static void
intersect_box(fz_context *ctx, pdf_document *doc, pdf_obj *page, pdf_obj *box_name, const fz_rect *mb)
{
pdf_obj *box = pdf_dict_get(ctx, page, box_name);
pdf_obj *newbox;
fz_rect old_rect;
if (box == NULL)
return;
old_rect.x0 = pdf_to_real(ctx, pdf_array_get(ctx, box, 0));
old_rect.y0 = pdf_to_real(ctx, pdf_array_get(ctx, box, 1));
old_rect.x1 = pdf_to_real(ctx, pdf_array_get(ctx, box, 2));
old_rect.y1 = pdf_to_real(ctx, pdf_array_get(ctx, box, 3));
if (old_rect.x0 < mb->x0)
old_rect.x0 = mb->x0;
if (old_rect.y0 < mb->y0)
old_rect.y0 = mb->y0;
if (old_rect.x1 > mb->x1)
old_rect.x1 = mb->x1;
if (old_rect.y1 > mb->y1)
old_rect.y1 = mb->y1;
newbox = pdf_new_array(ctx, doc, 4);
pdf_array_push(ctx, newbox, pdf_new_real(ctx, doc, old_rect.x0));
pdf_array_push(ctx, newbox, pdf_new_real(ctx, doc, old_rect.y0));
pdf_array_push(ctx, newbox, pdf_new_real(ctx, doc, old_rect.x1));
pdf_array_push(ctx, newbox, pdf_new_real(ctx, doc, old_rect.y1));
pdf_dict_put(ctx, page, box_name, newbox);
}
pdf_obj *
pdf_copy_array(fz_context *ctx, pdf_obj *obj)
{
pdf_document *doc;
pdf_obj *arr;
int i;
int n;
RESOLVE(obj);
if (!OBJ_IS_ARRAY(obj))
fz_throw(ctx, FZ_ERROR_GENERIC, "not an array (%s)", pdf_objkindstr(obj));
doc = ARRAY(obj)->doc;
n = pdf_array_len(ctx, obj);
arr = pdf_new_array(ctx, doc, n);
fz_try(ctx)
for (i = 0; i < n; i++)
pdf_array_push(ctx, arr, pdf_array_get(ctx, obj, i));
fz_catch(ctx)
{
pdf_drop_obj(ctx, arr);
fz_rethrow(ctx);
}
return arr;
}
static pdf_obj *start_new_destpage(fz_context *ctx,double width_pts,double height_pts)
{
pdf_obj *pageobj;
pdf_obj *mbox;
pageobj=pdf_new_dict(ctx,2);
pdf_dict_puts(pageobj,"Type",pdf_new_name(ctx,"Page"));
mbox=pdf_new_array(ctx,4);
pdf_array_push(mbox,pdf_new_real(ctx,0.));
pdf_array_push(mbox,pdf_new_real(ctx,0.));
pdf_array_push(mbox,pdf_new_real(ctx,width_pts));
pdf_array_push(mbox,pdf_new_real(ctx,height_pts));
pdf_dict_puts(pageobj,"MediaBox",mbox);
return(pageobj);
}
static void retainpage(fz_context *ctx, pdf_document *doc, pdf_obj *parent, pdf_obj *kids, int page)
{
pdf_obj *pageref = pdf_lookup_page_obj(ctx, doc, page-1);
pdf_obj *pageobj = pdf_resolve_indirect(ctx, pageref);
pdf_dict_put(ctx, pageobj, PDF_NAME_Parent, parent);
/* Store page object in new kids array */
pdf_array_push(ctx, kids, pageref);
}
void
pdf_array_push_drop(fz_context *ctx, pdf_obj *obj, pdf_obj *item)
{
fz_try(ctx)
pdf_array_push(ctx, obj, item);
fz_always(ctx)
pdf_drop_obj(ctx, item);
fz_catch(ctx)
fz_rethrow(ctx);
}
static void retainpage(fz_context *ctx, pdf_document *doc, pdf_obj *parent, pdf_obj *kids, int page)
{
pdf_obj *pageref = pdf_lookup_page_obj(ctx, doc, page-1);
pdf_flatten_inheritable_page_items(ctx, pageref);
pdf_dict_put(ctx, pageref, PDF_NAME_Parent, parent);
/* Store page object in new kids array */
pdf_array_push(ctx, kids, pageref);
}
pdf_obj *pdf_new_rect(fz_context *ctx, pdf_document *doc, const fz_rect *rect)
{
pdf_obj *arr = NULL;
pdf_obj *item = NULL;
fz_var(arr);
fz_var(item);
fz_try(ctx)
{
arr = pdf_new_array(ctx, doc, 4);
item = pdf_new_real(ctx, doc, rect->x0);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, rect->y0);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, rect->x1);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, rect->y1);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(ctx, item);
pdf_drop_obj(ctx, arr);
fz_rethrow(ctx);
}
return arr;
}
pdf_obj *pdf_new_rect(fz_context *ctx, fz_rect rect)
{
pdf_obj *arr = NULL;
pdf_obj *item = NULL;
fz_var(arr);
fz_var(item);
fz_try(ctx)
{
arr = pdf_new_array(ctx, 4);
item = pdf_new_real(ctx, rect.x0);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, rect.y0);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, rect.x1);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, rect.y1);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(item);
pdf_drop_obj(arr);
fz_rethrow(ctx);
}
return arr;
}
/*
** Merge items in src array into dst array (do not duplicate items).
*/
static void wmupdf_array_merge(fz_context *ctx,char *arrayname,pdf_obj *dstarray,pdf_obj *srcarray)
{
int i,len;
/*
printf(" Merging %s arrays: %d <-- %d\n",arrayname,pdf_to_num(dstarray),pdf_to_num(srcarray));
*/
len=pdf_array_len(srcarray);
for (i=0;i<len;i++)
if (!pdf_array_contains(dstarray,pdf_array_get(srcarray,i)))
pdf_array_push(dstarray,pdf_array_get(srcarray,i));
}
void
pdf_array_push_drop(fz_context *ctx, pdf_obj *obj, pdf_obj *item)
{
RESOLVE(obj);
if (obj >= PDF_OBJ__LIMIT)
{
fz_try(ctx)
pdf_array_push(ctx, obj, item);
fz_always(ctx)
pdf_drop_obj(ctx, item);
fz_catch(ctx)
fz_rethrow(ctx);
}
}
/*
** From MuPDF pdfclean.c
*/
static void wmupdf_preserve_old_dests(pdf_obj *olddests,fz_context *ctx,pdf_document *xref,
pdf_obj *pages)
{
int i;
pdf_obj *names = pdf_new_dict(ctx,1);
pdf_obj *dests = pdf_new_dict(ctx,1);
pdf_obj *names_list = pdf_new_array(ctx,32);
int len = pdf_dict_len(olddests);
pdf_obj *root;
for (i=0;i<len;i++)
{
pdf_obj *key = pdf_dict_get_key(olddests,i);
pdf_obj *val = pdf_dict_get_val(olddests,i);
pdf_obj *key_str = pdf_new_string(ctx,pdf_to_name(key),strlen(pdf_to_name(key)));
pdf_obj *dest = pdf_dict_gets(val,"D");
dest = pdf_array_get(dest ? dest : val, 0);
if (pdf_array_contains(pdf_dict_gets(pages,"Kids"),dest))
{
pdf_array_push(names_list, key_str);
pdf_array_push(names_list, val);
}
pdf_drop_obj(key_str);
}
root = pdf_dict_gets(xref->trailer,"Root");
pdf_dict_puts(dests,"Names",names_list);
pdf_dict_puts(names,"Dests",dests);
pdf_dict_puts(root,"Names",names);
pdf_drop_obj(names);
pdf_drop_obj(dests);
pdf_drop_obj(names_list);
pdf_drop_obj(olddests);
}
void
pdf_array_put(fz_context *ctx, pdf_obj *obj, int i, pdf_obj *item)
