Compare commits
3 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
 bspeice
|
fc76a8308a | ||
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bspeice
|
0d2e80145c | ||
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bspeice
|
7adb747625 |
Generated
+3
-687
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|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0f9152d31db0792fa83f70fb2f83148effb5c1f5b8c7686c3459e361d9bc20bf"
|
||||
dependencies = [
|
||||
"displaydoc",
|
||||
"yoke",
|
||||
"zerofrom",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "zerovec"
|
||||
version = "0.11.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "90f911cbc359ab6af17377d242225f4d75119aec87ea711a880987b18cd7b239"
|
||||
dependencies = [
|
||||
"yoke",
|
||||
"zerofrom",
|
||||
"zerovec-derive",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "zerovec-derive"
|
||||
version = "0.11.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "625dc425cab0dca6dc3c3319506e6593dcb08a9f387ea3b284dbd52a92c40555"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "zmij"
|
||||
version = "1.0.21"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
|
||||
|
||||
[[package]]
|
||||
name = "zune-core"
|
||||
version = "0.5.1"
|
||||
|
||||
+1
-2
@@ -1,7 +1,6 @@
|
||||
[workspace]
|
||||
members = [
|
||||
"enkou-shaders",
|
||||
"enkou-shaders-tests",
|
||||
]
|
||||
resolver = "3"
|
||||
|
||||
@@ -13,6 +12,7 @@ license = "MIT"
|
||||
repository = ""
|
||||
|
||||
[workspace.lints.rust]
|
||||
missing_docs = { level = "warn" }
|
||||
unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spirv"))'] }
|
||||
|
||||
[workspace.dependencies]
|
||||
@@ -26,5 +26,4 @@ image = { version = "0.25.10", default-features = false, features = ["default-fo
|
||||
libm = "0.2.16"
|
||||
rand = { version = "0.10.1", default-features = false }
|
||||
rand_xoshiro = "0.8.1"
|
||||
rspirv = "0.13.0"
|
||||
tempfile = "3.27.0"
|
||||
|
||||
@@ -1,18 +0,0 @@
|
||||
[package]
|
||||
name = "enkou-shaders-tests"
|
||||
publish = false
|
||||
version.workspace = true
|
||||
authors.workspace = true
|
||||
edition.workspace = true
|
||||
license.workspace = true
|
||||
repository.workspace = true
|
||||
|
||||
[lints]
|
||||
workspace = true
|
||||
|
||||
[dependencies]
|
||||
rspirv.workspace = true
|
||||
|
||||
[build-dependencies]
|
||||
anyhow.workspace = true
|
||||
cargo-gpu-install.workspace = true
|
||||
@@ -1,25 +0,0 @@
|
||||
use cargo_gpu_install::install::Install;
|
||||
use cargo_gpu_install::spirv_builder::{Capability, ShaderPanicStrategy, SpirvMetadata};
|
||||
use std::path::PathBuf;
|
||||
|
||||
pub fn main() -> anyhow::Result<()> {
|
||||
let manifest_dir = env!("CARGO_MANIFEST_DIR");
|
||||
let crate_path = [manifest_dir, "..", "enkou-shaders"]
|
||||
.iter()
|
||||
.copied()
|
||||
.collect::<PathBuf>();
|
||||
|
||||
let install = Install::from_shader_crate(crate_path.clone())
|
||||
.within_build_script()
|
||||
.run()?;
|
||||
let mut builder = install.to_spirv_builder(crate_path, "spirv-unknown-vulkan1.3");
|
||||
builder.build_script.defaults = true;
|
||||
builder.shader_panic_strategy = ShaderPanicStrategy::SilentExit;
|
||||
builder.spirv_metadata = SpirvMetadata::Full;
|
||||
builder.capabilities = vec![Capability::Int8, Capability::Int16, Capability::Int64];
|
||||
|
||||
let compile_result = builder.build()?;
|
||||
let spv_path = compile_result.module.unwrap_single();
|
||||
println!("cargo::rustc-env=SHADER_SPV_PATH={}", spv_path.display());
|
||||
Ok(())
|
||||
}
|
||||
@@ -1,67 +0,0 @@
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use rspirv::binary::parse_bytes;
|
||||
use rspirv::dr::{Module, Operand};
|
||||
use rspirv::spirv::ExecutionModel;
|
||||
use std::sync::OnceLock;
|
||||
|
||||
static SHADER_MODULE: OnceLock<Module> = OnceLock::new();
|
||||
|
||||
fn shader() -> &'static Module {
|
||||
SHADER_MODULE.get_or_init(|| {
|
||||
let shader_bytes = include_bytes!(env!("SHADER_SPV_PATH"));
|
||||
|
||||
let mut loader = rspirv::dr::Loader::new();
|
||||
parse_bytes(shader_bytes, &mut loader).expect("Unable to parse shader");
|
||||
|
||||
loader.module()
|
||||
})
|
||||
}
|
||||
|
||||
fn has_entry_point(execution_model: ExecutionModel, name: &str) -> bool {
|
||||
for entry_point in shader().entry_points.iter() {
|
||||
let operands: Vec<Operand> = entry_point
|
||||
.operands
|
||||
.iter()
|
||||
.filter(|op| matches!(op, Operand::ExecutionModel(_) | Operand::LiteralString(_)))
|
||||
.cloned()
|
||||
.collect();
|
||||
|
||||
assert_eq!(operands.len(), 2);
|
||||
match &operands[0] {
|
||||
Operand::ExecutionModel(actual) => {
|
||||
if execution_model != *actual {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
op => panic!("Unexpected operand; {}", op),
|
||||
}
|
||||
|
||||
match &operands[1] {
|
||||
Operand::LiteralString(actual) => {
|
||||
if name != actual {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
op => panic!("Unexpected operand; {}", op),
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
false
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn has_entry_main_chaos_game() {
|
||||
assert!(has_entry_point(
|
||||
ExecutionModel::GLCompute,
|
||||
"main_chaos_game"
|
||||
))
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn has_entry_main_camera() {
|
||||
assert!(has_entry_point(ExecutionModel::GLCompute, "main_camera"))
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,106 @@
|
||||
//! # Fractal flame
|
||||
//!
