From 64b2863fc2826fb2035f9f5168700065f1c7113e Mon Sep 17 00:00:00 2001
From: Bradlee Speice <bradlee@speice.io>
Date: Fri, 19 Jun 2026 11:42:50 -0400
Subject: [PATCH] Initial commit

---
 .gitea/workflows/ci.yml        |  34 ++
 .github                        |   1 +
 .gitignore                     |   2 +
 Cargo.lock                     | 900 +++++++++++++++++++++++++++++++++
 Cargo.toml                     |  26 +
 enkou-shaders-tests/Cargo.toml |  18 +
 enkou-shaders-tests/build.rs   |  24 +
 enkou-shaders-tests/src/lib.rs |  67 +++
 enkou-shaders/Cargo.toml       |  15 +
 enkou-shaders/src/lib.rs       |  36 ++
 10 files changed, 1123 insertions(+)
 create mode 100644 .gitea/workflows/ci.yml
 create mode 120000 .github
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 enkou-shaders-tests/Cargo.toml
 create mode 100644 enkou-shaders-tests/build.rs
 create mode 100644 enkou-shaders-tests/src/lib.rs
 create mode 100644 enkou-shaders/Cargo.toml
 create mode 100644 enkou-shaders/src/lib.rs

diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..192a9b8
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: "CI"
+on:
+  push:
+  pull_request:
+
+jobs:
+  formatting:
+    name: cargo fmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: rustfmt
+      - name: Rustfmt Check
+        uses: actions-rust-lang/rustfmt@v1
+
+  test:
+    name: cargo test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - run: cargo check
+      - run: cargo test
+
+  test-gpu:
+    name: cargo test (GPU)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - run: cargo install --git https://github.com/rust-gpu/rust-gpu cargo-gpu
+      - run: cargo gpu check -p enkou-shaders
diff --git a/.github b/.github
new file mode 120000
index 0000000..7a213d8
--- /dev/null
+++ b/.github
@@ -0,0 +1 @@
+.gitea
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..db4175d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/.idea/
+/target
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..cb8c6b3
--- /dev/null
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..fa17411
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,26 @@
+[workspace]
+members = [
+    "enkou-shaders",
+    "enkou-shaders-tests",
+]
+resolver = "3"
+
+[workspace.package]
+version = "0.1.0"
+authors = ["Bradlee Speice <bradlee@speice.io>"]
+edition = "2024"
+license = "MIT"
+repository = ""
+
+[workspace.lints.rust]
+unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spirv"))'] }
+
+[workspace.dependencies]
+cargo-gpu-install = { git = "https://github.com/Rust-GPU/rust-gpu.git", rev = "67f1ff2" }
+spirv-std = { git = "https://github.com/Rust-GPU/rust-gpu.git", rev = "67f1ff2" }
+
+anyhow = "1.0.102"
+bytemuck = { version = "1.25.0", features = ["derive"] }
+glam = { version = "0.33.1", default-features = false, features = ["libm"] }
+rspirv = "0.13.0"
+
diff --git a/enkou-shaders-tests/Cargo.toml b/enkou-shaders-tests/Cargo.toml
new file mode 100644
index 0000000..1627234
--- /dev/null
+++ b/enkou-shaders-tests/Cargo.toml
@@ -0,0 +1,18 @@
+[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
diff --git a/enkou-shaders-tests/build.rs b/enkou-shaders-tests/build.rs
new file mode 100644
index 0000000..09bd720
--- /dev/null
+++ b/enkou-shaders-tests/build.rs
@@ -0,0 +1,24 @@
+use cargo_gpu_install::install::Install;
+use cargo_gpu_install::spirv_builder::{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;
+
+    let compile_result = builder.build()?;
+    let spv_path = compile_result.module.unwrap_single();
+    println!("cargo::rustc-env=SHADER_SPV_PATH={}", spv_path.display());
+    Ok(())
+}
diff --git a/enkou-shaders-tests/src/lib.rs b/enkou-shaders-tests/src/lib.rs
new file mode 100644
index 0000000..aa6eaaa
--- /dev/null
+++ b/enkou-shaders-tests/src/lib.rs
@@ -0,0 +1,67 @@
+#[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 ref entry_point in shader().entry_points.iter() {
+            let operands: Vec<Operand> = entry_point
+                .operands
+                .iter()
+                .filter(|op| match op {
+                    Operand::ExecutionModel(_) | Operand::LiteralString(_) => true,
+                    _ => false,
+                })
+                .map(|op| op.clone())
+                .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_fs() {
+        assert!(has_entry_point(ExecutionModel::Fragment, "main_fs"))
+    }
+
+    #[test]
+    pub fn has_entry_main_vs() {
+        assert!(has_entry_point(ExecutionModel::Vertex, "main_vs"))
+    }
+}
diff --git a/enkou-shaders/Cargo.toml b/enkou-shaders/Cargo.toml
new file mode 100644
index 0000000..59ffd5a
--- /dev/null
+++ b/enkou-shaders/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "enkou-shaders"
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+spirv-std.workspace = true
+glam.workspace = true
+bytemuck.workspace = true
diff --git a/enkou-shaders/src/lib.rs b/enkou-shaders/src/lib.rs
new file mode 100644
index 0000000..d2b343a
--- /dev/null
+++ b/enkou-shaders/src/lib.rs
@@ -0,0 +1,36 @@
+#![no_std]
+
+use bytemuck::{Pod, Zeroable};
+use core::f32::consts::PI;
+use glam::{Vec3, Vec4, vec2, vec3};
+#[cfg(target_arch = "spirv")]
+use spirv_std::num_traits::Float;
+use spirv_std::spirv;
+
+#[derive(Copy, Clone, Pod, Zeroable)]
+#[repr(C)]
+pub struct ShaderConstants {
+    pub width: u32,
+    pub height: u32,
+    pub time: f32,
+}
+
+#[spirv(fragment)]
+pub fn main_fs(vtx_color: Vec3, output: &mut Vec4) {
+    *output = Vec4::from((vtx_color, 1.));
+}
+
+#[spirv(vertex)]
+pub fn main_vs(
+    #[spirv(vertex_index)] vert_id: i32,
+    #[spirv(descriptor_set = 0, binding = 0, storage_buffer)] constants: &ShaderConstants,
+    #[spirv(position)] vtx_pos: &mut Vec4,
+    vtx_color: &mut Vec3,
+) {
+    let speed = 0.4;
+    let time = constants.time * speed + vert_id as f32 * (2. * PI * 120. / 360.);
+    let position = vec2(f32::sin(time), f32::cos(time));
+    *vtx_pos = Vec4::from((position, 0.0, 1.0));
+
+    *vtx_color = [vec3(1., 0., 0.), vec3(0., 1., 0.), vec3(0., 0., 1.)][vert_id as usize % 3];
+}