1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
//! `texture-synthesis` is a light API for Multiresolution Stochastic Texture Synthesis, //! a non-parametric example-based algorithm for image generation. //! //! First, you build a `Session` via a `SessionBuilder`, which follows the builder pattern. Calling //! `build` on the SessionBuilder loads all of the input images and checks for various errors. //! //! `Session` has a `run()` method that takes all of the parameters and inputs added in the session //! builder to generated an image, which is returned as a `GeneratedImage`. //! //! You can save, stream, or inspect the image from `GeneratedImage`. //! //! ## Features //! //! 1. Single example generation //! 2. Multi example generation //! 3. Guided synthesis //! 4. Style transfer //! 5. Inpainting //! 6. Tiling textures //! //! Please, refer to the examples folder in the [repository](https://github.com/EmbarkStudios/texture-synthesis) for the features usage examples. //! //! ## Usage //! Session follows a "builder pattern" for defining parameters, meaning you chain functions together. //! //! ```no_run //! // Create a new session with default parameters //! let session = texture_synthesis::Session::builder() //! // Set some parameters //! .seed(10) //! .nearest_neighbors(20) //! // Specify example images //! .add_example(&"imgs/1.jpg") //! // Build the session //! .build().expect("failed to build session"); //! //! // Generate a new image //! let generated_img = session.run(None); //! //! // Save the generated image to disk //! generated_img.save("my_generated_img.jpg").expect("failed to save generated image"); //! ``` mod errors; mod img_pyramid; use img_pyramid::*; mod utils; use utils::*; mod multires_stochastic_texture_synthesis; use multires_stochastic_texture_synthesis::*; use std::path::Path; mod unsync; pub use image; pub use utils::ImageSource; pub use errors::Error; #[derive(Copy, Clone)] pub struct Dims { pub width: u32, pub height: u32, } impl Dims { pub fn square(size: u32) -> Self { Self { width: size, height: size, } } pub fn new(width: u32, height: u32) -> Self { Self { width, height } } } struct Parameters { tiling_mode: bool, nearest_neighbors: u32, random_sample_locations: u64, cauchy_dispersion: f32, backtrack_percent: f32, backtrack_stages: u32, resize_input: Option<Dims>, output_size: Dims, guide_alpha: f32, random_resolve: Option<u64>, max_thread_count: Option<usize>, seed: u64, } impl Default for Parameters { fn default() -> Self { Self { tiling_mode: false, nearest_neighbors: 50, random_sample_locations: 50, cauchy_dispersion: 1.0, backtrack_percent: 0.5, backtrack_stages: 5, resize_input: None, output_size: Dims::square(500), guide_alpha: 0.8, random_resolve: None, max_thread_count: None, seed: 0, } } } impl Parameters { fn to_generator_params(&self) -> GeneratorParams { GeneratorParams { nearest_neighbors: self.nearest_neighbors, random_sample_locations: self.random_sample_locations, cauchy_dispersion: self.cauchy_dispersion, p: self.backtrack_percent, p_stages: self.backtrack_stages as i32, seed: self.seed, alpha: self.guide_alpha, max_thread_count: self.max_thread_count.unwrap_or_else(num_cpus::get), tiling_mode: self.tiling_mode, } } } /// An image generated by a `Session::run()` pub struct GeneratedImage { inner: multires_stochastic_texture_synthesis::Generator, } impl GeneratedImage { /// Saves the generated image to the specified path pub fn save<P: AsRef<Path>>(&self, path: P) -> Result<(), Error> { let path = path.as_ref(); if let Some(parent_path) = path.parent() { std::fs::create_dir_all(&parent_path)?; } self.inner.color_map.as_ref().save(&path)?; Ok(()) } /// Writes the generated image to the specified stream pub fn write<W: std::io::Write>( self, writer: &mut W, fmt: image::ImageOutputFormat, ) -> Result<(), Error> { let dyn_img = self.into_image(); Ok(dyn_img.write_to(writer, fmt)?) } /// Saves debug information such as copied patches ids, map ids (if you have multi example generation) /// and a map indicating generated pixels the generator was "uncertain" of. pub fn save_debug<P: AsRef<Path>>(&self, dir: P) -> Result<(), Error> { let dir = dir.as_ref(); std::fs::create_dir_all(&dir)?; self.inner .get_uncertainty_map() .save(&dir.join("uncertainty.png"))?; let id_maps = self.inner.get_id_maps(); id_maps[0].save(&dir.join("patch_id.png"))?; id_maps[1].save(&dir.join("map_id.png"))?; Ok(()) } /// Returns