.gitignore

@@ -1,7 +1,4 @@
 /target
-*.zip
-*.xz
-
 *.png
-!images/*
+!images/*.png
 fractal_settings.json

Cargo.lock

@@ -608,40 +608,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "crossbeam-channel"
-version = "0.5.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
-dependencies = [
- "cfg-if",
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
-dependencies = [
- "autocfg",
- "cfg-if",
- "crossbeam-utils",
- "memoffset 0.9.0",
- "scopeguard",
-]
-
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.16"
@@ -1271,7 +1237,6 @@ dependencies = [
  "image",
  "native-dialog",
  "rand",
- "rayon",
  "serde",
  "serde_json",
 ]
@@ -1378,15 +1343,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "memoffset"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -1549,16 +1505,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_cpus"
-version = "1.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
-dependencies = [
- "hermit-abi",
- "libc",
-]
-
 [[package]]
 name = "num_enum"
 version = "0.5.11"
@@ -1857,28 +1803,6 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2ff9a1f06a88b01621b7ae906ef0211290d1c8a168a15542486a8f61c0833b9"
 
-[[package]]
-name = "rayon"
-version = "1.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d2df5196e37bcc87abebc0053e20787d73847bb33134a69841207dd0a47f03b"
-dependencies = [
- "either",
- "rayon-core",
-]
-
-[[package]]
-name = "rayon-core"
-version = "1.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b8f95bd6966f5c87776639160a66bd8ab9895d9d4ab01ddba9fc60661aebe8d"
-dependencies = [
- "crossbeam-channel",
- "crossbeam-deque",
- "crossbeam-utils",
- "num_cpus",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.2.16"

Cargo.toml

@@ -10,7 +10,6 @@ eframe = "0.22.0"
 image = { version = "0.24.6", default-features = false, features = ["png"] }
 native-dialog = "0.6.4"
 rand = "0.8.5"
-rayon = "1.7.0"
 serde = { version = "1.0.171", features = ["derive"] }
 serde_json = "1.0.102"
 

Makefile

@@ -1,18 +0,0 @@
-APP_NAME=julia-fractal-renderer
-
-WIN_TARGET=x86_64-pc-windows-gnu
-RELEASE_W=target/$(WIN_TARGET)/release
-RELEASE_L=target/release
-
-release: release_windows release_linux
-
-release_linux:
-	cargo build --release
-	cd $(RELEASE_L) && tar -caf $(APP_NAME)-linux.tar.xz $(APP_NAME)
-	mv $(RELEASE_L)/$(APP_NAME)-linux.tar.xz .
-
-release_windows:
-	cargo build --release --target $(WIN_TARGET)
-	cd $(RELEASE_W) && zip -9 $(APP_NAME)-windows.zip $(APP_NAME).exe
-	mv $(RELEASE_W)/$(APP_NAME)-windows.zip .
-

src/generate.rs

@@ -1,14 +1,13 @@
 use eframe::epaint::Vec2;
 use image::{Rgb, RgbImage};
-use rayon::prelude::{IntoParallelIterator, ParallelIterator};
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Serialize, Deserialize)]
 pub struct RenderOptions {
-	pub width: usize,
+	pub width: u32,
-	pub height: usize,
+	pub height: u32,
 	pub unit_width: f64,
-	pub max_iter: u16,
+	pub iterations: u32,
 	pub cx: f64,
 	pub cy: f64,
 	pub fill_style: FillStyle,
@@ -26,7 +25,7 @@ impl Default for RenderOptions {
 			width: 512,
 			height: 512,
 			unit_width: 4.0,
-			max_iter: 128,
+			iterations: 128,
 			cx: 0.4,
 			cy: -0.2,
 			fill_style: FillStyle::Bright,
@@ -34,79 +33,57 @@ impl Default for RenderOptions {
 	}
 }
 
-pub fn render_c(q: &RenderOptions, mut image: RgbImage) -> RgbImage {
+pub fn view_point(q: &RenderOptions, image: RgbImage) -> RgbImage {
-	let width = q.width as f32;
+	apply_fn(image, q, |x, y| {
-	let height = q.height as f32;
+		let len = (Vec2::new(x as f32, y as f32) - Vec2::new(q.cx as f32, q.cy as f32)).length();
-	let ppu = width / (q.unit_width as f32);
-
-	let target = Vec2::new(q.cx as f32, q.cy as f32);
-
-	for y in 0..q.height {
-		for x in 0..q.width {
-			let sx = (x as f32 - width / 2.0) / ppu;
-			let sy = (y as f32 - height / 2.0) / ppu;
-
-			let len = (Vec2::new(sx, sy) - target).length();
 		if len < 0.03 {
-				image.put_pixel(x as u32, y as u32, Rgb([0, 120, 120]));
+			Some(Rgb([0, 120, 120]))
 		} else if len < 0.04 {
-				image.put_pixel(x as u32, y as u32, Rgb([255; 3]));
+			Some(Rgb([255; 3]))
+		} else {
+			None
 		}
-		}
+	})
-	}
-	image
 }
 
-pub fn color_iteration(iter: u16, color: (u8, u8, u8)) -> Rgb<u8> {
+pub fn render(q: &RenderOptions, color: (u8, u8, u8)) -> RgbImage {
-	let i = iter.min(255) as u8;
+	let img = RgbImage::new(q.width, q.height);
-	Rgb([
+	apply_fn(img, q, |x, y| {
+		let i = julia(x, y, q.cx, q.cy, q.iterations);
+		if q.fill_style == FillStyle::Black && i == q.iterations {
+			None
+		} else {
+			let i = i.min(255) as u8;
+			Some(Rgb([
 				i.saturating_mul(color.0),
 				i.saturating_mul(color.1),
 				i.saturating_mul(color.2),
-	])
+			]))
+		}
+	})
 }
 