{
RESOLVE(obj);
if (!OBJ_IS_ARRAY(obj))
fz_throw(ctx, FZ_ERROR_GENERIC, "not an array (%s)", pdf_objkindstr(obj));
if (i == ARRAY(obj)->len)
{
pdf_array_push(ctx, obj, item);
return;
}
if (i < 0 || i > ARRAY(obj)->len)
fz_throw(ctx, FZ_ERROR_GENERIC, "index out of bounds");
prepare_object_for_alteration(ctx, obj, item);
pdf_drop_obj(ctx, ARRAY(obj)->items[i]);
ARRAY(obj)->items[i] = pdf_keep_obj(ctx, item);
}
static void add_field_hierarchy_to_array(pdf_obj *array, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_gets(field, "Kids");
pdf_obj *exclude = pdf_dict_gets(field, "Exclude");
if (exclude)
return;
pdf_array_push(array, field);
if (kids)
{
int i, n = pdf_array_len(kids);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(array, pdf_array_get(kids, i));
}
}
static void add_field_hierarchy_to_array(fz_context *ctx, pdf_obj *array, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
pdf_obj *exclude = pdf_dict_get(ctx, field, PDF_NAME_Exclude);
if (exclude)
return;
pdf_array_push(ctx, array, field);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(ctx, array, pdf_array_get(ctx, kids, i));
}
}
pdf_obj *pdf_new_matrix(fz_context *ctx, pdf_document *doc, const fz_matrix *mtx)
{
pdf_obj *arr = NULL;
pdf_obj *item = NULL;
fz_var(arr);
fz_var(item);
fz_try(ctx)
{
arr = pdf_new_array(ctx, doc, 6);
item = pdf_new_real(ctx, doc, mtx->a);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, mtx->b);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, mtx->c);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, mtx->d);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, mtx->e);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
item = pdf_new_real(ctx, doc, mtx->f);
pdf_array_push(ctx, arr, item);
pdf_drop_obj(ctx, item);
item = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(ctx, item);
pdf_drop_obj(ctx, arr);
fz_rethrow(ctx);
}
return arr;
}
pdf_obj *pdf_new_matrix(fz_context *ctx, fz_matrix mtx)
{
pdf_obj *arr = NULL;
pdf_obj *item = NULL;
fz_var(arr);
fz_var(item);
fz_try(ctx)
{
arr = pdf_new_array(ctx, 6);
item = pdf_new_real(ctx, mtx.a);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, mtx.b);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, mtx.c);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, mtx.d);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, mtx.e);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
item = pdf_new_real(ctx, mtx.f);
pdf_array_push(arr, item);
pdf_drop_obj(item);
item = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(item);
pdf_drop_obj(arr);
fz_rethrow(ctx);
}
return arr;
}
pdf_obj *
pdf_copy_array(fz_context *ctx, pdf_obj *obj)
{
pdf_obj *arr;
int i;
int n;
RESOLVE(obj);
if (!obj)
return NULL; /* Can't warn :( */
if (obj->kind != PDF_ARRAY)
fz_warn(ctx, "assert: not an array (%s)", pdf_objkindstr(obj));
arr = pdf_new_array(ctx, pdf_array_len(obj));
n = pdf_array_len(obj);
for (i = 0; i < n; i++)
pdf_array_push(arr, pdf_array_get(obj, i));
return arr;
}
pdf_obj *
pdf_copy_array(fz_context *ctx, pdf_obj *obj)
{
pdf_document *doc;
pdf_obj *arr;
int i;
int n;
RESOLVE(obj);
if (obj < PDF_OBJ__LIMIT || obj->kind != PDF_ARRAY)
fz_throw(ctx, FZ_ERROR_GENERIC, "assert: not an array (%s)", pdf_objkindstr(obj));
doc = ARRAY(obj)->doc;
n = pdf_array_len(ctx, obj);
arr = pdf_new_array(ctx, doc, n);
for (i = 0; i < n; i++)
pdf_array_push(ctx, arr, pdf_array_get(ctx, obj, i));
return arr;
}
/* dest points to the new pages content-streams-dict, src is a reference to
one source content-stream */
int copy_content_stream_of_page(fz_context *dest_ctx, pdf_obj *dest,
fz_context *src_ctx, pdf_obj *src,
struct put_info *info, struct pos_info *pos)
{
if(!pdf_is_array(dest_ctx, dest) && !pdf_is_indirect(src_ctx, src))
return(-1);
/*
translation: 1 0 0 1 diff_x diff_y
scale: scale 0 0 scale 0 0
rotation: cos sin -sin cos 0 0
-------------------------------------------------
rotation 0: 1 0 0 1 0 0
rotation 90: 0 1 -1 0 0 0
rotation 180: -1 0 0 -1 0 0
rotation 270: 0 -1 1 0 0 0
*/
fz_buffer *buffer = fz_new_buffer(dest_ctx, 1024);
fz_output *output = fz_new_output_with_buffer(dest_ctx, buffer);
fz_printf(dest_ctx, output, "q\n");
/* set the outer clip region */
fz_printf(dest_ctx, output, "%f %f %f %f re W n\n",
pos->outer_clip_x, pos->outer_clip_y,
pos->outer_clip_width, pos->outer_clip_height);
/* position the page correctly */
if(pos->rotate == 0) {
fz_printf(dest_ctx, output, "1 0 0 1 %f %f cm\n",
pos->x + pos->content_translate_x, pos->y + pos->content_translate_y);
} else if(pos->rotate == 90) {
fz_printf(dest_ctx, output, "0 1 -1 0 %f %f cm\n", pos->x + pos->width, pos->y);
} else if(pos->rotate == 180) {
fz_printf(dest_ctx, output, "-1 0 0 -1 %f %f cm\n",
pos->width + pos->x - pos->content_translate_x,
pos->height + pos->y - pos->content_translate_y);
} else if(pos->rotate == 270) {
fz_printf(dest_ctx, output, "0 -1 1 0 %f %f cm\n", pos->x, pos->y + pos->height);
}
if(pos->bleed_clip_x != 0.0 || pos->bleed_clip_y != 0.0 ||
pos->bleed_clip_width != 0.0 || pos->bleed_clip_height != 0.0)
{
fz_printf(dest_ctx, output, "%f %f %f %f re W n\n",
pos->bleed_clip_x, pos->bleed_clip_y, pos->bleed_clip_width, pos->bleed_clip_height);
}
int src_num = pdf_to_num(src_ctx, src);
int src_gen = pdf_to_gen(src_ctx, src);
fz_stream *input = pdf_open_stream(src_ctx, info->src_doc, src_num, src_gen);
rename_res_in_content_stream(src_ctx, input, dest_ctx, output, info->rename_dict);
fz_printf(dest_ctx, output, "Q");
fz_drop_output(dest_ctx, output);
fz_drop_stream(dest_ctx, input);
int new_num = pdf_create_object(dest_ctx, info->dest_doc);
pdf_obj *new_ref = pdf_new_indirect(dest_ctx, info->dest_doc, new_num, 0);