|
||||
//! The `flam3` sources include example parameters (`test.flam3`) to demonstrate the fractal flame algorithm,
|
||||
//! which are copied here and used to generate an image that can be compared against the reference `flam3` renderer
|
||||
|
||||
use anyhow::Result;
|
||||
use enkou_shaders::chaos_game::ChaosGame;
|
||||
use enkou_shaders::transform::Transform;
|
||||
use enkou_shaders::variation::{Variation, VariationKind};
|
||||
use glam::{UVec2, UVec3, UVec4, Vec2, Vec2Swizzles, Vec4};
|
||||
use rand::SeedableRng;
|
||||
use rand_xoshiro::Xoshiro256StarStar;
|
||||
use enkou_shaders::camera::Camera;
|
||||
use enkou_shaders::image::BlendMode;
|
||||
|
||||
const ITERATIONS_DISCARD: usize = 100;
|
||||
const IMAGE_DIMENSIONS: UVec2 = UVec2::new(640, 480);
|
||||
const IMAGE_QUALITY: f32 = 10.0;
|
||||
|
||||
// Palette data copied from `flam3-palettes.xml`.
|
||||
// Palettes are ASCII hexadecimal strings; two characters form a byte,
|
||||
// and bytes are grouped in triplets to get a single RGB color.
|
||||
const PALETTE: &'static str = "\
|
||||
00dadebc00eee6c500eef2ce00eef2cf00e6eee100eaeed800f2f1eb00f2f5d8
|
||||
00e6f2ce00deeac500d6dac600ced2bc00c2caa900becaa000ced6aa00dee2c5
|
||||
00eaedce00eaf2c500dee2c500c2caaa00aebeaa00a5b29600a2a98d0096a284
|
||||
008d8d7a0085897100858d710085856700797d6700797d670071795e00656d55
|
||||
004d5d4200344025003040250030381c002c3c1c002c341c00242c1200242400
|
||||
00242c0900283409003840120030401c0040502f0055694200657555006c7d5e
|
||||
00748d710074898400748d8400788d840079897a0079857100757d670071795e
|
||||
006c715e006d705e006c795e0068755e00697155006d7555006d755500697155
|
||||
0065715500696d550064715e006870670068706700686c67006c6c5e0071715e
|
||||
0079796700818571007d91710085927a0085927a007d9284007992840078928d
|
||||
00788d8d00748d84007492840075927a006c85670064795e0059694b00aa5700
|
||||
0038441c00303c1c002c3c1c003440250050614b005d6d5e0064715e0060715e
|
||||
0060755e0068755e006c795e006c795e0071796700707967006c7d6700687967
|
||||
006c7967006c75670071755e0071755e0075795e00757d5e00818d5e008d925e
|
||||
008d9267009a9a71009aa27a009aa27a009aa17a00929a71008992670081855e
|
||||
007d7d550069794b00616d4200444c250038441c0040512500454d2500716d42
|
||||
00797d4b00817d5500797955006d755500697d55006c795e006579540068795e
|
||||
00647967006479670068755e0064715e00646c5e00656d55004d584200344025
|
||||
002c381c0020281c001c1409001818000004140000081000000c1800001c2809
|
||||
00243012003c4425005d6555007579550085895e008991710096a271009aa27a
|
||||
009eaa7a009eaa7a00aaae7100a6aa7a00a2aa7a00a1a57a00969e7a0085967a
|
||||
0081927a0078927a0075927a00758d7a00708167007d7d670089896700929a71
|
||||
009eaa7a00aab68400b2b68d00b6ba9700c2ca9700b2be8d00b2b68d00aab28d
|
||||
00a2ae84009aa67a00929e7a00859a7a007d967a007d927a007d9284007d9284
|
||||
0081968400859684008596840081928400859a8400859a84008d9a8400929684
