From e00e081111d62520c345bcd43b9df2639553f21f Mon Sep 17 00:00:00 2001
From: sorayuki <sorayuki@live.com>
Date: Sat, 24 Feb 2018 11:24:26 +0800
Subject: [PATCH] image-source: Fade to transparency if slideshow list is
 cleared

Fixes a bug where the last image would be permanently shown if the user
clears the file list of a slideshow source.

Closes jp9000/obs-studio#1206
---
 plugins/image-source/obs-slideshow.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/plugins/image-source/obs-slideshow.c b/plugins/image-source/obs-slideshow.c
index e805d69b6..e8316e93f 100644
--- a/plugins/image-source/obs-slideshow.c
+++ b/plugins/image-source/obs-slideshow.c
@@ -657,6 +657,20 @@ static void ss_video_tick(void *data, float seconds)
 	if (ss->pause_on_deactivate || ss->manual || ss->stop || ss->paused)
 		return;
 
+	/* ----------------------------------------------------- */
+	/* fade to transparency when the file list becomes empty */
+	if (!ss->files.num) {
+		obs_source_t* active_transition_source =
+			obs_transition_get_active_source(ss->transition);
+
+		if (active_transition_source) {
+			obs_source_release(active_transition_source);
+			do_transition(ss, true);
+		}
+	}
+
+	/* ----------------------------------------------------- */
+	/* do transition when slide time reached                 */
 	ss->elapsed += seconds;
 
 	if (ss->elapsed > ss->slide_time) {