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33e6eb45b3fd315dd1b430e059f2816726082040
MXC_A39_20240320/MXC-A39/lvgl/src/draw/lv_draw_arc.c
liulin 33e6eb45b3 A39模拟器
2024-03-07 11:03:18 +08:00

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/**
* @file lv_draw_arc.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_draw_arc.h"
#include "lv_draw_rect.h"
#include "lv_draw_mask.h"
#include "../misc/lv_math.h"
#include "../misc/lv_log.h"
#include "../misc/lv_mem.h"
/*********************
* DEFINES
*********************/
#define SPLIT_RADIUS_LIMIT 10 /*With radius greater then this the arc will drawn in quarters. A quarter is drawn only if there is arc in it*/
#define SPLIT_ANGLE_GAP_LIMIT 60 /*With small gaps in the arc don't bother with splitting because there is nothing to skip.*/
/**********************
* TYPEDEFS
**********************/
typedef struct {
lv_coord_t center_x;
lv_coord_t center_y;
lv_coord_t radius;
uint16_t start_angle;
uint16_t end_angle;
uint16_t start_quarter;
uint16_t end_quarter;
lv_coord_t width;
lv_draw_rect_dsc_t * draw_dsc;
const lv_area_t * draw_area;
const lv_area_t * clip_area;
} quarter_draw_dsc_t;
/**********************
* STATIC PROTOTYPES
**********************/
#if LV_DRAW_COMPLEX
static void draw_quarter_0(quarter_draw_dsc_t * q);
static void draw_quarter_1(quarter_draw_dsc_t * q);
static void draw_quarter_2(quarter_draw_dsc_t * q);
static void draw_quarter_3(quarter_draw_dsc_t * q);
static void get_rounded_area(int16_t angle, lv_coord_t radius, uint8_t thickness, lv_area_t * res_area);
#endif /*LV_DRAW_COMPLEX*/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
LV_ATTRIBUTE_FAST_MEM void lv_draw_arc_dsc_init(lv_draw_arc_dsc_t * dsc)
{
lv_memset_00(dsc, sizeof(lv_draw_arc_dsc_t));
dsc->width = 1;
dsc->opa = LV_OPA_COVER;
dsc->color = lv_color_black();
}
void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius, uint16_t start_angle, uint16_t end_angle,
const lv_area_t * clip_area, const lv_draw_arc_dsc_t * dsc)
{
#if LV_DRAW_COMPLEX
if(dsc->opa <= LV_OPA_MIN) return;
if(dsc->width == 0) return;
if(start_angle == end_angle) return;
lv_coord_t width = dsc->width;
if(width > radius) width = radius;
lv_draw_rect_dsc_t cir_dsc;
lv_draw_rect_dsc_init(&cir_dsc);
cir_dsc.blend_mode = dsc->blend_mode;
if(dsc->img_src) {
cir_dsc.bg_opa = LV_OPA_TRANSP;
cir_dsc.bg_img_src = dsc->img_src;
cir_dsc.bg_img_opa = dsc->opa;
} else {
cir_dsc.bg_opa = dsc->opa;
cir_dsc.bg_color = dsc->color;
}
lv_area_t area_out;
area_out.x1 = center_x - radius;
area_out.y1 = center_y - radius;
area_out.x2 = center_x + radius - 1; /*-1 because the center already belongs to the left/bottom part*/
area_out.y2 = center_y + radius - 1;
lv_area_t area_in;
lv_area_copy(&area_in, &area_out);
area_in.x1 += dsc->width;
area_in.y1 += dsc->width;
area_in.x2 -= dsc->width;
area_in.y2 -= dsc->width;
/*Draw a full ring*/
if(start_angle + 360 == end_angle || start_angle == end_angle + 360) {
cir_dsc.border_width = dsc->width;
cir_dsc.border_color = dsc->color;
cir_dsc.border_opa = dsc->opa;
cir_dsc.bg_opa = LV_OPA_TRANSP;
cir_dsc.radius = LV_RADIUS_CIRCLE;
lv_draw_rect(&area_out, clip_area, &cir_dsc);
return;
}
while(start_angle >= 360) start_angle -= 360;
while(end_angle >= 360) end_angle -= 360;
lv_draw_mask_angle_param_t mask_angle_param;
lv_draw_mask_angle_init(&mask_angle_param, center_x, center_y, start_angle, end_angle);
int16_t mask_angle_id = lv_draw_mask_add(&mask_angle_param, NULL);
/*Create inner the mask*/
lv_draw_mask_radius_param_t mask_in_param;