|
||||
009ea98400aeb28400aaba8400b2be8d00b6c2a000c6caa000c6ceaa00d6dab3
|
||||
00dae2c500d2d6bc00bec2a000aab68d009ea67a00929a710089897100817d67
|
||||
007d7d6700817867007d7d5e0079795e0079815e00817d6700817d6700818167
|
||||
008189710085917a0089927a00969d7a00969e7a0092968400969a8d00929284
|
||||
0089918400819284007d928d0078928d0074928d0078928d007896970081968d
|
||||
0081968d00819a8d00859a8d00899e8d00899e8d008da2970095a297008da297
|
||||
0096a68d009aa18d009ea984009ea67a00a2a571009ea671009aa67100959d71";
|
||||
|
||||
/// Generate an image
|
||||
pub fn main() -> Result<()> {
|
||||
let transforms: &[Transform] = &[];
|
||||
|
||||
let weights = [0.25; 4];
|
||||
|
||||
let variations = [Variation::new(
|
||||
VariationKind::Spherical,
|
||||
1.0,
|
||||
[0.0; 4].into(),
|
||||
)];
|
||||
|
||||
let camera = Camera::new(IMAGE_DIMENSIONS, Vec2::ZERO, 0.0, Vec2::ZERO, (IMAGE_DIMENSIONS / 2).as_vec2());
|
||||
|
||||
let palette_chars: String = PALETTE.chars().filter(|c| c.is_alphanumeric()).collect();
|
||||
let palette_bytes: Vec<u8> = (0..palette_chars.len())
|
||||
.step_by(2)
|
||||
.map(|i| {
|
||||
let s = &palette_chars[i..i + 2];
|
||||
let b = u8::from_str_radix(s, 16).expect("illegal palette value");
|
||||
b
|
||||
})
|
||||
.collect();
|
||||
let palette_colors: Vec<Vec4> = palette_bytes
|
||||
.chunks(3)
|
||||
.map(|chunk| [chunk[0] as f32, chunk[1] as f32, chunk[2] as f32, 255.0].into())
|
||||
.collect();
|
||||
|
||||
let mut rng = Xoshiro256StarStar::from_seed([4u8; 32]);
|
||||
let chaos_game = ChaosGame::new(&mut rng, transforms, &weights, &variations);
|
||||
|
||||
let mut image_accum: Vec<Vec4> = Vec::new();
|
||||
image_accum.resize(IMAGE_DIMENSIONS.element_product() as usize, Vec4::ZERO);
|
||||
|
||||
let iterations: usize = (IMAGE_DIMENSIONS.element_product() as f32 * IMAGE_QUALITY) as usize;
|
||||
chaos_game.skip(ITERATIONS_DISCARD).take(iterations).for_each(|(ifs_point, ifs_color)| {
|
||||
let pixel_point = camera.transform_point_to_image(ifs_point);
|
||||
if pixel_point.is_none() {
|
||||
return;
|
||||
}
|
||||
|
||||
let pixel_point = pixel_point.unwrap();
|
||||
let pixel_index = pixel_point.y * IMAGE_DIMENSIONS.x + pixel_point.x;
|
||||
|
||||
let pixel_color = BlendMode::Linear.ifs_to_rgb(ifs_color, palette_colors.as_ref());
|
||||
image_accum[pixel_index as usize] += pixel_color;
|
||||
});
|
||||
|
||||
Ok(())
|
||||
}
|
||||
@@ -1,55 +1,51 @@
|
||||
//! # Sierpinski Gasket
|
||||
//!
|
||||
//! The Sierpinski Gasket is a simple iterated function system (IFS) that demonstrates
|
||||
//! the basic principles of using the "chaos game" to generate images. Using a set of three
|
||||
//! transforms, generate new points in the function system using the chaos game,
|
||||
//! then plot those points and display the resulting image.
