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We only clamp to the unit interval

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Kovid Goyal
2025-10-11 10:23:35 +05:30
parent c397fc4301
commit ef15aa3f51
1 changed files with 4 additions and 6 deletions
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10
kitty/decorations.c
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@@ -362,16 +362,14 @@ half_height(Canvas *self) { // align with non-supersampled co-ords
}
static double
clamp_double(double value, double lower, double upper) {
if (value < lower) return lower;
if (value > upper) return upper;
return value;
unit_double(double x) {
return x < 0.0 ? 0.0 : (x > 1.0 ? 1.0 : x);
}
static double
smoothstep(double edge0, double edge1, double x) {
if (edge0 == edge1) return x < edge0 ? 0.0 : 1.0;
double t = clamp_double((x - edge0) / (edge1 - edge0), 0.0, 1.0);
double t = unit_double((x - edge0) / (edge1 - edge0));
return t * t * (3.0 - 2.0 * t);
}
@@ -1342,7 +1340,7 @@ rounded_corner(Canvas *self, uint level, Corner which) {
const double alpha = smoothstep(-aa, aa, outer) - smoothstep(-aa, aa, inner);
if (alpha <= 0.0) continue;
const uint8_t value = (uint8_t)lrint(clamp_double(alpha, 0.0, 1.0) * 255.0);
const uint8_t value = (uint8_t)lrint(unit_double(alpha) * 255.0);
uint8_t *p = &self->mask[row_off + x];
if (value > *p) *p = value;
}