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pub use coord_2d::{Coord, Size}; use grid_2d::Grid; use image::{DynamicImage, Rgba, RgbaImage}; use rand::{Rng, SeedableRng}; use std::num::NonZeroU32; use wfc::orientation::OrientationTable; pub use wfc::orientation::{self, Orientation}; use wfc::overlapping::{OverlappingPatterns, Pattern}; use wfc::retry as wfc_retry; pub use wfc::wrap; pub use wfc::ForbidNothing; use wfc::*; pub use wrap::WrapXY; pub mod retry { #[cfg(feature = "parallel")] pub use super::wfc_retry::ParNumTimes; pub use super::wfc_retry::RetryOwn as Retry; pub use super::wfc_retry::{Forever, NumTimes}; pub trait ImageRetry: Retry { type ImageReturn; #[doc(hidden)] fn image_return( r: Self::Return, image_patterns: &super::ImagePatterns, ) -> Self::ImageReturn; } } pub struct ImagePatterns { overlapping_patterns: OverlappingPatterns<Rgba<u8>>, empty_colour: Rgba<u8>, } impl ImagePatterns { pub fn new( image: &DynamicImage, pattern_size: NonZeroU32, orientations: &[Orientation], ) -> Self { let rgba_image = image.to_rgba8(); let size = Size::new(rgba_image.width(), rgba_image.height()); let grid = Grid::new_fn(size, |Coord { x, y }| { *rgba_image.get_pixel(x as u32, y as u32) }); let overlapping_patterns = OverlappingPatterns::new(grid, pattern_size, orientations); Self { overlapping_patterns, empty_colour: Rgba([0, 0, 0, 0]), } } pub fn set_empty_colour(&mut self, empty_colour: Rgba<u8>) { self.empty_colour = empty_colour; } pub fn image_from_wave(&self, wave: &Wave) -> DynamicImage { let size = wave.grid().size(); let mut rgba_image = RgbaImage::new(size.width(), size.height()); wave.grid().enumerate().for_each(|(Coord { x, y }, cell)| { let colour = match cell.chosen_pattern_id() { Ok(pattern_id) => { *self.overlapping_patterns.pattern_top_left_value(pattern_id) } Err(_) => self.empty_colour, }; rgba_image.put_pixel(x as u32, y as u32, colour); }); DynamicImage::ImageRgba8(rgba_image) } pub fn weighted_average_colour<'a>(&self, cell: &'a WaveCellRef<'a>) -> Rgba<u8> { use wfc::EnumerateCompatiblePatternWeights::*; match cell.enumerate_compatible_pattern_weights() { MultipleCompatiblePatternsWithoutWeights | NoCompatiblePattern => { self.empty_colour } SingleCompatiblePatternWithoutWeight(pattern_id) => { *self.overlapping_patterns.pattern_top_left_value(pattern_id) } CompatiblePatternsWithWeights(iter) => { let (r, g, b, a) = iter .map(|(pattern_id, weight)| { let &Rgba([r, g, b, a]) = self.overlapping_patterns.pattern_top_left_value(pattern_id); ( r as u32 * weight, g as u32 * weight, b as u32 * weight, a as u32 * weight, ) }) .fold( (0, 0, 0, 0), |(acc_r, acc_g, acc_b, acc_a), (r, g, b, a)| { (acc_r + r, acc_g + g, acc_b + b, acc_a + a) }, ); let total_weight = cell.sum_compatible_pattern_weight(); Rgba([ (r / total_weight) as u8, (g / total_weight) as u8, (b / total_weight) as u8, (a / total_weight) as u8, ]) } } } pub fn grid(&self) -> &Grid<Rgba<u8>> { self.overlapping_patterns.grid() } pub fn id_grid(&self) -> Grid<OrientationTable<PatternId>> { self.overlapping_patterns.id_grid() } pub fn id_grid_original_orientation(&self) -> Grid<PatternId> { self.overlapping_patterns.id_grid_original_orientation() } pub fn pattern(&self, pattern_id: PatternId) -> &Pattern { self.overlapping_patterns.pattern(pattern_id) } pub fn pattern_mut(&mut self, pattern_id: PatternId) -> &mut Pattern { self.overlapping_patterns.pattern_mut(pattern_id) } pub fn global_stats(&self) -> GlobalStats { self.overlapping_patterns.global_stats() } pub fn collapse_wave_retrying<W, F, RT, R>( &self, output_size: Size, wrap: W, forbid: F, retry: RT, rng: &mut R, ) -> RT::Return where W: Wrap, F: ForbidPattern + Send + Sync + Clone, RT: retry::Retry, R: Rng + Send + Sync + Clone, { let global_stats = self.global_stats(); let run = RunOwn::new_wrap_forbid(output_size, &global_stats, wrap, forbid, rng); run.collapse_retrying(retry, rng) } } impl retry::ImageRetry for retry::Forever { type ImageReturn = DynamicImage; fn image_return( r: Self::Return, image_patterns: &ImagePatterns, ) -> Self::ImageReturn { image_patterns.image_from_wave(&r) } } impl retry::ImageRetry for retry::NumTimes { type ImageReturn = Result<DynamicImage, PropagateError>; fn image_return( r: Self::Return, image_patterns: &ImagePatterns, ) -> Self::ImageReturn { match r { Ok(r) => Ok(image_patterns.image_from_wave(&r)), Err(e) => Err(e), } } } #[cfg(feature = "parallel")] impl retry::ImageRetry for retry::ParNumTimes { type ImageReturn = Result<DynamicImage, PropagateError>; fn image_return( r: Self::Return, image_patterns: &ImagePatterns, ) -> Self::ImageReturn { match r { Ok(r) => Ok(image_patterns.image_from_wave(&r)), Err(e) => Err(e), } } } pub fn generate_image_with_rng<W, F, IR, R>( image: &DynamicImage, pattern_size: NonZeroU32, output_size: Size, orientations: &[Orientation], wrap: W, forbid: F, retry: IR, rng: &mut R, ) -> IR::ImageReturn where W: Wrap, F: ForbidPattern + Send + Sync + Clone, IR: retry::ImageRetry, R: Rng + Send + Sync + Clone, { let image_patterns = ImagePatterns::new(image, pattern_size, orientations); IR::image_return( image_patterns.collapse_wave_retrying(output_size, wrap, forbid, retry, rng), &image_patterns, ) } pub fn generate_image<W, F, IR>( image: &DynamicImage, pattern_size: NonZeroU32, output_size: Size, orientations: &[Orientation], wrap: W, forbid: F, retry: IR, ) -> IR::ImageReturn where W: Wrap, F: ForbidPattern + Send + Sync + Clone, IR: retry::ImageRetry, { generate_image_with_rng( image, pattern_size, output_size, orientations, wrap, forbid, retry, &mut rand::rngs::StdRng::from_entropy(), ) }