39     dsc->width = 1;  in lv_draw_arc_dsc_init()
40     dsc->opa = LV_OPA_COVER;  in lv_draw_arc_dsc_init()
41     dsc->color = lv_color_black();  in lv_draw_arc_dsc_init()
47     if(dsc->opa <= LV_OPA_MIN) return;  in lv_draw_arc()
48     if(dsc->width == 0) return;  in lv_draw_arc()
51     draw_ctx->draw_arc(draw_ctx, dsc, center, radius, start_angle, end_angle);  in lv_draw_arc()
54     //    backend->draw_arc(center_x, center_y, radius, start_angle, end_angle, clip_area, dsc);  in lv_draw_arc()
57 void lv_draw_arc_get_area(lv_coord_t x, lv_coord_t y, uint16_t radius,  uint16_t start_angle, uint1…  in lv_draw_arc_get_area()  argument
64         area->x1 = x - rout;  in lv_draw_arc_get_area()
65         area->y1 = y - rout;  in lv_draw_arc_get_area()
66         area->x2 = x + rout;  in lv_draw_arc_get_area()
67         area->y2 = y + rout;  in lv_draw_arc_get_area()
71     if(start_angle > 360) start_angle -= 360;  in lv_draw_arc_get_area()
72     if(end_angle > 360) end_angle -= 360;  in lv_draw_arc_get_area()
74     lv_coord_t rin = radius - w;  in lv_draw_arc_get_area()
85             area->y1 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
86             area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
88             area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
89             area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
92             area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
93             area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
95             area->y1 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
96             area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
99             area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
100             area->y2 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
102             area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
103             area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
106             area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
107             area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
109             area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
110             area->y2 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
114         area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
115         area->y1 = y + ((LV_MIN(lv_trigo_sin(end_angle),  in lv_draw_arc_get_area()
116                                 lv_trigo_sin(start_angle))  * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
117         area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
118         area->y2 = y + rout + extra_area;  in lv_draw_arc_get_area()
121         area->x1 = x - rout - extra_area;  in lv_draw_arc_get_area()
122         area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
123         area->x2 = x + ((LV_MAX(lv_trigo_sin(start_angle + 90),  in lv_draw_arc_get_area()
125         area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
128         area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
129         area->y1 = y - rout - extra_area;  in lv_draw_arc_get_area()
130         area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
131         area->y2 = y + (LV_MAX(lv_trigo_sin(end_angle) * rin,  in lv_draw_arc_get_area()
135         area->x1 = x + ((LV_MIN(lv_trigo_sin(end_angle + 90),  in lv_draw_arc_get_area()
136 …                            lv_trigo_sin(start_angle + 90)) * rin) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
137         area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;  in lv_draw_arc_get_area()
138         area->x2 = x + rout + extra_area;  in lv_draw_arc_get_area()
139         area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;  in lv_draw_arc_get_area()
143         area->x1 = x - rout;  in lv_draw_arc_get_area()
144         area->y1 = y - rout;  in lv_draw_arc_get_area()
145         area->x2 = x + rout;  in lv_draw_arc_get_area()
146         area->y2 = y + rout;  in lv_draw_arc_get_area()