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#include "maths.h"
#include "rect.h"
Rect* rect_clip(Rect* r, const Rect* c) {
int n;
int x = r->x, y = r->y;
if ((n = c->x - r->x) > 0) {
r->w -= n;
r->x += n;
}
if ((n = c->y - r->y) > 0) {
r->h -= n;
r->y += n;
}
if ((n = x + r->w - (c->x + c->w)) > 0)
r->w -= n;
if ((n = y + r->h - (c->y + c->h)) > 0)
r->h -= n;
return r;
}
Rect* rect_clipr(Rect* r, const int* c) {
int n;
int x = r->x, y = r->y;
if ((n = c[0] - r->x) > 0) {
r->w -= n;
r->x += n;
}
if ((n = c[1] - r->y) > 0) {
r->h -= n;
r->y += n;
}
if ((n = x + r->w - c[2]) > 0)
r->w -= n;
if ((n = y + r->h - c[3]) > 0)
r->h -= n;
return r;
}
Rect* rect_clips(Rect* r, Rect* s, const Rect* c) {
int n;
int x = r->x, y = r->y;
if ((n = c->x - r->x) > 0) {
r->w -= n;
r->x += n;
s->w -= n;
s->x += n;
}
if ((n = c->y - r->y) > 0) {
r->h -= n;
r->y += n;
s->h -= n;
s->y += n;
}
if ((n = x + r->w - (c->x + c->w)) > 0) {
r->w -= n;
s->w -= n;
}
if ((n = y + r->h - (c->y + c->h)) > 0) {
r->h -= n;
s->h -= n;
}
return r;
}
Rect* rect_clipsr(Rect* r, Rect* s, const int* c) {
int n;
int x = r->x, y = r->y;
if ((n = c[0] - r->x) > 0) {
r->w -= n;
r->x += n;
s->w -= n;
s->x += n;
}
if ((n = c[1] - r->y) > 0) {
r->h -= n;
r->y += n;
s->h -= n;
s->y += n;
}
if ((n = x + r->w - c[2]) > 0) {
r->w -= n;
s->w -= n;
}
if ((n = y + r->h - c[3]) > 0) {
r->h -= n;
s->h -= n;
}
return r;
}
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