61 lines
2.2 KiB
Rust
61 lines
2.2 KiB
Rust
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// pathfinder/path-utils/src/transform.rs
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//
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// Copyright © 2018 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Applies a transform to paths.
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use euclid::Transform2D;
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use lyon_path::PathEvent;
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pub struct Transform2DPathIter<I> where I: Iterator<Item = PathEvent> {
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inner: I,
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transform: Transform2D<f32>,
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}
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impl<I> Transform2DPathIter<I> where I: Iterator<Item = PathEvent> {
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#[inline]
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pub fn new(inner: I, transform: &Transform2D<f32>) -> Transform2DPathIter<I> {
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Transform2DPathIter {
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inner: inner,
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transform: *transform,
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}
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}
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}
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impl<I> Iterator for Transform2DPathIter<I> where I: Iterator<Item = PathEvent> {
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type Item = PathEvent;
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fn next(&mut self) -> Option<PathEvent> {
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match self.inner.next() {
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Some(PathEvent::MoveTo(to)) => {
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Some(PathEvent::MoveTo(self.transform.transform_point(&to)))
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}
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Some(PathEvent::LineTo(to)) => {
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Some(PathEvent::LineTo(self.transform.transform_point(&to)))
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}
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Some(PathEvent::QuadraticTo(ctrl, to)) => {
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Some(PathEvent::QuadraticTo(self.transform.transform_point(&ctrl),
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self.transform.transform_point(&to)))
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}
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Some(PathEvent::CubicTo(ctrl1, ctrl2, to)) => {
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Some(PathEvent::CubicTo(self.transform.transform_point(&ctrl1),
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self.transform.transform_point(&ctrl2),
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self.transform.transform_point(&to)))
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}
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Some(PathEvent::Arc(center, radius, start, end)) => {
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Some(PathEvent::Arc(self.transform.transform_point(¢er),
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self.transform.transform_vector(&radius),
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start,
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end))
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}
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event => event,
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}
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}
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}
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