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/*
* in_ps.cpp -- read PS and PDF files using GS
* by pts@fazekas.hu at Tue Sep 30 12:33:11 CEST 2003
*/
#ifdef __GNUC__
#pragma implementation
#endif
#include "image.hpp"
#if USE_IN_PS || USE_IN_PDF
#include "error.hpp"
#include "gensio.hpp"
#include "helpere.hpp"
#include <string.h> /* memchr() */
#include <stdio.h> /* printf() */
#if OS_COTY==COTY_WIN9X || OS_COTY==COTY_WINNT
# define GS "gswin32c"
#else
# define GS "gs"
#endif
#endif /* USE_IN_PS || USE_IN_PDF */
/** Adds a Ghostscript invocation command. Works for both PS and PDF. */
static void add_gs_cmd(SimBuffer::B &cmd, SimBuffer::Flat const& hints) {
cmd << GS " -r72 -q -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -dLastPage=1 -sDEVICE=pnmraw -dDELAYSAFER -dBATCH -dNOPAUSE -sOutputFile=%D ";
char const *p=hints(), *r;
/* Dat: hints ends by ',' '\0' */
// Files::FILEW(stdout) << hints << ";;\n";
while (*p!=',') p++; /* Dat: safe, because hints is assumed to start and end by ',' */
while (1) {
assert(*p==',');
if (*++p=='\0') break;
if (p[0]=='g' && p[1]=='s' && p[2]=='=') {
r=p+=3;
while (*p!=',') p++;
cmd.vi_write(r, p-r); /* Dat: -r... in here overrides -r72 above */
cmd << ' ';
} else {
while (*p!=',') p++;
}
}
}
#if USE_IN_PS
/* !! -r144 and scale back..., also for PDF -- to enhance image quality */
#undef DO_KEEP_TEMP
#define DO_KEEP_TEMP 0
static Image::Sampled *in_ps_reader_low(Image::Loader::UFD* ufd, char const*bboxline, SimBuffer::Flat const& hints) {
SimBuffer::B mainfn;
if (!Files::find_tmpnam(mainfn)) Error::sev(Error::EERROR) << "in_ps_reader" << ": tmpnam() failed" << (Error*)0;
mainfn.term0();
#if DO_KEEP_TEMP
printf("m: %s\n", mainfn());
#else
Files::tmpRemoveCleanup(mainfn());
#endif
FILE *f=fopen(mainfn(),"w");
fprintf(f, "%s", bboxline);
/* vvv Dat: ignore extra calls to `showpage' */
fprintf(f, "/showpage [ currentdict /showpage {} /put load /showpage load ] cvx def\n");
fprintf(f, "_IFN (r) file cvx exec\nshowpage\n"); /* Dat: doesn't rely on GS to
recognise EPSF-x.y comment, so works with both old and new gs */
// ^^^ !! DOS EPSF etc. instead of exec/run
fclose(f);
// Error::sev(Error::EERROR) << "Cannot load PS images yet." << (Error*)0;
/* Dat: -dLastPage=1 has no effect, but we keep it for PDF compatibility */
/* !! keep only 1st page, without setpagedevice for PS files */
/* Dat: -dSAFER won't let me open the file with `/' under ESP Ghostscript 7.05.6 (2003-02-05) */
/* Imp: win9X command line too long? */
SimBuffer::B cmd;
add_gs_cmd(cmd,hints);
cmd << " -s_IFN=%S -- %*";
/*fprintf(stderr,"cmd:%s\n",cmd.term0()()); */
HelperE helper(cmd.term0()(), mainfn()); /* Run external process GS */
Filter::UngetFILED* ufdd=(Filter::UngetFILED*)ufd;
int i=ufdd->vi_getcc();
if (i<0) Error::sev(Error::EERROR) << "in_ps_reader: Empty PostScript file." << (Error*)0; /* should never happen */
((Filter::PipeE*)&helper)->vi_putcc(i);
Encoder::writeFrom(*(Filter::PipeE*)&helper, *ufdd);
((Filter::PipeE*)&helper)->vi_write(0,0); /* Signal EOF */
#if !DO_KEEP_TEMP
remove(mainfn());
#endif
return helper.getImg();
}
static Image::Sampled *in_ps_reader(Image::Loader::UFD* ufd, SimBuffer::Flat const& hints) {
/* Use the paper size (<</PageSize[...]>> setpagedevice; a4; letter etc.)
* set up by the PostScript file, or the system default paper size.
*/
return in_ps_reader_low(ufd, "", hints);
}
static Image::Sampled *in_eps_reader(Image::Loader::UFD* ufd, SimBuffer::Flat const& hints) {
/* Use the *BoundingBox if available, else use the paper size set up by
* the EPS file, or the system default paper size.
