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gs_pdfwr.ps
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2000-03-09
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% Copyright (C) 1996, 1997, 1998, 1999 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.
% $Id: gs_pdfwr.ps,v 1.1 2000/03/09 08:40:40 lpd Exp $
% PDF writer additions to systemdict.
% This file should be included iff the pdfwrite "device" is included
% in the executable.
% Redefine pdfmark to pass the data to the driver.
% We use a pseudo-parameter named /pdfmark whose value is an array:
% key1 value1 ... CTM /type
/.pdf===dict mark
/arraytype
{ dup xcheck { ({) (}) } { ([) (]) } ifelse
% Stack: file obj left right
4 1 roll 2 index exch writestring () exch
{ exch 2 index exch writestring
1 index exch pdfmark===only ( )
}
forall pop exch writestring
} bind
/packedarraytype 1 index
/dicttype
{ 1 index (<<\n) writestring
{ 2 index 3 -1 roll pdfmark===only 1 index ( ) writestring
1 index exch pdfmark===only dup (\n) writestring
}
forall (>>) writestring
} bind
.dicttomark readonly def
/pdfmark===only { % <file> <obj> pdfmark===only -
.pdf===dict 1 index type .knownget { exec } { write===only } ifelse
} bind def
/.pdfcvbuf 10 string def % enough for most arguments
userdict /.pdfcvstring () put
/.pdfcvs { % <obj> .pdfcvs <string>
currentglobal exch false .setglobal
/.pdfcvstring () store
% We can't handle long values yet.
{ pop dup length 0 eq { pop } {
/.pdfcvstring .pdfcvstring 3 -1 roll concatstrings store
} ifelse //.pdfcvbuf
} /NullEncode filter dup 3 -1 roll pdfmark===only
closefile
.setglobal .pdfcvstring
} bind def
/.pdfputparams { % -mark- <key1> <value1> ... .pdfputparams <result...>
currentdevice null false counttomark 1 add 3 roll
% Don't allow the page device to get cleared....
{.putdeviceparams} .currentpagedevice pop {.setpagedevice} 3 .execn
} bind def
% Convert relevant operands to strings in an array.
/.pdfcvsloop { % -mark- values ... markname start step .pdfcvsloop
% [values ... ctm markname]
matrix currentmatrix .pdfcvs 4 1 roll
counttomark 1 add 2 roll ] 3 1 roll
% Stack: values start step
2 index length 3 sub { 2 copy 2 copy get .pdfcvs put pop } for
} bind def
/.pdfcvsall { % -mark- values ... markname .pdfcvsall <<same>>
0 1 .pdfcvsloop
} bind def
/.pdfcvseven { % -mark- key value ... markname .pdfcvseven <<same>>
1 2 .pdfcvsloop
} bind def
/.pdfcvsnone { % -mark- values ... markname .pdfcvsnone <<same>>
100000 1 .pdfcvsloop
} bind def
/.pdfcvsfirst { % -mark- first values ... markname .pdfcvsfirst<<same>>
.pdfcvsnone
dup 0 2 copy get .pdfcvs put
} bind def
% The procedures in the following dictionary are called with the entire
% pdfmark operand list (including the pdfmark name) on the stack;
% they may modify this ad lib. They must call .pdfcvsxxx.
/.pdfmarkparams mark
% Unpack a dictionary for PUT, and don't convert stream data.
/PUT {
counttomark 3 eq {
1 index type /dicttype eq {
pop { } forall /.PUTDICT .pdfcvsall
} {
pop dup type /filetype eq {
% Read the file into a sequence of strings.
% This isn't great, but it's simple.
{
dup 1000 string readstring not { exch exit } if
exch
} loop closefile
} if
/.PUTSTREAM .pdfcvsfirst
} ifelse
} {
.pdfcvsall
} ifelse
} bind
% Unpack the array for PUTINTERVAL.
/PUTINTERVAL {
pop aload pop /.PUTINTERVAL .pdfcvsall
} bind
.dicttomark readonly def
/.pdfparamerror { % ? ? ? -mark- ... <errname> <opname> .pdfparamerror -
counttomark 4 add 2 roll cleartomark pop pop pop
.systemvar exch signalerror
} bind def
/pdfmark { % -mark- <key> <value> ... <markname> pdfmark -
counttomark 1 add copy
//.pdfmarkparams 1 index .knownget { exec } { .pdfcvsall } ifelse
mark /pdfmark 3 -1 roll .pdfputparams
dup type /booleantype ne {
/pdfmark .pdfparamerror
} if cleartomark
} odef
userdict /pdfmark .undef
currentdict /.pdfmarkparams .undef
% Define setdistillerparams / currentdistillerparams.