-pub fn render_julia(q: &RenderOptions, color: (u8, u8, u8)) -> RgbImage {
+fn apply_fn<F>(mut image: RgbImage, q: &RenderOptions, op: F) -> RgbImage
-	let mut image = RgbImage::new(q.width as u32, q.height as u32);
+where
-
+	F: Fn(f64, f64) -> Option<Rgb<u8>>,
+{
 	let width = q.width as f64;
 	let height = q.height as f64;
 	let ppu = width / q.unit_width;
 
-	let fill = match q.fill_style {
+	for y in 0..q.height {
-		FillStyle::Black => Rgb([0; 3]),
-		FillStyle::Bright => color_iteration(q.max_iter, color),
-	};
-
-	(0..q.height)
-		.into_par_iter()
-		.map(|y| {
-			let mut row = Vec::with_capacity(q.width);
 		for x in 0..q.width {
 			let sx = (x as f64 - width / 2.0) / ppu;
 			let sy = (y as f64 - height / 2.0) / ppu;
-				let i = julia(sx, sy, q.cx, q.cy, q.max_iter);
+			if let Some(pixel) = op(sx, sy) {
-
+				image.put_pixel(x, y, pixel);
-				if i == q.max_iter {
-					row.push(fill);
-				} else {
-					row.push(color_iteration(i, color));
 			}
 		}
-			row
-		})
-		.collect::<Vec<_>>()
-		.into_iter()
-		.enumerate()
-		.for_each(|(y, row)| {
-			for (x, i) in row.into_iter().enumerate() {
-				image.put_pixel(x as u32, y as u32, i);
 	}
-		});
 	image
 }
 
-fn julia(mut x: f64, mut y: f64, cx: f64, cy: f64, max_iter: u16) -> u16 {
+fn julia(mut x: f64, mut y: f64, cx: f64, cy: f64, max_iter: u32) -> u32 {
 	let mut iter = 0;
 	while (x * x + y * y) < 4.0 && iter < max_iter {
 		(x, y) = (

src/main.rs

@@ -13,7 +13,7 @@ use eframe::{
 	epaint::{TextureHandle, Vec2},
 	Frame, NativeOptions,
 };
-use generate::{render_c, render_julia, FillStyle, RenderOptions};
+use generate::{render, view_point, FillStyle, RenderOptions};
 use image::EncodableLayout;
 use native_dialog::FileDialog;
 use serde::{Deserialize, Serialize};
@@ -47,7 +47,7 @@ struct JuliaGUI {
 	#[serde(skip)]
 	export_render_ms: Option<f64>,
 	export_res_power: u8,
-	export_max_iter: u16,
+	export_iterations: u32,
 	#[serde(skip)]
 	export_path: PathBuf,
 	#[serde(skip)]
@@ -77,7 +77,7 @@ impl Default for JuliaGUI {
 			preview_render_ms: 0.0,
 			export_render_ms: None,
 			export_res_power: 3,
-			export_max_iter: 512,
+			export_iterations: 512,
 			export_path: "".into(),
 			settings_changed: true,
 			preview_point: false,
@@ -113,7 +113,7 @@ impl JuliaGUI {
 						RenderJob::Exit => break,
 						RenderJob::Render(path, options, color) => {
 							let start_time = SystemTime::now();
-							let image = render_julia(&options, color);
+							let image = render(&options, color);
 							if let Err(err) = image.save(&path) {
 								println!("Failed to save render: {err}");
 							}
@@ -142,9 +142,9 @@ impl JuliaGUI {
 
 	fn update_preview(&mut self) {
 		let start_time = SystemTime::now();
-		let mut frame = render_julia(&self.settings, self.color);
+		let mut frame = render(&self.settings, self.color);
 		if self.preview_point {
-			frame = render_c(&self.settings, frame);
+			frame = view_point(&self.settings, frame);
 		}
 
 		if let Some(preview) = &mut self.preview {
@@ -166,7 +166,7 @@ impl JuliaGUI {
 			let settings = RenderOptions {
 				width: self.settings.width * res_mul,
 				height: self.settings.height * res_mul,
-				max_iter: self.export_max_iter,
+				iterations: self.export_iterations,
 				..self.settings.clone()
 			};
 
@@ -272,8 +272,8 @@ impl eframe::App for JuliaGUI {
 				let set_blue = ui.add(Slider::new(&mut self.color.2, 0..=16));
 
 				ui.label("Preview iterations:");
-				let set_iter =
+				let set_iter = ui
-					ui.add(Slider::new(&mut self.settings.max_iter, 5..=256).clamp_to_range(false));
+					.add(Slider::new(&mut self.settings.iterations, 5..=256).clamp_to_range(false));
 
 				ui.horizontal(|ui| {
 					ui.label("Preview resolution:");
@@ -313,7 +313,7 @@ impl eframe::App for JuliaGUI {
 				});
 
 				ui.label("Render iterations:");
-				ui.add(Slider::new(&mut self.export_max_iter, 5..=1024).clamp_to_range(false));
+				ui.add(Slider::new(&mut self.export_iterations, 5..=1024).clamp_to_range(false));
 				ui.label("Render resolution:");
 				ui.add(Slider::new(&mut self.export_res_power, 0..=6).clamp_to_range(false));
 				ui.label(format!(
@@ -350,7 +350,7 @@ impl eframe::App for JuliaGUI {
 
 				let predicted_render_time = (self.preview_render_ms
 					* (1 << (self.export_res_power * 2)) as f64
-					* (self.export_max_iter as f64 / self.settings.max_iter as f64)
+					* (self.export_iterations as f64 / self.settings.iterations as f64)
 					/ 1000.0)
 					.floor();
 				if predicted_render_time < 60.0 {