Trait MatrixHelpers

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pub trait MatrixHelpers<Src, Dst> {
Show 13 methods    // Required methods
    fn preserves_2d_axis_alignment(&self) -> bool;
    fn has_perspective_component(&self) -> bool;
    fn coplanar_scale_factors(&self) -> Option<(f32, f32)>;
    fn has_2d_inverse(&self) -> bool;
    fn exceeds_2d_scale(&self, limit: f64) -> bool;
    fn inverse_project(
        &self,
        target: &Point2D<f32, Dst>,
    ) -> Option<Point2D<f32, Src>>;
    fn inverse_rect_footprint(
        &self,
        rect: &Box2D<f32, Dst>,
    ) -> Option<Box2D<f32, Src>>;
    fn is_simple_translation(&self) -> bool;
    fn is_simple_2d_translation(&self) -> bool;
    fn is_2d_scale_translation(&self) -> bool;
    fn determinant_2d(&self) -> f32;
    fn flatten_z_output(&mut self);
    fn cast_unit<NewSrc, NewDst>(&self) -> Transform3D<f32, NewSrc, NewDst>;
}

Required Methods§

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fn preserves_2d_axis_alignment(&self) -> bool

A port of the preserves2dAxisAlignment function in Skia. Defined in the SkMatrix44 class.

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fn has_perspective_component(&self) -> bool

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fn coplanar_scale_factors(&self) -> Option<(f32, f32)>

Scale factors for content that is coplanar in the source space (z=0), which is the case for the contents of a picture surface. Returns None if the perspective divide varies across that plane, where no single scale factor is correct.

Much weaker than is_2d_on_z_plane: this only asks how the plane is mapped, not that mapping it back through inverse() agrees, so a constant w != 1 is fine (it divides out) and the z terms don’t matter at all.

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fn has_2d_inverse(&self) -> bool

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fn exceeds_2d_scale(&self, limit: f64) -> bool

Check if the matrix post-scaling on either the X or Y axes could cause geometry transformed by this matrix to have scaling exceeding the supplied limit.

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