Add "scale to fit height/width" options to a new Content menu.

Requested-by: Johan Malmsten

2 files changed, 31 insertions, 0 deletions

diff --git a/src/lib/video_content.cc b/src/lib/video_content.cc
index ec5890b45..6f6b2c441 100644
--- a/src/lib/video_content.cc
+++ b/src/lib/video_content.cc
@@ -46,6 +46,8 @@ using std::stringstream;
 using std::setprecision;
 using std::cout;
 using std::vector;
+using std::min;
+using std::max;
 using boost::shared_ptr;
 using boost::optional;
 using boost::dynamic_pointer_cast;
@@ -377,6 +379,32 @@ VideoContent::time_to_content_video_frames (Time t) const
 	return t * film->video_frame_rate() / (frc.factor() * TIME_HZ);
 }
 
+void
+VideoContent::scale_and_crop_to_fit_width ()
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+
+	set_scale (VideoContentScale (film->container ()));
+
+	int const crop = max (0, int (video_size().height - double (film->frame_size().height) * video_size().width / film->frame_size().width));
+	set_top_crop (crop / 2);
+	set_bottom_crop (crop / 2);
+}
+
+void
+VideoContent::scale_and_crop_to_fit_height ()
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+
+	set_scale (VideoContentScale (film->container ()));
+
+	int const crop = max (0, int (video_size().width - double (film->frame_size().width) * video_size().height / film->frame_size().height));
+	set_left_crop (crop / 2);
+	set_right_crop (crop / 2);
+}
+
 VideoContentScale::VideoContentScale (Ratio const * r)
 	: _ratio (r)
 	, _scale (true)
diff --git a/src/lib/video_content.h b/src/lib/video_content.h
index fbba9c09d..f23bf0abe 100644
--- a/src/lib/video_content.h
+++ b/src/lib/video_content.h
@@ -171,6 +171,9 @@ public:
 
 	VideoContent::Frame time_to_content_video_frames (Time) const;
 
+	void scale_and_crop_to_fit_width ();
+	void scale_and_crop_to_fit_height ();
+
 protected:
 	void take_from_video_examiner (boost::shared_ptr<VideoExaminer>);