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Fix the conversion from Perspective into ComputedMatrix.

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We convert a perspective function into a ComputedMatrix, but we apply the
perspective length to a wrong matrix item. We should put it into m34,
instead of m43. m43 is for translate parameter Z.
This commit is contained in:
Boris Chiou 2017-08-10 17:41:47 +08:00
parent 0eabba3c6f
commit 02277ce4a1
1 changed files with 9 additions and 3 deletions
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12
components/style/properties/helpers/animated_properties.mako.rs
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@ -1474,11 +1474,17 @@ fn add_weighted_transform_lists(from_list: &[TransformOperation],
}
}
(&TransformOperation::Perspective(fd),
&TransformOperation::Perspective(_td)) => {
&TransformOperation::Perspective(td)) => {
let mut fd_matrix = ComputedMatrix::identity();
let mut td_matrix = ComputedMatrix::identity();
fd_matrix.m43 = -1. / fd.to_f32_px();
td_matrix.m43 = -1. / _td.to_f32_px();
if fd.0 > 0 {
fd_matrix.m34 = -1. / fd.to_f32_px();
}
if td.0 > 0 {
td_matrix.m34 = -1. / td.to_f32_px();
}
let sum = fd_matrix.add_weighted(&td_matrix, self_portion, other_portion)
.unwrap();
result.push(TransformOperation::Matrix(sum));