(palette: &mut PalF, attr: &Attributes, hist: &mut HistogramInternal, max_mse: Option<f64>, palette_error: &mut Option<f64>)
| 426 | |
| 427 | |
| 428 | fn refine_palette(palette: &mut PalF, attr: &Attributes, hist: &mut HistogramInternal, max_mse: Option<f64>, palette_error: &mut Option<f64>) -> Result<(), Error> { |
| 429 | let (iterations, iteration_limit) = attr.kmeans_iterations(hist.items.len(), palette_error.is_some()); |
| 430 | if iterations > 0 { |
| 431 | attr.verbose_print(" moving colormap towards local minimum"); |
| 432 | let mut i = 0; |
| 433 | while i < iterations { |
| 434 | let stage_done = f32::from(i) / f32::from(iterations); |
| 435 | let overall_done = (stage_done * f32::from(attr.progress_stage3)).mul_add(0.89, f32::from(attr.progress_stage1) + f32::from(attr.progress_stage2)); |
| 436 | if attr.progress(overall_done) { |
| 437 | break; |
| 438 | } |
| 439 | |
| 440 | let pal_err = Kmeans::iteration(hist, palette, false)?; |
| 441 | debug_assert!(pal_err < 1e20); |
| 442 | let previous_palette_error = *palette_error; |
| 443 | *palette_error = Some(pal_err); |
| 444 | |
| 445 | if let Some(previous_palette_error) = previous_palette_error { |
| 446 | if (previous_palette_error - pal_err).abs() < iteration_limit { |
| 447 | break; |
| 448 | } |
| 449 | } |
| 450 | i += if pal_err > max_mse.unwrap_or(1e20) * 1.5 { 2 } else { 1 }; |
| 451 | } |
| 452 | } |
| 453 | Ok(()) |
| 454 | } |
| 455 | |
| 456 | #[cold] |
| 457 | fn palette_from_histogram(hist: &HistogramInternal, max_colors: PalLen) -> (PalF, Option<f64>) { |
no test coverage detected