lv_conf.h: add LV_FONT_CUSTOM_DECLARE to enable global defination of custom fonts

lv_conf_templ.h

@@ -104,8 +104,6 @@
 /* More info about fonts: https://littlevgl.com/basics#fonts
  * To enable a built-in font use 1,2,4 or 8 values
  * which will determine the bit-per-pixel */
-#define LV_FONT_DEFAULT        &lv_font_dejavu_20     /*Always set a default font from the built-in fonts*/
-
 #define USE_LV_FONT_DEJAVU_10              0
 #define USE_LV_FONT_DEJAVU_10_LATIN_SUP    0
 #define USE_LV_FONT_DEJAVU_10_CYRILLIC     0
@@ -126,6 +124,16 @@
 #define USE_LV_FONT_DEJAVU_40_CYRILLIC     0
 #define USE_LV_FONT_SYMBOL_40              0
 
+/* Optionally declare your custom fonts here.
+ * You can use these fonts as defult font too
+ * and they will be avialale globally. E.g.
+ * #define LV_FONT_CUSTOM_DECLARE LV_FONT_DECLARE(my_font_1) \
+ *						          LV_FONT_DECLARE(my_font_2) \
+ */
+#define LV_FONT_CUSTOM_DECLARE
+
+#define LV_FONT_DEFAULT        &lv_font_dejavu_20     /*Always set a default font from the built-in fonts*/
+
 /*===================
  *  LV_OBJ SETTINGS
  *==================*/

lv_misc/lv_font.h

@@ -141,9 +141,9 @@ int16_t lv_font_get_width_sparse(const lv_font_t * font, uint32_t unicode_letter
  **********************/
 #define LV_FONT_DECLARE(font_name) extern lv_font_t font_name;
 
-/******************************
- *  FONT DECLARATION INCLUDES
- *****************************/
+/**********************
+ *  FONT DECLARATION
+ **********************/
 
 /*10 px */
 #if USE_LV_FONT_DEJAVU_10
@@ -213,6 +213,9 @@ LV_FONT_DECLARE(lv_font_dejavu_40_cyrillic);
 LV_FONT_DECLARE(lv_font_symbol_40);
 #endif
 
+/*Declare the custom (user defined) fonts*/
+LV_FONT_CUSTOM_DECLARE
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif