switch to palette

since we're gonna need to do color things later

Cargo.lock

@@ -61,12 +61,33 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+
 [[package]]
 name = "bitflags"
 version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
 
+[[package]]
+name = "by_address"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64fa3c856b712db6612c019f14756e64e4bcea13337a6b33b696333a9eaa2d06"
+
 [[package]]
 name = "bytemuck"
 version = "1.24.0"
@@ -292,13 +313,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "oklab"
+name = "num-traits"
-version = "1.1.2"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1e35ab3c8efa6bc97d651abe7fb051aebb30c925a450ff6722cf9c797a938cc"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
- "fast-srgb8",
+ "autocfg",
- "rgb",
 ]
 
 [[package]]
@@ -313,6 +333,72 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
 
+[[package]]
+name = "palette"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cbf71184cc5ecc2e4e1baccdb21026c20e5fc3dcf63028a086131b3ab00b6e6"
+dependencies = [
+ "approx",
+ "fast-srgb8",
+ "palette_derive",
+ "phf",
+]
+
+[[package]]
+name = "palette_derive"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5030daf005bface118c096f510ffb781fc28f9ab6a32ab224d8631be6851d30"
+dependencies = [
+ "by_address",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "phf"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078"
+dependencies = [
+ "phf_macros",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c80231409c20246a13fddb31776fb942c38553c51e871f8cbd687a4cfb5843d"
+dependencies = [
+ "phf_shared",
+ "rand",
+]
+
+[[package]]
+name = "phf_macros"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f84ac04429c13a7ff43785d75ad27569f2951ce0ffd30a3321230db2fc727216"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67eabc2ef2a60eb7faa00097bd1ffdb5bd28e62bf39990626a582201b7a754e5"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.16"
@@ -381,6 +467,21 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+
 [[package]]
 name = "regex"
 version = "1.12.2"
@@ -410,12 +511,6 @@ version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
 
-[[package]]
-name = "rgb"
-version = "0.8.52"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c6a884d2998352bb4daf0183589aec883f16a6da1f4dde84d8e2e9a5409a1ce"
-
 [[package]]
 name = "rustix"
 version = "1.1.3"
@@ -455,6 +550,12 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "siphasher"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
+
 [[package]]
 name = "slab"
 version = "0.4.11"
@@ -564,7 +665,7 @@ dependencies = [
  "env_logger",
  "eyre",
  "log",
- "oklab",
+ "palette",
  "smithay-client-toolkit",
  "wayland-client",
 ]

Cargo.toml

@@ -7,6 +7,9 @@ edition = "2024"
 env_logger = "0.11.8"
 eyre = "0.6.12"
 log = "0.4.29"
-oklab = "1.1.2"
+palette = "0.7.6"
 smithay-client-toolkit = "0.20.0"
 wayland-client = "0.31.11"
+
+[profile.dev]
+opt-level = 1

src/main.rs

@@ -2,6 +2,7 @@ use std::time::Duration;
 
 use eyre::{Context, Result};
 use log::{info, warn};
+use palette::FromColor;
 use smithay_client_toolkit::{
     compositor::{CompositorHandler, CompositorState},
     output::{OutputHandler, OutputState},
@@ -224,19 +225,12 @@ impl LayerShellHandler for App {
                 let x = (index % width as usize) as u32;
                 let y = (index / width as usize) as u32;
 
-                let xf = x as f32 / width as f32;
+                let srgb = color_for_pixel(x, y, width, height);
-                let yf = y as f32 / height as f32;
-
-                let srgb = oklab::oklab_to_srgb(oklab::Oklab {
-                    l: 0.7,
-                    a: xf * 0.8 - 0.4,
-                    b: yf * 0.8 - 0.4,
-                });
 
                 let a = 0xFF;
-                let r = srgb.r as u32;
+                let r = srgb.red as u32;
-                let g = srgb.g as u32;
+                let g = srgb.green as u32;
-                let b = srgb.b as u32;
+                let b = srgb.blue as u32;
                 let color = (a << 24) + (r << 16) + (g << 8) + b;
 
                 let array: &mut [u8; 4] = chunk.try_into().unwrap();
@@ -260,6 +254,18 @@ impl LayerShellHandler for App {
     }
 }
 
+fn color_for_pixel(x: u32, y: u32, width: u32, height: u32) -> palette::Srgb<u8> {
+    let xf = x as f32 / width as f32;
+    let yf = y as f32 / height as f32;
+
+    palette::Srgb::from_color(palette::Oklab {
+        l: 0.7,
+        a: xf * 0.8 - 0.4,
+        b: yf * 0.8 - 0.4,
+    })
+    .into_format::<u8>()
+}
+
 impl ShmHandler for App {
     fn shm_state(&mut self) -> &mut Shm {
         &mut self.shm