Parralelize buildtime shader loading

Cargo.lock

@@ -2130,6 +2130,7 @@ dependencies = [
  "imgui-wgpu",
  "imgui-winit-support",
  "log",
+ "rayon",
  "shaderc",
  "tobj",
  "wgpu",

Cargo.toml

@@ -26,3 +26,4 @@ shaderc = "0.7"
 fs_extra = "1"
 anyhow = "1"
 glob = "0.3"
+rayon = "1"

build.rs

@@ -6,6 +6,7 @@ use std::{
     env,
     fs::{read_to_string, write},
 };
+use rayon::prelude::*;
 
 struct ShaderData {
     src: String,
@@ -41,15 +42,13 @@ impl ShaderData {
 }
 
 fn main() -> Result<()> {
-    let mut shader_paths = [
+    let mut shader_paths = Vec::new();
-        glob("./src/**/*.vert")?,
+    shader_paths.extend(glob("./src/**/*.vert")?);
-        glob("./src/**/*.frag")?,
+    shader_paths.extend(glob("./src/**/*.frag")?);
-        glob("./src/**/*.comp")?,
+    shader_paths.extend(glob("./src/**/*.comp")?);
-    ];
 
     let shaders: Result<Vec<_>> = shader_paths
-        .iter_mut()
+        .into_par_iter()
-        .flatten()
         .map(|glob_result| ShaderData::load(glob_result?))
         .collect();
 

src/main.rs

@@ -5,14 +5,6 @@ use winit::{dpi::PhysicalPosition, event::*, event_loop::{ControlFlow, EventLoop
 
 use cgmath::prelude::*;
 
-#[rustfmt::skip]
-pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
-    1.0, 0.0, 0.0, 0.0,
-    0.0, 1.0, 0.0, 0.0,
-    0.0, 0.0, 0.5, 0.0,
-    0.0, 0.0, 0.5, 1.0,
-);
-
 mod camera;
 mod light;
 mod model;