Transition to hekate bdk layout

bdk/libs/lvgl/lv_misc/lv_circ.c

@@ -0,0 +1,79 @@
+/**
+ * @file lv_circ.c
+ * Circle drawing algorithm (with Bresenham)
+ * Only a 1/8 circle is calculated. Use CIRC_OCT1_X, CIRC_OCT1_Y macros to get
+ * the other octets.
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_circ.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+/**
+ * Initialize the circle drawing
+ * @param c pointer to a point. The coordinates will be calculated here
+ * @param tmp point to a variable. It will store temporary data
+ * @param radius radius of the circle
+ */
+void lv_circ_init(lv_point_t * c, lv_coord_t * tmp, lv_coord_t radius)
+{
+    c->x = radius;
+    c->y = 0;
+    *tmp = 1 - radius;
+}
+
+/**
+ * Test the circle drawing is ready or not
+ * @param c same as in circ_init
+ * @return true if the circle is not ready yet
+ */
+bool lv_circ_cont(lv_point_t * c)
+{
+    return c->y <= c->x ? true : false;
+}
+
+/**
+ * Get the next point from the circle
+ * @param c same as in circ_init. The next point stored here.
+ * @param tmp same as in circ_init.
+ */
+void lv_circ_next(lv_point_t * c, lv_coord_t * tmp)
+{
+    c->y++;
+
+    if(*tmp <= 0) {
+        (*tmp) += 2 * c->y + 1;   // Change in decision criterion for y -> y+1
+    } else {
+        c->x--;
+        (*tmp) += 2 * (c->y - c->x) + 1;   // Change for y -> y+1, x -> x-1
+    }
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/