/* each stream has a dict containing at least its length... */
pdf_obj *stream_info_dict = pdf_new_dict(dest_ctx, info->dest_doc, 1);
pdf_dict_puts_drop(dest_ctx, stream_info_dict, "Length", pdf_new_int(dest_ctx, info->dest_doc, buffer->len));
pdf_update_object(dest_ctx, info->dest_doc, new_num, stream_info_dict);
pdf_drop_obj(dest_ctx, stream_info_dict);
pdf_update_stream(dest_ctx, info->dest_doc, new_ref, buffer, 0);
fz_drop_buffer(dest_ctx, buffer);
pdf_array_push(dest_ctx, dest, new_ref);
pdf_drop_obj(dest_ctx, new_ref);
return(0);
}
static void retainpages(fz_context *ctx, globals *glo, int argc, char **argv)
{
pdf_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
pdf_document *doc = glo->doc;
int argidx = 0;
pdf_obj *names_list = NULL;
int pagecount;
int i;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root);
pages = pdf_dict_get(ctx, oldroot, PDF_NAME_Pages);
olddests = pdf_load_name_tree(ctx, doc, PDF_NAME_Dests);
root = pdf_new_dict(ctx, doc, 2);
pdf_dict_put(ctx, root, PDF_NAME_Type, pdf_dict_get(ctx, oldroot, PDF_NAME_Type));
pdf_dict_put(ctx, root, PDF_NAME_Pages, pdf_dict_get(ctx, oldroot, PDF_NAME_Pages));
pdf_update_object(ctx, doc, pdf_to_num(ctx, oldroot), root);
pdf_drop_obj(ctx, root);
/* Create a new kids array with only the pages we want to keep */
parent = pdf_new_indirect(ctx, doc, pdf_to_num(ctx, pages), pdf_to_gen(ctx, pages));
kids = pdf_new_array(ctx, doc, 1);
/* Retain pages specified */
while (argc - argidx)
{
int page, spage, epage;
char *spec, *dash;
char *pagelist = argv[argidx];
pagecount = pdf_count_pages(ctx, doc);
spec = fz_strsep(&pagelist, ",");
while (spec)
{
dash = strchr(spec, '-');
if (dash == spec)
spage = epage = pagecount;
else
spage = epage = atoi(spec);
if (dash)
{
if (strlen(dash) > 1)
epage = atoi(dash + 1);
else
epage = pagecount;
}
spage = fz_clampi(spage, 1, pagecount);
epage = fz_clampi(epage, 1, pagecount);
if (spage < epage)
for (page = spage; page <= epage; ++page)
retainpage(ctx, doc, parent, kids, page);
else
for (page = spage; page >= epage; --page)
retainpage(ctx, doc, parent, kids, page);
spec = fz_strsep(&pagelist, ",");
}
argidx++;
}
pdf_drop_obj(ctx, parent);
/* Update page count and kids array */
countobj = pdf_new_int(ctx, doc, pdf_array_len(ctx, kids));
pdf_dict_put(ctx, pages, PDF_NAME_Count, countobj);
pdf_drop_obj(ctx, countobj);
pdf_dict_put(ctx, pages, PDF_NAME_Kids, kids);
pdf_drop_obj(ctx, kids);
/* Also preserve the (partial) Dests name tree */
if (olddests)
{
pdf_obj *names = pdf_new_dict(ctx, doc, 1);
pdf_obj *dests = pdf_new_dict(ctx, doc, 1);
int len = pdf_dict_len(ctx, olddests);
names_list = pdf_new_array(ctx, doc, 32);
for (i = 0; i < len; i++)
{
pdf_obj *key = pdf_dict_get_key(ctx, olddests, i);
pdf_obj *val = pdf_dict_get_val(ctx, olddests, i);
pdf_obj *dest = pdf_dict_get(ctx, val, PDF_NAME_D);
dest = pdf_array_get(ctx, dest ? dest : val, 0);
if (pdf_array_contains(ctx, pdf_dict_get(ctx, pages, PDF_NAME_Kids), dest))
{
pdf_obj *key_str = pdf_new_string(ctx, doc, pdf_to_name(ctx, key), strlen(pdf_to_name(ctx, key)));
pdf_array_push(ctx, names_list, key_str);
pdf_array_push(ctx, names_list, val);
pdf_drop_obj(ctx, key_str);
}
}
root = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root);
pdf_dict_put(ctx, dests, PDF_NAME_Names, names_list);
pdf_dict_put(ctx, names, PDF_NAME_Dests, dests);
pdf_dict_put(ctx, root, PDF_NAME_Names, names);
pdf_drop_obj(ctx, names);
pdf_drop_obj(ctx, dests);
pdf_drop_obj(ctx, names_list);
pdf_drop_obj(ctx, olddests);
}
/* Force the next call to pdf_count_pages to recount */
glo->doc->page_count = 0;
/* Edit each pages /Annot list to remove any links that point to
* nowhere. */
pagecount = pdf_count_pages(ctx, doc);
for (i = 0; i < pagecount; i++)
{
pdf_obj *pageref = pdf_lookup_page_obj(ctx, doc, i);
pdf_obj *pageobj = pdf_resolve_indirect(ctx, pageref);
pdf_obj *annots = pdf_dict_get(ctx, pageobj, PDF_NAME_Annots);
int len = pdf_array_len(ctx, annots);
int j;
for (j = 0; j < len; j++)
{
pdf_obj *o = pdf_array_get(ctx, annots, j);
pdf_obj *p;
if (!pdf_name_eq(ctx, pdf_dict_get(ctx, o, PDF_NAME_Subtype), PDF_NAME_Link))
continue;
p = pdf_dict_get(ctx, o, PDF_NAME_A);
if (!pdf_name_eq(ctx, pdf_dict_get(ctx, p, PDF_NAME_S), PDF_NAME_GoTo))
continue;
if (string_in_names_list(ctx, pdf_dict_get(ctx, p, PDF_NAME_D), names_list))
continue;
/* FIXME: Should probably look at Next too */
/* Remove this annotation */
pdf_array_delete(ctx, annots, j);
j--;
}
}
}
static int wmupdf_pdfdoc_newpages(pdf_document *xref,fz_context *ctx,WPDFPAGEINFO *pageinfo,
int use_forms,FILE *out)
{
static char *funcname="wmupdf_pdfdoc_newpages";
pdf_obj *root,*oldroot,*pages,*kids,*countobj,*parent,*olddests;
pdf_obj *srcpageobj,*srcpagecontents;
pdf_obj *destpageobj,*destpagecontents,*destpageresources;
double srcx0,srcy0;
int qref,i,i0,pagecount,srccount,destpageref,nbb;
int *srcpageused;
char *bigbuf;
double srcpagerot;
/* Avoid compiler warning */
destpageref = 0;
destpageobj = NULL;
srcx0=srcy0=0.;
/* Keep only pages/type and (reduced) dest entries to avoid references to unretained pages */
pagecount = pdf_count_pages(xref);
if (use_forms)
{
willus_mem_alloc_warn((void **)&srcpageused,sizeof(int)*(pagecount+1),funcname,10);
/* Mark all source pages as "not done" */
for (i=0;i<=pagecount;i++)
srcpageused[i]=0;
nbb=4096;
willus_mem_alloc_warn((void **)&bigbuf,nbb,funcname,10);
bigbuf[0]='\0';
}
oldroot = pdf_dict_gets(xref->trailer,"Root");
/*
** pages points to /Pages object in PDF file.
** Has: /Type /Pages, /Count <numpages>, /Kids [ obj obj obj obj ]
*/
pages = pdf_dict_gets(oldroot,"Pages");
olddests = pdf_load_name_tree(xref,"Dests");
