/* pdf.c
*
* Copyright (C) 2008 Till Kamppeter <till.kamppeter@gmail.com>
* Copyright (C) 2008 Lars Uebernickel <larsuebernickel@gmx.de>
*
* This file is part of foomatic-rip.
*
* Foomatic-rip is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Foomatic-rip is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "foomaticrip.h"
#include "util.h"
#include "options.h"
#include "process.h"
#include "renderer.h"
#include <stdlib.h>
#include <ctype.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#define ARRAY_LEN(a) (sizeof(a) / sizeof(a[0]))
static int wait_for_renderer();
static int pdf_count_pages(const char *filename)
{
char gscommand[4095];
char output[31] = "";
int pagecount;
snprintf(gscommand, 4095, "%s -dNODISPLAY -q -c "
"'/pdffile (%s) (r) file def pdfdict begin pdffile pdfopen begin "
"(PageCount: ) print pdfpagecount == flush currentdict pdfclose "
"end end quit'",
gspath, filename);
FILE *pd = popen(gscommand, "r");
if (!pd)
rip_die(EXIT_STARVED, "Failed to execute ghostscript to determine number of input pages!\n");
fread(output, 1, 31, pd);
pclose(pd);
if (sscanf(output, "PageCount: %d", &pagecount) < 1)
pagecount = -1;
return pagecount;
}
pid_t kid3 = 0;
static int start_renderer(const char *cmd)
{
if (kid3 != 0)
wait_for_renderer();
_log("Starting renderer with command: %s\n", cmd);
kid3 = start_process("kid3", exec_kid3, (void *)cmd, NULL, NULL);
if (kid3 < 0)
rip_die(EXIT_STARVED, "Could not start renderer\n");
return 1;
}
static int wait_for_renderer()
{
int status;
waitpid(kid3, &status, 0);
if (!WIFEXITED(status)) {
_log("Kid3 did not finish normally.\n");
exit(EXIT_PRNERR_NORETRY_BAD_SETTINGS);
}
_log("Kid3 exit status: %d\n", WEXITSTATUS(status));
if (WEXITSTATUS(status) != 0)
exit(EXIT_PRNERR_NORETRY_BAD_SETTINGS);
kid3 = 0;
return 1;
}
/*
* Extract pages 'first' through 'last' from the pdf and write them into a
* temporary file.
*/
static int pdf_extract_pages(char filename[PATH_MAX],
const char *pdffilename,
int first,
int last)
{
char gscommand[4095];
char filename_arg[PATH_MAX], first_arg[50], last_arg[50];
int fd;
_log("Extracting pages %d through %d\n", first, last);
snprintf(filename, PATH_MAX, "%s/foomatic-XXXXXX", temp_dir());
if ((fd = mkstemp(filename)) == -1)
rip_die(EXIT_STARVED, "Unable to create temporary file!\n");
close (fd);
snprintf(filename_arg, PATH_MAX, "-sOutputFile=%s", filename);
snprintf(first_arg, 50, "-dFirstPage=%d", first);
if (last > 0)
snprintf(last_arg, 50, "-dLastPage=%d", last);
else
first_arg[0] = '\0';
snprintf(gscommand, 4095, "%s -q -dNOPAUSE -dBATCH -dPARANOIDSAFER -dNOINTERPOLATE"
"-sDEVICE=pdfwrite %s %s %s %s",
gspath, filename_arg, first_arg, last_arg, pdffilename);
FILE *pd = popen(gscommand, "r");
if (!pd)
rip_die(EXIT_STARVED, "Could not run ghostscript to extract the pages!\n");
pclose(pd);
return 1;
}
static int render_pages_with_generic_command(dstr_t *cmd,
const char *filename,
int firstpage,
int lastpage)
{
char tmpfile[PATH_MAX];
int result;
/* TODO it might be a good idea to give pdf command lines the possibility
* to get the file on the command line rather than piped through stdin
* (maybe introduce a &filename; ??) */
if (lastpage < 0) /* i.e. print the whole document */