the generated output image pub fn into_image(self) -> image::DynamicImage { image::DynamicImage::ImageRgba8(self.inner.color_map.into_inner()) } } impl AsRef<image::RgbaImage> for GeneratedImage { fn as_ref(&self) -> &image::RgbaImage { self.inner.color_map.as_ref() } } /// Method used for sampling an example image. pub enum SampleMethod<'a> { /// All pixels in the example image can be sampled. All, /// No pixels in the example image will be sampled. Ignore, /// Pixels are selectively sampled based on an image. Image(ImageSource<'a>), } impl<'a> SampleMethod<'a> { #[inline] fn is_ignore(&self) -> bool { match self { Self::Ignore => true, _ => false, } } } impl<'a, IS> From<IS> for SampleMethod<'a> where IS: Into<ImageSource<'a>>, { fn from(is: IS) -> Self { SampleMethod::Image(is.into()) } } /// Internal sample method pub enum SamplingMethod { All, Ignore, Image(image::RgbaImage), } impl SamplingMethod { #[inline] fn is_ignore(&self) -> bool { match self { Self::Ignore => true, _ => false, } } } /// A builder for an `Example` pub struct ExampleBuilder<'a> { img: ImageSource<'a>, guide: Option<ImageSource<'a>>, sample_method: SampleMethod<'a>, } impl<'a> ExampleBuilder<'a> { /// Creates a new example builder from the specified image source pub fn new<I: Into<ImageSource<'a>>>(img: I) -> Self { Self { img: img.into(), guide: None, sample_method: SampleMethod::All, } } /// Use a guide map that describe a 'FROM' transformation. /// /// Note: If any one example has a guide, then they **all** must have /// a guide, otherwise a session will not be created. pub fn with_guide<G: Into<ImageSource<'a>>>(mut self, guide: G) -> Self { self.guide = Some(guide.into()); self } /// Specify how the example image is sampled during texture generation. /// /// By default, all pixels in the example can be sampled. pub fn set_sample_method<M: Into<SampleMethod<'a>>>(mut self, method: M) -> Self { self.sample_method = method.into(); self } } impl<'a> Into<Example<'a>> for ExampleBuilder<'a> { fn into(self) -> Example<'a> { Example { img: self.img, guide: self.guide, sample_method: self.sample_method, } } } /// An example to be used in texture generation pub struct Example<'a> { img: ImageSource<'a>, guide: Option<ImageSource<'a>>, sample_method: SampleMethod<'a>, } impl<'a> Example<'a> { /// Creates a new example builder from the specified image source pub fn builder<I: Into<ImageSource<'a>>>(img: I) -> ExampleBuilder<'a> { ExampleBuilder::new(img) } /// Creates a new example input from the specified image source pub fn new<I: Into<ImageSource<'a>>>(img: I) -> Self { Self { img: img.into(), guide: None, sample_method: SampleMethod::All, } } /// Use a guide map that describe a 'FROM' transformation. /// /// Note: If any one example has a guide, then they **all** must have /// a guide, otherwise a session will not be created. pub fn with_guide<G: Into<ImageSource<'a>>>(&mut self, guide: G) -> &mut Self { self.guide = Some(guide.into()); self } /// Specify how the example image is sampled during texture generation. /// /// By default, all pixels in the example can be sampled. pub fn set_sample_method<M: Into<SampleMethod<'a>>>(&mut self, method: M) -> &mut Self { self.sample_method = method.into(); self } fn resolve( self, backtracks: u32, resize: Option<Dims>, target_guide: &Option<ImagePyramid>, ) -> Result<ResolvedExample, Error> { let image = ImagePyramid::new(load_image(self.img, resize)?, Some(backtracks)); let guide = match target_guide { Some(tg) => { Some(match self.guide { Some(exguide) => { let exguide = load_image(exguide, resize)?; ImagePyramid::new(exguide, Some(backtracks)) } None => { // if we do not have an example guide, create it as a b/w maps of the example let mut gm = transform_to_guide_map(image.bottom().clone(), resize, 2.0); match_histograms(&mut gm, tg.bottom()); ImagePyramid::new(gm, Some(backtracks)) } }) } None => None, }; let method = match self.sample_method { SampleMethod::All => SamplingMethod::All, SampleMethod::Ignore => SamplingMethod::Ignore, SampleMethod::Image(src) => { let img = load_image(src, resize)?; SamplingMethod::Image(img) } }; Ok(ResolvedExample { image, guide, method, }) } } impl<'a, IS> From<IS> for Example<'a> where IS: Into<ImageSource<'a>>, { fn from(is: IS) -> Self { Example::new(is) } } /// Builds a session by setting parameters and adding input images, calling /// `build` will check all of the