/*
** Create new root object with only /Pages and /Type (and reduced dest entries)
** to avoid references to unretained pages.
*/
root = pdf_new_dict(ctx,4);
pdf_dict_puts(root,"Type",pdf_dict_gets(oldroot,"Type"));
pdf_dict_puts(root,"Pages",pages);
pdf_update_object(xref,pdf_to_num(oldroot),root);
pdf_drop_obj(root);
/* Parent indirectly references the /Pages object in the file */
/* (Each new page we create has to point to this.) */
parent = pdf_new_indirect(ctx, pdf_to_num(pages), pdf_to_gen(pages), xref);
/* Create a new kids array with only the pages we want to keep */
kids = pdf_new_array(ctx, 1);
qref=0;
/* Avoid compiler warnings */
destpageresources=NULL;
destpagecontents=NULL;
srcpagecontents=NULL;
srcpagerot=0.;
for (i=0;i<=pageinfo->boxes.n;i++)
if (pageinfo->boxes.box[i].dstpage>0)
break;
if (i>0)
{
if (i<pageinfo->boxes.n)
memmove(&pageinfo->boxes.box[0],&pageinfo->boxes.box[i],sizeof(WPDFBOX)*pageinfo->boxes.n-i);
pageinfo->boxes.n -= i;
}
/* Walk through PFDBOXES array */
for (i=srccount=i0=0;i<=pageinfo->boxes.n;i++)
{
WPDFBOX *box;
int j,k,newsrc;
static char buf[512];
pdf_obj *s1indirect,*qindirect,*rotobj;
static double cpm[3][3],m[3][3],m1[3][3];
static double xclip[4],yclip[4];
/*
printf("box[%d]\n",i);
if (i<pageinfo->boxes.n)
{
box=&pageinfo->boxes.box[i];
printf(" srcpage=%d, dstpage=%d\n",box->srcbox.pageno,box->dstpage);
printf(" x0=%g, y0=%g\n",box->x0,box->y0);
printf(" w=%g, h=%g\n",box->w,box->h);
printf(" x1=%g, y1=%g\n",box->x1,box->y1);
printf(" sr=%g, dr=%g\n",box->srcrot_deg,box->dstrot_deg);
printf(" scale=%g\n",box->scale);
}
*/
/* Check to see if we are done with an output page */
if (srccount>0 && (i==pageinfo->boxes.n
|| (i>0 && pageinfo->boxes.box[i].dstpage!=pageinfo->boxes.box[i-1].dstpage)))
{
pdf_obj *newpageref;
/*
** Store destination page into document structure
*/
/*
printf(" ADDING NEW PAGE. (srccount=%d)\n",srccount);
*/
if (use_forms)
{
pdf_obj *dest_stream;
/* Create new object in document for destination page stream */
dest_stream = pdf_new_indirect(ctx,new_stream_object(xref,ctx,bigbuf),
0,(void *)xref);
/* Store this into the destination page contents array */
pdf_array_push(destpagecontents,dest_stream);
pdf_drop_obj(dest_stream);
}
newpageref=pdf_new_indirect(ctx,destpageref,0,(void *)xref);
/* Reference parent list of pages */
pdf_dict_puts(destpageobj,"Parent",parent);
pdf_dict_puts(destpageobj,"Contents",destpagecontents);
pdf_dict_puts(destpageobj,"Resources",destpageresources);
/* Store page object in document's kids array */
pdf_array_push(kids,newpageref);
/* Update document with new page */
pdf_update_object(xref,destpageref,destpageobj);
/* Clean up */
pdf_drop_obj(newpageref);
pdf_drop_obj(destpageresources);
pdf_drop_obj(destpagecontents);
pdf_drop_obj(destpageobj);
/* Reset source page and index to start of new destination page */
i0=i;
srccount=0;
}
/* Quit loop if beyond last box */
if (i>=pageinfo->boxes.n)
break;
box=&pageinfo->boxes.box[i];
if (box->srcbox.pageno<1 || box->srcbox.pageno>pagecount)
continue;
/* Is this a source page we haven't processed yet (for this destination page)? */
for (newsrc=1,j=i0;j<i;j++)
{
if (pageinfo->boxes.box[j].srcbox.pageno==box->srcbox.pageno)
{
newsrc=0;
break;
}
}
if (newsrc)
{
double v[4];
srccount++;
if (use_forms)
srcpageused[box->srcbox.pageno]=1;
/*
printf(" NEW SOURCE PAGE (srccount=%d)\n",srccount);
*/
if (srccount==1)
{
/*
** Start a new destination page.
**
** Each new page object is a dict type with:
** /Type /Page
** /Contents (array of objects)
** /Resources (dict)
** /MediaBox [0 0 612 792]
** /Parent <PagesObj>
** [Can have /Rotate 90, for example.]
**
*/
/*
printf(" (STARTING NEW DEST. PAGE)\n");
*/
destpageobj=start_new_destpage(ctx,box->dst_width_pts,box->dst_height_pts);
destpageresources=pdf_new_dict(ctx,1);
if (use_forms)
pdf_dict_puts(destpageresources,"XObject",pdf_new_dict(ctx,1));
destpageref=pdf_create_object(xref);
destpagecontents=pdf_new_array(ctx,1);
/* Init the destination page stream for forms */
if (use_forms)
bigbuf[0]='\0';
}
/* New source page, so get the source page objects */
srcpageobj = xref->page_objs[box->srcbox.pageno-1];
wmupdf_page_bbox(srcpageobj,v);
srcx0=v[0];
srcy0=v[1];
/*
printf("SRCX0=%g, SRCY0=%g\n",srcx0,srcy0);
*/
rotobj=pdf_dict_gets(srcpageobj,"Rotate");
srcpagerot = rotobj!=NULL ? pdf_to_real(rotobj) : 0.;
/*
printf("Page rotation = %g\n",srcpagerot);
*/
srcpagecontents=pdf_dict_gets(srcpageobj,"Contents");
/*
if (pdf_is_array(srcpagecontents))
{
int k;
printf(" source page contents = array.\n");
for (k=0;k<pdf_array_len(srcpagecontents);k++)
{
pdf_obj *obj;
obj=pdf_array_get(srcpagecontents,k);
if (pdf_is_indirect(obj))
{
printf(" contents[%d] = indirect (%d)\n",k,pdf_to_num(obj));
pdf_resolve_indirect(obj);
}
}
}
*/
if (use_forms)
{
pdf_obj *xobjdict;
int pageno;
xobjdict=pdf_dict_gets(destpageresources,"XObject");
pageno=box->srcbox.pageno;
pdf_dict_puts(xobjdict,xobject_name(pageno),xref->page_refs[pageno-1]);
pdf_dict_puts(destpageresources,"XObject",xobjdict);
}
else
{
pdf_obj *srcpageresources;
/* Merge source page resources into destination page resources */
srcpageresources=pdf_dict_gets(srcpageobj,"Resources");
/*
printf("box->dstpage=%d, srcpage=%d (ind.#=%d)\n",box->dstpage,box->srcbox.pageno,pdf_to_num(xref->page_refs[box->srcbox.pageno-1]));
*/
wmupdf_dict_merge(ctx,"Resources",destpageresources,srcpageresources);
