Add descriptorbuffer rust shader

Author: LegNeato

shaders/rust/Cargo.lock

@@ -72,6 +72,7 @@ members = [
     "computeheadless/headless",
     "debugprintf/toon",
     "pushdescriptors/cube",
+    "descriptorbuffer/cube",
 ]
 
 [workspace.dependencies]

shaders/rust/Cargo.toml

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

shaders/rust/descriptorbuffer/cube.frag.spv

@@ -0,0 +1,49 @@
+#![cfg_attr(target_arch = "spirv", no_std)]
+#![allow(clippy::missing_safety_doc)]
+
+use spirv_std::{spirv, glam::{vec4, Mat4, Vec2, Vec3, Vec4}, Image};
+use spirv_std::image::SampledImage;
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct UboCamera {
+    pub projection: Mat4,
+    pub view: Mat4,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct UboModel {
+    pub matrix: Mat4,
+}
+
+#[spirv(vertex)]
+pub fn main_vs(
+    in_pos: Vec3,
+    in_normal: Vec3,
+    in_uv: Vec2,
+    in_color: Vec3,
+    #[spirv(uniform, descriptor_set = 0, binding = 0)] camera: &UboCamera,
+    #[spirv(uniform, descriptor_set = 1, binding = 0)] model: &UboModel,
+    #[spirv(position)] out_position: &mut Vec4,
+    out_normal: &mut Vec3,
+    out_color: &mut Vec3,
+    out_uv: &mut Vec2,
+) {
+    *out_normal = in_normal;
+    *out_color = in_color;
+    *out_uv = in_uv;
+    *out_position = camera.projection * camera.view * model.matrix * vec4(in_pos.x, in_pos.y, in_pos.z, 1.0);
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    _in_normal: Vec3,
+    in_color: Vec3,
+    in_uv: Vec2,
+    #[spirv(descriptor_set = 2, binding = 0)] sampler_color_map: &SampledImage<Image!(2D, type=f32, sampled)>,
+    out_frag_color: &mut Vec4,
+) {
+    let texture_color = sampler_color_map.sample(in_uv);
+    *out_frag_color = texture_color * vec4(in_color.x, in_color.y, in_color.z, 1.0);
+}