Use new clutter_actor_get_resource_scale() API

Update the existing users of clutter_actor_get_resource_scale() to the
new API which doesn't return a boolean value.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1287

src/shell-screenshot.c

@@ -393,8 +393,7 @@ grab_window_screenshot (ClutterActor *stage,
       if (meta_window_get_client_type (window) == META_WINDOW_CLIENT_TYPE_WAYLAND)
         {
           float resource_scale;
-          if (!clutter_actor_get_resource_scale (window_actor, &resource_scale))
+          resource_scale = clutter_actor_get_resource_scale (window_actor);
-            resource_scale = 1.0f;
 
           cairo_surface_set_device_scale (priv->image, resource_scale, resource_scale);
         }

src/st/st-drawing-area.c

@@ -85,12 +85,7 @@ st_drawing_area_allocate (ClutterActor          *self,
   int width, height;
   float resource_scale;
 
-  if (!st_widget_get_resource_scale (ST_WIDGET (self), &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (self);
-    {
-      ClutterActorBox empty = CLUTTER_ACTOR_BOX_INIT_ZERO;
-      clutter_actor_set_allocation (self, &empty);
-      return;
-    }
 
   clutter_actor_set_allocation (self, box);
   st_theme_node_get_content_box (theme_node, box, &content_box);
@@ -116,7 +111,7 @@ st_drawing_area_resource_scale_changed (StWidget *self)
   float resource_scale;
   ClutterContent *content = clutter_actor_get_content (CLUTTER_ACTOR (self));
 
-  if (st_widget_get_resource_scale (ST_WIDGET (self), &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (CLUTTER_ACTOR (self));
   clutter_canvas_set_scale_factor (CLUTTER_CANVAS (content), resource_scale);
 }
 
@@ -215,15 +210,10 @@ st_drawing_area_get_surface_size (StDrawingArea *area,
   content = clutter_actor_get_content (CLUTTER_ACTOR (area));
   clutter_content_get_preferred_size (content, &w, &h);
 
-  if (st_widget_get_resource_scale (ST_WIDGET (area), &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (CLUTTER_ACTOR (area));
-    {
+
   w /= resource_scale;
   h /= resource_scale;
-    }
-  else
-    {
-      w = h = 0.0f;
-    }
 
   if (width)
     *width = ceilf (w);

src/st/st-icon.c

@@ -425,8 +425,7 @@ st_icon_update (StIcon *icon)
       return;
     }
 
-  if (!st_widget_get_resource_scale (ST_WIDGET (icon), &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (CLUTTER_ACTOR (icon));
-    return;
 
   theme_node = st_widget_peek_theme_node (ST_WIDGET (icon));
   if (theme_node == NULL)

src/st/st-label.c

@@ -200,17 +200,16 @@ st_label_paint (ClutterActor        *actor,
   st_widget_paint_background (ST_WIDGET (actor), paint_context);
 
   if (shadow_spec)
-    {
-      float resource_scale;
-
-      if (clutter_actor_get_resource_scale (priv->label, &resource_scale))
     {
       ClutterActorBox allocation;
       float width, height;
+      float resource_scale;
 
       clutter_actor_get_allocation_box (priv->label, &allocation);
       clutter_actor_box_get_size (&allocation, &width, &height);
 
+      resource_scale = clutter_actor_get_resource_scale (priv->label);
+
       width *= resource_scale;
       height *= resource_scale;
 
@@ -240,7 +239,6 @@ st_label_paint (ClutterActor        *actor,
                                          clutter_actor_get_paint_opacity (priv->label));
         }
     }
-    }
 
   clutter_actor_paint (priv->label, paint_context);
 }

src/st/st-private.c

@@ -461,8 +461,7 @@ _st_create_shadow_pipeline_from_actor (StShadow     *shadow_spec,
   if (width == 0 || height == 0)
     return NULL;
 
-  if (!clutter_actor_get_resource_scale (actor, &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (actor);
-    return NULL;
 
   width = ceilf (width * resource_scale);
   height = ceilf (height * resource_scale);

src/st/st-widget.c

@@ -412,8 +412,7 @@ st_widget_paint_background (StWidget            *widget,
   float resource_scale;
   guint8 opacity;
 
-  if (!st_widget_get_resource_scale (widget, &resource_scale))
+  resource_scale = clutter_actor_get_resource_scale (CLUTTER_ACTOR (widget));
-    return;
 
   framebuffer = clutter_paint_context_get_framebuffer (paint_context);
   theme_node = st_widget_get_theme_node (widget);
@@ -1413,8 +1412,10 @@ gboolean
 st_widget_get_resource_scale (StWidget *widget,
                               float    *resource_scale)
 {
-  return clutter_actor_get_resource_scale (CLUTTER_ACTOR (widget),
+  if (resource_scale)
-                                           resource_scale);
+    *resource_scale = clutter_actor_get_resource_scale (CLUTTER_ACTOR (widget));
+
+  return TRUE;
 }
 
 static void