}
}
/*
** Process this source box:
**
** Create a tranformation matrix and clipping path to only show the
** desired part of the source page at the appropriate place on the
** destination page.
**
** How the tranformation matrix works:
** - Translations shall be specified as [ 1 0 0 1 tx ty ], where tx and ty
** shall be the distances to translate the origin of the coordinate system
** in the horizontal and vertical dimensions, respectively.
**
** - Scaling shall be obtained by [ sx 0 0 sy 0 0 ]. This scales the coordinates
** so that 1 unit in the horizontal and vertical dimensions of the new coordinate
** system is the same size as sx and sy units, respectively, in the previous
** coordinate system.
**
** - Rotations shall be produced by [ cos q sin q -sin q cos q 0 0 ], which has the
** effect of rotating the coordinate system axes by an angle q counter-clockwise.
**
** - Skew shall be specified by [ 1 tan a tan b 1 0 0 ], which skews the x axis by
** an angle a and the y axis by an angle b.
**
*/
wpdfbox_determine_original_source_position(box);
/*
printf("Before unrotate.\n");
printf("box->srcrot=%g\n",box->srcrot_deg);
printf("box->x0=%g, box->y0=%g\n",box->x0,box->y0);
printf("box->w=%g, box->h=%g\n",box->w,box->h);
printf("box->pw=%g, box->ph=%g\n",box->src_width_pts,box->src_height_pts);
*/
if (fabs(srcpagerot) > 1.0e-4)
wpdfbox_unrotate(box,srcpagerot);
/*
printf("box->srcrot=%g\n",box->srcrot_deg);
printf("box->x0=%g, box->y0=%g\n",box->x0,box->y0);
printf("box->w=%g, box->h=%g\n",box->w,box->h);
printf("box->pw=%g, box->ph=%g\n",box->src_width_pts,box->src_height_pts);
*/
matrix_unity(m,1.);
/*
printf("xfmatrix = [ %9.6f %9.6f %9.6f ]\n"
" [ %9.6f %9.6f %9.6f ]\n"
" [ %9.6f %9.6f %9.6f ]\n",
m[0][0],m[0][1],m[0][2],
m[1][0],m[1][1],m[1][2],
m[2][0],m[2][1],m[2][2]);
*/
matrix_translate(m1,-box->x0-srcx0,-box->y0-srcy0);
matrix_mul(m,m1);
matrix_rotate(m1,-box->srcrot_deg+box->dstrot_deg);
matrix_mul(m,m1);
matrix_unity(m1,box->scale);
matrix_mul(m,m1);
matrix_translate(m1,box->x1,box->y1);
matrix_mul(m,m1);
matrix_zero_round(m);
matrix_rotate(cpm,box->srcrot_deg);
matrix_translate(m1,box->x0+srcx0,box->y0+srcy0);
matrix_mul(cpm,m1);
/*
printf("Clip matrix:\n");
printf("xfmatrix = [ %9.6f %9.6f %9.6f ]\n"
" [ %9.6f %9.6f %9.6f ]\n"
" [ %9.6f %9.6f %9.6f ]\n",
cpm[0][0],cpm[0][1],cpm[0][2],
cpm[1][0],cpm[1][1],cpm[1][2],
cpm[2][0],cpm[2][1],cpm[2][2]);
*/
set_clip_array(xclip,yclip,box->srcrot_deg,box->w,box->h);
for (k=0;k<4;k++)
matrix_xymul(cpm,&xclip[k],&yclip[k]);
/*
printf("Clip path:\n %7.2f %7.2f\n %7.2f,%7.2f\n %7.2f,%7.2f\n"
" %7.2f %7.2f\n %7.2f,%7.2f\n",
xclip[0],yclip[0],xclip[1],yclip[1],xclip[2],yclip[2],
xclip[3],yclip[3],xclip[0],yclip[0]);
*/
strcpy(buf,"q");
for (k=0;k<=2;k++)
{
cat_pdf_double(buf,m[k][0]);
cat_pdf_double(buf,m[k][1]);
}
strcat(buf," cm");
for (k=0;k<=4;k++)
{
cat_pdf_double(buf,xclip[k&3]);
cat_pdf_double(buf,yclip[k&3]);
strcat(buf,k==0 ? " m" : " l");
}
strcat(buf," W n");
if (use_forms)
{
/* FORM METHOD */
sprintf(&buf[strlen(buf)]," /%s Do Q\n",xobject_name(box->srcbox.pageno));
if (strlen(bigbuf)+strlen(buf) > nbb)
{
int newsize;
newsize=nbb*2;
willus_mem_realloc_robust_warn((void **)&bigbuf,newsize,nbb,funcname,10);
nbb=newsize;
}
strcat(bigbuf,buf);
}
else
{
/* NO-FORMS METHOD */
strcat(buf,"\n");
/* Create new objects in document for tx matrix and restore matrix */
s1indirect = pdf_new_indirect(ctx,new_stream_object(xref,ctx,buf),0,(void *)xref);
if (qref==0)
qref=new_stream_object(xref,ctx,"Q\n");
qindirect = pdf_new_indirect(ctx,qref,0,(void *)xref);
/* Store this region into the destination page contents array */
pdf_array_push(destpagecontents,s1indirect);
if (pdf_is_array(srcpagecontents))
{
int k;
for (k=0;k<pdf_array_len(srcpagecontents);k++)
pdf_array_push(destpagecontents,pdf_array_get(srcpagecontents,k));
}
else
pdf_array_push(destpagecontents,srcpagecontents);
pdf_array_push(destpagecontents,qindirect);
pdf_drop_obj(s1indirect);
pdf_drop_obj(qindirect);
}
}
pdf_drop_obj(parent);
/* For forms, convert all original source pages to XObject Forms */
if (use_forms)
wmupdf_convert_pages_to_forms(xref,ctx,srcpageused);
/* Update page count and kids array */
countobj = pdf_new_int(ctx, pdf_array_len(kids));
pdf_dict_puts(pages, "Count", countobj);
pdf_drop_obj(countobj);
pdf_dict_puts(pages, "Kids", kids);
pdf_drop_obj(kids);
/* Also preserve the (partial) Dests name tree */
if (olddests)
wmupdf_preserve_old_dests(olddests,ctx,xref,pages);
if (use_forms)
{
/* Free memory */
willus_mem_free((double **)&bigbuf,funcname);
willus_mem_free((double **)&srcpageused,funcname);
}
return(0);
}
pdf_annot *
pdf_create_annot(fz_context *ctx, pdf_page *page, fz_annot_type type)
{
pdf_annot *annot = NULL;
pdf_document *doc = page->doc;
pdf_obj *annot_obj = pdf_new_dict(ctx, doc, 0);
pdf_obj *ind_obj = NULL;
fz_var(annot);
fz_var(ind_obj);
fz_try(ctx)
{
int ind_obj_num;
fz_rect rect = {0.0f, 0.0f, 0.0f, 0.0f};
const char *type_str;
pdf_obj *annot_arr;
type_str = pdf_string_from_annot_type(ctx, type);
if (type == PDF_ANNOT_UNKNOWN)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot create unknown annotation");
annot_arr = pdf_dict_get(ctx, page->obj, PDF_NAME_Annots);
if (annot_arr == NULL)
{
annot_arr = pdf_new_array(ctx, doc, 0);
pdf_dict_put_drop(ctx, page->obj, PDF_NAME_Annots, annot_arr);
}
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Type, PDF_NAME_Annot);
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Subtype, pdf_new_name(ctx, doc, type_str));
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &rect));
/* Make printable as default */
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_F, pdf_new_int(ctx, doc, PDF_ANNOT_IS_PRINT));
annot = pdf_new_annot(ctx, page);
annot->ap = NULL;
/*
Both annotation object and annotation structure are now created.
Insert the object in the hierarchy and the structure in the
page's array.
*/
ind_obj_num = pdf_create_object(ctx, doc);
pdf_update_object(ctx, doc, ind_obj_num, annot_obj);
ind_obj = pdf_new_indirect(ctx, doc, ind_obj_num, 0);
pdf_array_push(ctx, annot_arr, ind_obj);
annot->obj = pdf_keep_obj(ctx, ind_obj);
/*
Linking must be done after any call that might throw because
pdf_drop_annots below actually frees a list. Put the new annot
at the end of the list, so that it will be drawn last.