lv_draw_mask_radius_init(&mask_in_param, &area_in, LV_RADIUS_CIRCLE, true);
int16_t mask_in_id = lv_draw_mask_add(&mask_in_param, NULL);
lv_draw_mask_radius_param_t mask_out_param;
lv_draw_mask_radius_init(&mask_out_param, &area_out, LV_RADIUS_CIRCLE, false);
int16_t mask_out_id = lv_draw_mask_add(&mask_out_param, NULL);
int32_t angle_gap;
if(end_angle > start_angle) {
angle_gap = 360 - (end_angle - start_angle);
}
else {
angle_gap = start_angle - end_angle;
}
if(angle_gap > SPLIT_ANGLE_GAP_LIMIT && radius > SPLIT_RADIUS_LIMIT) {
/*Handle each quarter individually and skip which is empty*/
quarter_draw_dsc_t q_dsc;
q_dsc.center_x = center_x;
q_dsc.center_y = center_y;
q_dsc.radius = radius;
q_dsc.start_angle = start_angle;
q_dsc.end_angle = end_angle;
q_dsc.start_quarter = (start_angle / 90) & 0x3;
q_dsc.end_quarter = (end_angle / 90) & 0x3;
q_dsc.width = width;
q_dsc.draw_dsc = &cir_dsc;
q_dsc.draw_area = &area_out;
q_dsc.clip_area = clip_area;
draw_quarter_0(&q_dsc);
draw_quarter_1(&q_dsc);
draw_quarter_2(&q_dsc);
draw_quarter_3(&q_dsc);
}
else {
lv_draw_rect(&area_out, clip_area, &cir_dsc);
}
lv_draw_mask_remove_id(mask_angle_id);
lv_draw_mask_remove_id(mask_out_id);
lv_draw_mask_remove_id(mask_in_id);
if(dsc->rounded) {
lv_draw_mask_radius_param_t mask_end_param;
lv_area_t round_area;
get_rounded_area(start_angle, radius, width, &round_area);
round_area.x1 += center_x;
round_area.x2 += center_x;
round_area.y1 += center_y;
round_area.y2 += center_y;
lv_area_t clip_area2;
if(_lv_area_intersect(&clip_area2, clip_area, &round_area)) {
lv_draw_mask_radius_init(&mask_end_param, &round_area, LV_RADIUS_CIRCLE, false);
int16_t mask_end_id = lv_draw_mask_add(&mask_end_param, NULL);
lv_draw_rect(&area_out, &clip_area2, &cir_dsc);
lv_draw_mask_remove_id(mask_end_id);
}
get_rounded_area(end_angle, radius, width, &round_area);
round_area.x1 += center_x;
round_area.x2 += center_x;
round_area.y1 += center_y;
round_area.y2 += center_y;
if(_lv_area_intersect(&clip_area2, clip_area, &round_area)) {
lv_draw_mask_radius_init(&mask_end_param, &round_area, LV_RADIUS_CIRCLE, false);
int16_t mask_end_id = lv_draw_mask_add(&mask_end_param, NULL);
lv_draw_rect(&area_out, &clip_area2, &cir_dsc);
lv_draw_mask_remove_id(mask_end_id);
}
}
#else
LV_LOG_WARN("Can't draw arc with LV_DRAW_COMPLEX == 0");
LV_UNUSED(center_x);
LV_UNUSED(center_y);
LV_UNUSED(radius);
LV_UNUSED(start_angle);
LV_UNUSED(end_angle);
LV_UNUSED(clip_area);
LV_UNUSED(dsc);
#endif /*LV_DRAW_COMPLEX*/
}
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, lv_coord_t w, bool rounded, lv_area_t * area)
{
lv_coord_t rout = radius;
lv_coord_t rin = radius - w;
lv_coord_t extra_area = rounded ? w : 0;
uint8_t start_quarter = start_angle / 90;
uint8_t end_quarter = end_angle / 90;
if(start_quarter == end_quarter && start_angle <= end_angle) {
if(start_quarter == 0) {
area->y1 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
}
else if(start_quarter == 1) {
area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
area->y1 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
}
else if(start_quarter == 2) {
area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->y2 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
}
else if(start_quarter == 3) {
area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->y2 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
}
}
else if(start_quarter == 0 && end_quarter == 1) {
area->x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->y1 = y + ((LV_MIN(lv_trigo_sin(end_angle),
