C++ (Cpp) pdf_add_object_drop Examples

Example #1

File: pdfmerge.c Project: gavanx/mupdf-1.9a-source

static void page_merge(int page_from, int page_to, pdf_graft_map *graft_map)
{
	pdf_obj *pageref = NULL;
	pdf_obj *page_dict;
	pdf_obj *obj = NULL, *ref = NULL;
	/* Include minimal number of objects for page.  Do not include items that
	 * reference other pages */
	pdf_obj *known_page_objs[] = { 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};
	int n = nelem(known_page_objs);
	int i;
	int num;

	fz_var(obj);
	fz_var(ref);

	fz_try(ctx)
	{
		pageref = pdf_lookup_page_obj(ctx, doc_src, page_from - 1);

		/* Make a new dictionary and copy over the items from the source object to
		* the new dict that we want to deep copy. */
		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 < n; i++)
		{
			obj = pdf_dict_get(ctx, pageref, known_page_objs[i]);
			if (obj != NULL)
				pdf_dict_put_drop(ctx, page_dict, known_page_objs[i], pdf_graft_object(ctx, doc_des, doc_src, obj, graft_map));
		}

		/* Add the dictionary */
		obj = pdf_add_object_drop(ctx, doc_des, page_dict);

		/* Get indirect ref */
		num = pdf_to_num(ctx, obj);
		ref = pdf_new_indirect(ctx, doc_des, num, 0);

		/* Insert */
		pdf_insert_page(ctx, doc_des, page_to - 1, ref);
	}
	fz_always(ctx)
	{
		pdf_drop_obj(ctx, obj);
		pdf_drop_obj(ctx, ref);
	}
	fz_catch(ctx)
	{
		fz_rethrow(ctx);
	}
}

Example #2

File: pdfmerge.c Project: muennich/mupdf

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(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_mapped_object(ctx, graft_map, obj));
		}

		/* 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);
	}
}