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- % Copyright (C) 1994, 1996, 1997 Aladdin Enterprises. All rights reserved.
- %
- % This file is part of Aladdin Ghostscript.
- %
- % Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- % or distributor accepts any responsibility for the consequences of using it,
- % or for whether it serves any particular purpose or works at all, unless he
- % or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- % License (the "License") for full details.
- %
- % Every copy of Aladdin Ghostscript must include a copy of the License,
- % normally in a plain ASCII text file named PUBLIC. The License grants you
- % the right to copy, modify and redistribute Aladdin Ghostscript, but only
- % under certain conditions described in the License. Among other things, the
- % License requires that the copyright notice and this notice be preserved on
- % all copies.
-
- % The current implementation of setpagedevice has the following limitations:
- % - It doesn't attempt to "interact with the user" for Policy = 2.
-
- languagelevel 1 .setlanguagelevel
- level2dict begin
-
- % ---------------- Redefinitions ---------------- %
-
- % Redefine .beginpage and .endpage so that they call BeginPage and
- % EndPage respectively if appropriate.
-
- % We have to guard against the BeginPage procedure not popping its operand.
- % This is really stupid, but the Genoa CET does it.
- /.beginpage % - .beginpage -
- { .currentshowpagecount
- { .currentpagedevice pop /BeginPage .knownget
- { % Stack: ... pagecount proc
- count 2 .execn
- % Stack: ... ..???.. oldcount
- count 1 add exch sub { pop } repeat
- }
- { pop
- }
- ifelse
- }
- if
- } bind odef
-
- % Guard similarly against EndPage not popping its operand.
- /.endpage % <reason> .endpage <print_bool>
- { .currentshowpagecount
- { 1 index .currentpagedevice pop /EndPage .knownget
- { % Stack: ... reason pagecount reason proc
- count 2 .execn
- % Stack: ... ..???.. print oldcount
- count 2 add exch sub { exch pop } repeat
- }
- { pop pop 2 ne
- }
- ifelse
- }
- { 2 ne
- }
- ifelse
- } bind odef
-
- % Define interpreter callouts for handling gstate-saving operators,
- % to make sure that they create a page device dictionary for use by
- % the corresponding gstate-restoring operator.
- % We'd really like to avoid the cost of doing this, but we don't see how.
- % The names %gsavepagedevice, %savepagedevice, %gstatepagedevice,
- % %copygstatepagedevice, and %currentgstatepagedevice are known to the
- % interpreter.
-
- (%gsavepagedevice) cvn
- { currentpagedevice pop gsave
- } bind def
-
- (%savepagedevice) cvn
- { currentpagedevice pop save
- } bind def
-
- (%gstatepagedevice) cvn
- { currentpagedevice pop gstate
- } bind def
-
- (%copygstatepagedevice) cvn
- { currentpagedevice pop copy
- } bind def
-
- (%currentgstatepagedevice) cvn
- { currentpagedevice pop currentgstate
- } bind def
-
- % Define interpreter callouts for handling gstate-restoring operators
- % when the current page device needs to be changed.
- % The names %grestorepagedevice, %grestoreallpagedevice,
- % %restorepagedevice, and %setgstatepagedevice are known to the interpreter.
-
- /.installpagedevice
- { % Since setpagedevice doesn't create new device objects,
- % we must (carefully) reinstall the old parameters in
- % the same device.
- .currentpagedevice pop null currentdevice null .trysetparams
- dup type /booleantype eq
- { pop pop }
- { % This should never happen!
- DEBUG { (Error in .trysetparams!\n) print pstack flush } if
- cleartomark pop pop pop
- /.installpagedevice cvx /rangecheck signalerror
- }
- ifelse pop pop
- erasepage initgraphics .beginpage
- } bind def
-
- /.uninstallpagedevice
- { 2 .endpage { .currentnumcopies false .outputpage } if
- nulldevice
- } bind def
-
- (%grestorepagedevice) cvn
- { .uninstallpagedevice grestore .installpagedevice
- } bind def
-
- (%grestoreallpagedevice) cvn
- { .uninstallpagedevice grestore .installpagedevice grestoreall
- } bind def
-
- (%restorepagedevice) cvn
- { .uninstallpagedevice grestore .installpagedevice restore
- } bind def
-
- (%setgstatepagedevice) cvn
- { .uninstallpagedevice setgstate .installpagedevice
- } bind def
-
- % Redefine .currentnumcopies so it consults the NumCopies device parameter.
