arch(draw): add parallel rendering architecture

BREAKING CHANGE

This is a huge update which introduces parallel rendering. lv_conf.h needs to be updated too.

src/lv_init.h

@@ -0,0 +1,62 @@
+/**
+ * @file lv_init.h
+ *
+ */
+
+#ifndef LV_INIT_H
+#define LV_INIT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include <stdbool.h>
+#include "lv_conf_internal.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**
+ * Initialize LVGL library.
+ * Should be called before any other LVGL related function.
+ */
+void lv_init(void);
+
+
+#if LV_ENABLE_GC || LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
+
+/**
+ * Deinit the 'lv' library
+ * Currently only implemented when not using custom allocators, or GC is enabled.
+ */
+void lv_deinit(void);
+
+#endif
+
+/**
+ * Returns whether the 'lv' library is currently initialized
+ */
+bool lv_is_initialized(void);
+
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_INIT_H*/