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Diffstat (limited to 'Master/tlpkg/tlgs/Resource/Init/gs_dps.ps')
-rw-r--r-- | Master/tlpkg/tlgs/Resource/Init/gs_dps.ps | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/Master/tlpkg/tlgs/Resource/Init/gs_dps.ps b/Master/tlpkg/tlgs/Resource/Init/gs_dps.ps deleted file mode 100644 index 00c14d53204..00000000000 --- a/Master/tlpkg/tlgs/Resource/Init/gs_dps.ps +++ /dev/null @@ -1,222 +0,0 @@ -% Copyright (C) 2001-2018 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. -% - -% Initialization file for Display PostScript functions. - -% ------ Errors ------ % - -% These errors are only defined in DPS. -{ /invalidcontext /invalidid } { .registererror } forall - -% ------ Contexts ------ % - -% To create a context with private local VM, we use the .localfork -% operator to actually create the context, the new VM, and an empty -% userdict, and then we call the .initlocaldicts procedure to make -% local copies of the initial contents of the dictionaries in local VM. -% savedlocaldicts in systemdict is a global read-only dictionary whose -% elements are global read-only copies of these initial contents; -% we just copy its elements into local VM and install them in systemdict. -% userdict and internaldict require special handling. - -% Switching between contexts with different local VMs requires -% changing the bindings in systemdict that reference local objects. -% For this purpose, each userdict has an entry called localdicts -% which holds the local copies of the elements of savedlocaldicts, -% plus internaldict. The context switching code in the interpreter -% effectively copies this dictionary into systemdict. -% NOTE: the name localdicts is known to the interpreter. - -% Switching between contexts also requires resetting the user parameters. -% The interpreter records the value of userparams (a local dictionary -% referenced from systemdict) for each context, and uses it for this. -% See gs_lev2.ps for more details. -% NOTE: the name userparams is known to the interpreter. - -% Save copies of local dictionaries at the end of system initialization. -% Also save the initial gstate. -/.savelocalstate { - .currentglobal //true .setglobal - //systemdict /savedlocaldicts mark //systemdict { - dup gcheck { - pop pop - } { - dup type /dicttype eq { - % Save a copy of this dictionary in global VM. - dup maxlength dict .copydict readonly - } { - pop pop - } ifelse - } ifelse - } forall .dicttomark readonly put - % Create localdicts for the current context. - //false .setglobal - userdict /localdicts mark savedlocaldicts { - pop dup load - } forall /internaldict dup load - .dicttomark readonly put - % Save a copy of the initial gstate. - //systemdict /savedinitialgstate gstate readonly .forceput - .setglobal -} .bind executeonly odef % must be bound and hidden for .forceput - -% Initialize local dictionaries and gstate when creating a new context. -% Note that until this completes, we are in the anomalous situation of -% having systemdict point to dictionaries that are in a non-current -% local VM. Because of this, we turn off garbage collection temporarily. -/.copylocal { % <name> <dict> .copylocal <name> <dict'> - % Copy a dictionary to the current (local) VM, - % and make it read-only if its current definition is. - dup maxlength dict .copydict - 1 index load wcheck not { readonly } if -} .bind def -% When this is called, the dictionary stack is in its initial state, -% and there is (anomalously) only one gstate on the gstate stack. -/.initlocaldicts { % - .initlocaldicts - - -2 vmreclaim - .currentglobal //systemdict begin - //false .setglobal - % Since localdicts doesn't exist yet, references from - % systemdict to local objects won't get restored if - % a context switch happens in this code. Therefore, - % until localdicts is defined, we have to keep all our - % state on the operand stack. - - % Acquire