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Remove vec allocation

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This commit is contained in:
Cory Forsstrom 2022-01-27 10:01:03 -08:00
parent e835cea03c
commit 730c57ba67
1 changed files with 35 additions and 34 deletions
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69
graphics/src/widget/canvas/path.rs
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@ -72,41 +72,42 @@ impl Path {
}
pub(super) fn dashed(path: &Path, line_dash: LineDash) -> Path {
let segments_odd = line_dash.segments.len() % 2 == 1;
let segments = segments_odd
.then(|| [&line_dash.segments[..], &line_dash.segments[..]].concat())
.unwrap_or(line_dash.segments);
let mut points = vec![];
walk_along_path(
path.raw().iter().flattened(0.01),
0.0,
&mut RepeatedPattern {
callback: |position: lyon_algorithms::math::Point,
_tangent,
_distance| {
points.push(Point {
x: position.x,
y: position.y,
});
true
},
index: line_dash.offset,
intervals: &segments,
},
);
Path::new(|builder| {
for (idx, point) in points.into_iter().enumerate() {
let is_even = idx % 2 == 0;
let segments_odd = line_dash.segments.len() % 2 == 1;
if is_even {
builder.move_to(point);
} else {
builder.line_to(point);
}
}
let segments = segments_odd
.then(|| {
[&line_dash.segments[..], &line_dash.segments[..]].concat()
})
.unwrap_or(line_dash.segments);
let mut draw_line = false;
walk_along_path(
path.raw().iter().flattened(0.01),
0.0,
&mut RepeatedPattern {
callback: |position: lyon_algorithms::math::Point,
_tangent,
_distance| {
let point = Point {
x: position.x,
y: position.y,
};
if draw_line {
builder.line_to(point);
} else {
builder.move_to(point);
}
draw_line = !draw_line;
true
},
index: line_dash.offset,
intervals: &segments,
},
);
})
}