[mutter/gbsneto/clutter-cleanups: 1/10] clutter/main: Remove shader stack

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 83151c37c6791b07707104965b673e6f768eec15
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sun Jun 30 16:43:00 2019 -0300

    clutter/main: Remove shader stack
    
    It is private to Clutter, and also unused by Clutter.

 clutter/clutter/clutter-main.c    | 29 -----------------------------
 clutter/clutter/clutter-private.h |  6 ------
 2 files changed, 35 deletions(-)
---
diff --git a/clutter/clutter/clutter-main.c b/clutter/clutter/clutter-main.c
index 6b776601a..ef0b7d289 100644
--- a/clutter/clutter/clutter-main.c
+++ b/clutter/clutter/clutter-main.c
@@ -3577,35 +3577,6 @@ _clutter_context_get_pick_mode (void)
   return context->pick_mode;
 }
 
-void
-_clutter_context_push_shader_stack (ClutterActor *actor)
-{
-  ClutterMainContext *context = _clutter_context_get_default ();
-
-  context->shaders = g_slist_prepend (context->shaders, actor);
-}
-
-ClutterActor *
-_clutter_context_peek_shader_stack (void)
-{
-  ClutterMainContext *context = _clutter_context_get_default ();
-
-  if (context->shaders != NULL)
-    return context->shaders->data;
-
-  return NULL;
-}
-
-ClutterActor *
-_clutter_context_pop_shader_stack (ClutterActor *actor)
-{
-  ClutterMainContext *context = _clutter_context_get_default ();
-
-  context->shaders = g_slist_remove (context->shaders, actor);
-
-  return _clutter_context_peek_shader_stack ();
-}
-
 gboolean
 _clutter_context_get_motion_events_enabled (void)
 {
diff --git a/clutter/clutter/clutter-private.h b/clutter/clutter/clutter-private.h
index d4706808e..e20923a66 100644
--- a/clutter/clutter/clutter-private.h
+++ b/clutter/clutter/clutter-private.h
@@ -146,9 +146,6 @@ struct _ClutterMainContext
   ClutterActor *pointer_grab_actor;
   ClutterActor *keyboard_grab_actor;
 
-  /* stack of actors with shaders during paint */
-  GSList *shaders;
-
   /* fb bit masks for col<->id mapping in picking */
   gint fb_r_mask;
   gint fb_g_mask;
@@ -198,9 +195,6 @@ void                    _clutter_context_lock                           (void);
 void                    _clutter_context_unlock                         (void);
 gboolean                _clutter_context_is_initialized                 (void);
 ClutterPickMode         _clutter_context_get_pick_mode                  (void);
-void                    _clutter_context_push_shader_stack              (ClutterActor *actor);
-ClutterActor *          _clutter_context_pop_shader_stack               (ClutterActor *actor);
-ClutterActor *          _clutter_context_peek_shader_stack              (void);
 gboolean                _clutter_context_get_motion_events_enabled      (void);
 gboolean                _clutter_context_get_show_fps                   (void);