fix(vg_lite): add config to disable draw shadow (#5534)

Signed-off-by: pengyiqiang <pengyiqiang@xiaomi.com>
Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>

Kconfig

@@ -374,6 +374,14 @@ menu "LVGL configuration"
 				help
 					GPU will try to batch these many draw tasks.
 
+			config LV_VG_LITE_USE_BOX_SHADOW
+				bool "Enable border to simulate shadow."
+				default n
+				depends on LV_USE_DRAW_VG_LITE
+				help
+					which usually improves performance,
+					but does not guarantee the same rendering quality as the software.
+
 			config LV_USE_GPU_SDL
 				bool "Use SDL renderer API"
 				default n

lv_conf_template.h

@@ -179,6 +179,11 @@
 /* VG-Lite flush commit trigger threshold. GPU will try to batch these many draw tasks. */
 #define LV_VG_LITE_FLUSH_MAX_COUNT 8
 
+/* Enable border to simulate shadow
+ * NOTE: which usually improves performance,
+ * but does not guarantee the same rendering quality as the software. */
+#define LV_VG_LITE_USE_BOX_SHADOW 0
+
 #endif
 
 /*=======================

src/draw/vg_lite/lv_draw_vg_lite.c

@@ -205,7 +205,9 @@ static int32_t draw_evaluate(lv_draw_unit_t * draw_unit, lv_draw_task_t * task)
         case LV_DRAW_TASK_TYPE_LABEL:
         case LV_DRAW_TASK_TYPE_FILL:
         case LV_DRAW_TASK_TYPE_BORDER:
+#if LV_VG_LITE_USE_BOX_SHADOW
         case LV_DRAW_TASK_TYPE_BOX_SHADOW:
+#endif
         case LV_DRAW_TASK_TYPE_LAYER:
         case LV_DRAW_TASK_TYPE_LINE:
         case LV_DRAW_TASK_TYPE_ARC:

src/lv_conf_internal.h

@@ -471,6 +471,17 @@
     #endif
 #endif
 
+/* Enable border to simulate shadow
+ * NOTE: which usually improves performance,
+ * but does not guarantee the same rendering quality as the software. */
+#ifndef LV_VG_LITE_USE_BOX_SHADOW
+    #ifdef CONFIG_LV_VG_LITE_USE_BOX_SHADOW
+        #define LV_VG_LITE_USE_BOX_SHADOW CONFIG_LV_VG_LITE_USE_BOX_SHADOW
+    #else
+        #define LV_VG_LITE_USE_BOX_SHADOW 0
+    #endif
+#endif
+
 #endif
 
 /*=======================