Add conservativeraster rust shaders

Author: LegNeato

shaders/rust/Cargo.lock

@@ -143,6 +143,9 @@ members = [
     "meshshader/meshshader",
     "terraintessellation/terrain",
     "terraintessellation/skysphere",
+    "conservativeraster/triangle",
+    "conservativeraster/triangleoverlay",
+    "conservativeraster/fullscreen",
 ]
 
 [workspace.package]

shaders/rust/Cargo.toml

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

shaders/rust/conservativeraster/fullscreen.frag.spv

@@ -0,0 +1,33 @@
+#![no_std]
+
+use spirv_std::glam::{Vec2, Vec4};
+use spirv_std::spirv;
+use spirv_std::{Image, Sampler};
+
+#[spirv(vertex)]
+pub fn main_vs(
+    #[spirv(vertex_index)] vertex_index: u32,
+    #[spirv(position)] out_position: &mut Vec4,
+    out_uv: &mut Vec2,
+) {
+    *out_uv = Vec2::new(
+        ((vertex_index << 1) & 2) as f32,
+        (vertex_index & 2) as f32,
+    );
+    *out_position = Vec4::new(
+        out_uv.x * 2.0 - 1.0,
+        out_uv.y * 2.0 - 1.0,
+        0.0,
+        1.0,
+    );
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    in_uv: Vec2,
+    #[spirv(descriptor_set = 0, binding = 0)] sampler_color: &Image!(2D, type=f32, sampled),
+    #[spirv(descriptor_set = 0, binding = 0)] sampler: &Sampler,
+    out_frag_color: &mut Vec4,
+) {
+    *out_frag_color = sampler_color.sample(*sampler, in_uv);
+}

shaders/rust/conservativeraster/fullscreen.vert.spv

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

shaders/rust/conservativeraster/fullscreen/Cargo.toml

@@ -0,0 +1,31 @@
+#![no_std]
+
+use spirv_std::glam::{Mat4, Vec3, Vec4};
+use spirv_std::spirv;
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct UBO {
+    pub projection: Mat4,
+    pub model: Mat4,
+}
+
+#[spirv(vertex)]
+pub fn main_vs(
+    in_pos: Vec3,
+    in_color: Vec3,
+    #[spirv(uniform, descriptor_set = 0, binding = 0)] ubo: &UBO,
+    #[spirv(position)] out_position: &mut Vec4,
+    out_color: &mut Vec3,
+) {
+    *out_color = in_color;
+    *out_position = ubo.projection * ubo.model * Vec4::from((in_pos, 1.0));
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    in_color: Vec3,
+    out_frag_color: &mut Vec4,
+) {
+    *out_frag_color = Vec4::new(in_color.x, in_color.y, in_color.z, 1.0);
+}