Vendor dependencies for 0.3.0 release

vendor/metal/src/acceleration_structure.rs

@@ -0,0 +1,667 @@
+// Copyright 2023 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+bitflags::bitflags! {
+    #[derive(Copy, Clone, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLAccelerationStructureInstanceOptions: u32 {
+        const None = 0;
+        const DisableTriangleCulling = (1 << 0);
+        const TriangleFrontFacingWindingCounterClockwise = (1 << 1);
+        const Opaque = (1 << 2);
+        const NonOpaque = (1 << 3);
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlaccelerationstructureinstancedescriptortype>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum MTLAccelerationStructureInstanceDescriptorType {
+    Default = 0,
+    UserID = 1,
+    Motion = 2,
+    Indirect = 3,
+}
+
+#[derive(Clone, Copy, PartialEq, Debug, Default)]
+#[repr(C)]
+pub struct MTLAccelerationStructureInstanceDescriptor {
+    pub transformation_matrix: [[f32; 3]; 4],
+    pub options: MTLAccelerationStructureInstanceOptions,
+    pub mask: u32,
+    pub intersection_function_table_offset: u32,
+    pub acceleration_structure_index: u32,
+}
+
+#[derive(Clone, Copy, PartialEq, Debug, Default)]
+#[repr(C)]
+pub struct MTLAccelerationStructureUserIDInstanceDescriptor {
+    pub transformation_matrix: [[f32; 3]; 4],
+    pub options: MTLAccelerationStructureInstanceOptions,
+    pub mask: u32,
+    pub intersection_function_table_offset: u32,
+    pub acceleration_structure_index: u32,
+    pub user_id: u32,
+}
+
+#[derive(Clone, Copy, PartialEq, Debug, Default)]
+#[repr(C)]
+pub struct MTLIndirectAccelerationStructureInstanceDescriptor {
+    pub transformation_matrix: [[f32; 3]; 4],
+    pub options: MTLAccelerationStructureInstanceOptions,
+    pub mask: u32,
+    pub intersection_function_table_offset: u32,
+    pub user_id: u32,
+    pub acceleration_structure_id: u64,
+}
+
+pub enum MTLAccelerationStructureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructureDescriptor;
+    pub struct AccelerationStructureDescriptor;
+    type ParentType = NsObject;
+}
+
+pub enum MTLPrimitiveAccelerationStructureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLPrimitiveAccelerationStructureDescriptor;
+    pub struct PrimitiveAccelerationStructureDescriptor;
+    type ParentType = AccelerationStructureDescriptor;
+}
+
+impl PrimitiveAccelerationStructureDescriptor {
+    pub fn descriptor() -> Self {
+        unsafe {
+            let class = class!(MTLPrimitiveAccelerationStructureDescriptor);
+            let ptr: *mut Object = msg_send![class, descriptor];
+            let ptr: *mut Object = msg_send![ptr, retain];
+            Self::from_ptr(ptr as _)
+        }
+    }
+}
+
+impl PrimitiveAccelerationStructureDescriptorRef {
+    pub fn set_geometry_descriptors(
+        &self,
+        descriptors: &ArrayRef<AccelerationStructureGeometryDescriptor>,
+    ) {
+        unsafe { msg_send![self, setGeometryDescriptors: descriptors] }
+    }
+}
+
+pub enum MTLAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructure;
+    pub struct AccelerationStructure;
+    type ParentType = Resource;
+}
+
+impl AccelerationStructureRef {
+    pub fn gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
+}
+
+pub enum MTLAccelerationStructureGeometryDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructureGeometryDescriptor;
+    pub struct AccelerationStructureGeometryDescriptor;
+    type ParentType = NsObject;
+}
+
+impl AccelerationStructureGeometryDescriptorRef {
+    pub fn set_opaque(&self, opaque: bool) {
+        unsafe { msg_send![self, setOpaque: opaque] }
+    }
+    pub fn set_primitive_data_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setPrimitiveDataBuffer: buffer] }
+    }
+
+    pub fn set_primitive_data_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setPrimitiveDataStride: stride] }
+    }
+
+    pub fn set_primitive_data_element_size(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setPrimitiveDataElementSize: size] }
+    }
+
+    pub fn set_intersection_function_table_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setIntersectionFunctionTableOffset: offset] }
+    }
+}
+
+pub enum MTLAccelerationStructureTriangleGeometryDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructureTriangleGeometryDescriptor;
+    pub struct AccelerationStructureTriangleGeometryDescriptor;
+    type ParentType = AccelerationStructureGeometryDescriptor;
+}
+
+impl AccelerationStructureTriangleGeometryDescriptor {
+    pub fn descriptor() -> Self {
+        unsafe {
+            let class = class!(MTLAccelerationStructureTriangleGeometryDescriptor);
+            let ptr: *mut Object = msg_send![class, descriptor];
+            let ptr: *mut Object = msg_send![ptr, retain];
+            Self::from_ptr(ptr as _)
+        }
+    }
+}
+
+impl AccelerationStructureTriangleGeometryDescriptorRef {
+    pub fn set_index_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setIndexBuffer: buffer] }
+    }
+
+    pub fn set_index_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setIndexBufferOffset: offset] }
+    }
+
+    pub fn set_index_type(&self, t: MTLIndexType) {
+        unsafe { msg_send![self, setIndexType: t] }
+    }
+
+    pub fn set_vertex_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setVertexBuffer: buffer] }
+    }
+
+    pub fn set_vertex_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setVertexBufferOffset: offset] }
+    }
+
+    pub fn set_vertex_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setVertexStride: stride] }
+    }
+
+    pub fn set_triangle_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setTriangleCount: count] }
+    }
+
+    pub fn set_vertex_format(&self, format: MTLAttributeFormat) {
+        unsafe { msg_send![self, setVertexFormat: format] }
+    }
+
+    pub fn set_transformation_matrix_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setTransformationMatrixBuffer: buffer] }
+    }
+
+    pub fn set_transformation_matrix_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setTransformationMatrixBufferOffset: offset] }
+    }
+}
+
+pub enum MTLAccelerationStructureBoundingBoxGeometryDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructureBoundingBoxGeometryDescriptor;
+    pub struct AccelerationStructureBoundingBoxGeometryDescriptor;
+    type ParentType = AccelerationStructureGeometryDescriptor;
+}
+
+impl AccelerationStructureBoundingBoxGeometryDescriptor {
+    pub fn descriptor() -> Self {
+        unsafe {
+            let class = class!(MTLAccelerationStructureBoundingBoxGeometryDescriptor);
+            let ptr: *mut Object = msg_send![class, descriptor];
+            let ptr: *mut Object = msg_send![ptr, retain];
