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Implement to_transform_3d_matrix for computing distance of mismatched transform lists.

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We could use this method to convert a TransformList into a Matrix, and
use this matrix for computing distance for Stylo and rendering the transform
for Servo.

This is an equivalent of nsStyleTransformMatrix::ReadTransforms in Gecko.
This commit is contained in:
Boris Chiou 2017-08-22 10:25:35 +08:00
parent 772a8464eb
commit 5c2d8507be
5 changed files with 215 additions and 146 deletions
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17
components/layout/model.rs
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@ -7,11 +7,10 @@
#![deny(unsafe_code)]
use app_units::Au;
use euclid::{Transform3D, SideOffsets2D, Size2D};
use euclid::{SideOffsets2D, Size2D};
use fragment::Fragment;
use std::cmp::{max, min};
use std::fmt;
use style::computed_values::transform::ComputedMatrix;
use style::logical_geometry::{LogicalMargin, WritingMode};
use style::properties::ComputedValues;
use style::values::computed::{BorderCornerRadius, LengthOrPercentageOrAuto};
@ -508,20 +507,6 @@ pub fn specified_margin_from_style(style: &ComputedValues,
MaybeAuto::from_style(margin_style.margin_left, Au(0)).specified_or_zero()))
}
pub trait ToGfxMatrix {
fn to_gfx_matrix(&self) -> Transform3D<f32>;
}
impl ToGfxMatrix for ComputedMatrix {
fn to_gfx_matrix(&self) -> Transform3D<f32> {
Transform3D::row_major(
self.m11 as f32, self.m12 as f32, self.m13 as f32, self.m14 as f32,
self.m21 as f32, self.m22 as f32, self.m23 as f32, self.m24 as f32,
self.m31 as f32, self.m32 as f32, self.m33 as f32, self.m34 as f32,
self.m41 as f32, self.m42 as f32, self.m43 as f32, self.m44 as f32)
}
}
/// A min-size and max-size constraint. The constructor has a optional `border`
/// parameter, and when it is present the constraint will be subtracted. This is
/// used to adjust the constraint for `box-sizing: border-box`, and when you do so