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83 lines
1.9 KiB
83 lines
1.9 KiB
#include <limits.h>
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#include <stdlib.h>
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#include <math.h>
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#include <stdbool.h>
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#include <wlr/types/wlr_geometry.h>
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#include <wlr/util/log.h>
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static double get_distance(double x1, double y1, double x2, double y2) {
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double distance;
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distance = sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
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return distance;
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}
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void wlr_geometry_closest_boundary(struct wlr_geometry *geo, double x, double y,
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int *dest_x, int *dest_y, double *distance) {
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// find the closest x point
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if (x < geo->x) {
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*dest_x = geo->x;
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} else if (x > geo->x + geo->width) {
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*dest_x = geo->x + geo->width;
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} else {
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*dest_x = x;
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}
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// find closest y point
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if (y < geo->y) {
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*dest_y = geo->y;
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} else if (y > geo->y + geo->height) {
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*dest_y = geo->y + geo->height;
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} else {
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*dest_y = y;
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}
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// calculate distance
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if (distance) {
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*distance = get_distance(*dest_x, *dest_y, x, y);
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}
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}
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#ifndef max
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#define max(a,b) ((a) > (b) ? (a) : (b))
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#endif
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#ifndef min
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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bool wlr_geometry_empty(struct wlr_geometry *geo) {
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return geo == NULL || geo->width <= 0 || geo->height <= 0;
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}
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bool wlr_geometry_intersection(struct wlr_geometry *geo_a,
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struct wlr_geometry *geo_b, struct wlr_geometry **geo_dest) {
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struct wlr_geometry *dest = *geo_dest;
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bool a_empty = wlr_geometry_empty(geo_a);
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bool b_empty = wlr_geometry_empty(geo_b);
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if (a_empty || b_empty) {
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dest->x = 0;
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dest->y = 0;
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dest->width = -100;
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dest->height = -100;
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return false;
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}
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int x1 = max(geo_a->x, geo_b->x);
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int y1 = max(geo_a->y, geo_b->y);
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int x2 = min(geo_a->x + geo_a->width, geo_b->x + geo_b->width);
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int y2 = min(geo_a->y + geo_a->height, geo_b->y + geo_b->height);
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dest->x = x1;
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dest->y = y1;
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dest->width = x2 - x1;
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dest->height = y2 - y1;
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return !wlr_geometry_empty(dest);
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}
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bool wlr_geometry_contains_point(struct wlr_geometry *geo, int x, int y) {
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return x >= geo->x && x <= geo->x + geo->width &&
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y >= geo->y && y <= geo->y + geo->height;
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}
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