+            Self::from_ptr(ptr as _)
+        }
+    }
+}
+
+impl AccelerationStructureBoundingBoxGeometryDescriptorRef {
+    pub fn set_bounding_box_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setBoundingBoxBuffer: buffer] }
+    }
+
+    pub fn set_bounding_box_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setBoundingBoxCount: count] }
+    }
+
+    pub fn set_bounding_box_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setBoundingBoxStride: stride] }
+    }
+
+    pub fn set_bounding_box_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setBoundingBoxBufferOffset: offset] }
+    }
+}
+
+pub enum MTLInstanceAccelerationStructureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLInstanceAccelerationStructureDescriptor;
+    pub struct InstanceAccelerationStructureDescriptor;
+    type ParentType = AccelerationStructureDescriptor;
+}
+
+impl InstanceAccelerationStructureDescriptor {
+    pub fn descriptor() -> Self {
+        unsafe {
+            let class = class!(MTLInstanceAccelerationStructureDescriptor);
+            let ptr: *mut Object = msg_send![class, descriptor];
+            let ptr: *mut Object = msg_send![ptr, retain];
+            Self::from_ptr(ptr as _)
+        }
+    }
+}
+
+impl InstanceAccelerationStructureDescriptorRef {
+    pub fn set_instance_descriptor_type(&self, ty: MTLAccelerationStructureInstanceDescriptorType) {
+        unsafe { msg_send![self, setInstanceDescriptorType: ty] }
+    }
+
+    pub fn set_instanced_acceleration_structures(
+        &self,
+        instances: &ArrayRef<AccelerationStructure>,
+    ) {
+        unsafe { msg_send![self, setInstancedAccelerationStructures: instances] }
+    }
+
+    pub fn set_instance_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setInstanceCount: count] }
+    }
+
+    pub fn set_instance_descriptor_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setInstanceDescriptorBuffer: buffer] }
+    }
+
+    pub fn set_instance_descriptor_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setInstanceDescriptorBufferOffset: offset] }
+    }
+
+    pub fn set_instance_descriptor_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setInstanceDescriptorStride: stride] }
+    }
+}
+
+pub enum MTLIndirectInstanceAccelerationStructureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectInstanceAccelerationStructureDescriptor;
+    pub struct IndirectInstanceAccelerationStructureDescriptor;
+    type ParentType = AccelerationStructureDescriptor;
+}
+
+impl IndirectInstanceAccelerationStructureDescriptor {
+    pub fn descriptor() -> Self {
+        unsafe {
+            let class = class!(MTLIndirectInstanceAccelerationStructureDescriptor);
+            let ptr: *mut Object = msg_send![class, descriptor];
+            let ptr: *mut Object = msg_send![ptr, retain];
+            Self::from_ptr(ptr as _)
+        }
+    }
+}
+
+impl IndirectInstanceAccelerationStructureDescriptorRef {
+    pub fn set_instance_descriptor_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setInstanceDescriptorBuffer: buffer] }
+    }
+
+    pub fn set_instance_descriptor_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setInstanceDescriptorBufferOffset: offset] }
+    }
+
+    pub fn set_instance_descriptor_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setInstanceDescriptorStride: stride] }
+    }
+
+    pub fn set_max_instance_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxInstanceCount: count] }
+    }
+
+    pub fn set_instance_count_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setInstanceCountBuffer: buffer] }
+    }
+
+    pub fn set_instance_count_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setInstanceCountBufferOffset: offset] }
+    }
+
+    pub fn set_instance_descriptor_type(&self, ty: MTLAccelerationStructureInstanceDescriptorType) {
+        unsafe { msg_send![self, setInstanceDescriptorType: ty] }
+    }
+
+    pub fn set_motion_transform_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setMotionTransformBuffer: buffer] }
+    }
+
+    pub fn set_motion_transform_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMotionTransformBufferOffset: offset] }
+    }
+
+    pub fn set_max_motion_transform_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxMotionTransformCount: count] }
+    }
+
+    pub fn set_motion_transform_count_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setMotionTransformCountBuffer: buffer] }
+    }
+
+    pub fn set_motion_transform_count_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMotionTransformCountBufferOffset: offset] }
+    }
+}
+
+pub enum MTLAccelerationStructureCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructureCommandEncoder;
+    pub struct  AccelerationStructureCommandEncoder;
+    type ParentType = CommandEncoder;
+}
+
+impl AccelerationStructureCommandEncoderRef {
+    pub fn build_acceleration_structure(
+        &self,
+        acceleration_structure: &self::AccelerationStructureRef,
+        descriptor: &self::AccelerationStructureDescriptorRef,
+        scratch_buffer: &BufferRef,
+        scratch_buffer_offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                buildAccelerationStructure: acceleration_structure
+                descriptor: descriptor
+                scratchBuffer: scratch_buffer
+                scratchBufferOffset: scratch_buffer_offset
+            ]
+        }
+    }
+
+    pub fn copy_acceleration_structure(
+        &self,
+        source_acceleration_structure: &AccelerationStructureRef,
+        destination_acceleration_structure: &AccelerationStructureRef,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                copyAccelerationStructure: source_acceleration_structure
+                toAccelerationStructure: destination_acceleration_structure
+            ]
+        }
+    }
+
+    pub fn write_compacted_acceleration_structure_size(
+        &self,
+        acceleration_structure: &AccelerationStructureRef,
+        to_buffer: &BufferRef,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                writeCompactedAccelerationStructureSize: acceleration_structure
+                toBuffer: to_buffer
+                offset: offset
+            ]
+        }
+    }
+
+    pub fn write_compacted_acceleration_structure_size_with_type(
+        &self,
+        acceleration_structure: &AccelerationStructureRef,
+        to_buffer: &BufferRef,
+        offset: NSUInteger,
+        size_data_type: MTLDataType,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                writeCompactedAccelerationStructureSize: acceleration_structure
+                toBuffer: to_buffer
+                offset: offset
+                sizeDataType: size_data_type
