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/*
* PDF merge tool: Tool for merging pdf content.
*
* Simple test bed to work with merging pages from multiple PDFs into a single PDF.
*/
#include "mupdf/pdf.h"
static void usage(void)
{
fprintf(stderr,
"usage: mutool merge [-o output.pdf] [-O options] input.pdf [pages] [input2.pdf] [pages2] ...\n"
"\t-o\tname of PDF file to create\n"
"\t-O\tcomma separated list of output options\n"
"\tinput.pdf\tname of input file from which to copy pages\n"
"\tpages\tcomma separated list of page numbers and ranges\n"
);
fprintf(stderr, "%s\n", fz_pdf_write_options_usage);
exit(1);
}
static fz_context *ctx = NULL;
static pdf_document *doc_des = NULL;
static pdf_document *doc_src = NULL;
static void page_merge(int page_from, int page_to, pdf_graft_map *graft_map)
{
pdf_obj *page_ref;
pdf_obj *page_dict;
pdf_obj *obj;
pdf_obj *ref = NULL;
int i;
/* Copy as few key/value pairs as we can. Do not include items that reference other pages. */
static pdf_obj * const copy_list[] = { PDF_NAME_Contents, PDF_NAME_Resources,
PDF_NAME_MediaBox, PDF_NAME_CropBox, PDF_NAME_BleedBox, PDF_NAME_TrimBox, PDF_NAME_ArtBox,
PDF_NAME_Rotate, PDF_NAME_UserUnit };
fz_var(ref);
fz_try(ctx)
{
page_ref = pdf_lookup_page_obj(ctx, doc_src, page_from - 1);
pdf_flatten_inheritable_page_items(ctx, page_ref);
/* Make a new page object dictionary to hold the items we copy from the source page. */
page_dict = pdf_new_dict(ctx, doc_des, 4);
pdf_dict_put_drop(ctx, page_dict, PDF_NAME_Type, PDF_NAME_Page);
for (i = 0; i < nelem(copy_list); i++)
{
obj = pdf_dict_get(ctx, page_ref, copy_list[i]);
if (obj != NULL)
pdf_dict_put_drop(ctx, page_dict, copy_list[i], pdf_graft_object(ctx, doc_des, doc_src, obj, graft_map));
}
/* Add the page object to the destination document. */
ref = pdf_add_object_drop(ctx, doc_des, page_dict);
/* Insert it into the page tree. */
pdf_insert_page(ctx, doc_des, page_to - 1, ref);
}
fz_always(ctx)
{
pdf_drop_obj(ctx, ref);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void merge_range(const char *range)
{
int start, end, i, count;
pdf_graft_map *graft_map;
count = pdf_count_pages(ctx, doc_src);
graft_map = pdf_new_graft_map(ctx, doc_src);
fz_try(ctx)
{
while ((range = fz_parse_page_range(ctx, range, &start, &end, count)))
{
if (start < end)
for (i = start; i <= end; ++i)
page_merge(i, -1, graft_map);
else
for (i = start; i >= end; --i)
page_merge(i, -1, graft_map);
}
}
fz_always(ctx)
{
pdf_drop_graft_map(ctx, graft_map);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
int pdfmerge_main(int argc, char **argv)
{
pdf_write_options opts = { 0 };
char *output = "out.pdf";
char *flags = "";
char *input;
int c;
while ((c = fz_getopt(argc, argv, "o:O:")) != -1)
{
switch (c)
{
case 'o': output = fz_optarg; break;
case 'O': flags = fz_optarg; break;
default: usage(); break;
}
}
if (fz_optind == argc)
usage();
ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
if (!ctx)
{
fprintf(stderr, "error: Cannot initialize MuPDF context.\n");
exit(1);
}
pdf_parse_write_options(ctx, &opts, flags);
fz_try(ctx)
{
doc_des = pdf_create_document(ctx);
}
fz_catch(ctx)
{
fprintf(stderr, "error: Cannot create destination document.\n");
exit(1);
}
/* Step through the source files */
while (fz_optind < argc)
{
input = argv[fz_optind++];
fz_try(ctx)
{
pdf_drop_document(ctx, doc_src);
doc_src = pdf_open_document(ctx, input);
if (fz_optind == argc || !fz_is_page_range(ctx, argv[fz_optind]))
merge_range("1-N");
else
merge_range(argv[fz_optind++]);
}
fz_catch(ctx)
{
fprintf(stderr, "error: Cannot merge document '%s'.\n", input);
exit(1);
}
}
fz_try(ctx)
{
pdf_save_document(ctx, doc_des, output, &opts);
}
fz_always(ctx)
{
pdf_drop_document(ctx, doc_des);
pdf_drop_document(ctx, doc_src);
}
fz_catch(ctx)
{
fprintf(stderr, "error: Cannot save output file: '%s'.\n", output);
exit(1);
}
fz_flush_warnings(ctx);
fz_drop_context(ctx);
return 0;
}
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