|
||||
use anyhow::{Context, Result};
|
||||
use enkou_shaders::Coefficients2;
|
||||
use enkou_shaders::camera::Camera;
|
||||
use enkou_shaders::camera::entry::main_camera;
|
||||
use enkou_shaders::chaos_game::entry::main_chaos_game;
|
||||
use enkou_shaders::chaos_game::ChaosGame;
|
||||
use enkou_shaders::transform::Transform;
|
||||
use enkou_shaders::variation::Variation;
|
||||
use glam::{Affine2, IVec2, UVec2, Vec2, uvec2};
|
||||
use glam::{Affine2, UVec2, Vec2, uvec2};
|
||||
use image::{GrayImage, Luma};
|
||||
use rand::SeedableRng;
|
||||
use rand_xoshiro::Xoshiro256StarStar;
|
||||
use std::mem;
|
||||
use std::process::Command;
|
||||
use tempfile::NamedTempFile;
|
||||
|
||||
const ITERATIONS_DISCARD: u32 = 20;
|
||||
const ITERATIONS: u32 = 50_000;
|
||||
const ITERATIONS_DISCARD: usize = 20;
|
||||
const IMAGE_DIMENSION: UVec2 = uvec2(600, 600);
|
||||
const IMAGE_QUALITY: f32 = 1.0;
|
||||
|
||||
/// Build and display a simple fractal - the Sierpinski Gasket
|
||||
pub fn main() -> Result<()> {
|
||||
let mut rng = Xoshiro256StarStar::from_seed([4u8; 32]);
|
||||
|
||||
let transforms = [
|
||||
{
|
||||
// F_0: (x / 2, y / 2)
|
||||
let coefficients = Affine2::from_coefficients(0.5, 0.0, 0.0, 0.0, 0.5, 0.0);
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1))
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1), 0.0, 0.5)
|
||||
},
|
||||
{
|
||||
// F_1: ((x + 1) / 2, y / 2)
|
||||
let coefficients = Affine2::from_coefficients(0.5, 0.0, 0.5, 0.0, 0.5, 0.0);
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1))
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1), 0.5, 0.5)
|
||||
},
|
||||
{
|
||||
// F_2: (x / 2, (y + 1) / 2)
|
||||
let coefficients = Affine2::from_coefficients(0.5, 0.0, 0.0, 0.0, 0.5, 0.5);
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1))
|
||||
Transform::new(coefficients, Affine2::IDENTITY, uvec2(0, 1), 1.0, 0.5)
|
||||
},
|
||||
];
|
||||
|
||||
let weights = [1.0 / 3.0, 1.0 / 3.0, 1.0 / 3.0];
|
||||
|
||||
let variations = [Variation::IDENTITY];
|
||||
|
||||
let mut output_points_ifs = Vec::new();
|
||||
output_points_ifs.resize(ITERATIONS as usize, Vec2::ZERO);
|
||||
|
||||
main_chaos_game(
|
||||
ITERATIONS_DISCARD,
|
||||
&[4u8; 32],
|
||||
&transforms,
|
||||
&weights,
|
||||
&variations,
|
||||
&mut output_points_ifs,
|
||||
);
|
||||
|
||||
// The gasket is defined on the range [0, 1] for both X and Y
|
||||
let camera = Camera::new(
|
||||
IMAGE_DIMENSION,
|
||||
@@ -59,33 +55,28 @@ pub fn main() -> Result<()> {
|
||||
IMAGE_DIMENSION.as_vec2(),
|
||||
);
|
||||
|
||||
let mut output_points_pixel = Vec::new();
|
||||
output_points_pixel.resize(ITERATIONS as usize, IVec2::ZERO);
|
||||
|
||||
main_camera(&camera, &output_points_ifs, &mut output_points_pixel);
|
||||
|
||||
let mut image = GrayImage::new(IMAGE_DIMENSION.x, IMAGE_DIMENSION.y);
|
||||
let dimensions = image.dimensions();
|
||||
output_points_pixel
|
||||
.iter()
|
||||
.skip_while(|p| {
|
||||
p.x < 0 || (p.x as u32) > dimensions.0 || p.y < 0 || (p.y as u32) > dimensions.1
|
||||
})
|
||||
.map(|p| (p.x as u32, p.y as u32))
|
||||
.for_each(|(x, y)| image.put_pixel(x, y, Luma([255u8])));
|
||||
let chaos_game = ChaosGame::new(&mut rng, &transforms, &weights, &variations);
|
||||
|
||||
let iterations = (IMAGE_DIMENSION.element_product() as f32 * IMAGE_QUALITY) as usize;
|
||||
chaos_game
|
||||
.skip(ITERATIONS_DISCARD)
|
||||
.take(iterations)
|
||||
.for_each(|(ifs_point, _)| {
|
||||
if let Some(pixel_point) = camera.transform_point_to_image(ifs_point) {
|
||||
image.put_pixel(pixel_point.x, pixel_point.y, Luma([255u8]));
|
||||
}
|
||||
});
|
||||
|
||||
let temp = NamedTempFile::with_suffix(".png").context("Unable to create file for image")?;
|
||||
image.save(temp.path()).context("Unable to save image")?;
|
||||
|
||||
let open_program: &str = cfg_select! {
|
||||
unix => "xdg-open",
|
||||
_ => panic!("No available program to open images")
|
||||
};
|
||||
|
||||
Command::new(open_program)
|
||||
.arg(temp.path())
|
||||
.spawn()?
|
||||
.wait()?;
|
||||
let mut command = cfg_select! {
|
||||
unix => Command::new("xdg-open").arg(temp.path()).spawn(),
|
||||
windows => Command::new("PowerShell").arg("-Command").arg(format!("start {}", temp.path().display())).spawn(),
|
||||
_ => Err(anyhow::anyhow!("No available program to open images"))?