- /.numcopiesdict mark
- /NumCopies dup
- .dicttomark readonly def
-
- /.currentnumcopies
- { currentdevice //.numcopiesdict .getdeviceparams
- dup type /integertype eq
- { exch pop exch pop }
- { cleartomark #copies }
- ifelse
- } bind odef
-
- % ---------------- Auxiliary definitions ---------------- %
-
- % Define the required attributes of all page devices, and their default values.
- % We don't include attributes such as .MediaSize, which all devices
- % are guaranteed to supply on their own.
- /.defaultpolicies mark
- /PolicyNotFound 1
- /PageSize 0
- /PolicyReport {pop} bind
- .dicttomark readonly def
- /.requiredattrs mark
- /PageOffset [0 0] readonly
- % We define InputAttributes and OutputAttributes with a single
- % dummy media type that handles pages of any size.
- % Devices that care will override this.
- /InputAttributes mark 0
- mark /PageSize [0 dup 16#7ffff dup] .dicttomark readonly
- .dicttomark readonly
- (%MediaSource) 0
- /OutputAttributes mark 0
- mark .dicttomark readonly
- .dicttomark readonly
- (%MediaDestination) 0
- /Install {.callinstall} bind
- /BeginPage {.callbeginpage} bind
- /EndPage {.callendpage} bind
- /Policies .defaultpolicies
- .dicttomark readonly def
-
- % Define currentpagedevice so it creates the dictionary on demand if needed,
- % adding all the required entries defined just above.
- % We have to deal specially with entries that the driver may change
- % on its own.
- /.dynamicppkeys mark
- /.MediaSize dup % because it changes when PageSize is set
- /PageCount dup
- .dicttomark readonly def
- /.makecurrentpagedevice % - .makecurrentpagedevice <dict>
- { currentdevice null .getdeviceparams
- % In case of duplicate keys, .dicttomark takes the entry
- % lower on the stack, so we can just append the defaults here.
- .requiredattrs { } forall .dicttomark
- dup .setpagedevice
- } bind def
- /currentpagedevice
- { .currentpagedevice
- { dup length 0 eq
- { pop .makecurrentpagedevice
- }
- { % If any of the dynamic keys have changed,
- % we must update the page device dictionary.
- currentdevice //.dynamicppkeys .getdeviceparams .dicttomark
- { % Stack: current key value
- 2 index 2 index .knownget { 1 index ne } { true } ifelse
- { 2 index wcheck not
- { % This is the first entry being updated.
- % Copy the dictionary to make it writable.
- 3 -1 roll dup length dict .copydict
- 3 1 roll
- }
- if
- 2 index 3 1 roll put
- }
- { pop pop
- }
- ifelse
- }
- forall
- % We would like to do a .setpagedevice so we don't keep
- % re-creating the dictionary. Unfortunately, the effect
- % of this is that if any dynamic key changes (PageCount
- % in particular), we will do the equivalent of a
- % setpagedevice at the next restore or grestore.
- % Therefore, we make the dictionary read-only, but
- % we don't store it away. I.e., NOT:
- % dup wcheck { .setpagedevice .currentpagedevice pop } if
- readonly
- }
- ifelse
- }
- if
- } bind odef
-
- % The implementation of setpagedevice is quite complex. Currently,
- % everything but the media matching algorithm is implemented here.
-
- % By default, we only present the requested changes to the device,
- % but there are some parameters that require special merging action.
- % Define those parameters here, with the procedures that do the merging.
- % The procedures are called as follows:
- % <merged> <key> <new_value> -proc- <merged> <key> <new_value'>
- /.mergespecial mark
- /InputAttributes
- { dup null eq
- { pop null
- }
- { 3 copy pop .knownget
- { dup null eq
- { pop dup length dict }
- { dup length 2 index length add dict .copydict }
- ifelse
- }
- { dup length dict
- }
- ifelse .copydict readonly
- }
- ifelse
- } bind
- /OutputAttributes 1 index
- /Policies
- { 3 copy pop .knownget
- { dup length 2 index length add dict .copydict }
- { dup length dict }
- ifelse copy readonly
- } bind
- .dicttomark readonly def
-
- % Define the keys used in input attribute matching.
- /.inputattrkeys [
- /PageSize /MediaColor /MediaWeight /MediaType /InsertSheet
- % The following are documented in Adobe's supplement for v2017.
- /LeadingEdge /MediaClass
- ] readonly def
- % Define other keys used in media selection.
- /.inputselectionkeys [
- /MediaPosition /Orientation
- ] readonly def
-
- % Define the keys used in output attribute matching.
