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Clip and cull Mesh2D primitives in iced_wgpu

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This commit is contained in:
Héctor Ramón Jiménez 2020-04-28 04:41:09 +02:00
parent 69c60d372c
commit e65585ae17
5 changed files with 45 additions and 25 deletions
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36
wgpu/src/renderer.rs
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@ -29,7 +29,7 @@ pub struct Renderer {
struct Layer<'a> {
bounds: Rectangle<u32>,
quads: Vec<Quad>,
meshes: Vec<(Vector, &'a triangle::Mesh2D)>,
meshes: Vec<(Vector, Rectangle<u32>, &'a triangle::Mesh2D)>,
text: Vec<wgpu_glyph::Section<'a>>,
#[cfg(any(feature = "image", feature = "svg"))]
@ -48,6 +48,12 @@ impl<'a> Layer<'a> {
images: Vec::new(),
}
}
pub fn intersection(&self, rectangle: Rectangle) -> Option<Rectangle<u32>> {
let layer_bounds: Rectangle<f32> = self.bounds.into();
layer_bounds.intersection(&rectangle).map(Into::into)
}
}
impl Renderer {
@ -214,10 +220,20 @@ impl Renderer {
border_color: border_color.into_linear(),
});
}
Primitive::Mesh2D { buffers } => {
Primitive::Mesh2D { size, buffers } => {
let layer = layers.last_mut().unwrap();
layer.meshes.push((translation, buffers));
// Only draw visible content
if let Some(clip_bounds) = layer.intersection(Rectangle::new(
Point::new(translation.x, translation.y),
*size,
)) {
layer.meshes.push((
translation,
clip_bounds.into(),
buffers,
));
}
}
Primitive::Clip {
bounds,
@ -226,16 +242,10 @@ impl Renderer {
} => {
let layer = layers.last_mut().unwrap();
let layer_bounds: Rectangle<f32> = layer.bounds.into();
let clip = Rectangle {
x: bounds.x + translation.x,
y: bounds.y + translation.y,
..*bounds
};
// Only draw visible content
if let Some(clip_bounds) = layer_bounds.intersection(&clip) {
if let Some(clip_bounds) =
layer.intersection(*bounds + translation)
{
let clip_layer = Layer::new(clip_bounds.into());
let new_layer = Layer::new(layer.bounds);
@ -356,8 +366,8 @@ impl Renderer {
target_width,
target_height,
scaled,
scale_factor,
&layer.meshes,
bounds,
);
}