truncate the xref after compacting

pdf_write_document still writes the entire xref with references to all
freed objects even if the xref has been compacted which makes the
result of mutool clean -ggg larger than necessary.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/pdf/pdf-write.c b/source/pdf/pdf-write.c
index f218429d..dea21801 100644
--- a/source/pdf/pdf-write.c
+++ b/source/pdf/pdf-write.c
@@ -2652,6 +2652,11 @@ void pdf_write_document(pdf_document *doc, char *filename, fz_write_options *fz_
 		if (opts.do_garbage >= 2 || opts.do_linear)
 			renumberobjs(doc, &opts);
 
+		/* Truncate the xref after compacting and renumbering */
+		if (opts.do_garbage >= 2 && !opts.do_incremental)
+			while (xref_len > 0 && !opts.use_list[xref_len-1])
+				xref_len--;
+
 		if (opts.do_linear)
 		{
 			linearize(doc, &opts);