Some const correctness.

[dcpomatic.git] / src / lib / combiner.cc

diff --git a/src/lib/combiner.cc b/src/lib/combiner.cc
index 0a9eaf6b60bf8e12d2689ade030c7f16c50f0081..250528aeb91e61d1b4bcd47a20406528e6976927 100644 (file)
--- a/src/lib/combiner.cc
+++ b/src/lib/combiner.cc
@@ -33,9 +33,9 @@ Combiner::Combiner (shared_ptr<Log> log)
  *  @param image Frame image.
  */
 void
-Combiner::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle>, double)
+Combiner::process_video (shared_ptr<const Image> image, bool, shared_ptr<Subtitle>, double)
 {
-       _image = image;
+       _image = image->clone ();
 }
 
 /** Process video for the right half of the frame.
@@ -43,7 +43,7 @@ Combiner::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle>, do
  *  @param sub Subtitle (which will be put onto the whole frame)
  */
 void
-Combiner::process_video_b (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub, double t)
+Combiner::process_video_b (shared_ptr<const Image> image, bool, shared_ptr<Subtitle> sub, double t)
 {
        /* Copy the right half of this image into our _image */
        /* XXX: this should probably be in the Image class */