% Distiller parameters are currently treated as device parameters.
/.distillerparamkeys mark
% General parameters -- all distillers
% ****** NOTE: StartPage and EndPage are disabled because
% ****** EndPage clashes with a page device parameter.
/ASCII85EncodePages { }
/AutoRotatePages { }
/Binding { }
/CompressPages { }
/DefaultRenderingIntent { }
/DetectBlends { }
/DoThumbnails { }
% /EndPage { }
/ImageMemory { }
/LockDistillerParams { }
/LZWEncodePages { }
/OPM { }
/PreserveHalftoneInfo { }
/PreserveOPIComments { }
/PreserveOverprintSettings { }
% /StartPage { }
/TransferFunctionInfo { }
/UCRandBGInfo { }
/UseFlateCompression { }
% General parameters -- PDF writer
/CoreDistVersion { }
/CompatibilityLevel { }
/Optimize { }
/ParseDSCCommentsForDocInfo { }
/ParseDSCComments { }
/EmitDSCWarnings { }
/CreateJobTicket { }
/PreserveEPSInfo { }
/AutoPositionEPSFile { }
/PreserveCopyPage { }
/UsePrologue { }
% Color sampled image parameters
/ColorACSDict { }
/AntiAliasColorImages { }
/AutoFilterColorImages { }
/ColorImageDepth { }
/ColorImageDict { }
/DownsampleColorImages { }
/ColorImageDownsampleThreshold { }
/ColorImageDownsampleType { }
/EncodeColorImages { }
/ColorImageFilter { }
/ColorImageResolution { }
% Color processing parameters
/CalCMYKProfile { }
/CalGrayProfile { }
/CalRGBProfile { }
/sRGBProfile { }
/ColorConversionStrategy { }
/ConvertCMYKImagesToRGB { }
/ConvertImagesToIndexed { }
% Grayscale sampled image parameters
/GrayACSDict { }
/AntiAliasGrayImages { }
/AutoFilterGrayImages { }
/GrayImageDepth { }
/GrayImageDict { }
/DownsampleGrayImages { }
/GrayImageDownsampleThreshold { }
/GrayImageDownsampleType { }
/EncodeGrayImages { }
/GrayImageFilter { }
/GrayImageResolution { }
% Monochrome sampled image parameters
/AntiAliasMonoImages { }
/MonoImageDepth { }
/MonoImageDict { }
/DownsampleMonoImages { }
/MonoImageDownsampleThreshold { }
/MonoImageDownsampleType { }
/EncodeMonoImages { }
/MonoImageFilter { }
/MonoImageResolution { }
% Font embedding parameters
/AlwaysEmbed
{ dup length 0 gt
{ dup 0 get false eq
{ dup length 1 sub 1 exch getinterval exch pop /~AlwaysEmbed exch
} if
} if
}
/NeverEmbed
{ dup length 0 gt
{ dup 0 get false eq
{ dup length 1 sub 1 exch getinterval exch pop /~NeverEmbed exch
} if
} if
}
/CannotEmbedFontPolicy { }
/EmbedAllFonts { }
/MaxSubsetPct { }
/SubsetFonts { }
.dicttomark readonly def
/.distillerdevice
{ currentdevice .devicename /pdfwrite eq
{ currentdevice }
{ /pdfwrite finddevice }
ifelse
} bind def
/setdistillerparams { % <dict> setdistillerparams -
.distillerdevice null false mark 4 index {
//.distillerparamkeys 2 index .knownget { exec } { pop pop } ifelse
} forall .putdeviceparams
dup type /booleantype ne {
/setdistillerparams .pdfparamerror
} {
pop pop pop
} ifelse
} odef
/currentdistillerparams % - currentdistillerparams <dict>
{ .distillerdevice //.distillerparamkeys .getdeviceparams .dicttomark
} odef
% Patch 'where' so that the distillerparams operators are only visible
% if the pdfwrite device is the current one, for the benefit of badly
% designed PostScript files that "know" they have to do something different
% if a distiller is processing them.
.wheredict /currentdistillerparams {
currentdevice .devicename /pdfwrite eq {
.where
} {
.where pop dup //systemdict eq { pop false } { true } ifelse
} ifelse
} bind put
.wheredict /setdistillerparams .wheredict /currentdistillerparams get put