|
||||
}?;
|
||||
command.wait()?;
|
||||
|
||||
// In case the image viewer forks and gives control back prior to reading the file,
|
||||
// drop it and don't run the destructor
|
||||
|
||||
@@ -36,11 +36,12 @@ impl Distribution<f32> for BiUnit {
|
||||
/// * `weights` - Weights are assumed to be normalized; adding all elements together should return the value 1
|
||||
pub fn step_chaos_game<R: Rng>(
|
||||
point: Vec2,
|
||||
color: f32,
|
||||
rng: &mut R,
|
||||
transforms: &[Transform],
|
||||
weights: &[f32],
|
||||
variations: &[Variation],
|
||||
) -> (Vec2, u32) {
|
||||
) -> (Vec2, f32) {
|
||||
let mut choice_weight = rng.sample::<f32, _>(StandardUniform);
|
||||
let mut transform_index: u32 = 0;
|
||||
|
||||
@@ -53,9 +54,10 @@ pub fn step_chaos_game<R: Rng>(
|
||||
transform_index += 1;
|
||||
}
|
||||
|
||||
let transform = &transforms[transform_index as usize];
|
||||
(
|
||||
transforms[transform_index as usize].transform_point(rng, variations, point),
|
||||
transform_index,
|
||||
transform.transform_point(rng, variations, point),
|
||||
transform.transform_color(color),
|
||||
)
|
||||
}
|
||||
|
||||
@@ -65,6 +67,7 @@ pub fn step_chaos_game<R: Rng>(
|
||||
/// New points in the chaos game are produced by iterating on the chaos game.
|
||||
pub struct ChaosGame<'a, R: Rng> {
|
||||
current_point: Vec2,
|
||||
current_color: f32,
|
||||
rng: &'a mut R,
|
||||
transforms: &'a [Transform],
|
||||
weights: &'a [f32],
|
||||
@@ -80,8 +83,10 @@ impl<'a, R: Rng> ChaosGame<'a, R> {
|
||||
variations: &'a [Variation],
|
||||
) -> Self {
|
||||
let current_point = vec2(rng.sample(BiUnit), rng.sample(BiUnit));
|
||||
let current_color = rng.sample(StandardUniform);
|
||||
ChaosGame {
|
||||
current_point,
|
||||
current_color,
|
||||
rng,
|
||||
transforms,
|
||||
weights,
|
||||
@@ -91,54 +96,20 @@ impl<'a, R: Rng> ChaosGame<'a, R> {
|
||||
}
|
||||
|
||||
impl<'a, R: Rng> Iterator for ChaosGame<'a, R> {
|
||||
type Item = Vec2;
|
||||
type Item = (Vec2, f32);
|
||||
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
let (next_point, _) = step_chaos_game(
|
||||
let (next_point, next_color) = step_chaos_game(
|
||||
self.current_point,
|
||||
self.current_color,
|
||||
self.rng,
|
||||
self.transforms,
|
||||
self.weights,
|
||||
self.variations,
|
||||
);
|
||||
self.current_point = next_point;
|
||||
self.current_color = next_color;
|
||||
|
||||
Some(next_point)
|
||||
}
|
||||
}
|
||||
|
||||
/// Shader entry point for running the chaos game to produce new IFS coordinates
|
||||
pub mod entry {
|
||||
use crate::chaos_game::ChaosGame;
|
||||
use crate::rng::xoshiro256starstar_from_seed;
|
||||
use crate::transform::Transform;
|
||||
use crate::variation::Variation;
|
||||
use glam::Vec2;
|
||||
use spirv_std::spirv;
|
||||
|
||||
/// Given a set of fractal flame parameters, generate new IFS coordinates
|
||||
/// and store them in the output array.
|
||||
#[spirv(compute(entry_point_name = "main_chaos_game", threads(1)))]
|
||||
pub fn main_chaos_game(
|
||||
#[spirv(spec_constant(id = 1, default = 20))] iteration_discard: u32,
|
||||
#[spirv(storage_buffer, descriptor_set = 0, binding = 0)] rng_seed: &[u8],
|
||||
#[spirv(storage_buffer, descriptor_set = 0, binding = 1)] transforms: &[Transform],
|
||||
#[spirv(storage_buffer, descriptor_set = 0, binding = 2)] weights: &[f32],
|
||||
#[spirv(storage_buffer, descriptor_set = 0, binding = 3)] variations: &[Variation],
|
||||
#[spirv(storage_buffer, descriptor_set = 1, binding = 0)] output: &mut [Vec2],
|
||||
) {
|
||||
let mut rng_seed_actual = [0u8; 32];
|
||||
(0..32).for_each(|i| rng_seed_actual[i] = rng_seed[i]);
|
||||
|
||||
let mut rng = xoshiro256starstar_from_seed(rng_seed_actual);
|
||||
let mut chaos_game = ChaosGame::new(&mut rng, transforms, weights, variations);
|
||||
|
||||
for _ in 0..iteration_discard {
|
||||
chaos_game.next().unwrap();
|
||||
}
|
||||
|
||||
for i in 0..output.len() {
|
||||
output[i] = chaos_game.next().unwrap();
|
||||
}
|
||||
Some((next_point, next_color))
|
||||
}
|
||||
}
|
||||
|
||||
@@ -0,0 +1,84 @@
|
||||
//! Image
|
||||
use glam::Vec4;
|
||||
use libm::floorf;
|
||||
|
||||
/// Blending modes for mapping IFS color values (which are on a scale `[0, 1]`)
|
||||
/// to RGBA colors.
