[mutter/gbsneto/graphene-frustrum: 3/4] clutter/stage: Simplify frustum setup function

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

commit d39167b2275ca79165ab770d9d9ca7fffb0f7c28
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Oct 10 19:14:52 2020 -0300

    clutter/stage: Simplify frustum setup function
    
    We guarantee to never pass NULL clips anymore, so there's no need
    to check for such case.
    
    Remove the check for NULL clip, and remove all related variables.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1489

 clutter/clutter/clutter-stage.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/clutter/clutter/clutter-stage.c b/clutter/clutter/clutter-stage.c
index a46ef5b3ff..5032ec0f0e 100644
--- a/clutter/clutter/clutter-stage.c
+++ b/clutter/clutter/clutter-stage.c
@@ -768,12 +768,10 @@ _cogl_util_get_eye_planes_for_screen_poly (float                    *polygon,
  */
 static void
 setup_view_for_paint (ClutterStage                *stage,
-                      ClutterStageView            *view,
                       const cairo_rectangle_int_t *clip,
                       graphene_frustum_t          *out_frustum)
 {
   ClutterStagePrivate *priv = stage->priv;
-  cairo_rectangle_int_t view_layout;
   float clip_poly[8];
   float viewport[4];
   cairo_rectangle_int_t geom;
@@ -785,12 +783,6 @@ setup_view_for_paint (ClutterStage                *stage,
   viewport[2] = priv->viewport[2];
   viewport[3] = priv->viewport[3];
 
-  if (!clip)
-    {
-      clutter_stage_view_get_layout (view, &view_layout);
-      clip = &view_layout;
-    }
-
   clip_poly[0] = MAX (clip->x, 0);
   clip_poly[1] = MAX (clip->y, 0);
 
@@ -847,7 +839,7 @@ clutter_stage_do_paint_view (ClutterStage         *stage,
       for (i = 0; i < n_rectangles; i++)
         {
           cairo_region_get_rectangle (redraw_clip, i, &clip_rect);
-          setup_view_for_paint (stage, view, &clip_rect, &clip_frustum);
+          setup_view_for_paint (stage, &clip_rect, &clip_frustum);
           g_array_append_val (clip_frusta, clip_frustum);
         }
     }
@@ -858,7 +850,7 @@ clutter_stage_do_paint_view (ClutterStage         *stage,
       else
         clutter_stage_view_get_layout (view, &clip_rect);
 
-      setup_view_for_paint (stage, view, &clip_rect, &clip_frustum);
+      setup_view_for_paint (stage, &clip_rect, &clip_frustum);
       g_array_append_val (clip_frusta, clip_frustum);
     }