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Changed tesselation functions to take Vertex2D builder instead of using lyon's builtin Point type to avoid extra copies.

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This commit is contained in:
shan 2022-10-06 08:04:43 -07:00
parent cb7c467654
commit f4878a1a66
1 changed files with 31 additions and 17 deletions
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48
graphics/src/widget/canvas/frame.rs
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@ -9,7 +9,6 @@ use crate::Primitive;
use crate::layer::mesh;
use crate::triangle::Vertex2D;
use lyon::tessellation;
use lyon::tessellation::geometry_builder::Positions;
/// The frame of a [`Canvas`].
///
@ -17,10 +16,7 @@ use lyon::tessellation::geometry_builder::Positions;
#[allow(missing_debug_implementations)]
pub struct Frame {
size: Size,
buffers: Vec<(
tessellation::VertexBuffers<lyon::math::Point, u32>,
mesh::Style,
)>,
buffers: Vec<(tessellation::VertexBuffers<Vertex2D, u32>, mesh::Style)>,
primitives: Vec<Primitive>,
transforms: Transforms,
fill_tessellator: tessellation::FillTessellator,
@ -93,7 +89,7 @@ impl Frame {
let mut buf = tessellation::VertexBuffers::new();
let mut buffers =
tessellation::BuffersBuilder::new(&mut buf, Positions);
tessellation::BuffersBuilder::new(&mut buf, Vertex2DBuilder);
let options =
tessellation::FillOptions::default().with_fill_rule(rule.into());
@ -131,7 +127,7 @@ impl Frame {
let mut buf = tessellation::VertexBuffers::new();
let mut buffers =
tessellation::BuffersBuilder::new(&mut buf, Positions);
tessellation::BuffersBuilder::new(&mut buf, Vertex2DBuilder);
let top_left =
self.transforms.current.raw.transform_point(
@ -165,7 +161,7 @@ impl Frame {
let mut buf = tessellation::VertexBuffers::new();
let mut buffers =
tessellation::BuffersBuilder::new(&mut buf, Positions);
tessellation::BuffersBuilder::new(&mut buf, Vertex2DBuilder);
let mut options = tessellation::StrokeOptions::default();
options.line_width = stroke.width;
@ -342,7 +338,7 @@ impl Frame {
if !buffer.indices.is_empty() {
self.primitives.push(Primitive::Mesh2D {
buffers: triangle::Mesh2D {
vertices: vertices_from(buffer.vertices),
vertices: buffer.vertices,
indices: buffer.indices,
},
size: self.size,
@ -355,12 +351,30 @@ impl Frame {
}
}
/// Converts from [`lyon::math::Point`] to [`Vertex2D`]. Used for generating primitives.
fn vertices_from(points: Vec<lyon::math::Point>) -> Vec<Vertex2D> {
points
.iter()
.map(|p| Vertex2D {
position: [p.x, p.y],
})
.collect()
struct Vertex2DBuilder;
impl tessellation::FillVertexConstructor<Vertex2D> for Vertex2DBuilder {
fn new_vertex(
&mut self,
vertex: tessellation::FillVertex<'_>,
) -> Vertex2D {
let position = vertex.position();
Vertex2D {
position: [position.x, position.y],
}
}
}
impl tessellation::StrokeVertexConstructor<Vertex2D> for Vertex2DBuilder {
fn new_vertex(
&mut self,
vertex: tessellation::StrokeVertex<'_, '_>,
) -> Vertex2D {
let position = vertex.position();
Vertex2D {
position: [position.x, position.y],
}
}
}