provided inputs to verify that texture /// synthesis will provide valid output #[derive(Default)] pub struct SessionBuilder<'a> { examples: Vec<Example<'a>>, target_guide: Option<ImageSource<'a>>, inpaint_mask: Option<(ImageSource<'a>, usize, Dims)>, params: Parameters, } impl<'a> SessionBuilder<'a> { /// Creates a new `SessionBuilder`, can also be created via `Session::builder()` pub fn new() -> Self { Self::default() } /// Adds an `Example` from which a generator will synthesize a new image. /// /// See [examples/01_single_example_synthesis](https://github.com/EmbarkStudios/texture-synthesis/tree/master/lib/examples/01_single_example_synthesis.rs) /// /// # Examples /// /// ```no_run /// let tex_synth = texture_synthesis::Session::builder() /// .add_example(&"imgs/1.jpg") /// .build().expect("failed to build session"); /// ``` pub fn add_example<E: Into<Example<'a>>>(mut self, example: E) -> Self { self.examples.push(example.into()); self } /// Adds Examples from which a generator will synthesize a new image. /// /// See [examples/02_multi_example_synthesis](https://github.com/EmbarkStudios/texture-synthesis/tree/master/lib/examples/02_multi_example_synthesis.rs) /// /// # Examples /// /// ```no_run /// let tex_synth = texture_synthesis::Session::builder() /// .add_examples(&[&"imgs/1.jpg", &"imgs/2.jpg"]) /// .build().expect("failed to build session"); /// ``` pub fn add_examples<E: Into<Example<'a>>, I: IntoIterator<Item = E>>( mut self, examples: I, ) -> Self { self.examples.extend(examples.into_iter().map(|e| e.into())); self } /// Inpaints an example. Due to how inpainting works, a size must also be provided, as /// all examples, as well as the inpaint mask, must be the same size as each other, as /// well as the final output image. Using `resize_input` or `output_size` is ignored /// if this method is called. /// /// To prevent sampling from the example, you can specify `SamplingMethod::Ignore` with `Example::set_sample_method`. /// /// See [examples/05_inpaint](https://github.com/EmbarkStudios/texture-synthesis/tree/master/lib/examples/05_inpaint.rs) /// /// # Examples /// /// ```no_run /// let tex_synth = texture_synthesis::Session::builder() /// .add_examples(&[&"imgs/1.jpg", &"imgs/3.jpg"]) /// .inpaint_example( /// &"masks/inpaint.jpg", /// // This will prevent sampling from the imgs/2.jpg, note that /// // we *MUST* provide at least one example to source from! /// texture_synthesis::Example::builder(&"imgs/2.jpg") /// .set_sample_method(texture_synthesis::SampleMethod::Ignore), /// texture_synthesis::Dims::square(400) /// ) /// .build().expect("failed to build session"); /// ``` pub fn inpaint_example<I: Into<ImageSource<'a>>, E: Into<Example<'a>>>( mut self, inpaint_mask: I, example: E, size: Dims, ) -> Self { self.inpaint_mask = Some((inpaint_mask.into(), self.examples.len(), size)); self.examples.push(example.into()); self } /// Loads a target guide map. /// /// If no `Example` guide maps are provided, this will produce a style transfer effect, /// where the Examples are styles and the target guide is content. /// /// See [examples/03_guided_synthesis](https://github.com/EmbarkStudios/texture-synthesis/tree/master/lib/examples/03_guided_synthesis.rs), /// or [examples/04_style_transfer](https://github.com/EmbarkStudios/texture-synthesis/tree/master/lib/examples/04_style_transfer.rs), pub fn load_target_guide<I: Into<ImageSource<'a>>>(mut self, guide: I) -> Self { self.target_guide = Some(guide.into()); self } /// Overwrite incoming images sizes pub fn resize_input(mut self, dims: Dims) -> Self { self.params.resize_input = Some(dims); self } /// Changes pseudo-deterministic seed. /// Global structures will stay same, if same seed is provided, but smaller details may change due to undeterministic nature of multithreading. pub fn seed(mut self, value: u64) -> Self { self.params.seed = value; self } /// Makes the generator output tiling image. /// Default: false. pub fn tiling_mode(mut self, is_tiling: bool) -> Self { self.params.tiling_mode = is_tiling; self } /// How many neighboring pixels each pixel is aware of during the generation (bigger number -> more global structures are captured). /// Default: 50 pub fn nearest_neighbors(mut self, count: u32) -> Self { self.params.nearest_neighbors = count; self } /// How many random locations will be considered during a pixel resolution apart from its immediate neighbors. /// If