acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_draw_arc.c (5977B)
      1 /**
      2  * @file lv_draw_arc.c
      3  *
      4  */
      5 
      6 /*********************
      7  *      INCLUDES
      8  *********************/
      9 #include "lv_draw.h"
     10 #include "lv_draw_arc.h"
     11 
     12 /*********************
     13  *      DEFINES
     14  *********************/
     15 
     16 /**********************
     17  *      TYPEDEFS
     18  **********************/
     19 
     20 /**********************
     21  *  STATIC PROTOTYPES
     22  **********************/
     23 
     24 /**********************
     25  *  STATIC VARIABLES
     26  **********************/
     27 
     28 /**********************
     29  *      MACROS
     30  **********************/
     31 
     32 /**********************
     33  *   GLOBAL FUNCTIONS
     34  **********************/
     35 
     36 void lv_draw_arc_dsc_init(lv_draw_arc_dsc_t * dsc)
     37 {
     38     lv_memset_00(dsc, sizeof(lv_draw_arc_dsc_t));
     39     dsc->width = 1;
     40     dsc->opa = LV_OPA_COVER;
     41     dsc->color = lv_color_black();
     42 }
     43 
     44 void lv_draw_arc(lv_draw_ctx_t * draw_ctx, const lv_draw_arc_dsc_t * dsc, const lv_point_t * center, uint16_t radius,
     45                  uint16_t start_angle, uint16_t end_angle)
     46 {
     47     if(dsc->opa <= LV_OPA_MIN) return;
     48     if(dsc->width == 0) return;
     49     if(start_angle == end_angle) return;
     50 
     51     draw_ctx->draw_arc(draw_ctx, dsc, center, radius, start_angle, end_angle);
     52 
     53     //    const lv_draw_backend_t * backend = lv_draw_backend_get();
     54     //    backend->draw_arc(center_x, center_y, radius, start_angle, end_angle, clip_area, dsc);
     55 }
     56 
     57 void lv_draw_arc_get_area(lv_coord_t x, lv_coord_t y, uint16_t radius,  uint16_t start_angle, uint16_t end_angle,
     58                           lv_coord_t w, bool rounded, lv_area_t * area)
     59 {
     60     lv_coord_t rout = radius;
     61 
     62     /*Special case: full arc invalidation */
     63     if(end_angle == start_angle + 360) {
     64         area->x1 = x - rout;
     65         area->y1 = y - rout;
     66         area->x2 = x + rout;
     67         area->y2 = y + rout;
     68         return;
     69     }
     70 
     71     if(start_angle > 360) start_angle -= 360;
     72     if(end_angle > 360) end_angle -= 360;
     73 
     74     lv_coord_t rin = radius - w;
     75     lv_coord_t extra_area = rounded ? w / 2 + 1 : 0;
     76     uint8_t start_quarter = start_angle / 90;
     77     uint8_t end_quarter = end_angle / 90;
     78 
     79     /*360 deg still counts as quarter 3 (360 / 90 would be 4)*/
     80     if(start_quarter == 4) start_quarter = 3;
     81     if(end_quarter == 4) end_quarter = 3;
     82 
     83     if(start_quarter == end_quarter && start_angle <= end_angle) {
     84         if(start_quarter == 0) {
     85             area->y1 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
     86             area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
     87 
     88             area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
     89             area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
     90         }
     91         else if(start_quarter == 1) {
     92             area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
     93             area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
     94 
     95             area->y1 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
     96             area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
     97         }
     98         else if(start_quarter == 2) {
     99             area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    100             area->y2 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
    101 
    102             area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    103             area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
    104         }
    105         else if(start_quarter == 3) {
    106             area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
    107             area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    108 
    109             area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
    110             area->y2 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
    111         }
    112     }
    113     else if(start_quarter == 0 && end_quarter == 1) {
    114         area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    115         area->y1 = y + ((LV_MIN(lv_trigo_sin(end_angle),
    116                                 lv_trigo_sin(start_angle))  * rin) >> LV_TRIGO_SHIFT) - extra_area;
    117         area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
    118         area->y2 = y + rout + extra_area;
    119     }
    120     else if(start_quarter == 1 && end_quarter == 2) {
    121         area->x1 = x - rout - extra_area;
    122         area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    123         area->x2 = x + ((LV_MAX(lv_trigo_sin(start_angle + 90),
    124                                 lv_trigo_sin(end_angle + 90)) * rin) >> LV_TRIGO_SHIFT) + extra_area;
    125         area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
    126     }
    127     else if(start_quarter == 2 && end_quarter == 3) {
    128         area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    129         area->y1 = y - rout - extra_area;
    130         area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
    131         area->y2 = y + (LV_MAX(lv_trigo_sin(end_angle) * rin,
    132                                lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
    133     }
    134     else if(start_quarter == 3 && end_quarter == 0) {
    135         area->x1 = x + ((LV_MIN(lv_trigo_sin(end_angle + 90),
    136                                 lv_trigo_sin(start_angle + 90)) * rin) >> LV_TRIGO_SHIFT) - extra_area;
    137         area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
    138         area->x2 = x + rout + extra_area;
    139         area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
    140 
    141     }
    142     else {
    143         area->x1 = x - rout;
    144         area->y1 = y - rout;
    145         area->x2 = x + rout;
    146         area->y2 = y + rout;
    147     }
    148 }
    149 
    150 /**********************
    151  *   STATIC FUNCTIONS
    152  **********************/