def % Define procedures for pre-scanning : /StopIfCSIDefined { % - StopIfCSIDefined - % Check if the dictionary stack contains a dictionary containing /CIDSystemInfo. % The search is limited to the top .prsDictCount dictionaries in the stack. % If so, retrieve the CSI, and execute stop to terminate the pre-scanning of the file. % Otherwise, do nothing, so the pre-scanning continues. countdictstack //.prs_dict /.prsDictCount get sub dup { currentdict /CIDSystemInfo .knownget { //.prs_dict exch /.prsResult exch put stop } if currentdict exch end } repeat { begin } repeat } bind def /PrescanFile { % - PrescanFile - { //.prs_dict /.prsFile get token { dup type % token type dup /nametype eq exch /operatortype eq or { dup xcheck { exec //StopIfCSIDefined exec } if } if } { stop } ifelse } loop } bind odef /GetCIDSystemInfoFromFile { % <file> GetCIDSystemInfoFromFile <CSI> % This procedure reads resource files with 'token', % executing the tokens untill /CIDSystemInfo appears to be defined. % Normally the resource file creates a new dictionary on % dictionary stack and defines /CIDSystemInfo in it. % % Returns an empty dictionary if no CIDSystemInfo is found. RESMPDEBUG { (cidcm GetCIDSystemInfoFromFile beg) = } if //.prs_dict begin /.prsFile exch def /.prsResult //.prs_empty def /.prsDictCount countdictstack def RESMPDEBUG { (cidcm GetCIDSystemInfoFromFile will PrescanFile.) = } if { //PrescanFile } stopped pop //.prs_dict /.prsResult get end RESMPDEBUG { (cidcm GetCIDSystemInfoFromFile end) = } if } bind def /GetCIDSystemInfo { % <InstName> <CatName> GetCIDSystemInfo <CSI> % Retrieve CSI, using caches. RESMPDEBUG { (cidcm GetCIDSystemInfo beg) = } if /Category findresource begin % /InstName dup ResourceStatus { pop 2 lt { FindResource /CIDSystemInfo .knownget not { //.prs_empty } if % CSI } { % /InstName currentdict /GetCIDSystemInfoFromMap .knownget { exec } if dup type /nametype eq { RESMPDEBUG { (cidcm GetCIDSystemInfo got a name.) = } if //.prs_dict Category get % /InstName CSIs dup 2 index known //enable_cache and { RESMPDEBUG { (cidcm GetCIDSystemInfo from cache.) = } if exch get % CSI } { RESMPDEBUG { (cidcm GetCIDSystemInfo from file.) = } if exch % CSIs /InstName dup //path_buffer ResourceFileName % CSIs /InstName (path) RESMPDEBUG { (cidcm GetCIDSystemInfo from file ) print dup = } if currentglobal exch //true setglobal % CSIs /InstName g (path) mark exch % CSIs /InstName g [ (path) { (r) file } stopped { cleartomark //.prs_empty } { exch 1 index % CSIs /InstName g file [ file //GetCIDSystemInfoFromFile stopped { cleartomark closefile //.prs_empty } { exch pop exch closefile } ifelse } ifelse % CSIs /InstName g CSI exch setglobal % CSIs /InstName CSI dup 4 1 roll % CSI CSIs /InstName CSI put % CSI RESMPDEBUG { (cidcm GetCIDSystemInfo got from file : <<) print dup { exch //=string cvs print ( ) print //=string cvs print ( ) print } forall (>>) = } if } ifelse } if } ifelse } { pop //.prs_empty } ifelse end RESMPDEBUG { (cidcm GetCIDSystemInfo end) = } if } bind def /IsCompatibleCSI { % <CSI-M> <CSI-F> IsCompatibleCSI <bool> % The CSI in a CIDFont may be an array, a dict, or null. % If it is an array, it must be of 1 element, which is a dict. % In this case the dict is used for testing the compatibility. % Two dicts are compatible iff they contain same /Ordering and /Registry. % Identity CMap is compatible with any CIDFont. exch % CSI-F CSI-M { dup type /arraytype eq { dup length 1 ne { pop pop //false exit } if 0 