unsure, keep same as nearest neighbors. /// Default: 50 pub fn random_sample_locations(mut self, count: u64) -> Self { self.params.random_sample_locations = count; self } /// Make first X pixels to be randomly resolved and prevent them from being overwritten. /// Can be an enforcing factor of remixing multiple images together. pub fn random_init(mut self, count: u64) -> Self { self.params.random_resolve = Some(count); self } /// The distribution dispersion used for picking best candidate (controls the distribution 'tail flatness'). /// Values close to 0.0 will produce 'harsh' borders between generated 'chunks'. Values closer to 1.0 will produce a smoother gradient on those borders. /// For futher reading, check out P.Harrison's "Image Texture Tools". /// Default: 1.0 pub fn cauchy_dispersion(mut self, value: f32) -> Self { self.params.cauchy_dispersion = value; self } /// Controls the trade-off between guide and example map. /// If doing style transfer, set to about 0.8-0.6 to allow for more global structures of the style. /// If you'd like the guide maps to be considered through all generation stages, set to 1.0 (which would prevent guide maps weight "decay" during the score calculation). /// Default: 0.8 pub fn guide_alpha(mut self, value: f32) -> Self { self.params.guide_alpha = value; self } /// The percentage of pixels to be backtracked during each p_stage. Range (0,1). /// Default: 0.5 pub fn backtrack_percent(mut self, value: f32) -> Self { self.params.backtrack_percent = value; self } /// Controls the number of backtracking stages. Backtracking prevents 'garbage' generation. /// Right now, the depth of image pyramid for multiresolution synthesis /// depends on this parameter as well. /// Default: 5 pub fn backtrack_stages(mut self, stages: u32) -> Self { self.params.backtrack_stages = stages; self } /// Specify size of the generated image. /// Default: 500x500 pub fn output_size(mut self, dims: Dims) -> Self { self.params.output_size = dims; self } /// Specify the maximum number of threads that will be spawned /// at any one time in parallel. This number is allowed to exceed /// the number of logical cores on the system, but it should /// generally be kept at or below that number. /// /// Default: The number of logical cores on this system. pub fn max_thread_count(mut self, count: usize) -> Self { self.params.max_thread_count = Some(count); self } /// Creates a `Session`, or returns an error if invalid parameters or input /// images were specified. pub fn build(self) -> Result<Session, Error> { self.check_parameters_validity()?; self.check_images_validity()?; struct InpaintExample { inpaint_mask: image::RgbaImage, color_map: image::RgbaImage, example_index: usize, } let (inpaint, out_size, in_size) = match self.inpaint_mask { Some((src, ind, size)) => { let inpaint_mask = load_image(src, Some(size))?; let color_map = load_image(self.examples[ind].img.clone(), Some(size))?; ( Some(InpaintExample { inpaint_mask, color_map, example_index: ind, }), size, Some(size), ) } None => (None, self.params.output_size, self.params.resize_input), }; let target_guide = match self.target_guide { Some(tg) => { let tg_img = load_image(tg, Some(out_size))?; let num_guides = self.examples.iter().filter(|ex| ex.guide.is_some()).count(); let tg_img = if num_guides == 0 { transform_to_guide_map(tg_img, None, 2.0) } else { tg_img }; Some(ImagePyramid::new( tg_img, Some(self.params.backtrack_stages as u32), )) } None => None, }; let example_len = self.examples.len(); let mut examples = Vec::with_capacity(example_len); let mut guides = if target_guide.is_some() { Vec::with_capacity(example_len) } else { Vec::new() }; let mut methods = Vec::with_capacity(example_len); for example in self.examples { let resolved = example.resolve(self.params.backtrack_stages, in_size, &target_guide)?; examples.push(resolved.image); if let Some(guide) = resolved.guide { guides.push(guide); } methods.push(resolved.method); } // Initialize generator based on availability of an inpaint_mask. let generator = match inpaint { None => Generator::new(out_size), Some(inpaint) => Generator::new_from_inpaint( out_size, inpaint.inpaint_mask, inpaint.color_map, inpaint.example_index, ), }; let session = Session { examples, guides: target_guide.map(|tg| GuidesPyramidStruct { target_guide: tg, example_guides: guides, }), sampling_methods: methods, params: self.params, generator, }; Ok(session) } fn