|
||||
#[derive(Copy, Clone, Default)]
|
||||
#[repr(u32)]
|
||||
pub enum BlendMode {
|
||||
/// Map IFS color values to a linear blend of the nearest two palette colors
|
||||
#[default]
|
||||
Linear = 0,
|
||||
|
||||
/// Map IFS color values to the nearest single palette color
|
||||
Step = 1,
|
||||
}
|
||||
|
||||
impl BlendMode {
|
||||
/// Map an IFS color value to RGBA color from the provided palette.
|
||||
pub fn ifs_to_rgb(&self, color: f32, palette: &[Vec4]) -> Vec4 {
|
||||
let colors_m_one = palette.len() - 1;
|
||||
let period = 1.0 / colors_m_one as f32;
|
||||
let index_lower = floorf(color / period) as usize;
|
||||
let index_upper = (index_lower + 1).clamp(0, colors_m_one);
|
||||
let rem = color % period / period;
|
||||
|
||||
match self {
|
||||
BlendMode::Linear => palette[index_lower].lerp(palette[index_upper], rem),
|
||||
BlendMode::Step => palette[index_lower],
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// UNSAFE: Sound because enum has guaranteed layout (u32) and defined zero-value
|
||||
unsafe impl bytemuck::Zeroable for BlendMode {}
|
||||
// UNSAFE: Sound because enum has guaranteed layout (u32) and defined zero-value
|
||||
unsafe impl bytemuck::Pod for BlendMode {}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use crate::image::BlendMode;
|
||||
use glam::Vec4;
|
||||
|
||||
#[test]
|
||||
fn blend_linear() {
|
||||
let ifs_to_rgb = |color, palette| BlendMode::Linear.ifs_to_rgb(color, palette);
|
||||
|
||||
let palette = &[Vec4::splat(0.0), Vec4::splat(1.0)];
|
||||
assert_eq!(ifs_to_rgb(0.0, palette), Vec4::splat(0.0));
|
||||
assert_eq!(ifs_to_rgb(0.5, palette), Vec4::splat(0.5));
|
||||
assert_eq!(ifs_to_rgb(1.0, palette), Vec4::splat(1.0));
|
||||
|
||||
let palette = &[Vec4::splat(1.0), Vec4::splat(2.0), Vec4::splat(3.0)];
|
||||
assert_eq!(ifs_to_rgb(0.0, palette), Vec4::splat(1.0));
|
||||
assert_eq!(ifs_to_rgb(0.5, palette), Vec4::splat(2.0));
|
||||
assert_eq!(ifs_to_rgb(1.0, palette), Vec4::splat(3.0));
|
||||
|
||||
let palette = &[
|
||||
Vec4::splat(1.0),
|
||||
Vec4::splat(2.0),
|
||||
Vec4::splat(3.0),
|
||||
Vec4::splat(4.0),
|
||||
];
|
||||
assert_eq!(ifs_to_rgb(0.0, palette), Vec4::splat(1.0));
|
||||
assert_eq!(ifs_to_rgb(0.5, palette), Vec4::splat(2.5));
|
||||
assert_eq!(ifs_to_rgb(1.0, palette), Vec4::splat(4.0));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn blend_step() {
|
||||
let ifs_to_rgb = |color, palette| BlendMode::Step.ifs_to_rgb(color, palette);
|
||||
|
||||
let palette = &[Vec4::splat(0.0), Vec4::splat(1.0)];
|
||||
assert_eq!(ifs_to_rgb(0.5, palette), Vec4::splat(0.0));
|
||||
|
||||
let palette = &[Vec4::splat(1.0), Vec4::splat(2.0), Vec4::splat(3.0)];
|
||||
assert_eq!(ifs_to_rgb(0.0, palette), palette[0]);
|
||||
assert_eq!(ifs_to_rgb(0.25, palette), palette[0]);
|
||||
assert_eq!(ifs_to_rgb(0.4, palette), palette[0]);
|
||||
assert_eq!(ifs_to_rgb(0.5, palette), palette[1]);
|
||||
assert_eq!(ifs_to_rgb(0.7, palette), palette[1]);
|
||||
assert_eq!(ifs_to_rgb(1.0, palette), palette[2]);
|
||||
}
|
||||
}
|
||||
@@ -1,11 +1,10 @@
|
||||
//! # Enkou
|
||||
#![no_std]
|
||||
#![deny(missing_docs)]
|
||||
#![allow(clippy::needless_range_loop)] // SPIR-V backend has issues with iteration over items
|
||||
|
||||
pub mod camera;
|
||||
pub mod chaos_game;
|
||||
mod rng;
|
||||
pub mod image;
|
||||
pub mod transform;
|
||||
pub mod variation;
|
||||
|
||||
|
||||
@@ -1,55 +0,0 @@
|
||||
use rand::SeedableRng;
|
||||
use rand_xoshiro::Xoshiro256StarStar;
|
||||
|
||||
/// Convert an RNG state buffer to an instance of [`Xoshiro256StarStar`].
