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/*
* This is a stable interface of wlroots. Future changes will be limited to:
*
* - New functions
* - New struct members
* - New enum members
*
* Note that wlroots does not make an ABI compatibility promise - in the future,
* the layout and size of structs used by wlroots may change, requiring code
* depending on this header to be recompiled (but not edited).
*
* Breaking changes are announced by email and follow a 1-year deprecation
* schedule. Send an email to ~sircmpwn/wlroots-announce+subscribe@lists.sr.ht
* to receive these announcements.
*/
#ifndef WLR_UTIL_REGION_H
#define WLR_UTIL_REGION_H
#include <stdbool.h>
#include <pixman.h>
#include <wayland-server-protocol.h>
/**
* Scales a region, ie. multiplies all its coordinates by `scale`.
*
* The resulting coordinates are rounded up or down so that the new region is
* at least as big as the original one.
*/
void wlr_region_scale(pixman_region32_t *dst, pixman_region32_t *src,
float scale);
/**
* Applies a transform to a region inside a box of size `width` x `height`.
*/
void wlr_region_transform(pixman_region32_t *dst, pixman_region32_t *src,
enum wl_output_transform transform, int width, int height);
/**
* Expands the region of `distance`. If `distance` is negative, it shrinks the
* region.
*/
void wlr_region_expand(pixman_region32_t *dst, pixman_region32_t *src,
int distance);
/*
* Builds the smallest possible region that contains the region rotated about
* the point (ox, oy).
*/
void wlr_region_rotated_bounds(pixman_region32_t *dst, pixman_region32_t *src,
float rotation, int ox, int oy);
bool wlr_region_confine(pixman_region32_t *region, double x1, double y1, double x2,
double y2, double *x2_out, double *y2_out);
#endif
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