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|
use std::sync::Arc;
use image::EncodableLayout;
use log::info;
use rand::Rng;
use wgpu::{Extent3d, Texture, TextureUsages};
use crate::{
app::App,
diff::Differ,
export::Exporter,
helper::write_texture,
paint::{PaintUniforms, Painter},
};
#[allow(unused)]
pub struct Approximator {
app: Arc<App>,
size: Extent3d,
differ: Differ,
painter: Painter,
exporter: Exporter,
tex_approx: Texture,
tex_savestate: Texture,
tex_target: Texture,
}
impl Approximator {
pub fn new(app: &Arc<App>, tex_target: Texture, size: Extent3d) -> Self {
let App { device, queue, .. } = app.as_ref();
let tex_approx = device.create_texture(&wgpu::TextureDescriptor {
size,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8Unorm,
usage: TextureUsages::COPY_DST
| TextureUsages::TEXTURE_BINDING
| TextureUsages::STORAGE_BINDING
| TextureUsages::COPY_SRC,
label: None,
});
let tex_savestate = device.create_texture(&wgpu::TextureDescriptor {
size,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8Unorm,
usage: TextureUsages::COPY_DST | TextureUsages::COPY_SRC,
label: None,
});
let img_initial = image::open("a/initial.png").unwrap().into_rgba8();
write_texture(queue, &tex_approx, img_initial.as_bytes(), size);
let differ = Differ::new(&app, size, &tex_approx, &tex_target);
let painter = Painter::new(&app, size, &tex_approx);
let exporter = Exporter::new(&app, size);
Approximator {
app: app.clone(),
size,
differ,
tex_savestate,
tex_approx,
tex_target,
painter,
exporter,
}
}
pub fn save(&self) {
self.app
.copy_texture(&self.tex_approx, &self.tex_savestate, self.size);
}
pub fn restore(&self) {
self.app
.copy_texture(&self.tex_savestate, &self.tex_approx, self.size);
}
pub async fn run(&mut self) {
for _ in 0..10 {
let mut p = PaintUniforms {
x: rand::thread_rng().gen_range(0.0..256.0),
y: rand::thread_rng().gen_range(0.0..256.0),
r: rand::thread_rng().gen_range(0.0..1.0),
g: rand::thread_rng().gen_range(0.0..1.0),
b: rand::thread_rng().gen_range(0.0..1.0),
radius: rand::thread_rng().gen_range(5.0..10.0),
};
// Find initial diff
self.save();
self.painter.run(p);
let mut cd = pollster::block_on(self.differ.run());
info!("initial diff={cd}");
self.restore();
self.save();
loop {
let mut q = 0;
q += self.optimize_param(&mut cd, &mut p, "more red", |p| p.r += 0.1);
q += self.optimize_param(&mut cd, &mut p, "less red", |p| p.r -= 0.1);
q += self.optimize_param(&mut cd, &mut p, "more green", |p| p.g += 0.1);
q += self.optimize_param(&mut cd, &mut p, "less green", |p| p.g -= 0.1);
q += self.optimize_param(&mut cd, &mut p, "more blue", |p| p.b += 0.1);
q += self.optimize_param(&mut cd, &mut p, "less blue", |p| p.b -= 0.1);
q += self.optimize_param(&mut cd, &mut p, "increase radius", |p| p.radius *= 1.5);
q += self.optimize_param(&mut cd, &mut p, "decrease radius", |p| p.radius *= 1.5);
q += self.optimize_param(&mut cd, &mut p, "move right", |p| p.x += 5.0);
q += self.optimize_param(&mut cd, &mut p, "move left", |p| p.x -= 5.0);
q += self.optimize_param(&mut cd, &mut p, "move down", |p| p.y += 5.0);
q += self.optimize_param(&mut cd, &mut p, "move up", |p| p.y -= 5.0);
if q == 0 {
break;
}
}
self.painter.run(p);
}
self.exporter.run(&self.tex_approx, "a/approx.png").await;
}
pub fn optimize_param<F>(
&self,
current_diff: &mut u32,
params: &mut PaintUniforms,
label: &'static str,
f: F,
) -> usize
where
F: Fn(&mut PaintUniforms) -> (),
{
let mut p = params.clone();
let mut i = 0;
loop {
f(&mut p);
self.painter.run(p);
let diff = pollster::block_on(self.differ.run());
// pollster::block_on(self.exporter.run(&self.tex_approx, &format!("a/snap.png")));
self.restore();
if diff >= *current_diff {
break i;
}
info!("applied {label:?} (before={current_diff} after={diff})");
i += 1;
*current_diff = diff;
}
}
}
|
