hekate/nyx/nyx_gui/libs/lvgl/lv_misc/lv_area.c

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/**
* @file lv_area.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_area.h"
#include "lv_math.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize an area
* @param area_p pointer to an area
* @param x1 left coordinate of the area
* @param y1 top coordinate of the area
* @param x2 right coordinate of the area
* @param y2 bottom coordinate of the area
*/
void lv_area_set(lv_area_t * area_p, lv_coord_t x1, lv_coord_t y1, lv_coord_t x2, lv_coord_t y2)
{
area_p->x1 = x1;
area_p->y1 = y1;
area_p->x2 = x2;
area_p->y2 = y2;
}
/**
* Set the width of an area
* @param area_p pointer to an area
* @param w the new width of the area (w == 1 makes x1 == x2)
*/
void lv_area_set_width(lv_area_t * area_p, lv_coord_t w)
{
area_p->x2 = area_p->x1 + w - 1;
}
/**
* Set the height of an area
* @param area_p pointer to an area
* @param h the new height of the area (h == 1 makes y1 == y2)
*/
void lv_area_set_height(lv_area_t * area_p, lv_coord_t h)
{
area_p->y2 = area_p->y1 + h - 1;
}
/**
* Set the position of an area (width and height will be kept)
* @param area_p pointer to an area
* @param x the new x coordinate of the area
* @param y the new y coordinate of the area
*/
void lv_area_set_pos(lv_area_t * area_p, lv_coord_t x, lv_coord_t y)
{
lv_coord_t w = lv_area_get_width(area_p);
lv_coord_t h = lv_area_get_height(area_p);
area_p->x1 = x;
area_p->y1 = y;
lv_area_set_width(area_p, w);
lv_area_set_height(area_p, h);
}
/**
* Return with area of an area (x * y)
* @param area_p pointer to an area
* @return size of area
*/
uint32_t lv_area_get_size(const lv_area_t * area_p)
{
uint32_t size;
size = (uint32_t)(area_p->x2 - area_p->x1 + 1) *
(area_p->y2 - area_p->y1 + 1);
return size;
}
/**
* Get the common parts of two areas
* @param res_p pointer to an area, the result will be stored here
* @param a1_p pointer to the first area
* @param a2_p pointer to the second area
* @return false: the two area has NO common parts, res_p is invalid
*/
bool lv_area_intersect(lv_area_t * res_p, const lv_area_t * a1_p, const lv_area_t * a2_p)
{
/* Get the smaller area from 'a1_p' and 'a2_p' */
res_p->x1 = LV_MATH_MAX(a1_p->x1, a2_p->x1);
res_p->y1 = LV_MATH_MAX(a1_p->y1, a2_p->y1);
res_p->x2 = LV_MATH_MIN(a1_p->x2, a2_p->x2);
res_p->y2 = LV_MATH_MIN(a1_p->y2, a2_p->y2);
/*If x1 or y1 greater then x2 or y2 then the areas union is empty*/
bool union_ok = true;
if((res_p->x1 > res_p->x2) ||
(res_p->y1 > res_p->y2)) {
union_ok = false;
}
return union_ok;
}
/**
* Join two areas into a third which involves the other two
* @param res_p pointer to an area, the result will be stored here
* @param a1_p pointer to the first area
* @param a2_p pointer to the second area
*/
void lv_area_join(lv_area_t * a_res_p, const lv_area_t * a1_p, const lv_area_t * a2_p)
{
a_res_p->x1 = LV_MATH_MIN(a1_p->x1, a2_p->x1);
a_res_p->y1 = LV_MATH_MIN(a1_p->y1, a2_p->y1);
a_res_p->x2 = LV_MATH_MAX(a1_p->x2, a2_p->x2);
a_res_p->y2 = LV_MATH_MAX(a1_p->y2, a2_p->y2);
}
/**
* Check if a point is on an area
* @param a_p pointer to an area
* @param p_p pointer to a point
* @return false:the point is out of the area
*/
bool lv_area_is_point_on(const lv_area_t * a_p, const lv_point_t * p_p)
{
bool is_on = false;
if((p_p->x >= a_p->x1 && p_p->x <= a_p->x2) &&
((p_p->y >= a_p->y1 && p_p->y <= a_p->y2))) {
is_on = true;
}
return is_on;
}
/**
* Check if two area has common parts
* @param a1_p pointer to an area.
* @param a2_p pointer to an other area
* @return false: a1_p and a2_p has no common parts
*/
bool lv_area_is_on(const lv_area_t * a1_p, const lv_area_t * a2_p)
{
if((a1_p->x1 <= a2_p->x2) &&
(a1_p->x2 >= a2_p->x1) &&
(a1_p->y1 <= a2_p->y2) &&
(a1_p->y2 >= a2_p->y1)) {
return true;
} else {
return false;
}
}
/**
* Check if an area is fully on an other
* @param ain_p pointer to an area which could be in 'aholder_p'
* @param aholder pointer to an area which could involve 'ain_p'
* @return
*/
bool lv_area_is_in(const lv_area_t * ain_p, const lv_area_t * aholder_p)
{
bool is_in = false;
if(ain_p->x1 >= aholder_p->x1 &&
ain_p->y1 >= aholder_p->y1 &&
ain_p->x2 <= aholder_p->x2 &&
ain_p->y2 <= aholder_p->y2) {
is_in = true;
}
return is_in;
}
/**********************
* STATIC FUNCTIONS
**********************/