Add precheck streams capability

When requested, QPDFWriter will do more aggress prechecking of streams
to make sure it can actually succeed in decoding them before
attempting to do so. This will allow preservation of raw data even
when the raw data is corrupted relative to the specified filters.

1 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 119a4c6c..026833d4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2017-07-27  Jay Berkenbilt  <ejb@ql.org>
 
+	* Add --precheck-streams command-line option and setStreamPrecheck
+	option to QPDFWriter to tell QPDFWriter to attempt decoding a
+	stream fully before deciding whether to filter it or not.
+
 	* Recover gracefully from streams that aren't filterable because
 	the filter parameters are invalid in the stream dictionary or the
 	dictionary itself is invalid.