2  * @file lv_draw_sw_mask.c
61 static void circ_init(lv_point_t * c, int32_t * tmp, int32_t radius);
62 static bool circ_cont(lv_point_t * c);
63 static void circ_next(lv_point_t * c, int32_t * tmp);
64 static void circ_calc_aa4(lv_draw_sw_mask_radius_circle_dsc_t * c, int32_t radius);
65 static lv_opa_t * get_next_line(lv_draw_sw_mask_radius_circle_dsc_t * c, int32_t y, int32_t * len,
1032  * @param c pointer to a point. The coordinates will be calculated here
1036 static void circ_init(lv_point_t * c, int32_t * tmp, int32_t radius)  in circ_init()  argument
1038     c->x = radius;  in circ_init()
1039     c->y = 0;  in circ_init()
1045  * @param c same as in circ_init
1048 static bool circ_cont(lv_point_t * c)  in circ_cont()  argument
1050     return c->y <= c->x;  in circ_cont()
1055  * @param c same as in circ_init. The next point stored here.
1058 static void circ_next(lv_point_t * c, int32_t * tmp)  in circ_next()  argument
1062         (*tmp) += 2 * c->y + 3; /*Change in decision criterion for y -> y+1*/  in circ_next()
1065         (*tmp) += 2 * (c->y - c->x) + 5; /*Change for y -> y+1, x -> x-1*/  in circ_next()
1066         c->x--;  in circ_next()
1068     c->y++;  in circ_next()
1071 static void circ_calc_aa4(lv_draw_sw_mask_radius_circle_dsc_t * c, int32_t radius)  in circ_calc_aa4()  argument
1074     c->radius = radius;  in circ_calc_aa4()
1077     if(c->buf) lv_free(c->buf);  in circ_calc_aa4()
1079     c->buf = lv_malloc(radius * 6 + 6);  /*Use uint16_t for opa_start_on_y and x_start_on_y*/  in circ_calc_aa4()
1080     LV_ASSERT_MALLOC(c->buf);  in circ_calc_aa4()
1081     c->cir_opa = c->buf;  in circ_calc_aa4()
1082     c->opa_start_on_y = (uint16_t *)(c->buf + 2 * radius + 2);  in circ_calc_aa4()
1083     c->x_start_on_y = (uint16_t *)(c->buf + 4 * radius + 4);  in circ_calc_aa4()
1087         c->cir_opa[0] = 180;  in circ_calc_aa4()
1088         c->opa_start_on_y[0] = 0;  in circ_calc_aa4()
1089         c->opa_start_on_y[1] = 1;  in circ_calc_aa4()
1090         c->x_start_on_y[0] = 0;  in circ_calc_aa4()
1125             c->cir_opa[cir_size] = x_fract[0] + x_fract[1] + x_fract[2] + x_fract[3];  in circ_calc_aa4()
1126             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1133             c->cir_opa[cir_size] = x_fract[0];  in circ_calc_aa4()
1134             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1139             c->cir_opa[cir_size] = 1 * 4 + x_fract[1] + x_fract[2] + x_fract[3];;  in circ_calc_aa4()
1140             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1147             c->cir_opa[cir_size] = x_fract[0] + x_fract[1];  in circ_calc_aa4()
1148             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1153             c->cir_opa[cir_size] = 2 * 4 + x_fract[2] + x_fract[3];;  in circ_calc_aa4()
1154             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1161             c->cir_opa[cir_size] = x_fract[0] + x_fract[1] + x_fract[2];  in circ_calc_aa4()
1162             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1167             c->cir_opa[cir_size] = 3 * 4 + x_fract[3];;  in circ_calc_aa4()
1168             c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1193         c->cir_opa[cir_size] = tmp_val;  in circ_calc_aa4()
1194         c->cir_opa[cir_size] *= 16;  in circ_calc_aa4()
1202         c->cir_opa[cir_size] = c->cir_opa[i];  in circ_calc_aa4()
1207     c->opa_start_on_y[0] = 0;  in circ_calc_aa4()
1209         c->opa_start_on_y[y] = i;  in circ_calc_aa4()
1210         c->x_start_on_y[y] = cir_x[i];  in circ_calc_aa4()
1212             c->x_start_on_y[y] = LV_MIN(c->x_start_on_y[y], cir_x[i]);  in circ_calc_aa4()
1220 static lv_opa_t * get_next_line(lv_draw_sw_mask_radius_circle_dsc_t * c, int32_t y, int32_t * len,  in get_next_line()  argument
1223     *len = c->opa_start_on_y[y + 1] - c->opa_start_on_y[y];  in get_next_line()
1224     *x_start = c->x_start_on_y[y];  in get_next_line()
1225     return &c->cir_opa[c->opa_start_on_y[y]];  in get_next_line()