cogl: Use COGL_ENABLE_DEBUG instead of COGL_DEBUG_ENABLED

COGL_DEBUG_ENABLED is a macro to check if a debug flag is set.
COGL_ENABLE_DEBUG is set by the build system if it's a debug build. The
check `#ifdef COGL_DEBUG_ENABLED` always evaluates to true. Use the
appropriate macro to guard some debugging code.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3446>

cogl/cogl/cogl-matrix-stack-private.h

@@ -56,10 +56,9 @@ struct _CoglMatrixEntry
   CoglMatrixOp op;
   unsigned int ref_count;
 
-#ifdef COGL_DEBUG_ENABLED
-  /* used for performance tracing */
+  /* Debugging, only used when defined(COGL_ENABLE_DEBUG)
+   * Used for performance tracing */
   int composite_gets;
-#endif
 };
 
 typedef struct _CoglMatrixEntryTranslate

cogl/cogl/cogl-matrix-stack.c

@@ -56,7 +56,7 @@ _cogl_matrix_entry_new (CoglMatrixOp operation)
   entry->ref_count = 1;
   entry->op = operation;
 
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
   entry->composite_gets = 0;
 #endif
 
@@ -154,7 +154,7 @@ _cogl_matrix_entry_identity_init (CoglMatrixEntry *entry)
   entry->ref_count = 1;
   entry->op = COGL_MATRIX_OP_LOAD_IDENTITY;
   entry->parent = NULL;
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
   entry->composite_gets = 0;
 #endif
 }

cogl/cogl/cogl-pipeline-debug.c

@@ -163,7 +163,7 @@ dump_pipeline_cb (CoglNode *node, void *user_data)
                           pipeline_id,
                           pipeline,
                           G_OBJECT (pipeline)->ref_count,
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
                           pipeline->has_static_breadcrumb ?
                           pipeline->static_breadcrumb : "NULL"
 #else

cogl/cogl/cogl-pipeline-private.h

@@ -308,13 +308,6 @@ struct _CoglPipeline
    * be allocated dynamically when required... */
   CoglPipelineBigState *big_state;
 
-#ifdef COGL_DEBUG_ENABLED
-  /* For debugging purposes it's possible to associate a static const
-   * string with a pipeline which can be an aid when trying to trace
-   * where the pipeline originates from */
-  const char      *static_breadcrumb;
-#endif
-
   /* Cached state... */
 
   /* A cached, complete list of the layers this pipeline depends
@@ -360,12 +353,17 @@ struct _CoglPipeline
 
   unsigned int          layers_cache_dirty:1;
 
-#ifdef COGL_DEBUG_ENABLED
+  /* Debugging, only used when defined(COGL_ENABLE_DEBUG) */
+
   /* For debugging purposes it's possible to associate a static const
    * string with a pipeline which can be an aid when trying to trace
    * where the pipeline originates from */
   unsigned int          has_static_breadcrumb:1;
-#endif
+
+  /* For debugging purposes it's possible to associate a static const
+   * string with a pipeline which can be an aid when trying to trace
+   * where the pipeline originates from */
+  const char      *static_breadcrumb;
 };
 
 struct _CoglPipelineClass
@@ -728,7 +726,7 @@ void
 _cogl_pipeline_apply_overrides (CoglPipeline *pipeline,
                                 CoglPipelineFlushOptions *options);
 
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
 void
 _cogl_pipeline_set_static_breadcrumb (CoglPipeline *pipeline,
                                       const char *breadcrumb);

cogl/cogl/cogl-pipeline.c

@@ -373,7 +373,7 @@ cogl_pipeline_new (CoglContext *context)
 {
   CoglPipeline *new = cogl_pipeline_copy (context->default_pipeline);
 
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
   _cogl_pipeline_set_static_breadcrumb (new, "new");
 #endif
   return new;
@@ -1159,7 +1159,7 @@ _cogl_pipeline_pre_change_notify (CoglPipeline     *pipeline,
 
       new_authority =
         cogl_pipeline_copy (_cogl_pipeline_get_parent (pipeline));
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
       _cogl_pipeline_set_static_breadcrumb (new_authority,
                                             "pre_change_notify:copy-on-write");
 #endif
@@ -2302,7 +2302,7 @@ _cogl_pipeline_journal_unref (CoglPipeline *pipeline)
   g_object_unref (pipeline);
 }
 
-#ifdef COGL_DEBUG_ENABLED
+#ifdef COGL_ENABLE_DEBUG
 void
 _cogl_pipeline_set_static_breadcrumb (CoglPipeline *pipeline,
                                       const char *breadcrumb)