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add color interpolation for ARGBu8x4

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Gered 2023-04-30 16:41:38 -04:00
parent 0112e99fc7
commit 448ce11dbc
1 changed files with 20 additions and 0 deletions
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20
ggdt/src/graphics/color.rs
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@ -610,6 +610,10 @@ impl ARGBu8x4 {
self.0.to_array()
}
#[inline]
pub fn lerp(&self, other: Self, t: f32) -> Self {
ARGBu8x4((self.0.cast() + (other.0 - self.0).cast() * simd::f32x4::splat(t)).cast())
}
}
impl Mul for ARGBu8x4 {
@ -923,6 +927,22 @@ mod tests {
assert_eq!([0x7f, 0x03, 0x00, 0x14], color.to_array());
}
#[test]
fn argbu8x4_lerping() {
assert_eq!(
[0x7f, 0x11, 0x22, 0x33],
(ARGBu8x4::from(0x7f112233).lerp(ARGBu8x4::from(0xffaabbcc), 0.0).to_array())
);
assert_eq!(
[0xbf, 0x5d, 0x6e, 0x7f],
(ARGBu8x4::from(0x7f112233).lerp(ARGBu8x4::from(0xffaabbcc), 0.5).to_array())
);
assert_eq!(
[0xff, 0xaa, 0xbb, 0xcc],
(ARGBu8x4::from(0x7f112233).lerp(ARGBu8x4::from(0xffaabbcc), 1.0).to_array())
);
}
#[test]
fn argbf32x4() {
let mut color = ARGBf32x4(simd::f32x4::from_array([0.5, 0.1, 0.2, 0.3]));