feat(lottie): add ThorVG based lottie widget

examples/widgets/lottie/index.rst

@@ -0,0 +1,11 @@
+Load a Lottie animation from an array
+-------------------------------------
+
+.. lv_example:: libs/lottie/lv_example_lottie_1
+  :language: c
+
+Load a Lottie animation from file
+---------------------------------
+
+.. lv_example:: libs/lottie/lv_example_lottie_2
+  :language: c

examples/widgets/lottie/lv_example_lottie_1.c

@@ -0,0 +1,43 @@
+#include "../../lv_examples.h"
+#if LV_BUILD_EXAMPLES
+#if LV_USE_LOTTIE
+
+/**
+ * Load an lottie animation from data
+ */
+void lv_example_lottie_1(void)
+{
+    extern const uint8_t lv_example_lottie_approve[];
+    extern const size_t lv_example_lottie_approve_size;
+
+    lv_obj_t * lottie = lv_lottie_create(lv_screen_active());
+    lv_lottie_set_src_data(lottie, lv_example_lottie_approve, lv_example_lottie_approve_size);
+
+#if LV_DRAW_BUF_ALIGN == 4 && LV_DRAW_BUF_STRIDE_ALIGN == 1
+    /*If there are no special requirements, just declare a buffer
+      x4 because the Lottie is rendered in ARGB8888 format*/
+    static uint8_t buf[64 * 64 * 4];
+    lv_lottie_set_buffer(lottie, 64, 64, buf);
+#else
+    /*For GPUs and special alignemnt/strid setting use a draw_buf instead*/
+    LV_DRAW_BUF_DEFINE(draw_buf, 64, 64, LV_COLOR_FORMAT_ARGB8888);
+    lv_lottie_set_draw_buf(lottie, &draw_buf);
+#endif
+
+    lv_obj_center(lottie);
+}
+
+#else
+
+void lv_example_lottie_1(void)
+{
+    /*fallback for online examples*/
+
+    lv_obj_t * label = lv_label_create(lv_screen_active());
+    lv_label_set_text(label, "Lottie cannot be previewed online");
+    lv_obj_center(label);
+}
+
+#endif /*LV_USE_LOTTIE*/
+
+#endif /*LV_BUILD_EXAMPLES*/

examples/widgets/lottie/lv_example_lottie_2.c

@@ -0,0 +1,41 @@
+#include "../../lv_examples.h"
+#if LV_BUILD_EXAMPLES
+#if LV_USE_LOTTIE
+
+/**
+ * Load an lottie animation from file
+ */
+void lv_example_lottie_2(void)
+{
+
+    lv_obj_t * lottie = lv_lottie_create(lv_screen_active());
+    lv_lottie_set_src_file(lottie, "lvgl/examples/widgets/lottie/lv_example_lottie_approve.json");
+
+#if LV_DRAW_BUF_ALIGN == 4 && LV_DRAW_BUF_STRIDE_ALIGN == 1
+    /*If there are no special requirements, just declare a buffer
+      x4 because the Lottie is rendered in ARGB8888 format*/
+    static uint8_t buf[64 * 64 * 4];
+    lv_lottie_set_buffer(lottie, 64, 64, buf);
+#else
+    /*For GPUs and special alignemnt/strid setting use a draw_buf instead*/
+    LV_DRAW_BUF_DEFINE(draw_buf, 64, 64, LV_COLOR_FORMAT_ARGB8888);
+    lv_lottie_set_draw_buf(lottie, &draw_buf);
+#endif
+
+    lv_obj_center(lottie);
+}
+
+#else
+
+void lv_example_lottie_2(void)
+{
+    /*fallback for online examples*/
+
+    lv_obj_t * label = lv_label_create(lv_screen_active());
+    lv_label_set_text(label, "Lottie cannot be previewed online");
+    lv_obj_center(label);
+}
+
+#endif /*LV_USE_LOTTIE*/
+
+#endif /*LV_BUILD_EXAMPLES*/

examples/widgets/lv_example_widgets.h

@@ -97,6 +97,9 @@ void lv_example_line_1(void);
 void lv_example_list_1(void);
 void lv_example_list_2(void);
 
+void lv_example_lottie_1(void);
+void lv_example_lottie_2(void);
+
 void lv_example_menu_1(void);
 void lv_example_menu_2(void);
 void lv_example_menu_3(void);