cocoa: handle failure on pixel format creation

This didn't make any difference on with OpenGL 2.1, but with the
introduction of OpenGL3.2 it's possible for the pixel format creation to
fail (if OpenGL3.2 is not supported).

This code handles the failure case accordingly.

1 files changed, 6 insertions, 0 deletions

diff --git a/libvo/cocoa_common.m b/libvo/cocoa_common.m
index 66f4cd3937..04b325405b 100644
--- a/libvo/cocoa_common.m
+++ b/libvo/cocoa_common.m
@@ -257,6 +257,12 @@ int vo_cocoa_create_window(struct vo *vo, uint32_t d_width,
         attr[i] = (NSOpenGLPixelFormatAttribute)0;
 
         s->pixelFormat = [[[NSOpenGLPixelFormat alloc] initWithAttributes:attr] autorelease];
+        if (!s->pixelFormat) {
+            mp_msg(MSGT_VO, MSGL_ERR,
+                "[cocoa] Invalid pixel format attribute "
+                "(GL3 not supported?)\n");
+            return -1;
+        }
         s->glContext = [[NSOpenGLContext alloc] initWithFormat:s->pixelFormat shareContext:nil];
 
         create_menu();