+            ]
+        }
+    }
+
+    pub fn copy_and_compact_acceleration_structure(
+        &self,
+        source: &AccelerationStructureRef,
+        destination: &AccelerationStructureRef,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                copyAndCompactAccelerationStructure: source
+                toAccelerationStructure: destination
+            ]
+        }
+    }
+
+    pub fn refit_acceleration_structure(
+        &self,
+        source_acceleration_structure: &AccelerationStructureRef,
+        descriptor: &self::AccelerationStructureDescriptorRef,
+        destination_acceleration_structure: Option<&AccelerationStructureRef>,
+        scratch_buffer: &BufferRef,
+        scratch_buffer_offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                refitAccelerationStructure: source_acceleration_structure
+                descriptor: descriptor
+                destination: destination_acceleration_structure
+                scratchBuffer: scratch_buffer
+                scratchBufferOffset: scratch_buffer_offset
+            ]
+        }
+    }
+
+    pub fn update_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, updateFence: fence] }
+    }
+
+    pub fn wait_for_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, waitForFence: fence] }
+    }
+
+    pub fn use_heap(&self, heap: &HeapRef) {
+        unsafe { msg_send![self, useHeap: heap] }
+    }
+
+    pub fn use_heaps(&self, heaps: &[&HeapRef]) {
+        unsafe {
+            msg_send![self,
+                useHeaps: heaps.as_ptr()
+                count: heaps.len() as NSUInteger
+            ]
+        }
+    }
+
+    pub fn use_resource(&self, resource: &ResourceRef, usage: MTLResourceUsage) {
+        unsafe {
+            msg_send![self,
+                useResource: resource
+                usage: usage
+            ]
+        }
+    }
+
+    pub fn use_resources(&self, resources: &[&ResourceRef], usage: MTLResourceUsage) {
+        unsafe {
+            msg_send![self,
+                useResources: resources.as_ptr()
+                count: resources.len() as NSUInteger
+                usage: usage
+            ]
+        }
+    }
+
+    pub fn sample_counters_in_buffer(
+        &self,
+        sample_buffer: &CounterSampleBufferRef,
+        sample_index: NSUInteger,
+        with_barrier: bool,
+    ) {
+        unsafe {
+            msg_send![self,
+                sampleCountersInBuffer: sample_buffer
+                atSampleIndex: sample_index
+                withBarrier: with_barrier
+            ]
+        }
+    }
+}
+
+pub enum MTLIntersectionFunctionTableDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIntersectionFunctionTableDescriptor;
+    pub struct IntersectionFunctionTableDescriptor;
+    type ParentType = NsObject;
+}
+
+impl IntersectionFunctionTableDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLIntersectionFunctionTableDescriptor);
+            let this: *mut <Self as ForeignType>::CType = msg_send![class, alloc];
+            msg_send![this, init]
+        }
+    }
+}
+
+impl IntersectionFunctionTableDescriptorRef {
+    pub fn set_function_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setFunctionCount: count] }
+    }
+}
+
+pub enum MTLIntersectionFunctionTable {}
+
+foreign_obj_type! {
+    type CType = MTLIntersectionFunctionTable;
+    pub struct IntersectionFunctionTable;
+    type ParentType = Resource;
+}
+
+impl IntersectionFunctionTableRef {
+    pub fn set_function(&self, function: &FunctionHandleRef, index: NSUInteger) {
+        unsafe { msg_send![self, setFunction: function atIndex: index] }
+    }
+
+    pub fn set_functions(&self, functions: &[&FunctionHandleRef], start_index: NSUInteger) {
+        unsafe {
+            msg_send![self, setFunctions: functions.as_ptr() withRange: NSRange { location: start_index, length: functions.len() as _ }]
+        }
+    }
+
+    pub fn set_buffer(&self, index: NSUInteger, buffer: Option<&BufferRef>, offset: NSUInteger) {
+        unsafe { msg_send![self, setBuffer:buffer offset:offset atIndex:index] }
+    }
+
+    pub fn set_buffers(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&BufferRef>],
+        offsets: &[NSUInteger],
+    ) {
+        debug_assert_eq!(offsets.len(), data.len());
+        unsafe {
+            msg_send![self,
+            setBuffers: data.as_ptr()
+            offsets: offsets.as_ptr()
+            withRange: NSRange {
+                location: start_index,
+                length: data.len() as _,
+            }
+            ]
+        }
+    }
+
+    pub fn set_visible_function_table(
+        &self,
+        buffer_index: NSUInteger,
+        visible_function_table: Option<&VisibleFunctionTableRef>,
+    ) {
+        unsafe {
+            msg_send![self,
+            setVisibleFunctionTable:visible_function_table
+            atBufferIndex:buffer_index]
+        }
+    }
+
+    pub fn set_visible_function_tables(
+        &self,
+        buffer_start_index: NSUInteger,
+        visible_function_tables: &[&VisibleFunctionTableRef],
+    ) {
+        unsafe {
+            msg_send![self,
+            setVisibleFunctionTables:visible_function_tables.as_ptr()
+            withBufferRange: NSRange {
+                location: buffer_start_index,
+                length: visible_function_tables.len() as _,
+            }]
+        }
+    }
+
+    pub fn gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvisiblefunctiontabledescriptor>
+pub enum MTLVisibleFunctionTableDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVisibleFunctionTableDescriptor;
+    pub struct VisibleFunctionTableDescriptor;
+    type ParentType = NsObject;
+}
+
+impl VisibleFunctionTableDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLVisibleFunctionTableDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl VisibleFunctionTableDescriptorRef {
+    pub fn set_function_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setFunctionCount: count] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvisiblefunctiontable>
+pub enum MTLVisibleFunctionTable {}
+
+foreign_obj_type! {
+    type CType = MTLVisibleFunctionTable;
+    pub struct VisibleFunctionTable;
+    type ParentType = Resource;
+}
+
+impl VisibleFunctionTableRef {
+    pub fn set_functions(&self, functions: &[&FunctionRef]) {
+        let ns_array = Array::<Function>::from_slice(functions);
+        unsafe { msg_send![self, setFunctions: ns_array] }
+    }
+
+    pub fn set_function(&self, index: NSUInteger, function: &FunctionHandleRef) {
+        unsafe { msg_send![self, setFunction: function atIndex: index] }
+    }
+
+    pub fn gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
+}

