extensions/nv: Add VK_NV_memory_decompression (#761)

Changelog.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `Handle::is_null()` to allow checking if a handle is a `NULL` value (#694)
 - Allow building `Entry`/`Instance`/`Device` from handle+fns (see their `from_parts_1_x()` associated functions) (#748)
 - Update Vulkan-Headers to 1.3.254 (#760)
+- Added `VK_NV_memory_decompression` device extension (#761)
 
 ### Changed
 

ash/src/extensions/nv/memory_decompression.rs

@@ -0,0 +1,54 @@
+use crate::{vk, Device, Instance};
+use std::ffi::CStr;
+use std::mem;
+
+/// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_NV_memory_decompression.html>
+#[derive(Clone)]
+pub struct MemoryDecompression {
+    fp: vk::NvMemoryDecompressionFn,
+}
+
+impl MemoryDecompression {
+    pub fn new(instance: &Instance, device: &Device) -> Self {
+        let fp = vk::NvMemoryDecompressionFn::load(|name| unsafe {
+            mem::transmute(instance.get_device_proc_addr(device.handle(), name.as_ptr()))
+        });
+        Self { fp }
+    }
+
+    /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/vkCmdDecompressMemoryNV.html>
+    pub unsafe fn cmd_decompress_memory(
+        &self,
+        command_buffer: vk::CommandBuffer,
+        decompress_memory_regions: &[vk::DecompressMemoryRegionNV],
+    ) {
+        (self.fp.cmd_decompress_memory_nv)(
+            command_buffer,
+            decompress_memory_regions.len() as u32,
+            decompress_memory_regions.as_ptr(),
+        )
+    }
+
+    /// <https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/vkCmdDecompressMemoryIndirectCountNV.html>
+    pub unsafe fn cmd_decompress_memory_indirect_count(
+        &self,
+        command_buffer: vk::CommandBuffer,
+        indirect_commands_address: vk::DeviceAddress,
+        indirect_commands_count_address: vk::DeviceAddress,
+        stride: u32,
+    ) {
+        (self.fp.cmd_decompress_memory_indirect_count_nv)(
+            command_buffer,
+            indirect_commands_address,
+            indirect_commands_count_address,
+            stride,
+        )
+    }
+
+    pub const NAME: &'static CStr = vk::NvMemoryDecompressionFn::NAME;
+
+    #[inline]
+    pub fn fp(&self) -> &vk::NvMemoryDecompressionFn {
+        &self.fp
+    }
+}

ash/src/extensions/nv/mod.rs

@@ -1,9 +1,11 @@
 pub use self::coverage_reduction_mode::CoverageReductionMode;
 pub use self::device_diagnostic_checkpoints::DeviceDiagnosticCheckpoints;
+pub use self::memory_decompression::MemoryDecompression;
 pub use self::mesh_shader::MeshShader;
 pub use self::ray_tracing::RayTracing;
 
 mod coverage_reduction_mode;
 mod device_diagnostic_checkpoints;
+mod memory_decompression;
 mod mesh_shader;
 mod ray_tracing;