- /.outputattrkeys [
- /OutputType
- ] readonly def
-
- % Define all the parameters that should always be copied to the merged
- % dictionary.
- /.copiedkeys [
- /OutputDevice
- .mergespecial { pop } forall
- .inputattrkeys aload pop
- .inputselectionkeys aload pop
- .outputattrkeys aload pop
- ] readonly def
-
- % Define the parameters that should not be presented to the device.
- % The procedures are called as follows:
- % <merged> <key> <value> -proc-
- % The procedure leaves all its operands on the stack and returns
- % true iff the key/value pair should be presented to .putdeviceparams.
- /.presentspecial mark
- .dynamicppkeys { pop false } forall
- % We must ignore an explicit request for .MediaSize,
- % because media matching always handles this.
- /.MediaSize false
- /Name false
- /OutputDevice false
- /PageOffset false
- /PageSize false % obsolete alias for .MediaSize
- /InputAttributes false
- .inputattrkeys
- { dup /PageSize eq
- { pop }
- { { 2 index /InputAttributes .knownget { null eq } { true } ifelse } }
- ifelse
- }
- forall
- .inputselectionkeys { false } forall
- /OutputAttributes false
- .outputattrkeys
- { { 2 index /OutputAttributes .knownget { null eq } { true } ifelse } }
- forall
- /Install false
- /BeginPage false
- /EndPage false
- /Policies false
- % Our extensions:
- /HWColorMap
- { % HACK: don't transmit the color map, because
- % window systems can change the color map on their own
- % incrementally. Someday we'll have a better
- % solution for this....
- false
- }
- /ViewerPreProcess false
- .dicttomark readonly def
-
- % Define access to device defaults.
- /.defaultdeviceparams
- { finddevice null .getdeviceparams
- } bind def
-
- % Select media (input or output). The hard work is done in an operator:
- % <pagedict> <attrdict> <policydict> <keys> .matchmedia <key> true
- % <pagedict> <attrdict> <policydict> <keys> .matchmedia false
- % <pagedict> null <policydict> <keys> .matchmedia null true
- /.selectmedia % <orig> <request> <merged> <failed> <-- retained
- % <attrdict> <policydict> <attrkeys> <mediakey>
- % .selectmedia
- { 5 index 5 -2 roll 4 index .matchmedia
- % Stack: orig request merged failed attrkeys mediakey
- % (key true | false)
- { 4 index 3 1 roll put pop
- }
- { % Adobe's implementations have a "big hairy heuristic"
- % to choose the set of keys to report as having failed the match.
- % For the moment, we report any keys that are in the request
- % and don't have the same value as in the original dictionary.
- 5 index 1 index .knownget
- { 4 index 3 1 roll put }
- { 3 index exch .undef }
- ifelse
- { % Stack: <orig> <request> <merged> <failed> <attrkey>
- 3 index 1 index .knownget
- { 5 index 2 index .knownget { ne } { pop true } ifelse }
- { true }
- ifelse % Stack: ... <failed> <attrkey> <report>
- { 2 copy /rangecheck put }
- if pop
- }
- forall
- }
- ifelse
- } bind def
-
- % Apply Policies to any unprocessed failed requests.
- % As we process each request entry, we replace the error name
- % in the <failed> dictionary with the policy value,
- % and we replace the key in the <merged> dictionary with its prior value
- % (or remove it if it had no prior value).
- /.policyprocs mark
- % These procedures are called with the following on the stack:
- % <orig> <merged> <failed> <Policies> <key> <policy>
- % They are expected to consume the top 2 operands.
- % NOTE: we currently treat all values other than 0, 1, or 7 (for PageSize)
- % the same as 0, i.e., we signal an error.
- 0 { % Set errorinfo and signal a configurationerror.
- pop dup 4 index exch get 2 array astore
- $error /errorinfo 3 -1 roll put
- cleartomark
- /setpagedevice load /configurationerror signalerror
- } bind
- 1 { % Roll back the failed request to its previous status.
- DEBUG { (Rolling back.\n) print pstack flush } if
- 3 index 2 index 3 -1 roll put
- 4 index 1 index .knownget
- { 4 index 3 1 roll put }
- { 3 index exch .undef }
- ifelse
- } bind
- 7 { % For PageSize only, just impose the request.
