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common/box: add box_fit_within()

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Factor out common math from ssd's get_scale_box() for use elsewhere.
This commit is contained in:
John Lindgren 2024-10-05 09:45:48 -04:00
parent 465aac5514
commit 22e50aa4e2
3 changed files with 46 additions and 28 deletions
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21
include/common/box.h
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@ -4,14 +4,23 @@
#include <wlr/util/box.h>
bool
box_contains(struct wlr_box *box_super, struct wlr_box *box_sub);
bool box_contains(struct wlr_box *box_super, struct wlr_box *box_sub);
bool
box_intersects(struct wlr_box *box_a, struct wlr_box *box_b);
bool box_intersects(struct wlr_box *box_a, struct wlr_box *box_b);
/* Returns the bounding box of 2 boxes */
void
box_union(struct wlr_box *box_dest, 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);
/*
* Fits and centers a content box (width & height) within a bounding box
* (max_width & max_height). The content box is downscaled if necessary
* (preserving aspect ratio) but not upscaled.
*
* The returned x & y coordinates are the centered content position
* relative to the top-left corner of the bounding box.
*/
struct wlr_box box_fit_within(int width, int height, int max_width,
int max_height);
#endif /* LABWC_BOX_H */