get } if % CSI-F CSI-M dup type /dicttype ne { pop pop //false exit } if % CSI-F <<CSI-M>> exch % <<CSI-M>> CSI-F dup type /dicttype ne { pop pop //false exit } if % <<CSI-M>> <<CSI-F>> dup /Ordering .knownget { /Identity eq { pop pop //true exit } if } if //true % <<CSI-M>> <<CSI-F>> bEQ [/Registry /Ordering] { 2 index 1 index .knownget not { 1234567 } if % <<CSI-M>> <<CSI-F>> bEQ /key vF exch % <<CSI-M>> <<CSI-F>> bEQ vF /key 4 index exch .knownget not { 7654321 } if % <<CSI-M>> <<CSI-F>> bEQ vF vM eq and % <<CSI-M>> <<CSI-F>> bEQ } forall exch pop exch pop % bEQ exit } loop } bind def /IsWellComposed { % <CIDFontName> <CMapName> IsWellComposed <bool> % Check if the given CIDFont and CMap have compatible CSIs. exch % /CMapName /CIDFontName /CIDFont //GetCIDSystemInfo exec % /CMapName CSI-F dup type /dicttype eq { dup length 0 ne { exch % CSI-F /CMapName /CMap //GetCIDSystemInfo exec % CSI-F CSI-M //IsCompatibleCSI exec % bool } { pop pop //false } ifelse } { pop pop //false } ifelse } bind def /IsComposedFont { % <FontName> IsComposedFont <CIDFontName> <CMapName> true % <FontName> IsComposedFont false % Check if the given font name may be decomposed into CIDFont.CMap, CIDFont-CMap % or into CIDFont--CMap, such that CIDFont and CMap have compatible CSIs. % FontName dup type /stringtype ne { //name_buffer cvs } if % (FontName) { dup length 2 sub -1 1 { % (FontName) i 2 copy get dup //minus eq exch //period eq or { 2 copy 2 copy % (FontName) i (FontName) i (FontName) i 2 copy get //minus eq { 2 copy 1 sub get //minus eq { 1 sub } if } if % (FontName) i (FontName) i (FontName) i0 0 exch getinterval cvn % (FontName) i (FontName) i /CIDFontName 3 1 roll % (FontName) i /CIDFontName (FontName) i 1 add dup % (FontName) i /CIDFontName (FontName) i1 i1 5 index length % (FontName) i /CIDFontName (FontName) i1 i1 l exch sub getinterval cvn % (FontName) i /CIDFontName /CMapName 2 copy //IsWellComposed exec { % (FontName) i /CIDFontName /CMapName 4 2 roll pop pop % /CIDFontName /CMapName stop } if pop pop pop } { pop } ifelse % (FontName) } for pop } stopped } bind def /ComposeName { % <CIDFont> <CMap> <scr> ComposeName <CIDFont-CMap> dup dup 5 2 roll % (scr) (scr) /CIDFont /CMap (scr) 3 2 roll exch cvs length dup % (scr) (scr) /CMap l0 l0 4 -1 roll exch //minus put % (scr) /CMap l0 1 add dup % (scr) /CMap l1 l1 3 index dup length % (scr) /CMap l1 l1 (scr) L 2 index sub % (scr) /CMap l1 l1 (scr) LT 3 2 roll % (scr) /CMap l1 (scr) LT l1 exch getinterval % (scr) /CMap l1 (scrT) 3 2 roll exch cvs length % (scr) l1 l2 add 0 exch getinterval % (CIDFont-CMap) } bind def % Redefine the /Font category with CIDFont-CMap construction : % The following code supposes that the following names are not % defined in the old /Font category dictionary : % /IsComposedFont, /IsWellComposed . /Font /Category findresource dup length dict copy begin /FindResource { % <InstName> FindResource <inst> dup //ResourceStatus exec { pop pop //FindResource exec } { dup //IsComposedFont exec { % /FontName /CIDFontName /CMapName exch [ exch ] composefont % inst } { //FindResource exec } ifelse } ifelse } bind executeonly def /ResourceStatus { % <InstName> ResourceStatus <nStatus> <nSize> true % <InstName> ResourceStatus false dup //ResourceStatus exec { 3 2 roll pop //true % nStatus nSize true } { //IsComposedFont exec { % /CIDFontName /CMapName /CMap resourcestatus { % /CIDFontName nStatusM nSizeM exch pop exch % nSizeM /CIDFontName /CIDFont resourcestatus { % nSizeM