*/
*page->annot_tailp = annot;
page->annot_tailp = &annot->next;
doc->dirty = 1;
}
fz_always(ctx)
{
pdf_drop_obj(ctx, annot_obj);
pdf_drop_obj(ctx, ind_obj);
}
fz_catch(ctx)
{
pdf_drop_annots(ctx, annot);
fz_rethrow(ctx);
}
return annot;
}
static void retainpages(fz_context *ctx, globals *glo, int argc, char **argv)
{
pdf_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
pdf_document *doc = glo->doc;
int argidx = 0;
pdf_obj *names_list = NULL;
pdf_obj *outlines;
int pagecount;
int i;
int *page_object_nums;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root);
pages = pdf_dict_get(ctx, oldroot, PDF_NAME_Pages);
olddests = pdf_load_name_tree(ctx, doc, PDF_NAME_Dests);
outlines = pdf_dict_get(ctx, oldroot, PDF_NAME_Outlines);
root = pdf_new_dict(ctx, doc, 3);
pdf_dict_put(ctx, root, PDF_NAME_Type, pdf_dict_get(ctx, oldroot, PDF_NAME_Type));
pdf_dict_put(ctx, root, PDF_NAME_Pages, pdf_dict_get(ctx, oldroot, PDF_NAME_Pages));
pdf_dict_put(ctx, root, PDF_NAME_Outlines, outlines);
pdf_update_object(ctx, doc, pdf_to_num(ctx, oldroot), root);
/* Create a new kids array with only the pages we want to keep */
parent = pdf_new_indirect(ctx, doc, pdf_to_num(ctx, pages), pdf_to_gen(ctx, pages));
kids = pdf_new_array(ctx, doc, 1);
/* Retain pages specified */
while (argc - argidx)
{
int page, spage, epage;
char *spec, *dash;
char *pagelist = argv[argidx];
pagecount = pdf_count_pages(ctx, doc);
spec = fz_strsep(&pagelist, ",");
while (spec)
{
dash = strchr(spec, '-');
if (dash == spec)
spage = epage = pagecount;
else
spage = epage = atoi(spec);
if (dash)
{
if (strlen(dash) > 1)
epage = atoi(dash + 1);
else
epage = pagecount;
}
spage = fz_clampi(spage, 1, pagecount);
epage = fz_clampi(epage, 1, pagecount);
if (spage < epage)
for (page = spage; page <= epage; ++page)
retainpage(ctx, doc, parent, kids, page);
else
for (page = spage; page >= epage; --page)
retainpage(ctx, doc, parent, kids, page);
spec = fz_strsep(&pagelist, ",");
}
argidx++;
}
pdf_drop_obj(ctx, parent);
/* Update page count and kids array */
countobj = pdf_new_int(ctx, doc, pdf_array_len(ctx, kids));
pdf_dict_put(ctx, pages, PDF_NAME_Count, countobj);
pdf_drop_obj(ctx, countobj);
pdf_dict_put(ctx, pages, PDF_NAME_Kids, kids);
pdf_drop_obj(ctx, kids);
/* Force the next call to pdf_count_pages to recount */
glo->doc->page_count = 0;
pagecount = pdf_count_pages(ctx, doc);
page_object_nums = fz_calloc(ctx, pagecount, sizeof(*page_object_nums));
for (i = 0; i < pagecount; i++)
{
pdf_obj *pageref = pdf_lookup_page_obj(ctx, doc, i);
page_object_nums[i] = pdf_to_num(ctx, pageref);
}
/* If we had an old Dests tree (now reformed as an olddests
* dictionary), keep any entries in there that point to
* valid pages. This may mean we keep more than we need, but
* it's safe at least. */
if (olddests)
{
pdf_obj *names = pdf_new_dict(ctx, doc, 1);
pdf_obj *dests = pdf_new_dict(ctx, doc, 1);
int len = pdf_dict_len(ctx, olddests);
names_list = pdf_new_array(ctx, doc, 32);
for (i = 0; i < len; i++)
{
pdf_obj *key = pdf_dict_get_key(ctx, olddests, i);
pdf_obj *val = pdf_dict_get_val(ctx, olddests, i);
pdf_obj *dest = pdf_dict_get(ctx, val, PDF_NAME_D);
dest = pdf_array_get(ctx, dest ? dest : val, 0);
if (dest_is_valid_page(ctx, dest, page_object_nums, pagecount))
{
pdf_obj *key_str = pdf_new_string(ctx, doc, pdf_to_name(ctx, key), strlen(pdf_to_name(ctx, key)));
pdf_array_push(ctx, names_list, key_str);
pdf_array_push(ctx, names_list, val);
pdf_drop_obj(ctx, key_str);
}
}
pdf_dict_put(ctx, dests, PDF_NAME_Names, names_list);
pdf_dict_put(ctx, names, PDF_NAME_Dests, dests);
pdf_dict_put(ctx, root, PDF_NAME_Names, names);
pdf_drop_obj(ctx, names);
pdf_drop_obj(ctx, dests);
pdf_drop_obj(ctx, olddests);
}
/* Edit each pages /Annot list to remove any links that point to
* nowhere. */
for (i = 0; i < pagecount; i++)
{
pdf_obj *pageref = pdf_lookup_page_obj(ctx, doc, i);
pdf_obj *pageobj = pdf_resolve_indirect(ctx, pageref);
pdf_obj *annots = pdf_dict_get(ctx, pageobj, PDF_NAME_Annots);
int len = pdf_array_len(ctx, annots);
int j;
for (j = 0; j < len; j++)
{
pdf_obj *o = pdf_array_get(ctx, annots, j);
if (!pdf_name_eq(ctx, pdf_dict_get(ctx, o, PDF_NAME_Subtype), PDF_NAME_Link))
continue;
if (!dest_is_valid(ctx, o, pagecount, page_object_nums, names_list))
{
/* Remove this annotation */
pdf_array_delete(ctx, annots, j);
j--;
}
}
}
if (strip_outlines(ctx, doc, outlines, pagecount, page_object_nums, names_list) == 0)
{
pdf_dict_del(ctx, root, PDF_NAME_Outlines);
}
fz_free(ctx, page_object_nums);
pdf_drop_obj(ctx, names_list);
pdf_drop_obj(ctx, root);
}
static void retainpages(int argc, char **argv)
{
pdf_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = pdf_dict_gets(xref->trailer, "Root");
pages = pdf_dict_gets(oldroot, "Pages");
olddests = pdf_load_name_tree(xref, "Dests");
root = pdf_new_dict(ctx, 2);
pdf_dict_puts(root, "Type", pdf_dict_gets(oldroot, "Type"));
pdf_dict_puts(root, "Pages", pdf_dict_gets(oldroot, "Pages"));
pdf_update_object(xref, pdf_to_num(oldroot), root);
pdf_drop_obj(root);
/* Create a new kids array with only the pages we want to keep */
parent = pdf_new_indirect(ctx, pdf_to_num(pages), pdf_to_gen(pages), xref);
kids = pdf_new_array(ctx, 1);
/* Retain pages specified */
while (argc - fz_optind)
{
int page, spage, epage, pagecount;
char *spec, *dash;
char *pagelist = argv[fz_optind];
pagecount = pdf_count_pages(xref);
spec = fz_strsep(&pagelist, ",");
while (spec)
{
dash = strchr(spec, '-');
if (dash == spec)
spage = epage = pagecount;
else
spage = epage = atoi(spec);
if (dash)
{
if (strlen(dash) > 1)
epage = atoi(dash + 1);
else
epage = pagecount;
}
if (spage > epage)
page = spage, spage = epage, epage = page;
spage = fz_clampi(spage, 1, pagecount);
epage = fz_clampi(epage, 1, pagecount);
for (page = spage; page <= epage; page++)
{
pdf_obj *pageobj = xref->page_objs[page-1];
pdf_obj *pageref = xref->page_refs[page-1];
pdf_dict_puts(pageobj, "Parent", parent);
/* Store page object in new kids array */
pdf_array_push(kids, pageref);
}
spec = fz_strsep(&pagelist, ",");
}
fz_optind++;
}
pdf_drop_obj(parent);
/* Update page count and kids array */
countobj = pdf_new_int(ctx, pdf_array_len(kids));
pdf_dict_puts(pages, "Count", countobj);
pdf_drop_obj(countobj);
pdf_dict_puts(pages, "Kids", kids);
pdf_drop_obj(kids);
/* Also preserve the (partial) Dests name tree */
if (olddests)
{
int i;
pdf_obj *names = pdf_new_dict(ctx, 1);
pdf_obj *dests = pdf_new_dict(ctx, 1);
pdf_obj *names_list = pdf_new_array(ctx, 32);
int len = pdf_dict_len(olddests);
for (i = 0; i < len; i++)
{
pdf_obj *key = pdf_dict_get_key(olddests, i);
pdf_obj *val = pdf_dict_get_val(olddests, i);
