From d2baaaa7df87eba9566fb935eeab5bd0af80fe1b Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sat, 19 Dec 2015 09:30:20 +0100
Subject: vo_opengl: cocoa: implement alpha window support

With --vo=opengl:alpha=yes, the Cocoa backend will now render alpha
video without background.
---
 video/out/cocoa_common.m | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'video/out/cocoa_common.m')

diff --git a/video/out/cocoa_common.m b/video/out/cocoa_common.m
index 2cb365cc1f..b88d42ae19 100644
--- a/video/out/cocoa_common.m
+++ b/video/out/cocoa_common.m
@@ -591,6 +591,12 @@ int vo_cocoa_config_window(struct vo *vo)
             cocoa_add_fs_screen_profile_observer(vo);
             cocoa_set_window_title(vo);
             vo_set_level(vo, vo->opts->ontop);
+
+            GLint o;
+            if (!CGLGetParameter(s->cgl_ctx, kCGLCPSurfaceOpacity, &o) && !o) {
+                [s->window setOpaque:NO];
+                [s->window setBackgroundColor:[NSColor clearColor]];
+            }
         }
 
         s->vo_ready = true;
-- 
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