nStatusF nSizeF exch pop % nSizeF nSizeM dup 0 ge { exch dup 0 ge { add } { exch pop } ifelse } { pop } ifelse % nSize 2 exch //true % nStatus nSize true } { pop pop pop //false % work around buggy resource file } ifelse } { pop pop pop //false % work around buggy resource file } ifelse } { //false } ifelse } ifelse } bind executeonly def /ResourceForAll { % <template> <proc> <scratch> ResourceForAll - % We suppose that the resourceforall procedure does not % define or install new fonts, CMaps, and/or CIDFonts. % First we create 3 temporary dictionaries to store temporary data % about fonts, CMaps and CIDFonts. % These dictionaries must be created dynamically, to allow for a possible % recursive call to resourceforall from the resourceforall procedure. currentglobal //false setglobal 20 dict 20 dict 20 dict % (templ) proc (scr) g <<CIDFont>> <<CMap>> <<Fonts>> % Store resource identifiers into local dictionaries % A resource instance can have a key that is not a name or a string. In this % case, resourceforall passes the key directly to proc instead of copying it % into the scratch string. This case can arise only for a resource instance % defined in virtual memory by a previous defineresource % Discard non-string keys of CIDFont and CMap because <CIDFontName>-<CMapName> % is only defined for names. { /.DisableResourceOrdering pop % gs_resmp accesses this through execstack - don't remove ! 6 index [ 2 index {exch //null put} aload pop ] cvx bind 6 index //ResourceForAll exec (*) [ 3 index {exch dup type /stringtype eq { cvn dup put } { pop pop } ifelse } aload pop ] cvx bind 6 index /CMap resourceforall (*) [ 4 index {exch dup type /stringtype eq { cvn dup put } { pop pop } ifelse } aload pop ] cvx bind 6 index /CIDFont resourceforall exit } loop % This loop is a pattern for execstack_lookup - don't remove ! 4 -1 roll setglobal % (templ) proc (scr) <<CIDFont>> <<CMap>> <<Fonts>> %% Make the list of fonts in the form (/Name status) : % (templ) proc (scr) <<CIDFont>> <<CMap>> <<Fonts>> dup { pop dup //ResourceStatus exec { pop 2 index % (templ) proc (scr) <<CIDFont>> <<CMap>> <<Fonts>> /Name nStatus <<Font>> 3 1 roll put % (templ) proc (scr) <<CIDFont>> <<CMap>> <<Fonts>> } { pop } ifelse } forall % (templ) proc (scr) <<CIDFont>> <<CMap>> <<Fonts>> %% Add CIDFont-CMap to it (filtering duplicates) : 3 2 roll { 3 index { 3 1 roll % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont /CMap /CIDFont /CMap 6 index //ComposeName exec % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont /CMap (Font) dup 8 index .stringmatch { cvn % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont /CMap /Font dup 4 index exch known { pop pop } { 2 index % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont /CMap /Font /CIDFont 4 2 roll % (templ) proc (scr) <<CMap>> <<Font>> /Font /CIDFont /CIDFont /CMap //IsWellComposed exec { exch 2 index exch 2 put % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont } { exch pop } ifelse } ifelse } { pop pop } ifelse dup % (templ) proc (scr) <<CMap>> <<Font>> /CIDFont /CIDFont } forall pop pop % (templ) proc (scr) <<CMap>> <<Font>> } forall % (templ) proc (scr) <<CMap>> <<Font>> exch pop % (templ) proc (scr) <<Font>> 4 3 roll pop % proc (scr) <<Font>> % Make the enumerator and apply it : /MappedCategoryRedefiner /ProcSet findresource /MakeResourceEnumerator get exec exec } bind executeonly def currentdict end /Font exch /Category defineresource pop end setglobal .setlanguagelevel