Edit File: gs_epsf.ps
% 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. % % Allow the interpreter to encapsulate EPS files, to recognize MS-DOS % EPSF file headers, and skip to the PostScript section of the file. % Encapsulate EPS files and optionally resize page or rescale image. % To display an EPS file cropped to the bounding box: % gs -dEPSCrop file.eps % To display an EPS file scaled to fit the page: % gs -dEPSFitPage file.eps % To display a file without EPS encapsulation: % gs -dNOEPS file.ps % When starting to process an EPS file, state is 0. % After %%BoundingBox processed, state is 1 if OK or 2 if cropped. % After %%HiResBoundingBox processed, state is 3 if OK or 4 if cropped. % After %%EndComments processed, state is 5. /EPSBoundingBoxState 5 def /EPSBoundingBoxSetState { //systemdict /EPSBoundingBoxState 3 -1 roll .forceput } .bind executeonly odef % .forceput must be bound and hidden % Parse 4 numbers for a bounding box /EPSBoundingBoxParse { % (llx lly urx ury) -- llx lly urx ury true OR false mark exch token {exch token {exch token {exch token {exch pop} if} if} if} if counttomark 4 eq { 5 -1 roll pop % remove mark //true } { cleartomark //false } ifelse } bind def % Crop the page to the BoundingBox /EPSBoundingBoxCrop { % llx lly urx ury -- EPSDEBUG { (gs_epsf.ps: Setting pagesize from EPS bounding box\n) print flush } if exch 3 index sub exch 2 index sub % stack: llx lly urx-llx ury-lly << /PageSize [ 5 -2 roll ] >> setpagedevice neg exch neg exch translate } bind def % Rescale, translate and rotate to fit the BoundingBox on the page /EPSBoundingBoxFitPage { % llx lly urx ury -- EPSDEBUG { (gs_epsf.ps: Rescaling EPS to fit page\n) print flush } if clippath pathbbox newpath % translate to new origin at lower left of clippath 3 index 3 index translate % Figure out if rotate is needed. 1 index 4 index sub 1 index 4 index sub eq not { 1 index 4 index sub 1 index 4 index sub gt % bbox page-clipbox page-is-landscape 6 index 10 index sub 6 index 10 index sub gt % bbox page-clipbox page-is-landscape bbox-is-landscape xor }{ false }ifelse 9 1 roll % compute need-rotate. % stack: rotate-needed bbox page-clipbox % calculate scale to fit smaller of width or height exch 4 -1 roll sub 3 1 roll exch sub 4 2 roll 5 index 5 index 4 2 roll exch 4 -1 roll sub 3 1 roll exch sub 4 2 roll exch 4 -1 roll div 3 1 roll exch div 1 index 1 index lt {pop}{exch pop} ifelse dup scale % translate to EPS -llx,-lly exch neg exch neg translate % Finally perform the rotate if needed. { clippath pathbbox pop 0 exch translate 90 rotate pop pop } if } bind def /EPSBoundingBoxProcess { % (llx lly urx ury) state -- //systemdict /EPSBoundingBoxState get 1 index lt { exch EPSBoundingBoxParse { //systemdict /EPSCrop known { EPSBoundingBoxCrop } { //systemdict /EPSFitPage known { EPSBoundingBoxFitPage } { % Warn if some of the EPS file will be clipped clippath pathbbox newpath { % context for exit 5 -1 roll lt { 6 { pop } repeat //true exit } if 4 -1 roll lt { 4 { pop } repeat //true exit } if 3 -1 roll gt { 2 { pop } repeat //true exit } if exch gt { //true exit } if //false exit } loop QUIET not and /EPSBoundingBoxState .systemvar 1 and 1 eq and { (\n **** Warning: Some of the BoundingBox for the EPS file will be clipped.) = ( Use -dEPSCrop or -dEPSFitPage to avoid clipping.