userdict. - %****** WRONG IF NON-STANDARD INITIAL DSTACK ****** - countdictstack array dictstack - { dup gcheck not { exit } if pop } forall - % Create localdicts with a local copy of each dictionary, - % except for userdict and userparams, which just need - % to be filled in. - mark savedlocaldicts { - 1 index /userdict eq { - % Stack: userdict mark ... /userdict inituserdict - counttomark 1 add index .copydict - } { - 1 index /userparams eq { - % Stack: userdict mark ... /userparams inituserparams - userparams .copydict - } { - .copylocal - } ifelse - } ifelse - } forall /internaldict dup .makeinternaldict .makeoperator - .dicttomark readonly /localdicts exch put - % localdicts is now defined in userdict. - % Copy the definitions into systemdict. - localdicts { .forcedef } forall - % Set the user parameters. - userparams readonly .setuserparams - % Establish the initial gstate(s). - /savedinitialgstate .systemvar setgstate gsave - % Wrap up. - end .setglobal -} bind executeonly odef - -% Check whether an object is a procedure. -/.proccheck { % <obj> .proccheck <bool> - dup xcheck - exch type dup /arraytype eq exch /packedarraytype eq or and -} bind def - -% Create a context with private local VM. -% The .localfork operator does all the work, but we must ensure that -% .initlocaldicts gets called when the new context starts up. -/localfork { % <mark> <obj1> ... <objN> <proc> - % <stdin|null> <stdout|null> - % localfork <context> - .currentglobal //true .setglobal 3 index - dup .proccheck not { - pop .setglobal /localfork .systemvar /typecheck signalerror - } if - {exec .initlocaldicts} aload pop - 3 1 roll 3 packedarray cvx - 4 1 roll 5 -1 roll pop .setglobal .localfork -} odef - -% Fork a context that shares VM. The .fork operator creates an empty -% userparams dictionary for the context, but we still need to initialize -% this dictionary when the new context starts up. -/.postfork { % - .postfork - - % Initialize the user parameters. - savedlocaldicts /userparams get userparams .copydict readonly pop -} odef -/fork { % <mark> <obj1> ... <objN> <proc> fork <context> - .currentglobal //false .setglobal 1 index - dup .proccheck not { - pop .setglobal /fork .systemvar /typecheck signalerror - } if - {exec .postfork} aload pop - 3 1 roll 3 packedarray cvx - 3 1 roll exch pop .setglobal .fork -} odef - -% ------ Halftone phase ------ % - -/sethalftonephase { % <x> <y> sethalftonephase - - -1 2 index 2 index .setscreenphase pop pop -} odef -/currenthalftonephase { % - currenthalftonephase <x> <y> - 0 .currentscreenphase -} odef - -% ------ Device-source images ------ */ - -.imagetypes 2 /.image2 load put - -% ------ Device information ------ % - -/.deviceinfodict mark - /Colors //null /GrayValues //null /RedValues //null /GreenValues //null - /BlueValues //null /ColorValues //null -.dicttomark readonly def -/deviceinfo { % - deviceinfo <dict> - currentdevice //.deviceinfodict .getdeviceparams .dicttomark - dup begin - /ColorValues .knownget { - 0 le - { currentdict /ColorValues undef } - { - % hack around devices that incorrect set GrayValues - Colors 3 eq { 1 } { GrayValues } ifelse - RedValues mul GreenValues mul BlueValues mul ColorValues ne - { currentdict /GrayValues undef - currentdict /RedValues undef - currentdict /GreenValues undef - currentdict /BlueValues undef - } if - } - ifelse - } if - currentdict end readonly -} odef - -% The current implementation allocates a 2-element array each time. -% Perhaps we should change this to 2 separate parameters for X and Y? -/.wtdict mark - /wtranslation //null -.dicttomark readonly def -/wtranslation { % - wtranslation <x> <y> - currentdevice //.wtdict .getdeviceparams exch pop exch pop aload pop -} odef -currentdict /.wtdict .undef - -% ------ View clipping ------ % - -/rectviewclip { % <x> <y> <width> <height> rectviewclip - - % <numarray|numstring> rectviewclip - - newpath .rectappend viewclip -} odef |