dstrcatf(cmd, " < %s", filename);
else
{
if (!pdf_extract_pages(tmpfile, filename, firstpage, lastpage))
rip_die(EXIT_STARVED, "Could not run ghostscript to extract the pages!\n");
dstrcatf(cmd, " < %s", tmpfile);
}
result = start_renderer(cmd->data);
if (lastpage > 0)
unlink(tmpfile);
return result;
}
static int render_pages_with_ghostscript(dstr_t *cmd,
size_t start_gs_cmd,
size_t end_gs_cmd,
const char *filename,
int firstpage,
int lastpage)
{
char *p;
/* No need to create a temporary file, just give ghostscript the file and
* first/last page on the command line */
/* Some command lines want to read from stdin */
for (p = &cmd->data[end_gs_cmd -1]; isspace(*p); p--)
;
if (*p == '-')
*p = ' ';
dstrinsertf(cmd, end_gs_cmd, " %s ", filename);
if (lastpage > 0)
dstrinsertf(cmd, start_gs_cmd +2,
" -dFirstPage=%d -dLastPage=%d ",
firstpage, lastpage);
else
dstrinsertf(cmd, start_gs_cmd +2,
" -dFirstPage=%d ", firstpage);
return start_renderer(cmd->data);
}
static int render_pages(const char *filename, int firstpage, int lastpage)
{
dstr_t *cmd = create_dstr();
size_t start, end;
int result;
build_commandline(optionset("currentpage"), cmd, 1);
extract_command(&start, &end, cmd->data, "gs");
if (start == end)
/* command is not Ghostscript */
result = render_pages_with_generic_command(cmd,
filename,
firstpage,
lastpage);
else
/* Ghostscript command, tell it which pages we want to render */
result = render_pages_with_ghostscript(cmd,
start,
end,
filename,
firstpage,
lastpage);
free_dstr(cmd);
return result;
}
static int print_pdf_file(const char *filename)
{
int page_count, i;
int firstpage;
page_count = pdf_count_pages(filename);
if (page_count <= 0)
rip_die(EXIT_JOBERR, "Unable to determine number of pages, page count: %d\n", page_count);
_log("File contains %d pages\n", page_count);
optionset_copy_values(optionset("header"), optionset("currentpage"));
optionset_copy_values(optionset("currentpage"), optionset("previouspage"));
firstpage = 1;
for (i = 1; i <= page_count; i++)
{
set_options_for_page(optionset("currentpage"), i);
if (!optionset_equal(optionset("currentpage"), optionset("previouspage"), 1))
{
render_pages(filename, firstpage, i);
firstpage = i;
}
optionset_copy_values(optionset("currentpage"), optionset("previouspage"));
}
if (firstpage == 1)
render_pages(filename, 1, -1); /* Render the whole document */
else
render_pages(filename, firstpage, page_count);
wait_for_renderer();
return 1;
}
int print_pdf(FILE *s,
const char *alreadyread,
size_t len,
const char *filename,
size_t startpos)
{
char tmpfilename[PATH_MAX] = "";
int result;
/* If reading from stdin, write everything into a temporary file */
/* TODO don't do this if there aren't any pagerange-limited options */
if (s == stdin)
{
int fd;
FILE *tmpfile;
snprintf(tmpfilename, PATH_MAX, "%s/foomatic-XXXXXX", temp_dir());
fd = mkstemp(tmpfilename);
if (fd < 0) {
_log("Could not create temporary file: %s\n", strerror(errno));
return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
}
tmpfile = fdopen(fd, "r+");
copy_file(tmpfile, stdin, alreadyread, len);
fclose(tmpfile);
filename = tmpfilename;
}
result = print_pdf_file(filename);
if (!isempty(tmpfilename))
unlink(tmpfilename);
return result;
}