check_parameters_validity(&self) -> Result<(), Error> { if self.params.cauchy_dispersion < 0.0 || self.params.cauchy_dispersion > 1.0 { return Err(Error::InvalidRange(errors::InvalidRange { min: 0.0, max: 1.0, value: self.params.cauchy_dispersion, name: "cauchy_dispersion", })); } if self.params.backtrack_percent < 0.0 || self.params.backtrack_percent > 1.0 { return Err(Error::InvalidRange(errors::InvalidRange { min: 0.0, max: 1.0, value: self.params.backtrack_percent, name: "backtrack_percent", })); } if self.params.guide_alpha < 0.0 || self.params.guide_alpha > 1.0 { return Err(Error::InvalidRange(errors::InvalidRange { min: 0.0, max: 1.0, value: self.params.guide_alpha, name: "guide_alpha", })); } if let Some(max_count) = self.params.max_thread_count { if max_count == 0 { return Err(Error::InvalidRange(errors::InvalidRange { min: 1.0, max: 1024.0, value: max_count as f32, name: "max_thread_count", })); } } Ok(()) } fn check_images_validity(&self) -> Result<(), Error> { // We must have at least one example image to source pixels from let input_count = self .examples .iter() .filter(|ex| !ex.sample_method.is_ignore()) .count(); if input_count == 0 { return Err(Error::NoExamples); } // If we have more than one example guide, then *every* example // needs a guide let num_guides = self.examples.iter().filter(|ex| ex.guide.is_some()).count(); if num_guides != 0 && self.examples.len() != num_guides { return Err(Error::ExampleGuideMismatch( self.examples.len() as u32, num_guides as u32, )); } Ok(()) } } struct ResolvedExample { image: ImagePyramid, guide: Option<ImagePyramid>, method: SamplingMethod, } /// Texture synthesis session. /// /// Calling `run()` will generate a new image and return it, consuming the session in the /// process. You can provide a `GeneratorProgress` implementation to periodically get /// updates with the currently generated image and the number of pixels that /// have been resolved both in the current stage and globally /// /// # Example /// ```no_run /// let tex_synth = texture_synthesis::Session::builder() /// .seed(10) /// .tiling_mode(true) /// .add_example(&"imgs/1.jpg") /// .build().expect("failed to build session"); /// /// let generated_img = tex_synth.run(None); /// generated_img.save("my_generated_img.jpg").expect("failed to save image"); /// ``` pub struct Session { examples: Vec<ImagePyramid>, guides: Option<GuidesPyramidStruct>, sampling_methods: Vec<SamplingMethod>, generator: Generator, params: Parameters, } impl Session { /// Creates a new session with default parameters. pub fn builder<'a>() -> SessionBuilder<'a> { SessionBuilder::default() } /// Runs the generator and outputs a generated image. /// Now, only runs Multiresolution Stochastic Texture Synthesis. /// Might be interesting to include more algorithms in the future. pub fn run(mut self, progress: Option<Box<dyn GeneratorProgress>>) -> GeneratedImage { // random resolve // TODO: Instead of consuming the generator, we could instead make the // seed and random_resolve parameters, so that you could rerun the // generator with the same inputs if let Some(count) = self.params.random_resolve { let lvl = self.examples[0].pyramid.len(); let imgs: Vec<_> = self .examples .iter() .map(|a| ImageBuffer::from(&a.pyramid[lvl - 1])) //take the blurriest image .collect(); self.generator .resolve_random_batch(count as usize, &imgs, self.params.seed); } // run generator self.generator.main_resolve_loop( &self.params.to_generator_params(), &self.examples, progress, &self.guides, &self.sampling_methods, ); GeneratedImage { inner: self.generator, } } } /// Helper struct for passing progress information to external callers pub struct ProgressStat { /// The current amount of work that has been done pub current: usize, /// The total amount of work to do pub total: usize, } /// The current state of the image generator pub struct ProgressUpdate<'a> { /// The currenty resolved image pub image: &'a image::RgbaImage, /// The total progress for the final image pub total: ProgressStat, /// The progress for the current stage pub stage: ProgressStat, } /// Allows the generator to update external callers with the current /// progress of the image synthesis pub trait GeneratorProgress { fn update(&mut self, info: ProgressUpdate<'_>); } impl<G> GeneratorProgress for G where G: FnMut(ProgressUpdate<'_>) + Send, { fn update(&mut self, info: ProgressUpdate<'_>) { self(info) } }