vendor/metal/src/acceleration_structure_pass.rs

@@ -0,0 +1,108 @@
+use super::{CounterSampleBufferRef, NSUInteger};
+
+/// See <https://developer.apple.com/documentation/metal/mtlaccelerationstructurepassdescriptor>
+pub enum MTLAccelerationStructurePassDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructurePassDescriptor;
+    pub struct AccelerationStructurePassDescriptor;
+}
+
+impl AccelerationStructurePassDescriptor {
+    /// Creates a default compute pass descriptor with no attachments.
+    pub fn new<'a>() -> &'a AccelerationStructurePassDescriptorRef {
+        unsafe {
+            msg_send![
+                class!(MTLAccelerationStructurePassDescriptor),
+                accelerationStructurePassDescriptor
+            ]
+        }
+    }
+}
+
+impl AccelerationStructurePassDescriptorRef {
+    pub fn sample_buffer_attachments(
+        &self,
+    ) -> &AccelerationStructurePassSampleBufferAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, sampleBufferAttachments] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlaccelerationstructurepasssamplebufferattachmentdescriptorarray>
+pub enum MTLAccelerationStructurePassSampleBufferAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructurePassSampleBufferAttachmentDescriptorArray;
+    pub struct AccelerationStructurePassSampleBufferAttachmentDescriptorArray;
+}
+
+impl AccelerationStructurePassSampleBufferAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&AccelerationStructurePassSampleBufferAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&AccelerationStructurePassSampleBufferAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlaccelerationstructurepasssamplebufferattachmentdescriptor>
+pub enum MTLAccelerationStructurePassSampleBufferAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAccelerationStructurePassSampleBufferAttachmentDescriptor;
+    pub struct AccelerationStructurePassSampleBufferAttachmentDescriptor;
+}
+
+impl AccelerationStructurePassSampleBufferAttachmentDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLAccelerationStructurePassSampleBufferAttachmentDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl AccelerationStructurePassSampleBufferAttachmentDescriptorRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
+        unsafe { msg_send![self, sampleBuffer] }
+    }
+
+    pub fn set_sample_buffer(&self, sample_buffer: &CounterSampleBufferRef) {
+        unsafe { msg_send![self, setSampleBuffer: sample_buffer] }
+    }
+
+    pub fn start_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, startOfEncoderSampleIndex] }
+    }
+
+    pub fn set_start_of_encoder_sample_index(&self, start_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setStartOfEncoderSampleIndex: start_of_encoder_sample_index
+            ]
+        }
+    }
+
+    pub fn end_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, endOfEncoderSampleIndex] }
+    }
+
+    pub fn set_end_of_encoder_sample_index(&self, end_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setEndOfEncoderSampleIndex: end_of_encoder_sample_index
+            ]
+        }
+    }
+}

