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box: factor out box_center()

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John Lindgren 2025-11-25 23:25:47 -05:00 • committed by Hiroaki Yamamoto
parent 9f5ff391cc
commit 5ea617a393
3 changed files with 31 additions and 17 deletions
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11
include/common/box.h
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@ -10,6 +10,17 @@ bool box_intersects(struct wlr_box *box_a, struct wlr_box *box_b);
void box_union(struct wlr_box *box_dest, struct wlr_box *box_a,
struct wlr_box *box_b);
/*
* Centers a content box (width & height) within a reference box,
* limiting it (if possible) to not extend outside a bounding box.
*
* The reference box and bounding box are often the same but could be
* different (e.g. when centering a view within its parent but limiting
* to usable output area).
*/
void box_center(int width, int height, const struct wlr_box *ref,
const struct wlr_box *bound, int *x, int *y);
/*
* Fits and centers a content box (width & height) within a bounding box.
* The content box is downscaled if necessary (preserving aspect ratio) but