pdf_obj *key_str = pdf_new_string(ctx, pdf_to_name(key), strlen(pdf_to_name(key)));
pdf_obj *dest = pdf_dict_gets(val, "D");
dest = pdf_array_get(dest ? dest : val, 0);
if (pdf_array_contains(pdf_dict_gets(pages, "Kids"), dest))
{
pdf_array_push(names_list, key_str);
pdf_array_push(names_list, val);
}
pdf_drop_obj(key_str);
}
root = pdf_dict_gets(xref->trailer, "Root");
pdf_dict_puts(dests, "Names", names_list);
pdf_dict_puts(names, "Dests", dests);
pdf_dict_puts(root, "Names", names);
pdf_drop_obj(names);
pdf_drop_obj(dests);
pdf_drop_obj(names_list);
pdf_drop_obj(olddests);
}
}
pdf_obj *
pdf_new_xobject(pdf_document *doc, const fz_rect *bbox, const fz_matrix *mat)
{
int idict_num;
pdf_obj *idict = NULL;
pdf_obj *dict = NULL;
pdf_xobject *form = NULL;
pdf_obj *obj = NULL;
pdf_obj *res = NULL;
pdf_obj *procset = NULL;
fz_context *ctx = doc->ctx;
fz_var(idict);
fz_var(dict);
fz_var(form);
fz_var(obj);
fz_var(res);
fz_var(procset);
fz_try(ctx)
{
dict = pdf_new_dict(doc, 0);
obj = pdf_new_rect(doc, bbox);
pdf_print_obj(obj);
pdf_dict_puts(dict, "BBox", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_int(doc, 1);
pdf_dict_puts(dict, "FormType", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_int(doc, 0);
pdf_dict_puts(dict, "Length", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_matrix(doc, mat);
pdf_dict_puts(dict, "Matrix", obj);
pdf_drop_obj(obj);
obj = NULL;
res = pdf_new_dict(doc, 0);
procset = pdf_new_array(doc, 2);
obj = pdf_new_name(doc, "PDF");
pdf_array_push(procset, obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_name(doc, "Text");
pdf_array_push(procset, obj);
pdf_drop_obj(obj);
obj = NULL;
pdf_dict_puts(res, "ProcSet", procset);
pdf_drop_obj(procset);
procset = NULL;
pdf_dict_puts(dict, "Resources", res);
obj = pdf_new_name(doc, "Form");
pdf_dict_puts(dict, "Subtype", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_name(doc, "XObject");
pdf_dict_puts(dict, "Type", obj);
pdf_drop_obj(obj);
obj = NULL;
form = fz_malloc_struct(ctx, pdf_xobject);
FZ_INIT_STORABLE(form, 1, pdf_free_xobject_imp);
form->resources = NULL;
form->contents = NULL;
form->colorspace = NULL;
form->me = NULL;
form->iteration = 0;
form->bbox = *bbox;
form->matrix = *mat;
form->isolated = 0;
form->knockout = 0;
form->transparency = 0;
form->resources = res;
res = NULL;
idict_num = pdf_create_object(doc);
pdf_update_object(doc, idict_num, dict);
idict = pdf_new_indirect(doc, idict_num, 0);
pdf_drop_obj(dict);
dict = NULL;
pdf_store_item(ctx, idict, form, pdf_xobject_size(form));
form->contents = pdf_keep_obj(idict);
form->me = pdf_keep_obj(idict);
pdf_drop_xobject(ctx, form);
form = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(procset);
pdf_drop_obj(res);
pdf_drop_obj(obj);
pdf_drop_obj(dict);
pdf_drop_obj(idict);
pdf_drop_xobject(ctx, form);
fz_rethrow_message(ctx, "failed to create xobject)");
}
return idict;
}
static void decimatepages(fz_context *ctx, pdf_document *doc)
{
pdf_obj *oldroot, *root, *pages, *kids, *parent;
int num_pages = pdf_count_pages(ctx, doc);
int page, kidcount;
oldroot = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root);
pages = pdf_dict_get(ctx, oldroot, PDF_NAME_Pages);
root = pdf_new_dict(ctx, doc, 2);
pdf_dict_put(ctx, root, PDF_NAME_Type, pdf_dict_get(ctx, oldroot, PDF_NAME_Type));
pdf_dict_put(ctx, root, PDF_NAME_Pages, pdf_dict_get(ctx, oldroot, PDF_NAME_Pages));
pdf_update_object(ctx, doc, pdf_to_num(ctx, oldroot), root);
pdf_drop_obj(ctx, root);
/* Create a new kids array with our new pages in */
parent = pdf_new_indirect(ctx, doc, pdf_to_num(ctx, pages), pdf_to_gen(ctx, pages));
kids = pdf_new_array(ctx, doc, 1);
kidcount = 0;
for (page=0; page < num_pages; page++)
{
pdf_page *page_details = pdf_load_page(ctx, doc, page);
int xf = x_factor, yf = y_factor;
int x, y;
float w = page_details->mediabox.x1 - page_details->mediabox.x0;
float h = page_details->mediabox.y1 - page_details->mediabox.y0;
if (xf == 0 && yf == 0)
{
/* Nothing specified, so split along the long edge */
if (w > h)
xf = 2, yf = 1;
else
xf = 1, yf = 2;
}
else if (xf == 0)
xf = 1;
else if (yf == 0)
yf = 1;
for (y = yf-1; y >= 0; y--)
{
for (x = 0; x < xf; x++)
{
pdf_obj *newpageobj, *newpageref, *newmediabox;
fz_rect mb;
int num;
newpageobj = pdf_copy_dict(ctx, pdf_lookup_page_obj(ctx, doc, page));
num = pdf_create_object(ctx, doc);
pdf_update_object(ctx, doc, num, newpageobj);
newpageref = pdf_new_indirect(ctx, doc, num, 0);
newmediabox = pdf_new_array(ctx, doc, 4);
mb.x0 = page_details->mediabox.x0 + (w/xf)*x;
if (x == xf-1)
mb.x1 = page_details->mediabox.x1;
else
mb.x1 = page_details->mediabox.x0 + (w/xf)*(x+1);
mb.y0 = page_details->mediabox.y0 + (h/yf)*y;
if (y == yf-1)
mb.y1 = page_details->mediabox.y1;
else
mb.y1 = page_details->mediabox.y0 + (h/yf)*(y+1);
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.x0));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.y0));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.x1));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.y1));
pdf_dict_put(ctx, newpageobj, PDF_NAME_Parent, parent);
pdf_dict_put(ctx, newpageobj, PDF_NAME_MediaBox, newmediabox);
/* Store page object in new kids array */
pdf_array_push(ctx, kids, newpageref);
kidcount++;
}
}
}
pdf_drop_obj(ctx, parent);
/* Update page count and kids array */
pdf_dict_put(ctx, pages, PDF_NAME_Count, pdf_new_int(ctx, doc, kidcount));
pdf_dict_put(ctx, pages, PDF_NAME_Kids, kids);
pdf_drop_obj(ctx, kids);
}
pdf_annot *
pdf_create_annot(fz_context *ctx, pdf_document *doc, pdf_page *page, fz_annot_type type)
{
pdf_annot *annot = NULL;
pdf_obj *annot_obj = pdf_new_dict(ctx, doc, 0);
pdf_obj *ind_obj = NULL;
fz_var(annot);
fz_var(ind_obj);
fz_try(ctx)
{
int ind_obj_num;
fz_rect rect = {0.0, 0.0, 0.0, 0.0};
const char *type_str = annot_type_str(type);
pdf_obj *annot_arr = pdf_dict_get(ctx, page->me, PDF_NAME_Annots);
if (annot_arr == NULL)
{
annot_arr = pdf_new_array(ctx, doc, 0);
pdf_dict_put_drop(ctx, page->me, PDF_NAME_Annots, annot_arr);
}
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Type, PDF_NAME_Annot);
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Subtype, pdf_new_name(ctx, doc, type_str));
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &rect));
/* Make printable as default */
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_F, pdf_new_int(ctx, doc, F_Print));
annot = fz_malloc_struct(ctx, pdf_annot);
annot->page = page;
annot->rect = rect;
annot->pagerect = rect;
annot->ap = NULL;
annot->widget_type = PDF_WIDGET_TYPE_NOT_WIDGET;
annot->annot_type = type;
/*
Both annotation object and annotation structure are now created.
Insert the object in the hierarchy and the structure in the
page's array.