vendor/metal/src/argument.rs

@@ -0,0 +1,366 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::{MTLTextureType, NSUInteger};
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtldatatype>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDataType {
+    None = 0,
+
+    Struct = 1,
+    Array = 2,
+
+    Float = 3,
+    Float2 = 4,
+    Float3 = 5,
+    Float4 = 6,
+
+    Float2x2 = 7,
+    Float2x3 = 8,
+    Float2x4 = 9,
+
+    Float3x2 = 10,
+    Float3x3 = 11,
+    Float3x4 = 12,
+
+    Float4x2 = 13,
+    Float4x3 = 14,
+    Float4x4 = 15,
+
+    Half = 16,
+    Half2 = 17,
+    Half3 = 18,
+    Half4 = 19,
+
+    Half2x2 = 20,
+    Half2x3 = 21,
+    Half2x4 = 22,
+
+    Half3x2 = 23,
+    Half3x3 = 24,
+    Half3x4 = 25,
+
+    Half4x2 = 26,
+    Half4x3 = 27,
+    Half4x4 = 28,
+
+    Int = 29,
+    Int2 = 30,
+    Int3 = 31,
+    Int4 = 32,
+
+    UInt = 33,
+    UInt2 = 34,
+    UInt3 = 35,
+    UInt4 = 36,
+
+    Short = 37,
+    Short2 = 38,
+    Short3 = 39,
+    Short4 = 40,
+
+    UShort = 41,
+    UShort2 = 42,
+    UShort3 = 43,
+    UShort4 = 44,
+
+    Char = 45,
+    Char2 = 46,
+    Char3 = 47,
+    Char4 = 48,
+
+    UChar = 49,
+    UChar2 = 50,
+    UChar3 = 51,
+    UChar4 = 52,
+
+    Bool = 53,
+    Bool2 = 54,
+    Bool3 = 55,
+    Bool4 = 56,
+
+    Texture = 58,
+    Sampler = 59,
+    Pointer = 60,
+    R8Unorm = 62,
+    R8Snorm = 63,
+    R16Unorm = 64,
+    R16Snorm = 65,
+    RG8Unorm = 66,
+    RG8Snorm = 67,
+    RG16Unorm = 68,
+    RG16Snorm = 69,
+    RGBA8Unorm = 70,
+    RGBA8Unorm_sRGB = 71,
+    RGBA8Snorm = 72,
+    RGBA16Unorm = 73,
+    RGBA16Snorm = 74,
+    RGB10A2Unorm = 75,
+    RG11B10Float = 76,
+    RGB9E5Float = 77,
+
+    RenderPipeline = 78,
+    ComputePipeline = 79,
+    IndirectCommandBuffer = 80,
+
+    Long = 81,
+    Long2 = 82,
+    Long3 = 83,
+    Long4 = 84,
+
+    ULong = 85,
+    ULong2 = 86,
+    ULong3 = 87,
+    ULong4 = 88,
+
+    VisibleFunctionTable = 115,
+    IntersectionFunctionTable = 116,
+    PrimitiveAccelerationStructure = 117,
+    InstanceAccelerationStructure = 118,
+
+    BFloat = 121,
+    BFloat2 = 122,
+    BFloat3 = 123,
+    BFloat4 = 124,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlargumenttype>
+#[repr(u64)]
+#[deprecated(
+    note = "Since: iOS 8.0–16.0, iPadOS 8.0–16.0, macOS 10.11–13.0, Mac Catalyst 13.1–16.0, tvOS 9.0–16.0"
+)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLArgumentType {
+    Buffer = 0,
+    ThreadgroupMemory = 1,
+    Texture = 2,
+    Sampler = 3,
+    ImageblockData = 16,
+    Imageblock = 17,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlargumentaccess>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLArgumentAccess {
+    ReadOnly = 0,
+    ReadWrite = 1,
+    WriteOnly = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstructmember>
+pub enum MTLStructMember {}
+
+foreign_obj_type! {
+    type CType = MTLStructMember;
+    pub struct StructMember;
+}
+
+impl StructMemberRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, dataType] }
+    }
+
+    pub fn struct_type(&self) -> MTLStructType {
+        unsafe { msg_send![self, structType] }
+    }
+
+    pub fn array_type(&self) -> MTLArrayType {
+        unsafe { msg_send![self, arrayType] }
+    }
+}
+
+pub enum MTLStructMemberArray {}
+
+foreign_obj_type! {
+    type CType = MTLStructMemberArray;
+    pub struct StructMemberArray;
+}
+
+impl StructMemberArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&StructMemberRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn count(&self) -> NSUInteger {
+        unsafe { msg_send![self, count] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstructtype>
+pub enum MTLStructType {}
+
+foreign_obj_type! {
+    type CType = MTLStructType;
+    pub struct StructType;
+}
+
+impl StructTypeRef {
+    pub fn members(&self) -> &StructMemberArrayRef {
+        unsafe { msg_send![self, members] }
+    }
+
+    pub fn member_from_name(&self, name: &str) -> Option<&StructMemberRef> {
+        let nsname = crate::nsstring_from_str(name);
+
+        unsafe { msg_send![self, memberByName: nsname] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlarraytype>
+pub enum MTLArrayType {}
+
+foreign_obj_type! {
+    type CType = MTLArrayType;
+    pub struct ArrayType;
+}
+
+impl ArrayTypeRef {
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn element_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, elementType] }
+    }
+
+    pub fn element_struct_type(&self) -> MTLStructType {
+        unsafe { msg_send![self, elementStructType] }
+    }
+
+    pub fn element_array_type(&self) -> MTLArrayType {
+        unsafe { msg_send![self, elementArrayType] }
+    }
+}
+
+/// <https://developer.apple.com/documentation/metal/mtlargument>
+#[deprecated(
+    note = "Since iOS 8.0–16.0, iPadOS 8.0–16.0, macOS 10.11–13.0, Mac Catalyst 13.1–16.0, tvOS 9.0–16.0"
+)]
+pub enum MTLArgument {}
+
+foreign_obj_type! {
+    type CType = MTLArgument;
+    pub struct Argument;
+}
+
+impl ArgumentRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn type_(&self) -> MTLArgumentType {
+        unsafe { msg_send![self, type] }
+    }
+
+    pub fn access(&self) -> MTLArgumentAccess {
+        unsafe { msg_send![self, access] }
+    }
+
+    pub fn index(&self) -> NSUInteger {
+        unsafe { msg_send![self, index] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe { msg_send_bool![self, isActive] }
+    }
+
+    pub fn buffer_alignment(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferAlignment] }
+    }
+
+    pub fn buffer_data_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferDataSize] }
+    }
+
+    pub fn buffer_data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, bufferDataType] }
+    }
+
+    pub fn buffer_struct_type(&self) -> &StructTypeRef {
+        unsafe { msg_send![self, bufferStructType] }
+    }
+
+    pub fn threadgroup_memory_alignment(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadgroupMemoryAlignment] }
+    }
+
+    pub fn threadgroup_memory_data_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadgroupMemoryDataSize] }
+    }
+
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn texture_data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, textureDataType] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlargumentdescriptor>
+pub enum MTLArgumentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLArgumentDescriptor;
+    pub struct ArgumentDescriptor;
+}
+
+impl ArgumentDescriptor {
+    pub fn new<'a>() -> &'a ArgumentDescriptorRef {
+        unsafe {
+            let class = class!(MTLArgumentDescriptor);
+            msg_send![class, argumentDescriptor]
+        }
+    }
+}
+
+impl ArgumentDescriptorRef {
+    pub fn set_data_type(&self, ty: MTLDataType) {
+        unsafe { msg_send![self, setDataType: ty] }
+    }
+
+    pub fn set_index(&self, index: NSUInteger) {
+        unsafe { msg_send![self, setIndex: index] }
+    }
+
+    pub fn set_access(&self, access: MTLArgumentAccess) {
+        unsafe { msg_send![self, setAccess: access] }
+    }
+
+    pub fn set_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setArrayLength: length] }
+    }
+
+    pub fn set_texture_type(&self, ty: MTLTextureType) {
+        unsafe { msg_send![self, setTextureType: ty] }
+    }
+}

