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Implement recompose_matrix function

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Nazım Can Altınova 2016-09-06 18:53:20 +03:00
parent 61e2d85435
commit 10b631dfd1
1 changed files with 44 additions and 0 deletions
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44
components/style/properties/helpers/animated_properties.mako.rs
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@ -919,6 +919,50 @@ impl Interpolate for LengthOrNone {
} }
} }
/// https://drafts.csswg.org/css-transforms/#recomposing-to-a-2d-matrix
fn recompose_matrix(decomposed: MatrixDecomposed2D) -> ComputedMatrix {
let mut computed_matrix = ComputedMatrix::identity();
computed_matrix.m11 = decomposed.matrix.m11;
computed_matrix.m12 = decomposed.matrix.m12;
computed_matrix.m21 = decomposed.matrix.m21;
computed_matrix.m22 = decomposed.matrix.m22;
// Translate matrix.
computed_matrix.m41 = decomposed.translate.0 * decomposed.matrix.m11 +
decomposed.translate.1 * decomposed.matrix.m21;
computed_matrix.m42 = decomposed.translate.0 * decomposed.matrix.m11 +
decomposed.translate.1 * decomposed.matrix.m21;
// Rotate matrix.
let angle = decomposed.angle.to_radians();
let cos_angle = angle.cos();
let sin_angle = angle.sin();
let mut rotate_matrix = ComputedMatrix::identity();
rotate_matrix.m11 = cos_angle;
rotate_matrix.m12 = sin_angle;
rotate_matrix.m21 = -sin_angle;
rotate_matrix.m22 = cos_angle;
let matrix_clone = computed_matrix.clone();
// Multiplication of computed_matrix and rotate_matrix
% for i in range(1, 5):
% for j in range(1, 5):
computed_matrix.m${i}${j} = (matrix_clone.m${i}1 * rotate_matrix.m1${j}) +
(matrix_clone.m${i}2 *rotate_matrix.m2${j}) +
(matrix_clone.m${i}3 * rotate_matrix.m3${j}) +
(matrix_clone.m${i}4 * rotate_matrix.m4${j});
% endfor
% endfor
// Scale matrix.
computed_matrix.m11 *= decomposed.scale.0;
computed_matrix.m12 *= decomposed.scale.0;
computed_matrix.m21 *= decomposed.scale.1;
computed_matrix.m22 *= decomposed.scale.1;
computed_matrix
}
/// https://drafts.csswg.org/css-transforms/#interpolation-of-transforms /// https://drafts.csswg.org/css-transforms/#interpolation-of-transforms
impl Interpolate for TransformList { impl Interpolate for TransformList {
#[inline] #[inline]