lv_trigo_sin(start_angle)) * rin) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->y2 = y + rout + extra_area;
}
else if(start_quarter == 1 && end_quarter == 2) {
area->x1 = x - rout - extra_area;
area->y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + ((LV_MAX(lv_trigo_sin(start_angle + 90),
lv_trigo_sin(end_angle + 90)) * rin) >> LV_TRIGO_SHIFT) + extra_area;
area->y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
}
else if(start_quarter == 2 && end_quarter == 3) {
area->x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->y1 = y - rout - extra_area;
area->x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
area->y2 = y + (LV_MAX(lv_trigo_sin(end_angle) * rin,
lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
}
else if(start_quarter == 3 && end_quarter == 0) {
area->x1 = x + ((LV_MIN(lv_trigo_sin(end_angle + 90),
lv_trigo_sin(start_angle + 90)) * rin) >> LV_TRIGO_SHIFT) - extra_area;
area->y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
area->x2 = x + rout + extra_area;
area->y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
}
else {
area->x1 = x - rout;
area->y1 = y - rout;
area->x2 = x + rout;
area->y2 = y + rout;
}
}
/**********************
* STATIC FUNCTIONS
**********************/
#if LV_DRAW_COMPLEX
static void draw_quarter_0(quarter_draw_dsc_t * q)
{
lv_area_t quarter_area;
if(q->start_quarter == 0 && q->end_quarter == 0 && q->start_angle < q->end_angle) {
/*Small arc here*/
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * q->radius) >> LV_TRIGO_SHIFT);
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
else if(q->start_quarter == 0 || q->end_quarter == 0) {
/*Start and/or end arcs here*/
if(q->start_quarter == 0) {
quarter_area.x1 = q->center_x;
quarter_area.y2 = q->center_y + q->radius;
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
if(q->end_quarter == 0) {
quarter_area.x2 = q->center_x + q->radius;
quarter_area.y1 = q->center_y;
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * q->radius) >> LV_TRIGO_SHIFT);
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
else if((q->start_quarter == q->end_quarter && q->start_quarter != 0 && q->end_angle < q->start_angle) ||
(q->start_quarter == 2 && q->end_quarter == 1) ||
(q->start_quarter == 3 && q->end_quarter == 2) ||
(q->start_quarter == 3 && q->end_quarter == 1)) {
/*Arc crosses here*/
quarter_area.x1 = q->center_x;
quarter_area.y1 = q->center_y;
quarter_area.x2 = q->center_x + q->radius;
quarter_area.y2 = q->center_y + q->radius;
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
static void draw_quarter_1(quarter_draw_dsc_t * q)
{
lv_area_t quarter_area;
if(q->start_quarter == 1 && q->end_quarter == 1 && q->start_angle < q->end_angle) {
/*Small arc here*/
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
else if(q->start_quarter == 1 || q->end_quarter == 1) {
/*Start and/or end arcs here*/
if(q->start_quarter == 1) {
quarter_area.x1 = q->center_x - q->radius;
quarter_area.y1 = q->center_y;
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
if(q->end_quarter == 1) {
quarter_area.x2 = q->center_x - 1;
quarter_area.y2 = q->center_y + q->radius;
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
else if((q->start_quarter == q->end_quarter && q->start_quarter != 1 && q->end_angle < q->start_angle) ||
(q->start_quarter == 0 && q->end_quarter == 2) ||
(q->start_quarter == 0 && q->end_quarter == 3) ||
(q->start_quarter == 3 && q->end_quarter == 2)) {
/*Arc crosses here*/
quarter_area.x1 = q->center_x - q->radius;
quarter_area.y1 = q->center_y;
quarter_area.x2 = q->center_x - 1;