vendor/metal/src/blitpass.rs

@@ -0,0 +1,102 @@
+use super::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlblitpassdescriptor>
+pub enum MTLBlitPassDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBlitPassDescriptor;
+    pub struct BlitPassDescriptor;
+}
+
+impl BlitPassDescriptor {
+    /// Creates a default blit command pass descriptor with no attachments.
+    pub fn new<'a>() -> &'a BlitPassDescriptorRef {
+        unsafe { msg_send![class!(MTLBlitPassDescriptor), blitPassDescriptor] }
+    }
+}
+
+impl BlitPassDescriptorRef {
+    // See <https://developer.apple.com/documentation/metal/mtlblitpassdescriptor>
+    pub fn sample_buffer_attachments(&self) -> &BlitPassSampleBufferAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, sampleBufferAttachments] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlblitpasssamplebufferattachmentdescriptorarray>
+pub enum MTLBlitPassSampleBufferAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLBlitPassSampleBufferAttachmentDescriptorArray;
+    pub struct BlitPassSampleBufferAttachmentDescriptorArray;
+}
+
+impl BlitPassSampleBufferAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&BlitPassSampleBufferAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&BlitPassSampleBufferAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlblitpasssamplebufferattachmentdescriptor>
+pub enum MTLBlitPassSampleBufferAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBlitPassSampleBufferAttachmentDescriptor;
+    pub struct BlitPassSampleBufferAttachmentDescriptor;
+}
+
+impl BlitPassSampleBufferAttachmentDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLBlitPassSampleBufferAttachmentDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl BlitPassSampleBufferAttachmentDescriptorRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
+        unsafe { msg_send![self, sampleBuffer] }
+    }
+
+    pub fn set_sample_buffer(&self, sample_buffer: &CounterSampleBufferRef) {
+        unsafe { msg_send![self, setSampleBuffer: sample_buffer] }
+    }
+
+    pub fn start_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, startOfEncoderSampleIndex] }
+    }
+
+    pub fn set_start_of_encoder_sample_index(&self, start_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setStartOfEncoderSampleIndex: start_of_encoder_sample_index
+            ]
+        }
+    }
+
+    pub fn end_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, endOfEncoderSampleIndex] }
+    }
+
+    pub fn set_end_of_encoder_sample_index(&self, end_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setEndOfEncoderSampleIndex: end_of_encoder_sample_index
+            ]
+        }
+    }
+}

vendor/metal/src/buffer.rs

@@ -0,0 +1,71 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlbuffer>
+pub enum MTLBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLBuffer;
+    pub struct Buffer;
+    type ParentType = Resource;
+}
+
+impl BufferRef {
+    pub fn length(&self) -> u64 {
+        unsafe { msg_send![self, length] }
+    }
+
+    pub fn contents(&self) -> *mut std::ffi::c_void {
+        unsafe { msg_send![self, contents] }
+    }
+
+    pub fn did_modify_range(&self, range: crate::NSRange) {
+        unsafe { msg_send![self, didModifyRange: range] }
+    }
+
+    pub fn new_texture_with_descriptor(
+        &self,
+        descriptor: &TextureDescriptorRef,
+        offset: u64,
+        bytes_per_row: u64,
+    ) -> Texture {
+        unsafe {
+            msg_send![self,
+                newTextureWithDescriptor:descriptor
+                offset:offset
+                bytesPerRow:bytes_per_row
+            ]
+        }
+    }
+
+    /// Only available on macos(10.15), NOT available on (ios)
+    pub fn remote_storage_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, remoteStorageBuffer] }
+    }
+
+    /// Only available on (macos(10.15), NOT available on (ios)
+    pub fn new_remote_buffer_view_for_device(&self, device: &DeviceRef) -> Buffer {
+        unsafe { msg_send![self, newRemoteBufferViewForDevice: device] }
+    }
+
+    pub fn add_debug_marker(&self, name: &str, range: crate::NSRange) {
+        unsafe {
+            let name = crate::nsstring_from_str(name);
+            msg_send![self, addDebugMarker:name range:range]
+        }
+    }
+
+    pub fn remove_all_debug_markers(&self) {
+        unsafe { msg_send![self, removeAllDebugMarkers] }
+    }
+
+    pub fn gpu_address(&self) -> u64 {
+        unsafe { msg_send![self, gpuAddress] }
+    }
+}

vendor/metal/src/capturedescriptor.rs

@@ -0,0 +1,76 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use std::path::Path;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcapturedestination?language=objc>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCaptureDestination {
+    DeveloperTools = 1,
+    GpuTraceDocument = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor>
+pub enum MTLCaptureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureDescriptor;
+    pub struct CaptureDescriptor;
+}
+
+impl CaptureDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLCaptureDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl CaptureDescriptorRef {
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject>
+    pub fn set_capture_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, setCaptureObject: device] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject>
+    pub fn set_capture_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, setCaptureObject: scope] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject>
+    pub fn set_capture_command_queue(&self, command_queue: &CommandQueueRef) {
+        unsafe { msg_send![self, setCaptureObject: command_queue] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237250-outputurl>
+    pub fn output_url(&self) -> &Path {
+        let url: &URLRef = unsafe { msg_send![self, outputURL] };
+        Path::new(url.path())
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237250-outputurl>
+    pub fn set_output_url<P: AsRef<Path>>(&self, output_url: P) {
+        let output_url_string = String::from("file://") + output_url.as_ref().to_str().unwrap();
+        let output_url = URL::new_with_string(&output_url_string);
+        unsafe { msg_send![self, setOutputURL: output_url] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor?language=objc>
+    pub fn destination(&self) -> MTLCaptureDestination {
+        unsafe { msg_send![self, destination] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturedescriptor?language=objc>
+    pub fn set_destination(&self, destination: MTLCaptureDestination) {
+        unsafe { msg_send![self, setDestination: destination] }
+    }
+}

