[gtk/wip/chergert/gdk-macos-for-master] macos: use NSOpenGLContext directly for current tracking

[Christian Hergert <chergert src gnome org>]

commit 90141ef30554b358ac8da3379ac2822600cb4ea1
Author: Christian Hergert <chergert redhat com>
Date:   Thu Nov 5 13:57:41 2020 -0800

    macos: use NSOpenGLContext directly for current tracking
    
    We don't need to interact with GdkGLContext here to keep the
    current context active.

 gdk/macos/gdkmacosglcontext.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gdk/macos/gdkmacosglcontext.c b/gdk/macos/gdkmacosglcontext.c
index df8f66b136..c01ec28937 100644
--- a/gdk/macos/gdkmacosglcontext.c
+++ b/gdk/macos/gdkmacosglcontext.c
@@ -175,7 +175,7 @@ gdk_macos_gl_context_real_realize (GdkGLContext  *context,
   NSOpenGLPixelFormat *pixelFormat;
   GdkGLContext *shared;
   GdkGLContext *shared_data;
-  GdkGLContext *existing;
+  NSOpenGLContext *existing;
   GLint sync_to_framerate = 1;
   GLint validate = 0;
   int major, minor;
@@ -185,7 +185,7 @@ gdk_macos_gl_context_real_realize (GdkGLContext  *context,
   if (self->gl_context != nil)
     return TRUE;
 
-  existing = gdk_gl_context_get_current ();
+  existing = [NSOpenGLContext currentContext];
 
   gdk_gl_context_get_required_version (context, &major, &minor);
 
@@ -249,7 +249,7 @@ gdk_macos_gl_context_real_realize (GdkGLContext  *context,
   self->gl_context = g_steal_pointer (&gl_context);
 
   if (existing != NULL)
-    [GDK_MACOS_GL_CONTEXT (existing)->gl_context makeCurrentContext];
+    [existing makeCurrentContext];
 
   return TRUE;
 }