% Copyright (C) 1990, 1996, 1997, 1998, 2000 Aladdin Enterprises. 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.% % For more information about licensing, please refer to% http://www.ghostscript.com/licensing/. For information on% commercial licensing, go to http://www.artifex.com/licensing/ or% contact Artifex Software, Inc., 101 Lucas Valley Road #110,% San Rafael, CA 94903, U.S.A., +1(415)492-9861.% $Id: gs_dps2.ps,v 1.5 2002/02/21 21:49:28 giles Exp $% Initialization file for basic Display PostScript functions% that are also included in Level 2.level2dict begin% ------ Halftones ------ %/.makestackdict { { counttomark -1 roll } forall .dicttomark } bind def/currenthalftone % - currenthalftone <dict> { mark .currenthalftone { { exch pop } % halftone { /HalftoneType 1 % screen { /Frequency /Angle /SpotFunction } .makestackdict } { /HalftoneType 2 % colorscreen { /RedFrequency /RedAngle /RedSpotFunction /GreenFrequency /GreenAngle /GreenSpotFunction /BlueFrequency /BlueAngle /BlueSpotFunction /GrayFrequency /GrayAngle /GraySpotFunction } .makestackdict } } exch get exec } odef% Define sethalftone so it converts types 1-4 to type 5./.makehalftoneRGBV { % <dict> <type> <keys> <keysRGBV> 4 -1 roll exch { 1 index exch get exch } forall 15 1 roll 14 -2 roll mark 15 1 roll { /Gray /Blue /Green /Red } { % stack: v0 v1 v2 type keys comp mark 2 index 0 get 8 -1 roll 4 index 1 get 9 -1 roll 6 index 2 get 10 -1 roll % stack: type keys comp mark k0 v0 k1 v1 k2 v2 /HalftoneType 10 index .dicttomark counttomark 2 roll } forall pop pop /Default 1 index .dicttomark exch pop { .sethalftone5 }} bind def% The value of each entry in .halftonetypes is a procedure:% <setdict> <htdict> <<proc>> <setdict'> <htdict'> <sethalftoneproc>% This allows us to use these procedures both for actually implementing% sethalftone and for converting subsidiary dictionaries of HalftoneType 5% halftones.systemdict begin15 dict /.halftonetypes 1 index def begin 1 { mark exch /Default exch .dicttomark { .sethalftone5 } } bind def 2 { 1 { /Frequency /Angle /SpotFunction } { /RedFrequency /RedAngle /RedSpotFunction /GreenFrequency /GreenAngle /GreenSpotFunction /BlueFrequency /BlueAngle /BlueSpotFunction /GrayFrequency /GrayAngle /GraySpotFunction } .makehalftoneRGBV } bind def 3 { mark exch /Default exch .dicttomark { .sethalftone5 } } bind def 4 { 3 { /Width /Height /Thresholds } { /RedWidth /RedHeight /RedThresholds /GreenWidth /GreenHeight /GreenThresholds /BlueWidth /BlueHeight /BlueThresholds /GrayWidth /GrayHeight /GrayThresholds } .makehalftoneRGBV } bind def 5 { pop dup length dict copy mark 1 index { % Even HalftoneType 5 dictionaries have entries other than % subsidiary halftone dictionaries. dup type /dicttype ne { 0 } { dup /HalftoneType .knownget not { 0 } if } ifelse dup 5 gt { % Stack: dict mark ... keyN dictN httypeN % Assume that all HalftoneTypes > 5 convert to 5. 1 index 3 1 roll //.halftonetypes exch get exec pop /Default get % Stack: dict mark ... keyN setdict'N htdict'N counttomark 1 add index 3 index 4 -1 roll put } { pop } ifelse } forall .dicttomark { .sethalftone5 } } bind defendend/sethalftone { % <dict> sethalftone - % We must create the new dictionary in the same VM as the % operand; otherwise, invalidaccess errors may occur. .currentglobal 1 index dup gcheck .setglobal dup //.halftonetypes 1 index /HalftoneType get get exec exec .setglobal pop} odef% Redefine setscreen and setcolorscreen to recognize halftone dictionaries,% and to insert the Frequency and Angle into Type 1 halftones, per% Adobe TN 5085./.fixsethalftonescreen % <freq> <angle> <dict> .fix...screen % <freq> <angle> <dict> <dict'> { dup dup /HalftoneType get 1 eq { dup wcheck not { dup length .copydict } if dup /Frequency 5 index put dup /Angle 4 index put } if } bind def/setscreen % <ignore*2> <dict> setscreen - { dup type /dicttype eq { .fixsethalftonescreen sethalftone pop pop pop } { //setscreen } ifelse } odef/setcolorscreen % <ignore*11> <dict> setcolorscreen - { dup type /dicttype eq { .fixsethalftonescreen sethalftone 12 { pop } repeat } { //setcolorscreen } ifelse } odef% Redefine currentscreen and currentcolorscreen to extract the Frequency% and Angle from Type 1 halftones, per Adobe TN 5085./.fixcurrenthalftonescreen % <dict> .fix... <freq> <angle> <proc> { dup /HalftoneType get 1 eq { dup /Frequency get 1 index /Angle get } { 60 0 } ifelse 3 2 roll } bind def/currentscreen % - currentscreen 60 0 <dict> { .currenthalftone { { .fixcurrenthalftonescreen } % halftone { } % screen { 12 3 roll 9 { pop } repeat % colorscreen dup type /dicttype eq { .fixcurrenthalftonescreen } if } } exch get exec } odef/currentcolorscreen % - currentcolorscreen (60 0 <dict>)*4 { .currenthalftone { { .fixcurrenthalftonescreen 3 copy 6 copy } % halftone { 3 copy 6 copy } % screen { } % colorscreen } exch get exec } odef% ------ User objects ------ %/.UserObjects { .userdict /UserObjects} odef% In order to get proper error recovery behavior, we need to be careful% not to pop any operands from the stack until we're done.% The code below faithfully duplicates the apparent array-growing% behavior of Adobe interpreters./defineuserobject { % <index> <value> defineuserobject - .UserObjects .knownget { length dup 3 index le { % Stack: index value len 2 index eq { 1 index 2 mul } { 1 index 1 add } ifelse .localvmarray .UserObjects get 1 index copy pop .UserObjects 3 -1 roll put } { pop } ifelse } { .UserObjects 3 index 1 add 10 .max .localvmarray put } ifelse .UserObjects get 2 index 2 index put pop pop} odef/execuserobject { % <index> execuserobject - .UserObjects get 1 index get exch pop exec} odef/undefineuserobject { % <index> undefineuserobject - .UserObjects get 1 index null put pop} odef% ------ Cache control ------ %% Dummy definitions for cache control operators/ucachestatus { % - ucachestatus -mark- ? ? ? ? <size> mark 0 0 0 0 .userdict /.ucachesize .knownget not { 0 } if} odef/setucacheparams { % -mark- ... <size> setucacheparams - % Provoke an appropriate error if needed. counttomark 1 lt { () 0 get } if 0 or .userdict /.ucachesize 2 index 0 .max put cleartomark} odefend % level2dict
% Copyright (C) 1990, 1996, 1997, 1998, 2000 Aladdin Enterprises. 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.
%
% For more information about licensing, please refer to
% http://www.ghostscript.com/licensing/. For information on
% commercial licensing, go to http://www.artifex.com/licensing/ or
% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
% $Id: gs_dps2.ps,v 1.5 2002/02/21 21:49:28 giles Exp $
% Initialization file for basic Display PostScript functions
% that are also included in Level 2.
level2dict begin
% ------ Halftones ------ %
/.makestackdict
{ { counttomark -1 roll } forall .dicttomark
} bind def
/currenthalftone % - currenthalftone <dict>
{ mark .currenthalftone
{ { exch pop } % halftone
{ /HalftoneType 1 % screen
{ /Frequency /Angle /SpotFunction }
.makestackdict
}
{ /HalftoneType 2 % colorscreen
{ /RedFrequency /RedAngle /RedSpotFunction
/GreenFrequency /GreenAngle /GreenSpotFunction
/BlueFrequency /BlueAngle /BlueSpotFunction
/GrayFrequency /GrayAngle /GraySpotFunction
}
.makestackdict
}
}
exch get exec
} odef
% Define sethalftone so it converts types 1-4 to type 5.
/.makehalftoneRGBV { % <dict> <type> <keys> <keysRGBV>
4 -1 roll exch { 1 index exch get exch } forall 15 1 roll
14 -2 roll mark 15 1 roll { /Gray /Blue /Green /Red } {
% stack: v0 v1 v2 type keys comp
mark
2 index 0 get 8 -1 roll
4 index 1 get 9 -1 roll
6 index 2 get 10 -1 roll
% stack: type keys comp mark k0 v0 k1 v1 k2 v2
/HalftoneType 10 index .dicttomark
counttomark 2 roll
} forall pop pop
/Default 1 index .dicttomark exch pop { .sethalftone5 }
} bind def
% The value of each entry in .halftonetypes is a procedure:
% <setdict> <htdict> <<proc>> <setdict'> <htdict'> <sethalftoneproc>
% This allows us to use these procedures both for actually implementing
% sethalftone and for converting subsidiary dictionaries of HalftoneType 5
% halftones.