vendor/metal/src/capturemanager.rs

@@ -0,0 +1,113 @@
+// Copyright 2018 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+use std::ffi::CStr;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcapturescope>
+pub enum MTLCaptureScope {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureScope;
+    pub struct CaptureScope;
+}
+
+impl CaptureScopeRef {
+    pub fn begin_scope(&self) {
+        unsafe { msg_send![self, beginScope] }
+    }
+
+    pub fn end_scope(&self) {
+        unsafe { msg_send![self, endScope] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcapturemanager>
+pub enum MTLCaptureManager {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureManager;
+    pub struct CaptureManager;
+}
+
+impl CaptureManager {
+    pub fn shared<'a>() -> &'a CaptureManagerRef {
+        unsafe {
+            let class = class!(MTLCaptureManager);
+            msg_send![class, sharedCaptureManager]
+        }
+    }
+}
+
+impl CaptureManagerRef {
+    pub fn new_capture_scope_with_device(&self, device: &DeviceRef) -> CaptureScope {
+        unsafe { msg_send![self, newCaptureScopeWithDevice: device] }
+    }
+
+    pub fn new_capture_scope_with_command_queue(
+        &self,
+        command_queue: &CommandQueueRef,
+    ) -> CaptureScope {
+        unsafe { msg_send![self, newCaptureScopeWithCommandQueue: command_queue] }
+    }
+
+    pub fn default_capture_scope(&self) -> Option<&CaptureScopeRef> {
+        unsafe { msg_send![self, defaultCaptureScope] }
+    }
+
+    pub fn set_default_capture_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, setDefaultCaptureScope: scope] }
+    }
+
+    /// Starts capturing with the capture session defined by a descriptor object.
+    ///
+    /// This function will panic if Metal capture is not enabled.  Capture can be enabled by
+    /// either:
+    ///   1. Running from Xcode
+    ///   2. Setting the environment variable `METAL_CAPTURE_ENABLED=1`
+    ///   3. Adding an info.plist file containing the `MetalCaptureEnabled` key set to `YES`
+    pub fn start_capture(&self, descriptor: &CaptureDescriptorRef) -> Result<(), String> {
+        unsafe {
+            Ok(try_objc! { err =>
+                msg_send![self, startCaptureWithDescriptor: descriptor
+                                error: &mut err]
+            })
+        }
+    }
+
+    pub fn start_capture_with_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, startCaptureWithDevice: device] }
+    }
+
+    pub fn start_capture_with_command_queue(&self, command_queue: &CommandQueueRef) {
+        unsafe { msg_send![self, startCaptureWithCommandQueue: command_queue] }
+    }
+
+    pub fn start_capture_with_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, startCaptureWithScope: scope] }
+    }
+
+    pub fn stop_capture(&self) {
+        unsafe { msg_send![self, stopCapture] }
+    }
+
+    pub fn is_capturing(&self) -> bool {
+        unsafe { msg_send![self, isCapturing] }
+    }
+
+    /// See <https://developer.apple.com/documentation/metal/mtlcapturemanager/3237260-supportsdestination?language=objc>
+    pub fn supports_destination(&self, destination: MTLCaptureDestination) -> bool {
+        unsafe { msg_send![self, supportsDestination: destination] }
+    }
+}

vendor/metal/src/commandbuffer.rs

@@ -0,0 +1,192 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use block::Block;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommandbufferstatus>
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCommandBufferStatus {
+    NotEnqueued = 0,
+    Enqueued = 1,
+    Committed = 2,
+    Scheduled = 3,
+    Completed = 4,
+    Error = 5,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommandbuffererror>
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCommandBufferError {
+    None = 0,
+    Internal = 1,
+    Timeout = 2,
+    PageFault = 3,
+    Blacklisted = 4,
+    NotPermitted = 7,
+    OutOfMemory = 8,
+    InvalidResource = 9,
+    Memoryless = 10,
+    DeviceRemoved = 11,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtldispatchtype>
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDispatchType {
+    Serial = 0,
+    Concurrent = 1,
+}
+
+type CommandBufferHandler<'a> = Block<(&'a CommandBufferRef,), ()>;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommandbuffer>.
+pub enum MTLCommandBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLCommandBuffer;
+    pub struct CommandBuffer;
+}
+
+impl CommandBufferRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn enqueue(&self) {
+        unsafe { msg_send![self, enqueue] }
+    }
+
+    pub fn commit(&self) {
+        unsafe { msg_send![self, commit] }
+    }
+
+    pub fn status(&self) -> MTLCommandBufferStatus {
+        unsafe { msg_send![self, status] }
+    }
+
+    pub fn present_drawable(&self, drawable: &DrawableRef) {
+        unsafe { msg_send![self, presentDrawable: drawable] }
+    }
+
+    pub fn wait_until_completed(&self) {
+        unsafe { msg_send![self, waitUntilCompleted] }
+    }
+
+    pub fn wait_until_scheduled(&self) {
+        unsafe { msg_send![self, waitUntilScheduled] }
+    }
+
+    pub fn add_completed_handler(&self, block: &CommandBufferHandler) {
+        unsafe { msg_send![self, addCompletedHandler: block] }
+    }
+
+    pub fn add_scheduled_handler(&self, block: &CommandBufferHandler) {
+        unsafe { msg_send![self, addScheduledHandler: block] }
+    }
+
+    pub fn new_blit_command_encoder(&self) -> &BlitCommandEncoderRef {
+        unsafe { msg_send![self, blitCommandEncoder] }
+    }
+
+    pub fn blit_command_encoder_with_descriptor(
+        &self,
+        descriptor: &BlitPassDescriptorRef,
+    ) -> &BlitCommandEncoderRef {
+        unsafe { msg_send![self, blitCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn new_compute_command_encoder(&self) -> &ComputeCommandEncoderRef {
+        unsafe { msg_send![self, computeCommandEncoder] }
+    }
+
+    pub fn compute_command_encoder_with_dispatch_type(
+        &self,
+        ty: MTLDispatchType,
+    ) -> &ComputeCommandEncoderRef {
+        unsafe { msg_send![self, computeCommandEncoderWithDispatchType: ty] }
+    }
+
+    pub fn compute_command_encoder_with_descriptor(
+        &self,
+        descriptor: &ComputePassDescriptorRef,
+    ) -> &ComputeCommandEncoderRef {
+        unsafe { msg_send![self, computeCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn new_render_command_encoder(
+        &self,
+        descriptor: &RenderPassDescriptorRef,
+    ) -> &RenderCommandEncoderRef {
+        unsafe { msg_send![self, renderCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn new_parallel_render_command_encoder(
+        &self,
+        descriptor: &RenderPassDescriptorRef,
+    ) -> &ParallelRenderCommandEncoderRef {
+        unsafe { msg_send![self, parallelRenderCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn new_acceleration_structure_command_encoder(
+        &self,
+    ) -> &AccelerationStructureCommandEncoderRef {
+        unsafe { msg_send![self, accelerationStructureCommandEncoder] }
+    }
+
+    pub fn acceleration_structure_command_encoder_with_descriptor(
+        &self,
+        descriptor: &AccelerationStructurePassDescriptorRef,
+    ) -> &AccelerationStructureCommandEncoderRef {
+        unsafe { msg_send![self, accelerationStructureCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn encode_signal_event(&self, event: &EventRef, new_value: u64) {
+        unsafe {
+            msg_send![self,
+                encodeSignalEvent: event
+                value: new_value
+            ]
+        }
+    }
+
+    pub fn encode_wait_for_event(&self, event: &EventRef, value: u64) {
+        unsafe {
+            msg_send![self,
+                encodeWaitForEvent: event
+                value: value
+            ]
+        }
+    }
+
+    pub fn push_debug_group(&self, name: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(name);
+            msg_send![self, pushDebugGroup: nslabel]
+        }
+    }
+
+    pub fn pop_debug_group(&self) {
+        unsafe { msg_send![self, popDebugGroup] }
+    }
+}

