project: add optional bytemuck dependency to mark structs as Pod

Author: Firestar99

Cargo.lock

@@ -14,6 +14,7 @@ unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spir
 spirv-std-types.workspace = true
 spirv-std-macros.workspace = true
 bitflags = "1.2.1"
+bytemuck = { version = "1.18.0", features = ["derive"], optional = true }
 
 [target.'cfg(target_arch = "spirv")'.dependencies]
 num-traits = { workspace = true, features = ["libm"] }
@@ -25,3 +26,4 @@ glam = { workspace = true, default-features = true }
 
 [features]
 default = []
+bytemuck = ["dep:bytemuck", "glam/bytemuck"]

crates/spirv-std/Cargo.toml

@@ -13,7 +13,9 @@ const SUBGROUP: u32 = Scope::Subgroup as u32;
 
 /// `SubgroupMask` is a [`glam::UVec4`] representing a bitmask of all invocations within a subgroup.
 /// Mostly used in group ballot operations.
+#[repr(transparent)]
 #[derive(Copy, Clone, Default, Eq, PartialEq)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct SubgroupMask(pub glam::UVec4);
 
 /// Defines the class of group operation.

crates/spirv-std/src/arch/subgroup.rs

@@ -13,6 +13,7 @@ pub type DeviceAddress = u64;
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkDrawIndirectCommand.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct DrawIndirectCommand {
     /// vertexCount is the number of vertices to draw.
     pub vertex_count: u32,
@@ -29,6 +30,7 @@ pub struct DrawIndirectCommand {
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkDrawIndexedIndirectCommand.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct DrawIndexedIndirectCommand {
     /// indexCount is the number of vertices to draw.
     pub index_count: u32,
@@ -47,6 +49,7 @@ pub struct DrawIndexedIndirectCommand {
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkDispatchIndirectCommand.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct DispatchIndirectCommand {
     /// x is the number of local workgroups to dispatch in the X dimension.
     pub x: u32,
@@ -81,6 +84,7 @@ impl From<DispatchIndirectCommand> for UVec3 {
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkDrawMeshTasksIndirectCommandEXT.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct DrawMeshTasksIndirectCommandEXT {
     /// groupCountX is the number of local workgroups to dispatch in the X dimension.
     pub group_count_x: u32,
@@ -115,6 +119,7 @@ impl From<DrawMeshTasksIndirectCommandEXT> for UVec3 {
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkTraceRaysIndirectCommandKHR.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
 pub struct TraceRaysIndirectCommandKHR {
     /// width is the width of the ray trace query dimensions.
     pub width: u32,
@@ -149,7 +154,7 @@ impl From<TraceRaysIndirectCommandKHR> for UVec3 {
 /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkTraceRaysIndirectCommand2KHR.html>
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
-#[must_use]
+#[cfg_attr(feature = "bytemuck", derive(bytemuck::AnyBitPattern))]
 pub struct TraceRaysIndirectCommand2KHR {
     /// raygenShaderRecordAddress is a `VkDeviceAddress` of the ray generation shader binding table record used by this command.
     pub raygen_shader_record_address: DeviceAddress,

crates/spirv-std/src/indirect_command.rs

@@ -29,6 +29,7 @@ pub enum Scope {
 bitflags::bitflags! {
     /// Memory semantics to determine how some operations should function - used when calling such
     /// configurable operations.
+    #[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
     pub struct Semantics: u32 {
         /// No memory semantics.
         const NONE = 0;

crates/spirv-std/src/memory.rs

@@ -141,6 +141,7 @@ bitflags::bitflags! {
     /// `NO_OPAQUE`, `CULL_OPAQUE`, `CULL_NO_OPAQUE`, only one of
     /// `CULL_BACK_FACING_TRIANGLES` and `CULL_FRONT_FACING_TRIANGLES` may
     /// be set.
+    #[cfg_attr(feature = "bytemuck", derive(bytemuck::Zeroable, bytemuck::Pod))]
     pub struct RayFlags: u32 {
         /// No flags specified.
         const NONE = 0;

crates/spirv-std/src/ray_tracing.rs

@@ -9,4 +9,4 @@ repository.workspace = true
 
 [dependencies]
 spirv-std = { workspace = true }
-bytemuck = { version = "1.6.3", features = ["derive"] }
+bytemuck = { version = "1.18.0", features = ["derive"] }