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Move resize_region to region.h

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-07-06 13:26:25 +01:00
parent 387e247bcf
commit 640b4b1c99
2 changed files with 52 additions and 32 deletions
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51
src/region.h
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@@ -47,3 +47,54 @@ static inline rect_t *from_x_rects(int nrects, const xcb_rectangle_t *rects) {
}
return ret;
}
/**
* Resize a region.
*/
static inline void _resize_region(const region_t *region, region_t *output, int dx,
int dy) {
if (!region || !output) {
return;
}
if (!dx && !dy) {
if (region != output) {
pixman_region32_copy(output, (region_t *)region);
}
return;
}
// Loop through all rectangles
int nrects;
int nnewrects = 0;
const rect_t *rects = pixman_region32_rectangles((region_t *)region, &nrects);
auto newrects = ccalloc(nrects, rect_t);
for (int i = 0; i < nrects; i++) {
int x1 = rects[i].x1 - dx;
int y1 = rects[i].y1 - dy;
int x2 = rects[i].x2 + dx;
int y2 = rects[i].y2 + dy;
int wid = x2 - x1;
int hei = y2 - y1;
if (wid <= 0 || hei <= 0) {
continue;
}
newrects[nnewrects] =
(rect_t){.x1 = x1, .x2 = x2, .y1 = y1, .y2 = y2};
++nnewrects;
}
pixman_region32_fini(output);
pixman_region32_init_rects(output, newrects, nnewrects);
free(newrects);
}
static inline region_t resize_region(const region_t *region, int dx, int dy) {
region_t ret;
pixman_region32_init(&ret);
_resize_region(region, &ret, dx, dy);
return ret;
}
static inline void resize_region_in_place(region_t *region, int dx, int dy) {
return _resize_region(region, region, dx, dy);
}