feat(rlottie) add LVGL-Rlottie interface as 3rd party lib (#2700)

examples/libs/lv_example_libs.h

@@ -19,6 +19,7 @@ extern "C" {
 #include "sjpg/lv_example_sjpg.h"
 #include "qrcode/lv_example_qrcode.h"
 #include "freetype/lv_example_freetype.h"
+#include "rlottie/lv_example_rlottie.h"
 
 /*********************
  *      DEFINES

examples/libs/rlottie/index.rst

@@ -0,0 +1,12 @@
+Load a Lottie animation from raw data
+"""""""""""""""""""""""""""""""""""""
+
+.. lv_example:: libs/rlottie/lv_example_rlottie_1
+  :language: c
+
+Load a Lottie animation from a file
+"""""""""""""""""""""""""""""""""""
+
+.. lv_example:: libs/rlottie/lv_example_rlottie_2
+  :language: c
+

examples/libs/rlottie/lv_example_rlottie.h

@@ -0,0 +1,39 @@
+/**
+ * @file lv_example_rlottie.h
+ *
+ */
+
+#ifndef LV_EXAMPLE_RLOTTIE_H
+#define LV_EXAMPLE_RLOTTIE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_example_rlottie_1(void);
+void lv_example_rlottie_2(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_EXAMPLE_SJPG_H*/

examples/libs/rlottie/lv_example_rlottie_1.c

@@ -0,0 +1,14 @@
+#include "../../lv_examples.h"
+#if LV_USE_RLOTTIE && LV_BUILD_EXAMPLES
+
+/**
+ * Load an lottie animation from flash
+ */
+void lv_example_rlottie_1(void)
+{
+    extern const uint8_t lv_example_rlottie_approve[];
+    lv_obj_t * lottie = lv_rlottie_create_from_raw(lv_scr_act(), 100, 100, (const void *)lv_example_rlottie_approve);
+    lv_obj_center(lottie);
+}
+
+#endif

examples/libs/rlottie/lv_example_rlottie_2.c

@@ -0,0 +1,15 @@
+#include "../../lv_examples.h"
+#if LV_USE_RLOTTIE && LV_BUILD_EXAMPLES
+
+/**
+ * Load an lottie animation from file
+ */
+void lv_example_rlottie_2(void)
+{
+    /*The rlottie library uses STDIO file API, so there is no drievr letter for LVGL*/
+    lv_obj_t * lottie = lv_rlottie_create_from_file(lv_scr_act(), 100, 100,
+            "lvgl/examples/libs/rlottie/lv_example_rlottie_approve.json");
+    lv_obj_center(lottie);
+}
+
+#endif