- 1 index /PageSize eq
- { pop pop 1 index /PageSize 7 put }
- { .policyprocs 0 get exec }
- ifelse
- } bind
- .dicttomark readonly def
- /.applypolicies % <orig> <merged> <failed> .applypolicies
- % <orig> <merged'> <failed'>
- { 1 index /Policies get 1 index
- { type /integertype eq
- { pop % already processed
- }
- { 2 copy .knownget not { 1 index /PolicyNotFound get } if
- % Stack: <orig> <merged> <failed> <Policies> <key>
- % <policy>
- .policyprocs 1 index .knownget not { .policyprocs 0 get } if exec
- }
- ifelse
- }
- forall pop
- } bind def
-
- % Prepare to present parameters to the device, by spreading them onto the
- % operand stack and removing any that shouldn't be presented.
- /.prepareparams % <params> .prepareparams -mark- <key1> <value1> ...
- { mark exch dup
- { % Stack: -mark- key1 value1 ... merged key value
- .presentspecial 2 index .knownget
- { exec { 3 -1 roll } { pop pop } ifelse }
- { 3 -1 roll }
- ifelse
- }
- forall pop
- } bind def
-
- % Put device parameters without resetting currentpagedevice.
- % (.putdeviceparams clears the current page device.)
- /.putdeviceparamsonly % <device> <Policies|null> <require_all> -mark-
- % <key1> <value1> ... .putdeviceparamsonly
- % On success: <device> <eraseflag>
- % On failure: <device> <Policies|null> <req_all> -mark-
- % <key1> <error1> ...
- { .currentpagedevice
- { counttomark 4 add 1 roll .putdeviceparams
- dup type /booleantype eq { 3 } { counttomark 5 add } ifelse -1 roll
- .setpagedevice
- }
- { pop .putdeviceparams
- }
- ifelse
- } bind def
-
- % Try setting the device parameters from the merged request.
- /.trysetparams % <merged> <(ignored)> <device> <Policies>
- % .trysetparams
- { true 4 index .prepareparams
- % Add the computed .MediaSize.
- % Stack: merged (ignored) device Policies -true-
- % -mark- key1 value1 ...
- counttomark 5 add index .computemediasize
- exch pop exch pop /.MediaSize exch
- DEBUG { (Putting.\n) print pstack flush } if
- .putdeviceparamsonly
- DEBUG { (Result of putting.\n) print pstack flush } if
- } bind def
-
- % Compute the media size and initial matrix from a merged request (after
- % media selection).
- /.computemediasize % <request> .computemediasize
- % <request> <matrix> <[width height]>
- { dup /PageSize get % requested page size
- 1 index /InputAttributes get
- 2 index (%MediaSource) get get /PageSize get % media size
- % (may be a range)
- 2 index /Policies get
- dup /PageSize .knownget
- { exch pop } { /PolicyNotFound get } ifelse % PageSize policy,
- % affects scaling
- 3 index /Orientation .knownget not { null } if
- 4 index /RollFedMedia .knownget not { false } if
- matrix .matchpagesize pop % (can't fail)
- 2 array astore
- } bind def
-
- % ---------------- setpagedevice itself ---------------- %
-
- /setpagedevice
- { % We mustn't pop the argument until the very end,
- % so that the pseudo-operator machinery can restore the stack
- % if an error occurs.
- mark 1 index currentpagedevice
-
- % Check whether we are changing OutputDevice;
- % also handle the case where the current device
- % is not a page device.
- % Stack: mark <request> <current>
- DEBUG { (Checking.\n) print pstack flush } if
-
- dup /OutputDevice .knownget
- { % Current device is a page device.
- 2 index /OutputDevice .knownget
- { % A specific OutputDevice was requested.
- 2 copy eq
- { pop pop null }
- { exch pop }
- ifelse
- }
- { pop null
- }
- ifelse
- }
- { % Current device is not a page device.
- % Use the default device.
- 1 index /OutputDevice .knownget not { .defaultdevicename } if
- }
- ifelse
- dup null eq
- { pop
- }
- { exch pop .defaultdeviceparams
- % In case of duplicate keys, .dicttomark takes the entry
- % lower on the stack, so we can just append the defaults here.
- .requiredattrs { } forall .dicttomark
- }
- ifelse
-
- % Check whether a viewer wants to intervene.
- % We must check both the request (which takes precedence)
- % and the current dictionary.
- % Stack: mark <request> <orig>
- exch dup /ViewerPreProcess .knownget
- { exec }
- { 1 index /ViewerPreProcess .knownget { exec } if }
- ifelse exch
-
- % Construct a merged request from the actual request plus
- % any keys that should always be propagated.