*/
double llx=0.0, lly=0.0, urx=0.0, ury=0.0;
Filter::UngetFILED* ufdd=(Filter::UngetFILED*)ufd;
/* ^^^ SUXX: no warning for ufdd=ufdd */
/* SUXX: valgrind, checkergcc: no indication of segfault due to stack overflow inside fgetc() */
SimBuffer::B line; /* Imp: limit for max line length etc. */
#if 0
while ((line.clearFree(), ufdd->appendLine(line), line)) {
line.term0();
printf("line: %s", line());
}
#endif
slen_t line0ofs;
int had=0;
while ((line0ofs=line.getLength(), ufdd->appendLine(line), line0ofs!=line.getLength())) {
char const *thisline=line()+line0ofs;
line.term0();
// printf("line: %s", thisline);
if (thisline[0]=='\n' || thisline[0]=='\r') continue; /* empty line */
if (thisline[0]=='%' && thisline[1]=='!') continue; /* %!PS-... */
if (thisline[0]!='%' || thisline[1]!='%') break; /* non-ADSC comment */
if (had<3 && 4==sscanf(thisline+2, "ExactBoundingBox:%lg%lg%lg%lg", &llx, &lly, &urx, &ury)) had=3;
else if (had<2 && 4==sscanf(thisline+2, "HiResBoundingBox:%lg%lg%lg%lg", &llx, &lly, &urx, &ury)) had=2;
else if (had<1 && 4==sscanf(thisline+2, "BoundingBox:%lg%lg%lg%lg", &llx, &lly, &urx, &ury)) had=1;
/* Dat: finds MetaPost hiresbbox after %%EndComments */
// printf("line: %s", line()+line0ofs);
}
ufdd->unread(line(), line.getLength()); line.clearFree();
char bboxline[400];
if (had!=0) {
// fprintf(stderr, "bbox=[%"PTS_CFG_PRINTFGLEN"g %"PTS_CFG_PRINTFGLEN"g %"PTS_CFG_PRINTFGLEN"g %"PTS_CFG_PRINTFGLEN"g]\n", llx, lly, urx, ury);
/* Dat: we must call translate _after_ setpagedevice (so it will take effect), at least with ESP Ghostscript 7.05.6 (2003-02-05); BUGFIX at Fri Aug 12 22:49:07 CEST 2005 */
sprintf(bboxline,
"<</PageSize[%"PTS_CFG_PRINTFGLEN"g %"PTS_CFG_PRINTFGLEN"g]>>setpagedevice\n"
/* removing /PageSize also cancels /a4, /a5 etc. */
/* we need `currentmatrix ... setpagedevice setmatrix' because
* setpagedevice cancels the current transformation matrix so our
* `translate' below would be canceled if the EPS file contains
* `a5', `setpagedevice' etc.
*/
"/setpagedevice{matrix currentmatrix exch "
"dup length dict copy dup /PageSize undef setpagedevice "
"setmatrix}bind def\n"
"%"PTS_CFG_PRINTFGLEN"g %"PTS_CFG_PRINTFGLEN"g translate\n"
, urx-llx, ury-lly, -llx, -lly);
} else {
Error::sev(Error::WARNING) << "in_eps_reader: missing EPS bbox" << (Error*)0;
bboxline[0]='\0';
}
return in_ps_reader_low(ufd, bboxline, hints);
}
static Image::Loader::reader_t in_ps_checker(char buf[Image::Loader::MAGIC_LEN], char [Image::Loader::MAGIC_LEN], SimBuffer::Flat const&, Image::Loader::UFD*) {
if (0!=memcmp(buf,"%!PS-Adobe-",11)) return 0;
char const *p=buf+11, *pend=buf+Image::Loader::MAGIC_LEN;
while (p!=pend && *p!=' ' && *p!='\t') p++;
while (p!=pend && (*p==' ' || *p=='\t')) p++;
/* Imp: option to accept BoundingBox for non-EPS PS */
return (0==strncmp(p,"EPSF-",5)) ? in_eps_reader : in_ps_reader;
/* ^^^ BUGFIX at Fri Nov 26 12:13:58 CET 2004 */
/* ^^^ BUGFIX again at Thu Jan 6 10:25:54 CET 2005 */
}
#else
#define in_ps_checker (Image::Loader::checker_t)NULLP
#endif /* USE_IN_PS */
Image::Loader in_ps_loader = { "PS", in_ps_checker, 0 };
#if USE_IN_PDF
static Image::Sampled *in_pdf_reader(Image::Loader::UFD* ufd, SimBuffer::Flat const& hints) {
// Error::sev(Error::EERROR) << "Cannot load PDF images yet." << (Error*)0;
SimBuffer::B cmd;
add_gs_cmd(cmd,hints);
cmd << " -- %S";
/* Dat: -dSAFER won't let me open the file with `/' under ESP Ghostscript 7.05.6 (2003-02-05) */
/* Imp: win9X command line too long? */
fprintf(stderr, "gs_cmd=(%s)\n", cmd.term0()());
HelperE helper(cmd.term0()()); /* Run external process GS */
Encoder::writeFrom(*(Filter::PipeE*)&helper, *(Filter::UngetFILED*)ufd);
((Filter::PipeE*)&helper)->vi_write(0,0); /* Signal EOF */
return helper.getImg();
}
static Image::Loader::reader_t in_pdf_checker(char buf[Image::Loader::MAGIC_LEN], char [Image::Loader::MAGIC_LEN], SimBuffer::Flat const&, Image::Loader::UFD*) {
return 0==memcmp(buf,"%PDF-",5) ? in_pdf_reader : 0;
}
#else
#define in_pdf_checker (Image::Loader::checker_t)NULLP
#endif /* USE_IN_PDF */
Image::Loader in_pdf_loader = { "PDF", in_pdf_checker, 0 };
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