*/
ind_obj_num = pdf_create_object(ctx, doc);
pdf_update_object(ctx, doc, ind_obj_num, annot_obj);
ind_obj = pdf_new_indirect(ctx, doc, ind_obj_num, 0);
pdf_array_push(ctx, annot_arr, ind_obj);
annot->obj = pdf_keep_obj(ctx, ind_obj);
/*
Linking must be done after any call that might throw because
pdf_drop_annot below actually frees a list. Put the new annot
at the end of the list, so that it will be drawn last.
*/
*page->annot_tailp = annot;
page->annot_tailp = &annot->next;
doc->dirty = 1;
}
fz_always(ctx)
{
pdf_drop_obj(ctx, annot_obj);
pdf_drop_obj(ctx, ind_obj);
}
fz_catch(ctx)
{
pdf_drop_annot(ctx, annot);
fz_rethrow(ctx);
}
return annot;
}
void
pdf_delete_annot(fz_context *ctx, pdf_document *doc, pdf_page *page, pdf_annot *annot)
{
pdf_annot **annotptr;
pdf_obj *old_annot_arr;
pdf_obj *annot_arr;
if (annot == NULL)
return;
/* Remove annot from page's list */
for (annotptr = &page->annots; *annotptr; annotptr = &(*annotptr)->next)
{
if (*annotptr == annot)
break;
}
/* Check the passed annotation was of this page */
if (*annotptr == NULL)
return;
*annotptr = annot->next;
/* If the removed annotation was the last in the list adjust the end pointer */
if (*annotptr == NULL)
page->annot_tailp = annotptr;
/* Stick it in the deleted list */
annot->next = page->deleted_annots;
page->deleted_annots = annot;
pdf_drop_xobject(ctx, annot->ap);
annot->ap = NULL;
/* Recreate the "Annots" array with this annot removed */
old_annot_arr = pdf_dict_get(ctx, page->me, PDF_NAME_Annots);
if (old_annot_arr)
{
int i, n = pdf_array_len(ctx, old_annot_arr);
annot_arr = pdf_new_array(ctx, doc, n?(n-1):0);
fz_try(ctx)
{
for (i = 0; i < n; i++)
{
pdf_obj *obj = pdf_array_get(ctx, old_annot_arr, i);
if (obj != annot->obj)
pdf_array_push(ctx, annot_arr, obj);
}
if (pdf_is_indirect(ctx, old_annot_arr))
pdf_update_object(ctx, doc, pdf_to_num(ctx, old_annot_arr), annot_arr);
else
pdf_dict_put(ctx, page->me, PDF_NAME_Annots, annot_arr);
if (pdf_is_indirect(ctx, annot->obj))
pdf_delete_object(ctx, doc, pdf_to_num(ctx, annot->obj));
}
fz_always(ctx)
{
pdf_drop_obj(ctx, annot_arr);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
pdf_drop_obj(ctx, annot->obj);
annot->obj = NULL;
doc->dirty = 1;
}
pdf_obj *
pdf_parse_array(pdf_document *xref, fz_stream *file, pdf_lexbuf *buf)
{
pdf_obj *ary = NULL;
pdf_obj *obj = NULL;
int a = 0, b = 0, n = 0;
int tok;
fz_context *ctx = file->ctx;
pdf_obj *op;
fz_var(obj);
ary = pdf_new_array(ctx, 4);
fz_try(ctx)
{
while (1)
{
tok = pdf_lex(file, buf);
if (tok != PDF_TOK_INT && tok != PDF_TOK_R)
{
if (n > 0)
{
obj = pdf_new_int(ctx, a);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
}
if (n > 1)
{
obj = pdf_new_int(ctx, b);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
}
n = 0;
}
if (tok == PDF_TOK_INT && n == 2)
{
obj = pdf_new_int(ctx, a);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
a = b;
n --;
}
switch (tok)
{
case PDF_TOK_CLOSE_ARRAY:
op = ary;
goto end;
case PDF_TOK_INT:
if (n == 0)
a = buf->i;
if (n == 1)
b = buf->i;
n ++;
break;
case PDF_TOK_R:
if (n != 2)
fz_throw(ctx, "cannot parse indirect reference in array");
obj = pdf_new_indirect(ctx, a, b, xref);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
n = 0;
break;
case PDF_TOK_OPEN_ARRAY:
obj = pdf_parse_array(xref, file, buf);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_OPEN_DICT:
obj = pdf_parse_dict(xref, file, buf);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_NAME:
obj = fz_new_name(ctx, buf->scratch);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_REAL:
obj = pdf_new_real(ctx, buf->f);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_STRING:
obj = pdf_new_string(ctx, buf->scratch, buf->len);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_TRUE:
obj = pdf_new_bool(ctx, 1);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_FALSE:
obj = pdf_new_bool(ctx, 0);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
case PDF_TOK_NULL:
obj = pdf_new_null(ctx);
pdf_array_push(ary, obj);
pdf_drop_obj(obj);
obj = NULL;
break;
default:
fz_throw(ctx, "cannot parse token in array");
}
}
end:
{}
}
fz_catch(ctx)
{
pdf_drop_obj(obj);
pdf_drop_obj(ary);
fz_throw(ctx, "cannot parse array");
}
return op;
}
static void decimatepages(pdf_document *xref)
{
pdf_obj *oldroot, *root, *pages, *kids, *parent;
fz_context *ctx = xref->ctx;
int num_pages = pdf_count_pages(xref);
int page, kidcount;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = pdf_dict_gets(pdf_trailer(xref), "Root");
pages = pdf_dict_gets(oldroot, "Pages");
root = pdf_new_dict(ctx, 2);
pdf_dict_puts(root, "Type", pdf_dict_gets(oldroot, "Type"));
pdf_dict_puts(root, "Pages", pdf_dict_gets(oldroot, "Pages"));
pdf_update_object(xref, pdf_to_num(oldroot), root);
pdf_drop_obj(root);
/* Create a new kids array with only the pages we want to keep */
parent = pdf_new_indirect(ctx, pdf_to_num(pages), pdf_to_gen(pages), xref);
kids = pdf_new_array(ctx, 1);
kidcount = 0;
for (page=0; page < num_pages; page++)
{
pdf_page *page_details = pdf_load_page(xref, page);
int xf = x_factor, yf = y_factor;
int x, y;
float w = page_details->mediabox.x1 - page_details->mediabox.x0;
float h = page_details->mediabox.y1 - page_details->mediabox.y0;
if (xf == 0 && yf == 0)
{
/* Nothing specified, so split along the long edge */
if (w > h)
xf = 2, yf = 1;
else
xf = 1, yf = 2;
}
else if (xf == 0)
xf = 1;
else if (yf == 0)
yf = 1;
for (y = yf-1; y >= 0; y--)
{
for (x = 0; x < xf; x++)
{
pdf_obj *newpageobj, *newpageref, *newmediabox;
fz_rect mb;
int num;
newpageobj = pdf_copy_dict(ctx, xref->page_objs[page]);
num = pdf_create_object(xref);
pdf_update_object(xref, num, newpageobj);
newpageref = pdf_new_indirect(ctx, num, 0, xref);
newmediabox = pdf_new_array(ctx, 4);
mb.x0 = page_details->mediabox.x0 + (w/xf)*x;
if (x == xf-1)
mb.x1 = page_details->mediabox.x1;
else
mb.x1 = page_details->mediabox.x0 + (w/xf)*(x+1);
mb.y0 = page_details->mediabox.y0 + (h/yf)*y;
if (y == yf-1)
mb.y1 = page_details->mediabox.y1;
else
mb.y1 = page_details->mediabox.y0 + (h/yf)*(y+1);
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.x0));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.y0));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.x1));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.y1));
pdf_dict_puts(newpageobj, "Parent", parent);
pdf_dict_puts(newpageobj, "MediaBox", newmediabox);
/* Store page object in new kids array */
pdf_array_push(kids, newpageref);
kidcount++;
}
}
}
pdf_drop_obj(parent);
/* Update page count and kids array */
pdf_dict_puts(pages, "Count", pdf_new_int(ctx, kidcount));
pdf_dict_puts(pages, "Kids", kids);
pdf_drop_obj(kids);
}
