215 lines
7.4 KiB
Rust
215 lines
7.4 KiB
Rust
|
#![allow(dead_code, unused_imports, unused_variables, unused_macros)]
|
||
|
|
/// Grid-search stroke MAE tuning against Photoshop ground-truth PNGs.
|
||
|
|
///
|
||
|
|
/// Expects `_tmp/stroke_png_set/` with transparent PNGs exported
|
||
|
|
/// from `_tmp/stroke_psd_set/`.
|
||
|
|
|
||
|
|
use std::io::Write;
|
||
|
|
|
||
|
|
const GT_DIR: &str = "_tmp/stroke_png_set";
|
||
|
|
const CANVAS: u32 = 256;
|
||
|
|
const MARGIN: u32 = 96;
|
||
|
|
const RESULTS_FILE: &str = "stroke_grid_results.txt";
|
||
|
|
|
||
|
|
struct Sample {
|
||
|
|
name: String,
|
||
|
|
position: String,
|
||
|
|
size: f32,
|
||
|
|
opacity: f32,
|
||
|
|
color: [u8; 4],
|
||
|
|
ref_pixels: Vec<u8>,
|
||
|
|
content_mask: Vec<bool>,
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let entries: Vec<_> = std::fs::read_dir(GT_DIR)
|
||
|
|
.unwrap_or_else(|e| panic!("cannot read {}: {}", GT_DIR, e))
|
||
|
|
.filter_map(|e| e.ok())
|
||
|
|
.filter(|e| {
|
||
|
|
let s = e.file_name();
|
||
|
|
let s = s.to_string_lossy();
|
||
|
|
s.starts_with("st_") && s.ends_with(".png")
|
||
|
|
})
|
||
|
|
.collect();
|
||
|
|
|
||
|
|
println!("Found {} PNGs in {}", entries.len(), GT_DIR);
|
||
|
|
|
||
|
|
let mut samples: Vec<Sample> = Vec::new();
|
||
|
|
|
||
|
|
for entry in &entries {
|
||
|
|
let path = entry.path();
|
||
|
|
let stem = path.file_stem().unwrap().to_string_lossy().to_string();
|
||
|
|
|
||
|
|
let params = match parse_filename(&stem) {
|
||
|
|
Some(p) => p,
|
||
|
|
None => { eprintln!(" SKIP: {}", stem); continue; }
|
||
|
|
};
|
||
|
|
|
||
|
|
let (position, size, opacity, color) = params;
|
||
|
|
|
||
|
|
let img = match image::open(&path) {
|
||
|
|
Ok(i) => i,
|
||
|
|
Err(e) => { eprintln!(" SKIP {}: {}", stem, e); continue; }
|
||
|
|
};
|
||
|
|
|
||
|
|
let rgba = img.to_rgba8();
|
||
|
|
let raw = rgba.into_raw();
|
||
|
|
let npix = (CANVAS * CANVAS) as usize;
|
||
|
|
let mut content_mask = vec![false; npix];
|
||
|
|
for i in 0..npix {
|
||
|
|
content_mask[i] = raw[i * 4 + 3] > 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
samples.push(Sample {
|
||
|
|
name: stem,
|
||
|
|
position, size, opacity, color,
|
||
|
|
ref_pixels: raw,
|
||
|
|
content_mask,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
println!("Loaded {} samples", samples.len());
|
||
|
|
if samples.is_empty() {
|
||
|
|
eprintln!("No valid samples found.");
|
||
|
|
std::process::exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
let content_count = samples[0].content_mask.iter().filter(|&&b| b).count();
|
||
|
|
println!("Content pixels per image: {} / {} ({:.1}%)",
|
||
|
|
content_count, npix(), content_count as f64 / npix() as f64 * 100.0);
|
||
|
|
|
||
|
|
let rect_alpha: Vec<u8> = {
|
||
|
|
let n = npix();
|
||
|
|
let mut a = vec![0u8; n];
|
||
|
|
for y in 0..CANVAS {
|
||
|
|
for x in 0..CANVAS {
|
||
|
|
if x >= MARGIN && x < CANVAS - MARGIN && y >= MARGIN && y < CANVAS - MARGIN {
|
||
|
|
a[(y * CANVAS + x) as usize] = 255;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
a
|
||
|
|
};
|
||
|
|
|
||
|
|
let anti_alias_widths: &[f32] = &[0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0];
|
||
|
|
let feathers: &[f32] = &[0.0, 0.5, 1.0, 1.5, 2.0];
|
||
|
|
|
||
|
|
let total_combos = anti_alias_widths.len() * feathers.len();
|
||
|
|
println!("Grid: {} combos x {} samples = {} evals", total_combos, samples.len(), total_combos * samples.len());
|
||
|
|
std::io::stdout().flush().ok();
|
||
|
|
|
||
|
|
let mut best_avg_mae = f64::MAX;
|
||
|
|
let mut best_params = (0.0f32, 0.0f32);
|
||
|
|
let mut eval_count = 0usize;
|
||
|
|
|
||
|
|
for &aa in anti_alias_widths {
|
||
|
|
for &feather in feathers {
|
||
|
|
let mut total_mae = 0.0f64;
|
||
|
|
|
||
|
|
for s in &samples {
|
||
|
|
let pos_enum = match s.position.as_str() {
|
||
|
|
"inside" => hcie_fx::types::StrokePosition::Inside,
