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Fix implicit conversion of floats to ints in calls to pixman_region32_contains_point

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I do not think the conversion is specifically defined, but on my system and SirCmpwn's
the floats are rounded instead of floored, which is incorrect in this case, since
for a range from 0 to 256, any value greater or equal to 0 and less than 256 is valid.
I.e. [0;256[, or 0 <= x < 256, but if x is e.g. -0.1, then it will be rounded to 0, which
is invalid. The correct behavior would be to floor to -1.
This commit is contained in:
Las 2018-09-18 13:05:44 +02:00
parent fa2e6e7d9d
commit afa2e399aa
3 changed files with 5 additions and 5 deletions
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2
util/region.c
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@ -241,7 +241,7 @@ static void region_confine(pixman_region32_t *region, double x1, double y1, doub
bool wlr_region_confine(pixman_region32_t *region, double x1, double y1, double x2,
double y2, double *x2_out, double *y2_out) {
pixman_box32_t box;
if (pixman_region32_contains_point(region, x1, y1, &box)) {
if (pixman_region32_contains_point(region, floor(x1), floor(y1), &box)) {
region_confine(region, x1, y1, x2, y2, x2_out, y2_out, box);
return true;
} else {