\n) = flush 1 add } if } ifelse } ifelse EPSBoundingBoxSetState } { pop % state } ifelse } { pop pop } ifelse } bind def /ProcessEPSComment { % file comment -- file comment /EPSBoundingBoxState .systemvar 3 lt { dup (%%BoundingBox:) anchorsearch { pop EPSDEBUG { (gs_epsf.ps: found %%BoundingBox\n) print flush } if 1 EPSBoundingBoxProcess } { (%%HiResBoundingBox:) anchorsearch { pop EPSDEBUG { (gs_epsf.ps: found %%HiResBoundingBox\n) print flush } if 3 EPSBoundingBoxProcess } { pop % Not interested in this DSC comment } ifelse } ifelse } if /EPSBoundingBoxState .systemvar 5 lt { dup (%%DocumentCustomColors:) anchorsearch { pop [ exch { { token not { exit } if dup type /stringtype ne { stop } if dup (atend) eq { stop } if exch } loop { counttomark 2 add index dup (123) .peekstring not { stop } if (%%+) eq { dup (123) readstring pop pop 256 string readline pop cvx exec } { pop exit } ifelse } loop } stopped { cleartomark } { counttomark 0 gt { currentpagedevice /MaxSeparations get 4 gt { ] << /SeparationColorNames 3 -1 roll >> setpagedevice } { cleartomark } ifelse } { cleartomark } ifelse } ifelse } { (%%EndComments) anchorsearch { pop pop % Ignore any following comments 5 EPSBoundingBoxSetState } { pop } ifelse } ifelse } if } bind def % Install EPS handler for DSC comments, which we do later /EPSBoundingBoxInit { systemdict /NOEPS known not { % Merge ProcessEPSComment with existing handler /ProcessEPSComment load /exec load currentuserparams /ProcessDSCComment get dup //null eq {pop {pop pop}} if /exec load 4 array astore cvx readonly << /ProcessDSCComment 3 -1 roll >> setuserparams } if } bind def /.runNoEPS /run load def /.runEPS { % file OR string -- /runEPS_save save def /runEPS_dict_count countdictstack def /runEPS_op_count count 2 sub def /runEPS_page_count currentpagedevice /PageCount get def 0 EPSBoundingBoxSetState .runNoEPS currentpagedevice /PageCount get runEPS_page_count sub 0 eq { /showpage load exec } if count runEPS_op_count sub {pop} repeat countdictstack runEPS_dict_count sub {end} repeat runEPS_save restore } bind def /run { % file OR string -- dup type /filetype ne { (r) file } if dup (%!PS-Adobe-) .peekstring { (%!PS-Adobe-) eq { dup (%!PS-Adobe-X.X EPSF-X.X) .peekstring { (EPSF) search { pop pop pop EPSDEBUG {(runEPS: Found EPS\n) print flush} if systemdict /NOEPS known { cvx .runNoEPS } { cvx .runEPS } ifelse } { EPSDEBUG {(runEPS: Normal DSC\n) print flush} if pop cvx .runNoEPS } ifelse } { EPSDEBUG {(runEPS: Short DSC\n) print flush} if pop cvx .runNoEPS } ifelse } { EPSDEBUG {(runEPS: Not DSC\n) print flush} if cvx .runNoEPS } ifelse } { EPSDEBUG {(runEPS: Short non-DSC\n) print flush} if pop cvx .runNoEPS } ifelse } bind odef % Handle DOS EPS files. /.runnoepsf /run load def /.epsfheader <C5D0D3C6> def /run { dup type /filetype ne { (r) file } if % Check for MS-DOS EPSF file (see Red Book p. 729). dup ( ) .peekstring { .epsfheader eq { dup ( ) readstring exch pop } { //false } ifelse } { pop //false } ifelse % Stack: file true/false { % This block is executed if the file is MS-DOS EPSF. % Build up the little-endian byte offset and length. 2 { 1 0 4 { 2 index read not { pop exit } if % if EOF, let error happen 2 index mul add exch 256 mul exch } repeat exch pop exch } repeat % Stack: offset length file % Use flushfile to skip quickly to the start of the % PostScript section. dup 4 -1 roll 12 sub () /SubFileDecode filter flushfile % Now interpret the PostScript. exch () /SubFileDecode filter cvx run } { .runnoepsf } ifelse } odef % rebind .runstdin to use redefined run userdict begin /.runstdin { { (%stdin) run } execute0 } bind def end