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regions: perform rounding more carefully

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Add percentages (x + width, y + height) before scaling so that there is
no gap between regions due to rounding variations
This commit is contained in:
John Lindgren 2023-10-21 14:02:21 -04:00 • committed by Consolatis
parent 47e80a488e
commit 921c30c1fa
1 changed files with 13 additions and 4 deletions
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17
src/regions.c
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@ -208,10 +208,19 @@ regions_update_geometry(struct output *output)
wl_list_for_each(region, &output->regions, link) {
geo = &region->geo;
perc = &region->percentage;
geo->x = usable.x + usable.width * perc->x / 100;
geo->y = usable.y + usable.height * perc->y / 100;
geo->width = usable.width * perc->width / 100;
geo->height = usable.height * perc->height / 100;
/*
* Add percentages (x + width, y + height) before scaling
* so that there is no gap between regions due to rounding
* variations
*/
int left = usable.width * perc->x / 100;
int right = usable.width * (perc->x + perc->width) / 100;
int top = usable.height * perc->y / 100;
int bottom = usable.height * (perc->y + perc->height) / 100;
geo->x = usable.x + left;
geo->y = usable.y + top;
geo->width = right - left;
geo->height = bottom - top;
region->center.x = geo->x + geo->width / 2;
region->center.y = geo->y + geo->height / 2;
}