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fix: allow negative values for rotating filter

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This commit is contained in:
Pascal Engélibert 2022-08-29 09:54:23 +02:00
parent da1a8351ff
commit 160e881ba7
Signed by: tuxmain
GPG key ID: 3504BC6D362F7DCA
1 changed files with 4 additions and 0 deletions
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4
src/filters.rs
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@ -23,6 +23,10 @@ impl PassThroughFilter {
PassThroughFilter::Rotating(filter_angle) => { PassThroughFilter::Rotating(filter_angle) => {
let mut hsla = color.as_hsla_f32(); let mut hsla = color.as_hsla_f32();
hsla[0] = (hsla[0] + filter_angle) % 360.; hsla[0] = (hsla[0] + filter_angle) % 360.;
// floating rem is not modulo!
if hsla[0] < 0. {
hsla[0] += 360.;
}
Color::hsla(hsla[0], hsla[1], hsla[2], hsla[3]) Color::hsla(hsla[0], hsla[1], hsla[2], hsla[3])
} }
} }