- % Stack: mark <request> <orig>
- DEBUG { (Merging.\n) print pstack flush } if
-
- exch 1 index length 1 index length add dict
- .copiedkeys
- { % Stack: <orig> <request> <merged> <key>
- 3 index 1 index .knownget { 3 copy put pop } if pop
- }
- forall
- % Stack: <orig> <request> <merged>
- dup 2 index
- { % stack: <orig> <request> <merged> <merged> <rkey> <rvalue>
- .mergespecial 2 index .knownget { exec } if
- put dup
- }
- forall pop
- % Hack: if FIXEDRESOLUTION is true, discard any attempt to
- % change HWResolution.
- FIXEDRESOLUTION { dup /HWResolution .undef } if
- % Hack: if FIXEDMEDIA is true, discard any attempt to change
- % PageSize or HWSize.
- FIXEDMEDIA
- { dup /PageSize 4 index /PageSize get put
- dup /HWSize 4 index /HWSize get put
- } if
-
- % Select input and output media.
- % Stack: mark <orig> <request> <merged>
- DEBUG { (Selecting.\n) print pstack flush } if
-
- 0 dict % <failed>
- 1 index /InputAttributes .knownget
- { 2 index /Policies get
- .inputattrkeys (%MediaSource) cvn .selectmedia
- } if
- 1 index /OutputAttributes .knownget
- { 2 index /Policies get
- .outputattrkeys (%MediaDestination) cvn .selectmedia
- } if
- 3 -1 roll 4 1 roll % temporarily swap orig & request
- .applypolicies
- 3 -1 roll 4 1 roll % swap back
-
- % Construct the new device, and attempt to set its attributes.
- % Stack: mark <orig> <request> <merged> <failed>
- DEBUG { (Constructing.\n) print pstack flush } if
-
- currentdevice .devicename 2 index /OutputDevice get eq
- { currentdevice }
- { 1 index /OutputDevice get finddevice }
- ifelse
- %**************** We should copy the device here,
- %**************** but since we can't close the old device,
- %**************** we don't. This is WRONG.
- %****************copydevice
- 2 index /Policies get
- .trysetparams
- dup type /booleantype ne
- { % The request failed.
- % Stack: ... <orig> <request> <merged> <failed> <device>
- % <Policies> true mark <name> <errorname> ...
- DEBUG { (Recovering.\n) print pstack flush } if
- counttomark 4 add index
- counttomark 2 idiv { dup 4 -2 roll put } repeat
- pop pop pop
- % Stack: mark ... <orig> <request> <merged> <failed> <device>
- % <Policies>
- 6 2 roll 3 -1 roll 4 1 roll
- .applypolicies
- 3 -1 roll 4 1 roll 6 -2 roll
- .trysetparams % shouldn't fail!
- dup type /booleantype ne
- { 2 { counttomark 1 add 1 roll cleartomark } repeat
- /setpagedevice load exch signalerror
- }
- if
- }
- if
-
- % The attempt succeeded. Install the new device.
- % Stack: mark ... <merged> <failed> <device> <eraseflag>
- DEBUG { (Installing.\n) print pstack flush } if
-
- pop 2 .endpage
- { 1 true .outputpage
- (>>setpagedevice, press <return> to continue<<\n) .confirm
- }
- if
- % .setdevice clears the current page device!
- .currentpagedevice pop exch
- .setdevice pop
- .setpagedevice
-
- % Merge the request into the current page device.
- % Stack: mark ... <merged> <failed>
- exch currentpagedevice dup length 2 index length add dict
- .copydict .copydict
- % Initialize the default matrix, taking media matching
- % into account.
- .computemediasize pop initmatrix concat
- dup /PageOffset .knownget
- { % Translate by the given number of 1/72" units in device X/Y.
- dup 0 get exch 1 get
- 2 index /HWResolution get dup 1 get exch 0 get
- 4 -1 roll mul 72 div 3 1 roll mul 72 div
- idtransform translate
- }
- if
- % We must install the new page device dictionary
- % before calling the Install procedure.
- dup .setpagedevice
- .setdefaultscreen % Set the default screen before calling Install.
- dup /Install .knownget { exec } if
- matrix currentmatrix .setdefaultmatrix
- % Erase and initialize the page.
- erasepage initgraphics
- .beginpage
-
- % Clean up, calling PolicyReport if needed.
- % Stack: mark ... <failed> <merged>
- DEBUG { (Finishing.\n) print pstack flush } if
-
- exch dup length 0 ne
- { 1 index /Policies get /PolicyReport get
- counttomark 1 add 2 roll cleartomark
- exec
- }
- { cleartomark
- }
- ifelse pop
-
- } odef
-
- end % level2dict
- .setlanguagelevel
-