235 lines
9.1 KiB
Rust
235 lines
9.1 KiB
Rust
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/// Grid-search Bevel & Emboss MAE tuning against Krita ground-truth PNGs.
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///
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/// Expects `_tmp/bevel_emboss_png_kra_set/` with transparent PNGs exported
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/// from `_tmp/bevel_emboss_kra_set/`.
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use std::io::Write;
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const GT_DIR: &str = "_tmp/bevel_emboss_png_kra_set";
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static mut CANVAS: u32 = 800;
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const RESULTS_FILE: &str = "bevel_emboss_kra_grid_results.txt";
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struct Sample {
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_name: String,
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depth: f32,
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size: f32,
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soften: f32,
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angle: f32,
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direction: String,
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ref_pixels: Vec<u8>,
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content_mask: Vec<bool>,
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}
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fn main() {
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let entries: Vec<_> = std::fs::read_dir(GT_DIR)
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.unwrap_or_else(|e| panic!("cannot read {}: {}", GT_DIR, e))
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.filter_map(|e| e.ok())
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.filter(|e| {
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let s = e.file_name();
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let s = s.to_string_lossy();
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s.starts_with("be_") && s.ends_with(".png")
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})
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.collect();
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println!("Found {} PNGs in {}", entries.len(), GT_DIR);
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let mut samples: Vec<Sample> = Vec::new();
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for entry in &entries {
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let path = entry.path();
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let stem = path.file_stem().unwrap().to_string_lossy().to_string();
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let params = match parse_filename(&stem) {
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Some(p) => p,
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None => { eprintln!(" SKIP: {}", stem); continue; }
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};
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let (size, soften, depth, angle, direction) = params;
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let img = match image::open(&path) {
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Ok(i) => i,
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Err(e) => { eprintln!(" SKIP {}: {}", stem, e); continue; }
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};
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let rgba = img.to_rgba8();
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let (src_w, src_h) = rgba.dimensions();
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if src_w != src_h {
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eprintln!(" SKIP {}: non-square dimensions {}x{}", stem, src_w, src_h);
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continue;
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}
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unsafe {
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CANVAS = src_w;
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}
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let src_raw = rgba.as_raw();
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let mut cropped_raw = vec![0u8; unsafe { (CANVAS * CANVAS * 4) as usize }];
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cropped_raw.copy_from_slice(src_raw);
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let npix = unsafe { (CANVAS * CANVAS) as usize };
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let mut content_mask = vec![false; npix];
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for i in 0..npix {
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content_mask[i] = cropped_raw[i * 4 + 3] > 0;
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}
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samples.push(Sample {
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_name: stem,
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depth, size, soften, angle, direction,
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ref_pixels: cropped_raw,
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content_mask,
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});
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}
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println!("Loaded {} samples", samples.len());
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if samples.is_empty() {
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eprintln!("No valid samples found.");
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std::process::exit(1);
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}
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let content_count = samples[0].content_mask.iter().filter(|&&b| b).count();
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println!("Content pixels per image: {} / {} ({:.1}%)",
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content_count, npix(), content_count as f64 / npix() as f64 * 100.0);
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let rect_alpha: Vec<u8> = {
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let n = npix();
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let mut a = vec![0u8; n];
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for i in 0..n {
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a[i] = samples[0].ref_pixels[i * 4 + 3];
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}
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a
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};
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let lighting_blurs: &[i32] = &[0, 1, 2, 3, 5];
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let hl_scales: &[f32] = &[0.3, 0.5, 0.75, 1.0, 1.5, 2.0];
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let sh_scales: &[f32] = &[0.3, 0.5, 0.75, 1.0, 1.5, 2.0];
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let profile_exponents: &[f32] = &[0.3, 0.5, 0.7, 1.0, 1.5, 2.0, 3.0];
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let total_combos = profile_exponents.len() * lighting_blurs.len() * hl_scales.len() * sh_scales.len();
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println!("Grid: {} combos x {} samples = {} evals", total_combos, samples.len(), total_combos * samples.len());
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std::io::stdout().flush().ok();
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let mut best_avg_mae = f64::MAX;
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let mut best_params = (0i32, 0.0f32, 0.0f32, 1.0f32);
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let mut eval_count = 0usize;
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for &profile_exp in profile_exponents {
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for &lighting_blur in lighting_blurs {
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for &hl_scale in hl_scales {
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for &sh_scale in sh_scales {
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let mut total_mae = 0.0f64;
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for s in &samples {
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let style_enum = hcie_fx::types::BevelStyle::InnerBevel;
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let dir_enum = match s.direction.as_str() {
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"down" => hcie_fx::types::Direction::Down,
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_ => hcie_fx::types::Direction::Up,
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};
