[gtk/wip/otte/win32-cleanup] gl: Disable depth test

[Benjamin Otte <otte src gnome org>]

commit 7e1e713a096d30501fab3ffbb8aeae3b78302f2b
Author: Benjamin Otte <otte redhat com>
Date:   Thu Jul 29 06:23:02 2021 +0200

    gl: Disable depth test
    
    Usually, the GdkGLContext will have the depth buffer disabled, so the
    depth test will not work. However, if the GDK backend does not provide a
    config without depth buffer, there will be one.
    
    And if we enable it, it'll do the wrong thing.
    
    For example, it'll paint the wrong thing in the cube flip animation of
    GtkStack (like on widget-factory page 2).

 gsk/gl/gskglrenderer.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index a801f55ab3..cb7a633977 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -4289,8 +4289,7 @@ gsk_gl_renderer_do_render (GskRenderer           *renderer,
   gsk_gl_renderer_setup_render_mode (self);
   gsk_gl_renderer_clear (self);
 
-  glEnable (GL_DEPTH_TEST);
-  glDepthFunc (GL_LEQUAL);
+  glDisable (GL_DEPTH_TEST);
 
   /* Pre-multiplied alpha! */
   glEnable (GL_BLEND);