quarter_area.y2 = q->center_y + q->radius;
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
static void draw_quarter_2(quarter_draw_dsc_t * q)
{
lv_area_t quarter_area;
if(q->start_quarter == 2 && q->end_quarter == 2 && q->start_angle < q->end_angle) {
/*Small arc here*/
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * q->radius) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
else if(q->start_quarter == 2 || q->end_quarter == 2) {
/*Start and/or end arcs here*/
if(q->start_quarter == 2) {
quarter_area.x2 = q->center_x - 1;
quarter_area.y1 = q->center_y - q->radius;
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
if(q->end_quarter == 2) {
quarter_area.x1 = q->center_x - q->radius;
quarter_area.y2 = q->center_y - 1;
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
else if((q->start_quarter == q->end_quarter && q->start_quarter != 2 && q->end_angle < q->start_angle) ||
(q->start_quarter == 0 && q->end_quarter == 3) ||
(q->start_quarter == 1 && q->end_quarter == 3) ||
(q->start_quarter == 1 && q->end_quarter == 0)) {
/*Arc crosses here*/
quarter_area.x1 = q->center_x - q->radius;
quarter_area.y1 = q->center_y - q->radius;
quarter_area.x2 = q->center_x - 1;
quarter_area.y2 = q->center_y - 1;
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
static void draw_quarter_3(quarter_draw_dsc_t * q)
{
lv_area_t quarter_area;
if(q->start_quarter == 3 && q->end_quarter == 3 && q->start_angle < q->end_angle) {
/*Small arc here*/
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
else if(q->start_quarter == 3 || q->end_quarter == 3) {
/*Start and/or end arcs here*/
if(q->start_quarter == 3) {
quarter_area.x2 = q->center_x + q->radius;
quarter_area.y2 = q->center_y - 1;
quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
if(q->end_quarter == 3) {
quarter_area.x1 = q->center_x;
quarter_area.y1 = q->center_y - q->radius;
quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
else if((q->start_quarter == q->end_quarter && q->start_quarter != 3 && q->end_angle < q->start_angle) ||
(q->start_quarter == 2 && q->end_quarter == 0) ||
(q->start_quarter == 1 && q->end_quarter == 0) ||
(q->start_quarter == 2 && q->end_quarter == 1)) {
/*Arc crosses here*/
quarter_area.x1 = q->center_x;
quarter_area.y1 = q->center_y - q->radius;
quarter_area.x2 = q->center_x + q->radius;
quarter_area.y2 = q->center_y - 1;
bool ok = _lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
}
}
static void get_rounded_area(int16_t angle, lv_coord_t radius, uint8_t thickness, lv_area_t * res_area)
{
const uint8_t ps = 8;
const uint8_t pa = 127;
int32_t thick_half = thickness / 2;
uint8_t thick_corr = (thickness & 0x01) ? 0 : 1;
int32_t cir_x;
int32_t cir_y;
cir_x = ((radius - thick_half) * lv_trigo_sin(90 - angle)) >> (LV_TRIGO_SHIFT - ps);
cir_y = ((radius - thick_half) * lv_trigo_sin(angle)) >> (LV_TRIGO_SHIFT - ps);
/*Actually the center of the pixel need to be calculated so apply 1/2 px offset*/
if(cir_x > 0) {
cir_x = (cir_x - pa) >> ps;
res_area->x1 = cir_x - thick_half + thick_corr;
res_area->x2 = cir_x + thick_half;
}
else {
cir_x = (cir_x + pa) >> ps;
res_area->x1 = cir_x - thick_half;
res_area->x2 = cir_x + thick_half - thick_corr;
}
if(cir_y > 0) {
cir_y = (cir_y - pa) >> ps;
res_area->y1 = cir_y - thick_half + thick_corr;
res_area->y2 = cir_y + thick_half;
}
else {
cir_y = (cir_y + pa) >> ps;
res_area->y1 = cir_y - thick_half;
res_area->y2 = cir_y + thick_half - thick_corr;
}
}
#endif /*LV_DRAW_COMPLEX*/
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