systemdict begin
15 dict /.halftonetypes 1 index def begin
1 {
mark exch /Default exch .dicttomark { .sethalftone5 }
} bind def
2 {
1 { /Frequency /Angle /SpotFunction } {
/RedFrequency /RedAngle /RedSpotFunction
/GreenFrequency /GreenAngle /GreenSpotFunction
/BlueFrequency /BlueAngle /BlueSpotFunction
/GrayFrequency /GrayAngle /GraySpotFunction
} .makehalftoneRGBV
} bind def
3 {
mark exch /Default exch .dicttomark { .sethalftone5 }
} bind def
4 {
3 { /Width /Height /Thresholds } {
/RedWidth /RedHeight /RedThresholds
/GreenWidth /GreenHeight /GreenThresholds
/BlueWidth /BlueHeight /BlueThresholds
/GrayWidth /GrayHeight /GrayThresholds
} .makehalftoneRGBV
} bind def
5 {
pop dup length dict copy
mark 1 index {
% Even HalftoneType 5 dictionaries have entries other than
% subsidiary halftone dictionaries.
dup type /dicttype ne {
0
} {
dup /HalftoneType .knownget not { 0 } if
} ifelse dup 5 gt {
% Stack: dict mark ... keyN dictN httypeN
% Assume that all HalftoneTypes > 5 convert to 5.
1 index 3 1 roll
//.halftonetypes exch get exec pop /Default get
% Stack: dict mark ... keyN setdict'N htdict'N
counttomark 1 add index 3 index 4 -1 roll put
} {
pop
} ifelse
} forall .dicttomark { .sethalftone5 }
} bind def
end
end
/sethalftone { % <dict> sethalftone -
% We must create the new dictionary in the same VM as the
% operand; otherwise, invalidaccess errors may occur.
.currentglobal 1 index dup gcheck .setglobal
dup //.halftonetypes 1 index /HalftoneType get get exec exec
.setglobal pop
} odef
% Redefine setscreen and setcolorscreen to recognize halftone dictionaries,
% and to insert the Frequency and Angle into Type 1 halftones, per
% Adobe TN 5085.
/.fixsethalftonescreen % <freq> <angle> <dict> .fix...screen
% <freq> <angle> <dict> <dict'>
{ dup dup /HalftoneType get 1 eq
{ dup wcheck not { dup length .copydict } if
dup /Frequency 5 index put
dup /Angle 4 index put
}
if
} bind def
/setscreen % <ignore*2> <dict> setscreen -
{ dup type /dicttype eq
{ .fixsethalftonescreen sethalftone pop pop pop }
{ //setscreen }
ifelse
} odef
/setcolorscreen % <ignore*11> <dict> setcolorscreen -
{ dup type /dicttype eq
{ .fixsethalftonescreen sethalftone 12 { pop } repeat }
{ //setcolorscreen }
ifelse
} odef
% Redefine currentscreen and currentcolorscreen to extract the Frequency
% and Angle from Type 1 halftones, per Adobe TN 5085.
/.fixcurrenthalftonescreen % <dict> .fix... <freq> <angle> <proc>
{ dup /HalftoneType get 1 eq
{ dup /Frequency get 1 index /Angle get }
{ 60 0 }
ifelse 3 2 roll
} bind def
/currentscreen % - currentscreen 60 0 <dict>
{ .currenthalftone
{ { .fixcurrenthalftonescreen } % halftone
{ } % screen
{ 12 3 roll 9 { pop } repeat % colorscreen
dup type /dicttype eq { .fixcurrenthalftonescreen } if
}
}
exch get exec
} odef
/currentcolorscreen % - currentcolorscreen (60 0 <dict>)*4
{ .currenthalftone
{ { .fixcurrenthalftonescreen 3 copy 6 copy } % halftone
{ 3 copy 6 copy } % screen
{ } % colorscreen
}
exch get exec
} odef
% ------ User objects ------ %
/.UserObjects {
.userdict /UserObjects
} odef
% In order to get proper error recovery behavior, we need to be careful
% not to pop any operands from the stack until we're done.
% The code below faithfully duplicates the apparent array-growing
% behavior of Adobe interpreters.
/defineuserobject { % <index> <value> defineuserobject -
.UserObjects .knownget {
length dup 3 index le {
% Stack: index value len
2 index eq { 1 index 2 mul } { 1 index 1 add } ifelse
.localvmarray .UserObjects get
1 index copy pop
.UserObjects 3 -1 roll put
} {
pop
} ifelse
} {
.UserObjects 3 index 1 add 10 .max .localvmarray put
} ifelse
.UserObjects get 2 index 2 index put pop pop
} odef
/execuserobject { % <index> execuserobject -
.UserObjects get 1 index get exch pop exec
} odef
/undefineuserobject { % <index> undefineuserobject -
.UserObjects get 1 index null put pop
} odef
% ------ Cache control ------ %
% Dummy definitions for cache control operators
/ucachestatus { % - ucachestatus -mark- ? ? ? ? <size>
mark 0 0 0 0 .userdict /.ucachesize .knownget not { 0 } if
} odef
/setucacheparams { % -mark- ... <size> setucacheparams -
% Provoke an appropriate error if needed.
counttomark 1 lt { () 0 get } if
0 or .userdict /.ucachesize 2 index 0 .max put cleartomark
} odef
end % level2dict