266 lines
10 KiB
Rust
266 lines
10 KiB
Rust
#![allow(dead_code, unused_imports, unused_variables, unused_macros)]
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/// Grid-search inner glow MAE tuning against Krita ground-truth PNGs.
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///
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/// Expects `_tmp/inner_glow_png_kra_set/` with transparent PNGs exported
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/// from `_tmp/inner_glow_kra_set/`.
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use std::io::Write;
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const GT_DIR: &str = "_tmp/inner_glow_png_kra_set";
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static mut CANVAS: u32 = 800;
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const RESULTS_FILE: &str = "inner_glow_kra_grid_results.txt";
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struct Sample {
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name: String,
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choke: f32,
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size: f32,
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opacity: f32,
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noise: f32,
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color: [u8; 4],
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blend_mode: 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("ig_sp") && 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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let mut skipped_noise = 0;
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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 (choke, size, opacity, noise, blend, color) = params;
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if noise > 0.0 {
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skipped_noise += 1;
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continue;
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}
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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 shape_mask = vec![false; npix];
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for i in 0..npix {
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let is_bg = cropped_raw[i * 4] == 128 && cropped_raw[i * 4 + 1] == 128 && cropped_raw[i * 4 + 2] == 128;
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if !is_bg {
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shape_mask[i] = true;
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}
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}
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let mut content_mask = vec![false; npix];
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for i in 0..npix {
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// Glow is inside the shape (shape_mask is true) and differs from pure magenta.
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let is_pure_shape = cropped_raw[i * 4] == 255 && cropped_raw[i * 4 + 1] == 0 && cropped_raw[i * 4 + 2] == 252;
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content_mask[i] = shape_mask[i] && !is_pure_shape;
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}
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samples.push(Sample {
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name: stem,
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choke, size, opacity, noise, color, blend_mode: blend,
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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 (skipped {} with noise>0)", samples.len(), skipped_noise);
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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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let is_bg = samples[0].ref_pixels[i * 4] == 128 && samples[0].ref_pixels[i * 4 + 1] == 128 && samples[0].ref_pixels[i * 4 + 2] == 128;
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if !is_bg {
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a[i] = 255;
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}
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}
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a
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};
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let blur_factors: &[f32] = &[1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0];
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let passes_list: &[i32] = &[1, 2, 3, 4, 5];
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let alpha_scales: &[f32] = &[0.0, 0.25, 0.5, 0.75, 1.0];
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let glow_boosts: &[f32] = &[0.5, 0.75, 1.0, 1.25, 1.5, 2.0];
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let spread_positions: &[bool] = &[false, true]; // false = after blur, true = before blur
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let total_combos = blur_factors.len() * passes_list.len() * alpha_scales.len()
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* glow_boosts.len() * spread_positions.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 = (0.0f32, 0i32, 0.0f32, 0.0f32, false);
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let mut eval_count = 0usize;
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for &blur_factor in blur_factors {
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for &passes in passes_list {
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for &alpha_scale in alpha_scales {
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for &glow_boost in glow_boosts {
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for &spread_before_blur in spread_positions {
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let mut total_mae = 0.0f64;
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for s in &samples {
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let glow = hcie_fx::tuned::generate_glow_tuned(
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&rect_alpha, unsafe { CANVAS }, unsafe { CANVAS },
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s.choke, s.size, s.color, true,
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blur_factor, passes, alpha_scale, glow_boost, spread_before_blur,
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);
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let blend = blend_mode_from_name(&s.blend_mode);
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let px = npix();
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// Start with 50% gray background
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let mut out = vec![128u8; px * 4];
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for i in 0..px {
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out[i * 4 + 3] = 255;
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}
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// 1. Composite magenta shape on top using Normal blend
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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] = 255;
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out[i * 4 + 1] = 0;
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out[i * 4 + 2] = 252;
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out[i * 4 + 3] = 255;
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}
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}
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// 2. Composite inner glow over the shape using actual blend mode
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for i in 0..px {
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let sa = glow[i * 4 + 3];
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if sa == 0 { continue; }
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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 = [glow[i * 4], glow[i * 4 + 1], glow[i * 4 + 2], sa];
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let blended = hcie_blend::blend_pixels(dst, src, blend, s.opacity);
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out[i * 4..i * 4 + 4].copy_from_slice(&blended);
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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 = (blur_factor, passes, alpha_scale, glow_boost, spread_before_blur);
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println!("*** [{}/{}] NEW BEST avg MAE = {:.4} (bf={:.1}, p={}, as={:.2}, gb={:.2}, spb={})",
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eval_count, total_combos, best_avg_mae, blur_factor, passes, alpha_scale, glow_boost, spread_before_blur);
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std::io::stdout().flush().ok();
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} else if eval_count % 500 == 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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}
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let (bbf, bp, bas, bgb, bspb) = 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!(" blur_factor = {:.1}", bbf);
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println!(" passes = {}", bp);
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println!(" alpha_scale = {:.2}", bas);
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println!(" glow_boost = {:.2}", bgb);
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println!(" spread_before_blur= {}", bspb);
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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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"blur_factor={:.1} passes={} alpha_scale={:.2} glow_boost={:.2} spread_before_blur={}\n\
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avg_mae={:.4} samples={} combos={}",
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bbf, bp, bas, bgb, bspb, 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, [u8; 4])> {
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// ig_sp{choke}_s{size}_op{opacity}_n{noise}_{blend}_{color}
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let parts: Vec<&str> = name.split('_').collect();
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if parts.len() < 7 || parts[0] != "ig" { return None; }
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let choke = parts[1].strip_prefix("sp")?.parse::<f32>().ok()?;
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let size = parts[2].strip_prefix('s')?.parse::<f32>().ok()?;
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let opacity = parts[3].strip_prefix("op")?.parse::<f32>().ok()? / 100.0;
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let noise = parts[4].strip_prefix('n')?.parse::<f32>().ok()?;
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let blend = parts[5].to_string();
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let color = color_from_name(parts[6]);
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Some((choke, size, opacity, noise, blend, color))
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}
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fn color_from_name(name: &str) -> [u8; 4] {
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match name {
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"red" => [220, 30, 30, 255],
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"green" => [30, 180, 30, 255],
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"blue" => [30, 60, 220, 255],
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"white" => [220, 220, 220, 255],
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"yellow" => [255, 220, 30, 255],
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"cyan" => [30, 220, 220, 255],
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"magenta" => [255, 30, 180, 255],
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_ => [220, 30, 30, 255],
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}
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}
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fn blend_mode_from_name(name: &str) -> hcie_blend::BlendMode {
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match name {
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"multiply" => hcie_blend::BlendMode::Multiply,
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"screen" => hcie_blend::BlendMode::Screen,
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"normal" => hcie_blend::BlendMode::Normal,
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_ => hcie_blend::BlendMode::Normal,
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}
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}
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