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style: Reuse computed rotate animation.

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I have the feeling this fixes a bug, but...

Bug: 1464615
Reviewed-by: hiro
MozReview-Commit-ID: Aj478qCbMV9
This commit is contained in:
Emilio Cobos Álvarez 2018-05-26 16:23:36 +02:00
parent 2e500d70ef
commit 92b856b70a
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GPG key ID: 056B727BB9C1027C
1 changed files with 4 additions and 41 deletions
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45
components/style/properties/helpers/animated_properties.mako.rs
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@ -1300,18 +1300,10 @@ impl Animate for ComputedTransformOperation {
&TransformOperation::Rotate3D(fx, fy, fz, fa),
&TransformOperation::Rotate3D(tx, ty, tz, ta),
) => {
let (fx, fy, fz, fa) = transform::get_normalized_vector_and_angle(fx, fy, fz, fa);
let (tx, ty, tz, ta) = transform::get_normalized_vector_and_angle(tx, ty, tz, ta);
if (fx, fy, fz) == (tx, ty, tz) {
let ia = fa.animate(&ta, procedure)?;
Ok(TransformOperation::Rotate3D(fx, fy, fz, ia))
} else {
let matrix_f = rotate_to_matrix(fx, fy, fz, fa);
let matrix_t = rotate_to_matrix(tx, ty, tz, ta);
Ok(TransformOperation::Matrix3D(
matrix_f.animate(&matrix_t, procedure)?,
))
}
let animated = Rotate::Rotate3D(fx, fy, fz, fa)
.animate(&Rotate::Rotate3D(tx, ty, tz, ta), procedure)?;
let (fx, fy, fz, fa) = ComputedRotate::resolve(&animated);
Ok(TransformOperation::Rotate3D(fx, fy, fz, fa))
},
(
&TransformOperation::RotateX(fa),
@ -1416,35 +1408,6 @@ fn is_matched_operation(first: &ComputedTransformOperation, second: &ComputedTra
}
}
/// <https://www.w3.org/TR/css-transforms-1/#Rotate3dDefined>
fn rotate_to_matrix(x: f32, y: f32, z: f32, a: Angle) -> Matrix3D {
let half_rad = a.radians() / 2.0;
let sc = (half_rad).sin() * (half_rad).cos();
let sq = (half_rad).sin().powi(2);
Matrix3D {
m11: 1.0 - 2.0 * (y * y + z * z) * sq,
m12: 2.0 * (x * y * sq + z * sc),
m13: 2.0 * (x * z * sq - y * sc),
m14: 0.0,
m21: 2.0 * (x * y * sq - z * sc),
m22: 1.0 - 2.0 * (x * x + z * z) * sq,
m23: 2.0 * (y * z * sq + x * sc),
m24: 0.0,
m31: 2.0 * (x * z * sq + y * sc),
m32: 2.0 * (y * z * sq - x * sc),
m33: 1.0 - 2.0 * (x * x + y * y) * sq,
m34: 0.0,
m41: 0.0,
m42: 0.0,
m43: 0.0,
m44: 1.0
}
}
/// A 2d matrix for interpolation.
#[derive(Clone, ComputeSquaredDistance, Copy, Debug)]
#[cfg_attr(feature = "servo", derive(MallocSizeOf))]