LinGui: add pref option to scale down high def previews

when this option is enabled, if the preview dims are above a threshold
then the size is scaled down to no larger than 1280x720.
1080p previews are too big for my laptop :-P


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@1846 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 18 insertions, 0 deletions

diff --git a/gtk/src/hb-backend.c b/gtk/src/hb-backend.c
index b69083818..98c27dc20 100644
--- a/gtk/src/hb-backend.c
+++ b/gtk/src/hb-backend.c
@@ -3453,6 +3453,9 @@ ghb_pause_queue()
     }
 }
 
+#define RED_HEIGHT	720.0
+#define RED_WIDTH	1280.0
+
 GdkPixbuf*
 ghb_get_preview_image(
 	gint titleindex, 
@@ -3589,6 +3592,21 @@ ghb_get_preview_image(
 		else
 			dstHeight = dstHeight * par_height / par_width;
 	}
+	if (ghb_settings_get_boolean(settings, "reduce_hd_preview"))
+	{
+		gdouble factor = 1.0;
+
+		if (dstHeight > RED_HEIGHT)
+		{
+			factor = RED_HEIGHT / (gdouble)dstHeight;
+		}
+		if (dstWidth * factor > RED_WIDTH)
+		{
+			factor = RED_WIDTH / (gdouble)dstWidth;
+		}
+		dstHeight = dstHeight * factor + 0.5;
+		dstWidth = dstWidth * factor + 0.5;
+	}
 	
 	g_debug("scaled %d x %d\n", dstWidth, dstHeight);
 	GdkPixbuf *scaled_preview;