[gtk/wip/otte/win32-cleanup: 16/19] gl: Disable depth test

[Benjamin Otte <otte src gnome org>]

commit 97974f308ecf6c4920c4d4ebfa84149b16e0f054
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);