|
||||
///
|
||||
/// While [`SeedableRng::from_seed`] is an infallible function,
|
||||
/// it relies on some methods that can't be compiled by the SPIR-V
|
||||
/// backend (specifically, formatting functions in the core crate).
|
||||
///
|
||||
/// In practice, the xoshiro RNG state is entirely defined by its seed,
|
||||
/// so this function does the work of [`SeedableRng::from_seed`] by
|
||||
/// transmuting the seed value to an RNG instance.
|
||||
///
|
||||
/// This function assumes a properly-initialized state array;
|
||||
/// output may silently degenerate if the initial state is all zeros,
|
||||
/// so this module is private to the crate.
|
||||
pub(crate) fn xoshiro256starstar_from_seed(
|
||||
rng_state: <Xoshiro256StarStar as SeedableRng>::Seed,
|
||||
) -> Xoshiro256StarStar {
|
||||
let mut rng_state_actual = [0u64; 4];
|
||||
|
||||
// NOTE: Bit shifting is bad, but we don't have great alternatives:
|
||||
// - `chunks_exact` has issues with pointer casting
|
||||
// - `u64::from_le_bytes` has issues with `OpBitcast` in SPIR-V validation
|
||||
for i in 0..rng_state_actual.len() {
|
||||
for j in 0..size_of::<u64>() {
|
||||
rng_state_actual[i] |= (rng_state[i * size_of::<u64>() + j] as u64) << (j * 8);
|
||||
}
|
||||
}
|
||||
|
||||
unsafe { core::mem::transmute(rng_state_actual) }
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use crate::rng::xoshiro256starstar_from_seed;
|
||||
use core::iter::zip;
|
||||
use rand::{RngExt, SeedableRng};
|
||||
use rand_xoshiro::Xoshiro256StarStar;
|
||||
|
||||
#[test]
|
||||
fn match_seeded() {
|
||||
let mut seed: <Xoshiro256StarStar as SeedableRng>::Seed = [0u8; 32];
|
||||
for i in 0..seed.len() {
|
||||
seed[i] = i as u8;
|
||||
}
|
||||
|
||||
let rng1 = Xoshiro256StarStar::from_seed(seed).random_iter::<u64>();
|
||||
let rng2 = xoshiro256starstar_from_seed(seed).random_iter::<u64>();
|
||||
|
||||
zip(rng1, rng2)
|
||||
.take(100)
|
||||
.for_each(|(rng1_value, rng2_value)| assert_eq!(rng1_value, rng2_value));
|
||||
}
|
||||
}
|
||||
@@ -5,7 +5,7 @@
|
||||
//! but produce more interesting images once we add variations.
|
||||
use crate::variation::Variation;
|
||||
use bytemuck::{Pod, Zeroable};
|
||||
use glam::{Affine2, UVec2, Vec2};
|
||||
use glam::{Affine2, FloatExt, UVec2, Vec2};
|
||||
use rand::Rng;
|
||||
|
||||
/// Affine transform for use in the [`chaos_game`](crate::chaos_game).
