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#![allow(missing_docs)]
use criterion::{criterion_group, criterion_main, Bencher, Criterion};
use iced::alignment;
use iced::mouse;
use iced::widget::{canvas, scrollable, stack, text};
use iced::{
Color, Element, Font, Length, Pixels, Point, Rectangle, Size, Theme,
};
use iced_wgpu::Renderer;
criterion_main!(benches);
criterion_group!(benches, wgpu_benchmark);
#[allow(unused_results)]
pub fn wgpu_benchmark(c: &mut Criterion) {
c.bench_function("wgpu — canvas (light)", |b| {
benchmark(b, |_| scene(10));
});
c.bench_function("wgpu — canvas (heavy)", |b| {
benchmark(b, |_| scene(1_000));
});
c.bench_function("wgpu - layered text (light)", |b| {
benchmark(b, |_| layered_text(10));
});
c.bench_function("wgpu - layered text (heavy)", |b| {
benchmark(b, |_| layered_text(1_000));
});
c.bench_function("wgpu - dynamic text (light)", |b| {
benchmark(b, |i| dynamic_text(1_000, i));
});
c.bench_function("wgpu - dynamic text (heavy)", |b| {
benchmark(b, |i| dynamic_text(100_000, i));
});
}
fn benchmark<'a>(
bencher: &mut Bencher<'_>,
view: impl Fn(usize) -> Element<'a, (), Theme, Renderer>,
) {
use iced_futures::futures::executor;
use iced_wgpu::graphics;
use iced_wgpu::graphics::Antialiasing;
use iced_wgpu::wgpu;
use iced_winit::core;
use iced_winit::runtime;
let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
backends: wgpu::Backends::all(),
..Default::default()
});
let adapter = executor::block_on(instance.request_adapter(
&wgpu::RequestAdapterOptions {
power_preference: wgpu::PowerPreference::HighPerformance,
compatible_surface: None,
force_fallback_adapter: false,
},
))
.expect("request adapter");
let (device, queue) = executor::block_on(adapter.request_device(
&wgpu::DeviceDescriptor {
label: None,
required_features: wgpu::Features::empty(),
required_limits: wgpu::Limits::default(),
memory_hints: wgpu::MemoryHints::MemoryUsage,
},
None,
))
.expect("request device");
let format = wgpu::TextureFormat::Bgra8UnormSrgb;
let mut engine = iced_wgpu::Engine::new(
&adapter,
&device,
&queue,
format,
Some(Antialiasing::MSAAx4),
);
let mut renderer =
Renderer::new(&device, &engine, Font::DEFAULT, Pixels::from(16));
let viewport =
graphics::Viewport::with_physical_size(Size::new(3840, 2160), 2.0);
let texture = device.create_texture(&wgpu::TextureDescriptor {
label: None,
size: wgpu::Extent3d {
width: 3840,
height: 2160,
depth_or_array_layers: 1,
},
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format,
usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
view_formats: &[],
});
let texture_view =
texture.create_view(&wgpu::TextureViewDescriptor::default());
let mut i = 0;
let mut cache = Some(runtime::user_interface::Cache::default());
bencher.iter(|| {
let mut user_interface = runtime::UserInterface::build(
view(i),
viewport.logical_size(),
cache.take().unwrap(),
&mut renderer,
);
let _ = user_interface.draw(
&mut renderer,
&Theme::Dark,
&core::renderer::Style {
text_color: Color::WHITE,
},
mouse::Cursor::Unavailable,
);
cache = Some(user_interface.into_cache());
let mut encoder =
device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
label: None,
});
renderer.present::<&str>(
&mut engine,
&device,
&queue,
&mut encoder,
Some(Color::BLACK),
format,
&texture_view,
&viewport,
&[],
);
let submission = engine.submit(&queue, encoder);
let _ = device.poll(wgpu::Maintain::WaitForSubmissionIndex(submission));
i += 1;
});
}
fn scene<'a, Message: 'a>(n: usize) -> Element<'a, Message, Theme, Renderer> {
struct Scene {
n: usize,
}
impl<Message, Theme> canvas::Program<Message, Theme, Renderer> for Scene {
type State = canvas::Cache<Renderer>;
fn draw(
&self,
cache: &Self::State,
renderer: &Renderer,
_theme: &Theme,
bounds: Rectangle,
_cursor: mouse::Cursor,
) -> Vec<canvas::Geometry<Renderer>> {
vec![cache.draw(renderer, bounds.size(), |frame| {
for i in 0..self.n {
frame.fill_rectangle(
Point::new(0.0, i as f32),
Size::new(10.0, 10.0),
Color::WHITE,
);
}
for i in 0..self.n {
frame.fill_text(canvas::Text {
content: i.to_string(),
position: Point::new(0.0, i as f32),
color: Color::BLACK,
size: Pixels::from(16),
line_height: text::LineHeight::default(),
font: Font::DEFAULT,
horizontal_alignment: alignment::Horizontal::Left,
vertical_alignment: alignment::Vertical::Top,
shaping: text::Shaping::Basic,
});
}
})]
}
}
canvas(Scene { n })
.width(Length::Fill)
.height(Length::Fill)
.into()
}
fn layered_text<'a, Message: 'a>(
n: usize,
) -> Element<'a, Message, Theme, Renderer> {
stack((0..n).map(|i| text(format!("I am paragraph {i}!")).into()))
.width(Length::Fill)
.height(Length::Fill)
.into()
}
fn dynamic_text<'a, Message: 'a>(
n: usize,
i: usize,
) -> Element<'a, Message, Theme, Renderer> {
const LOREM_IPSUM: &str = include_str!("ipsum.txt");
scrollable(
text(format!(
"{}... Iteration {i}",
std::iter::repeat(LOREM_IPSUM.chars())
.flatten()
.take(n)
.collect::<String>(),
))
.size(10),
)
.into()
}
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