From 2d6ab4c707f6a6cc4360260d9a9a93b0c9ba4b10 Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <robin.haberkorn@googlemail.com>
Date: Sun, 16 Sep 2012 15:35:44 +0200
Subject: video layers: lock when accessing surface

---
 main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/main.c b/main.c
index 9d245f5..e841299 100644
--- a/main.c
+++ b/main.c
@@ -527,10 +527,12 @@ layer_video_alpha(struct layer_video *ctx, float opacity)
 {
 	Uint8 alpha = (Uint8)ceilf(opacity*SDL_ALPHA_OPAQUE);
 
+	SDL_LockMutex(ctx->mutex);
 	if (alpha == SDL_ALPHA_OPAQUE)
 		SDL_SetAlpha(ctx->surf, 0, 0);
 	else
 		SDL_SetAlpha(ctx->surf, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
+	SDL_UnlockMutex(ctx->mutex);
 }
 
 static void
-- 
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