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let (highlight, shadow) = hcie_fx::tuned::generate_bevel_tuned(
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&rect_alpha, unsafe { CANVAS }, unsafe { CANVAS },
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s.depth, s.size, s.soften, s.angle, 30.0,
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&dir_enum, &hcie_fx::types::Technique::Smooth, &style_enum,
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lighting_blur, hl_scale, sh_scale, profile_exp,
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);
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let px = npix();
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let mut out = vec![0u8; px * 4];
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// Detect actual shape color from ground truth center pixel
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let c = unsafe { CANVAS };
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let center = ((c / 2) * c + (c / 2)) as usize;
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let shape_r = s.ref_pixels[center * 4];
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let shape_g = s.ref_pixels[center * 4 + 1];
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let shape_b = s.ref_pixels[center * 4 + 2];
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for i in 0..px {
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if rect_alpha[i] > 0 {
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out[i * 4] = shape_r;
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out[i * 4 + 1] = shape_g;
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out[i * 4 + 2] = shape_b;
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out[i * 4 + 3] = 255;
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}
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}
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// 2. Composite highlight (screen) and shadow (multiply) over the shape
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for i in 0..px {
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let sa = highlight[i * 4 + 3];
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if sa > 0 {
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let dst = [out[i * 4], out[i * 4 + 1], out[i * 4 + 2], out[i * 4 + 3]];
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let src = [highlight[i * 4], highlight[i * 4 + 1], highlight[i * 4 + 2], sa];
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let blended = hcie_blend::blend_pixels(dst, src, hcie_blend::BlendMode::Screen, 1.0);
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out[i * 4..i * 4 + 4].copy_from_slice(&blended);
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}
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}
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for i in 0..px {
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let sa = shadow[i * 4 + 3];
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if sa > 0 {
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let dst = [out[i * 4], out[i * 4 + 1], out[i * 4 + 2], out[i * 4 + 3]];
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let src = [shadow[i * 4], shadow[i * 4 + 1], shadow[i * 4 + 2], sa];
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let blended = hcie_blend::blend_pixels(dst, src, hcie_blend::BlendMode::Multiply, 1.0);
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out[i * 4..i * 4 + 4].copy_from_slice(&blended);
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}
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}
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let mut diff_sum = 0.0f64;
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let mut content_pixels = 0u64;
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for i in 0..px {
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if !s.content_mask[i] { continue; }
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content_pixels += 1;
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for c in 0..4 {
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diff_sum += (out[i * 4 + c] as i32 - s.ref_pixels[i * 4 + c] as i32).abs() as f64;
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}
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}
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if content_pixels > 0 {
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total_mae += diff_sum / content_pixels as f64 / 4.0;
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}
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}
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eval_count += 1;
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let avg_mae = total_mae / samples.len() as f64;
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if avg_mae < best_avg_mae {
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best_avg_mae = avg_mae;
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best_params = (lighting_blur, hl_scale, sh_scale, profile_exp);
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println!("*** [{}/{}] NEW BEST avg MAE = {:.4} (lb={}, hl={:.2}, sh={:.2}, pe={:.2})",
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eval_count, total_combos, best_avg_mae, lighting_blur, hl_scale, sh_scale, profile_exp);
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std::io::stdout().flush().ok();
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} else if eval_count % 100 == 0 {
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println!(" [{}/{}] avg={:.4} best={:.4}", eval_count, total_combos, avg_mae, best_avg_mae);
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std::io::stdout().flush().ok();
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}
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}
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}
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}
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}
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let (lb, hl, sh, pe) = best_params;
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println!("\n=== RESULT ===");
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println!("Best avg MAE = {:.4}", best_avg_mae);
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println!(" lighting_blur = {}", lb);
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println!(" hl_scale = {:.2}", hl);
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println!(" sh_scale = {:.2}", sh);
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println!(" profile_exp = {:.2}", pe);
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if let Ok(mut file) = std::fs::OpenOptions::new()
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.create(true).write(true).truncate(true).open(RESULTS_FILE)
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{
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let _ = writeln!(file,
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"lighting_blur={} hl_scale={:.2} sh_scale={:.2} profile_exp={:.2}\n\
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avg_mae={:.4} samples={} combos={}",
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lb, hl, sh, pe, best_avg_mae, samples.len(), total_combos);
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}
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}
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fn npix() -> usize { unsafe { (CANVAS * CANVAS) as usize } }
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fn parse_filename(name: &str) -> Option<(f32, f32, f32, f32, String)> {
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// be_s{size}_sf{soften}_d{depth}_a{angle}_{dir_name}
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let parts: Vec<&str> = name.split('_').collect();
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if parts.len() < 6 || parts[0] != "be" { return None; }
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let size = parts[1].strip_prefix('s')?.parse::<f32>().ok()?;
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let soften = parts[2].strip_prefix("sf")?.parse::<f32>().ok()?;
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let depth = parts[3].strip_prefix('d')?.parse::<f32>().ok()?;
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let angle = parts[4].strip_prefix('a')?.parse::<f32>().ok()?;
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let direction = parts[5].to_string();
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Some((size, soften, depth, angle, direction))
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}
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