|
||
|
|
"center" => hcie_fx::types::StrokePosition::Center,
|
||
|
|
"outside" => hcie_fx::types::StrokePosition::Outside,
|
||
|
|
_ => hcie_fx::types::StrokePosition::Outside,
|
||
|
|
};
|
||
|
|
|
||
|
|
let stroke = hcie_fx::tuned::generate_stroke_tuned(
|
||
|
|
&rect_alpha, CANVAS, CANVAS,
|
||
|
|
s.size, pos_enum, s.color, s.opacity,
|
||
|
|
aa, feather,
|
||
|
|
);
|
||
|
|
|
||
|
|
let px = npix();
|
||
|
|
let mut out = vec![0u8; px * 4];
|
||
|
|
for i in 0..px {
|
||
|
|
if rect_alpha[i] > 0 {
|
||
|
|
out[i * 4] = 0;
|
||
|
|
out[i * 4 + 1] = 0;
|
||
|
|
out[i * 4 + 2] = 0;
|
||
|
|
out[i * 4 + 3] = 255;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Composite stroke with Normal blend
|
||
|
|
for i in 0..px {
|
||
|
|
let sa = stroke[i * 4 + 3];
|
||
|
|
if sa == 0 { continue; }
|
||
|
|
let dst = [out[i * 4], out[i * 4 + 1], out[i * 4 + 2], out[i * 4 + 3]];
|
||
|
|
let src = [stroke[i * 4], stroke[i * 4 + 1], stroke[i * 4 + 2], sa];
|
||
|
|
let blended = hcie_blend::blend_pixels(dst, src, hcie_blend::BlendMode::Normal, 1.0);
|
||
|
|
out[i * 4..i * 4 + 4].copy_from_slice(&blended);
|
||
|
|
}
|
||
|
|
|
||
|
|
let mut diff_sum = 0.0f64;
|
||
|
|
let mut content_pixels = 0u64;
|
||
|
|
for i in 0..px {
|
||
|
|
if !s.content_mask[i] { continue; }
|
||
|
|
content_pixels += 1;
|
||
|
|
for c in 0..4 {
|
||
|
|
diff_sum += (out[i * 4 + c] as i32 - s.ref_pixels[i * 4 + c] as i32).abs() as f64;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if content_pixels > 0 {
|
||
|
|
total_mae += diff_sum / content_pixels as f64 / 4.0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
eval_count += 1;
|
||
|
|
let avg_mae = total_mae / samples.len() as f64;
|
||
|
|
|
||
|
|
if avg_mae < best_avg_mae {
|
||
|
|
best_avg_mae = avg_mae;
|
||
|
|
best_params = (aa, feather);
|
||
|
|
println!("*** [{}/{}] NEW BEST avg MAE = {:.4} (aa={:.2}, feather={:.2})",
|
||
|
|
eval_count, total_combos, best_avg_mae, aa, feather);
|
||
|
|
std::io::stdout().flush().ok();
|
||
|
|
} else if eval_count % 10 == 0 {
|
||
|
|
println!(" [{}/{}] avg={:.4} best={:.4}", eval_count, total_combos, avg_mae, best_avg_mae);
|
||
|
|
std::io::stdout().flush().ok();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
let (baa, bf) = best_params;
|
||
|
|
println!("\n=== RESULT ===");
|
||
|
|
println!("Best avg MAE = {:.4}", best_avg_mae);
|
||
|
|
println!(" anti_alias_width = {:.2}", baa);
|
||
|
|
println!(" feather = {:.2}", bf);
|
||
|
|
|
||
|
|
if let Ok(mut file) = std::fs::OpenOptions::new()
|
||
|
|
.create(true).write(true).truncate(true).open(RESULTS_FILE)
|
||
|
|
{
|
||
|
|
let _ = writeln!(file,
|
||
|
|
"anti_alias_width={:.2} feather={:.2}\n\
|
||
|
|
avg_mae={:.4} samples={} combos={}",
|
||
|
|
baa, bf, best_avg_mae, samples.len(), total_combos);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn npix() -> usize { (CANVAS * CANVAS) as usize }
|
||
|
|
|
||
|
|
fn parse_filename(name: &str) -> Option<(String, f32, f32, [u8; 4])> {
|
||
|
|
// st_{position}_sz{size}_op{opacity}_{color}
|
||
|
|
let parts: Vec<&str> = name.split('_').collect();
|
||
|
|
if parts.len() < 4 || parts[0] != "st" { return None; }
|
||
|
|
let position = parts[1].to_string();
|
||
|
|
let size = parts[2].strip_prefix("sz")?.parse::<f32>().ok()?;
|
||
|
|
let opacity = parts[3].strip_prefix("op")?.parse::<f32>().ok()? / 100.0;
|
||
|
|
let color = color_from_name(parts[4]);
|
||
|
|
Some((position, size, opacity, color))
|
||
|
|
}
|
||
|
|
|
||
|
|
fn color_from_name(name: &str) -> [u8; 4] {
|
||
|
|
match name {
|
||
|
|
"red" => [220, 30, 30, 255],
|
||
|
|
"green" => [30, 180, 30, 255],
|
||
|
|
"blue" => [30, 60, 220, 255],
|
||
|
|
"white" => [220, 220, 220, 255],
|
||
|
|
"yellow" => [255, 220, 30, 255],
|
||
|
|
"cyan" => [30, 220, 220, 255],
|
||
|
|
"magenta" => [255, 30, 180, 255],
|
||
|
|
_ => [220, 30, 30, 255],
|
||
|
|
}
|
||
|
|
}
|