Add computeheadless rust shader

Author: LegNeato

examples/computeheadless/computeheadless.cpp

@@ -437,7 +437,7 @@ class VulkanExample
 #else
 			shaderStage.module = vks::tools::loadShader((shadersPath + "headless.comp.spv").c_str(), device);
 #endif
-			shaderStage.pName = "main";
+			shaderStage.pName = (shaderDir == "rust") ? "main_cs" : "main";
 			shaderStage.pSpecializationInfo = &specializationInfo;
 			shaderModule = shaderStage.module;
 

shaders/rust/Cargo.toml

@@ -69,6 +69,7 @@ members = [
     "occlusionquery/simple",
     "occlusionquery/mesh",
     "occlusionquery/occluder",
+    "computeheadless/headless",
 ]
 
 [workspace.dependencies]

shaders/rust/computeheadless/headless.comp.spv

@@ -0,0 +1,10 @@
+[package]
+name = "computeheadless-headless"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+spirv-std = { workspace = true }
+
+[lib]
+crate-type = ["dylib"]

shaders/rust/computeheadless/headless/Cargo.toml

@@ -0,0 +1,32 @@
+#![cfg_attr(target_arch = "spirv", no_std)]
+#![allow(clippy::missing_safety_doc)]
+
+use spirv_std::{spirv, glam::UVec3};
+
+fn fibonacci(n: u32) -> u32 {
+    if n <= 1 {
+        return n;
+    }
+    let mut curr = 1;
+    let mut prev = 1;
+    for i in 2..n {
+        let temp = curr;
+        curr += prev;
+        prev = temp;
+    }
+    curr
+}
+
+#[spirv(compute(threads(1, 1, 1)))]
+pub fn main_cs(
+    #[spirv(global_invocation_id)] global_id: UVec3,
+    #[spirv(storage_buffer, descriptor_set = 0, binding = 0)] values: &mut [u32],
+    #[spirv(spec_constant(id = 0))] buffer_elements: u32,
+) {
+    let index = global_id.x;
+    if index >= buffer_elements {
+        return;
+    }
+    
+    values[index as usize] = fibonacci(values[index as usize]);
+}