|
||||
@@ -15,15 +15,25 @@ pub struct Transform {
|
||||
coefficients: Affine2,
|
||||
coefficients_post: Affine2,
|
||||
variation_range: UVec2,
|
||||
color: f32,
|
||||
color_speed: f32,
|
||||
}
|
||||
|
||||
impl Transform {
|
||||
/// Create a new transform from an affine transformation matrix
|
||||
pub fn new(coefficients: Affine2, coefficients_post: Affine2, variation_range: UVec2) -> Self {
|
||||
pub fn new(
|
||||
coefficients: Affine2,
|
||||
coefficients_post: Affine2,
|
||||
variation_range: UVec2,
|
||||
color: f32,
|
||||
color_speed: f32,
|
||||
) -> Self {
|
||||
Transform {
|
||||
coefficients,
|
||||
coefficients_post,
|
||||
variation_range,
|
||||
color,
|
||||
color_speed,
|
||||
}
|
||||
}
|
||||
|
||||
@@ -47,14 +57,20 @@ impl Transform {
|
||||
|
||||
self.coefficients_post.transform_point2(point)
|
||||
}
|
||||
|
||||
/// Apply this transform to a color in IFS coordinates, producing a new color
|
||||
pub fn transform_color(&self, color: f32) -> f32 {
|
||||
self.color.lerp(color, self.color_speed)
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use crate::rng::xoshiro256starstar_from_seed;
|
||||
use crate::transform::Transform;
|
||||
use crate::variation::{Variation, VariationKind};
|
||||
use glam::{Affine2, uvec2, vec2};
|
||||
use rand::SeedableRng;
|
||||
use rand_xoshiro::Xoshiro256StarStar;
|
||||
|
||||
#[test]
|
||||
fn transform_scaling() {
|
||||
@@ -63,9 +79,11 @@ mod test {
|
||||
Affine2::from_scale(scale_coefficients),
|
||||
Affine2::IDENTITY,
|
||||
uvec2(0, 1),
|
||||
0.0,
|
||||
0.0,
|
||||
);
|
||||
|
||||
let mut rng = xoshiro256starstar_from_seed([0; 32]);
|
||||
let mut rng = Xoshiro256StarStar::from_seed([0u8; 32]);
|
||||
let variations = [Variation::IDENTITY];
|
||||
let point = vec2(1.0, 1.0);
|
||||
|
||||
@@ -78,14 +96,17 @@ mod test {
|
||||
#[test]
|
||||
fn transform_scaling_post() {
|
||||
let scale_coefficients = vec2(2.0, 0.5);
|
||||
let transform_pdj = Transform::new(Affine2::IDENTITY, Affine2::IDENTITY, uvec2(0, 1));
|
||||
let transform_pdj =
|
||||
Transform::new(Affine2::IDENTITY, Affine2::IDENTITY, uvec2(0, 1), 0.0, 0.0);
|
||||
let transform_pdj_post = Transform::new(
|
||||
Affine2::IDENTITY,
|
||||
Affine2::from_scale(scale_coefficients),
|
||||
uvec2(0, 1),
|
||||
0.0,
|
||||
0.0,
|
||||
);
|
||||
|
||||
let mut rng = xoshiro256starstar_from_seed([0; 32]);
|
||||
let mut rng = Xoshiro256StarStar::from_seed([0; 32]);
|
||||
let variations = [Variation::new(VariationKind::Pdj, 1.0, [0.0f32; 4].into())];
|
||||
let point = vec2(1.0, 1.0);
|
||||
|
||||
@@ -94,4 +115,24 @@ mod test {
|
||||
|
||||
assert_eq!(point_pdj * scale_coefficients, point_pdj_post);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn transform_color() {
|
||||
let starting_color = 0.0;
|
||||
let transform_color = 1.0;
|
||||
let transform_speed = 0.5;
|
||||
|
||||
let transform = Transform::new(
|
||||
Affine2::IDENTITY,
|
||||
Affine2::IDENTITY,
|
||||
uvec2(0, 1),
|
||||
starting_color,
|
||||
transform_speed,
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
transform.transform_color(starting_color),
|
||||
starting_color * (1.0 - transform_speed) + transform_color * transform_speed
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -35,7 +35,7 @@ impl From<[f32; 4]> for VariationParams {
|
||||
pub enum VariationKind {
|
||||
/// Identity variation, returns the point as-is
|
||||
Linear = 0,
|
||||
|
||||
Spherical = 2,
|
||||
Julia = 13,
|
||||
Popcorn = 17,
|
||||
Pdj = 24,
|
||||
@@ -87,6 +87,7 @@ impl Variation {
|
||||
) -> Vec2 {
|
||||
(match self.kind {
|
||||
VariationKind::Linear => transform_point_linear(point),
|
||||
VariationKind::Spherical => transform_point_spherical(point),
|
||||
VariationKind::Julia => transform_point_julia(point, rng),
|
||||
VariationKind::Popcorn => transform_point_popcorn(point, coefficients),
|
||||
VariationKind::Pdj => transform_point_pdj(point, &self.params),
|
||||
@@ -98,6 +99,12 @@ fn transform_point_linear(point: Vec2) -> Vec2 {
|
||||
point
|
||||
}
|
||||
|
||||
fn transform_point_spherical(point: Vec2) -> Vec2 {
|
||||
let r2 = (point * point).element_sum();
|
||||
let r2_inv = 1.0 / r2;
|
||||
|
||||
point * Vec2::splat(r2_inv)
|
||||
}
|
||||
fn transform_point_julia<R: Rng>(point: Vec2, rng: &mut R) -> Vec2 {
|
||||
let x2 = powf(point.x, 2.0);
|
||||
let y2 = powf(point.y, 2.0);
|
||||
|
||||
Reference in New Issue
Block a user