1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*
* 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 in the release notes and follow a 1-year
* deprecation schedule.
*/
#ifndef WLR_UTIL_REGION_H
#define WLR_UTIL_REGION_H
#include <stdbool.h>
#include <pixman.h>
#include <wayland-server-protocol.h>
/**
* Scale a region by the specified factor.
*
* The resulting coordinates are rounded up or down so that the new region is
* at least as big as the original one if the scale factor is greater or equal
* to 1.
*
* Also see wlr_region_scale_xy().
*/
void wlr_region_scale(pixman_region32_t *dst, const pixman_region32_t *src,
float scale);
/**
* Scale a region by the specified factors.
*
* The X and Y coordinates are scaled separately by scale_x and scale_y.
*
* The resulting coordinates are rounded up or down so that the new region is
* at least as big as the original one if the scale factor is greater or equal
* to 1.
*/
void wlr_region_scale_xy(pixman_region32_t *dst, const pixman_region32_t *src,
float scale_x, float scale_y);
/**
* Applies a transform to a region inside a box of size `width` x `height`.
*/
void wlr_region_transform(pixman_region32_t *dst, const pixman_region32_t *src,
enum wl_output_transform transform, int width, int height);
/**
* Expands the region by distance on both axis. distance must be
* a non-negative number.
*/
void wlr_region_expand(pixman_region32_t *dst, const 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, const pixman_region32_t *src,
float rotation, int ox, int oy);
/**
* Confine a point inside a region.
*
* x1 and y1 are the old position, x2 and y2 are the new tentative position.
* The function returns true with confined coordinates in x2_out and y2_out if
* the old position is within the region, or false otherwise.
*/
bool wlr_region_confine(const pixman_region32_t *region, double x1, double y1, double x2,
double y2, double *x2_out, double *y2_out);
#endif
|
