clutter: Stop using get_default_backend helper

As it ends up using the global default context. So just call that
directly to easily spot the remaining usages of get_default_context.

Note that the helper will probably be removed later this cycle once the
remaining usages in meta & libst have been replaced with passing around
the context

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4077>

clutter/clutter/clutter-blur-effect.c

@@ -167,10 +167,11 @@ clutter_blur_effect_init (ClutterBlurEffect *self)
   if (G_UNLIKELY (klass->base_pipeline == NULL))
     {
       CoglSnippet *snippet;
-      CoglContext *ctx =
+      ClutterContext *context = _clutter_context_get_default ();
-        clutter_backend_get_cogl_context (clutter_get_default_backend ());
+      ClutterBackend *backend = clutter_context_get_backend (context);
+      CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
 
-      klass->base_pipeline = cogl_pipeline_new (ctx);
+      klass->base_pipeline = cogl_pipeline_new (cogl_context);
       cogl_pipeline_set_static_name (klass->base_pipeline,
                                      "ClutterBlurEffect (base pipeline)");
 

clutter/clutter/clutter-brightness-contrast-effect.c

@@ -370,10 +370,11 @@ clutter_brightness_contrast_effect_init (ClutterBrightnessContrastEffect *self)
   if (G_UNLIKELY (klass->base_pipeline == NULL))
     {
       CoglSnippet *snippet;
-      CoglContext *ctx =
+      ClutterContext *context = _clutter_context_get_default ();
-        clutter_backend_get_cogl_context (clutter_get_default_backend ());
+      ClutterBackend *backend = clutter_context_get_backend (context);
+      CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
 
-      klass->base_pipeline = cogl_pipeline_new (ctx);
+      klass->base_pipeline = cogl_pipeline_new (cogl_context);
       cogl_pipeline_set_static_name (klass->base_pipeline,
                                      "ClutterBrightnessContrast");
 

clutter/clutter/clutter-colorize-effect.c

@@ -210,10 +210,11 @@ clutter_colorize_effect_init (ClutterColorizeEffect *self)
   if (G_UNLIKELY (klass->base_pipeline == NULL))
     {
       CoglSnippet *snippet;
-      CoglContext *ctx =
+      ClutterContext *context = _clutter_context_get_default ();
-        clutter_backend_get_cogl_context (clutter_get_default_backend ());
+      ClutterBackend *backend = clutter_context_get_backend (context);
+      CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
 
-      klass->base_pipeline = cogl_pipeline_new (ctx);
+      klass->base_pipeline = cogl_pipeline_new (cogl_context);
       cogl_pipeline_set_static_name (klass->base_pipeline, "ClutterColorize");
 
       snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,

clutter/clutter/clutter-deform-effect.c

@@ -373,8 +373,9 @@ clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
   gint x, y, direction, n_indices;
   CoglAttribute *attributes[3];
   guint16 *static_indices;
-  CoglContext *ctx =
+  ClutterContext *context = _clutter_context_get_default ();
-    clutter_backend_get_cogl_context (clutter_get_default_backend ());
+  ClutterBackend *backend = clutter_context_get_backend (context);
+  CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
   CoglIndices *indices;
   guint16 *idx;
   int i;
@@ -438,7 +439,7 @@ clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
 
 #undef MESH_INDEX
 
-  indices = cogl_indices_new (ctx,
+  indices = cogl_indices_new (cogl_context,
                               COGL_INDICES_TYPE_UNSIGNED_SHORT,
                               static_indices,
                               n_indices);
@@ -448,7 +449,7 @@ clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
   priv->n_vertices = (priv->x_tiles + 1) * (priv->y_tiles + 1);
 
   priv->buffer =
-    cogl_attribute_buffer_new (ctx,
+    cogl_attribute_buffer_new (cogl_context,
                                sizeof (ClutterVertexP3T2C4) *
                                priv->n_vertices,
                                NULL);

clutter/clutter/clutter-desaturate-effect.c

@@ -213,11 +213,12 @@ clutter_desaturate_effect_init (ClutterDesaturateEffect *self)
 
   if (G_UNLIKELY (klass->base_pipeline == NULL))
     {
-      CoglContext *ctx =
+      ClutterContext *context = _clutter_context_get_default ();
-        clutter_backend_get_cogl_context (clutter_get_default_backend ());
+      ClutterBackend *backend = clutter_context_get_backend (context);
+      CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
       CoglSnippet *snippet;
 
-      klass->base_pipeline = cogl_pipeline_new (ctx);
+      klass->base_pipeline = cogl_pipeline_new (cogl_context);
       cogl_pipeline_set_static_name (klass->base_pipeline, "ClutterDesaturate");
 
       snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,

clutter/clutter/clutter-image.c

@@ -64,11 +64,12 @@ create_texture_from_data (unsigned int      width,
                           const uint8_t    *data,
                           GError          **error)
 {
-  CoglContext *ctx =
+  ClutterContext *context = _clutter_context_get_default ();
-    clutter_backend_get_cogl_context (clutter_get_default_backend ());
+  ClutterBackend *backend = clutter_context_get_backend (context);
+  CoglContext *cogl_context = clutter_backend_get_cogl_context (backend);
   CoglTexture *texture_2d;
 
-  texture_2d = cogl_texture_2d_new_from_data (ctx,
+  texture_2d = cogl_texture_2d_new_from_data (cogl_context,
                                               width,
                                               height,
                                               pixel_format,

clutter/clutter/clutter-input-method.c

@@ -243,10 +243,10 @@ clutter_input_method_put_im_event (ClutterInputMethod      *im,
                                    uint32_t                 len,
                                    ClutterPreeditResetMode  mode)
 {
-  ClutterSeat *seat;
   ClutterEvent *event;
-
+  ClutterContext *context = _clutter_context_get_default ();
-  seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
+  ClutterBackend *backend = clutter_context_get_backend (context);
+  ClutterSeat *seat = clutter_backend_get_default_seat (backend);
 
   event = clutter_event_im_new (event_type,
                                 CLUTTER_EVENT_FLAG_INPUT_METHOD,
@@ -476,6 +476,8 @@ clutter_input_method_forward_key (ClutterInputMethod *im,
   ClutterInputDevice *keyboard;
   ClutterSeat *seat;
   ClutterEvent *event;
+  ClutterContext *context;
+  ClutterBackend *backend;
 
   g_return_if_fail (CLUTTER_IS_INPUT_METHOD (im));
 
@@ -483,7 +485,9 @@ clutter_input_method_forward_key (ClutterInputMethod *im,
   if (!priv->focus)
     return;
 
-  seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
+  context = _clutter_context_get_default ();
+  backend = clutter_context_get_backend (context);
+  seat = clutter_backend_get_default_seat (backend);
   keyboard = clutter_seat_get_keyboard (seat);
 
   event = clutter_event_key_new (press ? CLUTTER_KEY_PRESS : CLUTTER_KEY_RELEASE,

clutter/clutter/clutter-paint-nodes.c

@@ -1589,15 +1589,19 @@ clutter_blur_node_new (unsigned int width,
   g_autoptr (GError) error = NULL;
   ClutterLayerNode *layer_node;
   ClutterBlurNode *blur_node;
-  CoglContext *context;
+  ClutterContext *context;
+  ClutterBackend *backend;
+  CoglContext *cogl_context;
   CoglTexture *texture;
   ClutterBlur *blur;
 
   g_return_val_if_fail (radius >= 0.0, NULL);
 
+  context = _clutter_context_get_default ();
+  backend = clutter_context_get_backend (context);
+  cogl_context = clutter_backend_get_cogl_context (backend);
   blur_node = _clutter_paint_node_create (CLUTTER_TYPE_BLUR_NODE);
-  context = clutter_backend_get_cogl_context (clutter_get_default_backend ());
+  texture = cogl_texture_2d_new_with_size (cogl_context, width, height);
-  texture = cogl_texture_2d_new_with_size (context, width, height);
 
   cogl_texture_set_premultiplied (texture, TRUE);