vendor/metal/src/commandqueue.rs

@@ -0,0 +1,44 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommandqueue>.
+pub enum MTLCommandQueue {}
+
+foreign_obj_type! {
+    type CType = MTLCommandQueue;
+    pub struct CommandQueue;
+}
+
+impl CommandQueueRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn new_command_buffer(&self) -> &CommandBufferRef {
+        unsafe { msg_send![self, commandBuffer] }
+    }
+
+    pub fn new_command_buffer_with_unretained_references(&self) -> &CommandBufferRef {
+        unsafe { msg_send![self, commandBufferWithUnretainedReferences] }
+    }
+
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}

vendor/metal/src/computepass.rs

@@ -0,0 +1,107 @@
+use super::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepassdescriptor>
+pub enum MTLComputePassDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLComputePassDescriptor;
+    pub struct ComputePassDescriptor;
+}
+
+impl ComputePassDescriptor {
+    /// Creates a default compute pass descriptor with no attachments.
+    pub fn new<'a>() -> &'a ComputePassDescriptorRef {
+        unsafe { msg_send![class!(MTLComputePassDescriptor), computePassDescriptor] }
+    }
+}
+
+impl ComputePassDescriptorRef {
+    pub fn sample_buffer_attachments(
+        &self,
+    ) -> &ComputePassSampleBufferAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, sampleBufferAttachments] }
+    }
+
+    pub fn set_dispatch_type(&self, ty: MTLDispatchType) {
+        unsafe { msg_send![self, setDispatchType: ty] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepasssamplebufferattachmentdescriptorarray>
+pub enum MTLComputePassSampleBufferAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLComputePassSampleBufferAttachmentDescriptorArray;
+    pub struct ComputePassSampleBufferAttachmentDescriptorArray;
+}
+
+impl ComputePassSampleBufferAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&ComputePassSampleBufferAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&ComputePassSampleBufferAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepasssamplebufferattachmentdescriptor>
+pub enum MTLComputePassSampleBufferAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLComputePassSampleBufferAttachmentDescriptor;
+    pub struct ComputePassSampleBufferAttachmentDescriptor;
+}
+
+impl ComputePassSampleBufferAttachmentDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLComputePassSampleBufferAttachmentDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl ComputePassSampleBufferAttachmentDescriptorRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
+        unsafe { msg_send![self, sampleBuffer] }
+    }
+
+    pub fn set_sample_buffer(&self, sample_buffer: &CounterSampleBufferRef) {
+        unsafe { msg_send![self, setSampleBuffer: sample_buffer] }
+    }
+
+    pub fn start_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, startOfEncoderSampleIndex] }
+    }
+
+    pub fn set_start_of_encoder_sample_index(&self, start_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setStartOfEncoderSampleIndex: start_of_encoder_sample_index
+            ]
+        }
+    }
+
+    pub fn end_of_encoder_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, endOfEncoderSampleIndex] }
+    }
+
+    pub fn set_end_of_encoder_sample_index(&self, end_of_encoder_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setEndOfEncoderSampleIndex: end_of_encoder_sample_index
+            ]
+        }
+    }
+}

vendor/metal/src/constants.rs

@@ -0,0 +1,152 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+/// See <https://developer.apple.com/documentation/metal/mtlpixelformat>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub enum MTLPixelFormat {
+    Invalid = 0,
+    A8Unorm = 1,
+    R8Unorm = 10,
+    R8Unorm_sRGB = 11,
+    R8Snorm = 12,
+    R8Uint = 13,
+    R8Sint = 14,
+    R16Unorm = 20,
+    R16Snorm = 22,
+    R16Uint = 23,
+    R16Sint = 24,
+    R16Float = 25,
+    RG8Unorm = 30,
+    RG8Unorm_sRGB = 31,
+    RG8Snorm = 32,
+    RG8Uint = 33,
+    RG8Sint = 34,
+    B5G6R5Unorm = 40,
+    A1BGR5Unorm = 41,
+    ABGR4Unorm = 42,
+    BGR5A1Unorm = 43,
+    R32Uint = 53,
+    R32Sint = 54,
+    R32Float = 55,
+    RG16Unorm = 60,
+    RG16Snorm = 62,
+    RG16Uint = 63,
+    RG16Sint = 64,
+    RG16Float = 65,
+    RGBA8Unorm = 70,
+    RGBA8Unorm_sRGB = 71,
+    RGBA8Snorm = 72,
+    RGBA8Uint = 73,
+    RGBA8Sint = 74,
+    BGRA8Unorm = 80,
+    BGRA8Unorm_sRGB = 81,
+    RGB10A2Unorm = 90,
+    RGB10A2Uint = 91,
+    RG11B10Float = 92,
+    RGB9E5Float = 93,
+    BGR10A2Unorm = 94,
+    RG32Uint = 103,
+    RG32Sint = 104,
+    RG32Float = 105,
+    RGBA16Unorm = 110,
+    RGBA16Snorm = 112,
+    RGBA16Uint = 113,
+    RGBA16Sint = 114,
+    RGBA16Float = 115,
+    RGBA32Uint = 123,
+    RGBA32Sint = 124,
+    RGBA32Float = 125,
+    BC1_RGBA = 130,
+    BC1_RGBA_sRGB = 131,
+    BC2_RGBA = 132,
+    BC2_RGBA_sRGB = 133,
+    BC3_RGBA = 134,
+    BC3_RGBA_sRGB = 135,
+    BC4_RUnorm = 140,
+    BC4_RSnorm = 141,
+    BC5_RGUnorm = 142,
+    BC5_RGSnorm = 143,
+    BC6H_RGBFloat = 150,
+    BC6H_RGBUfloat = 151,
+    BC7_RGBAUnorm = 152,
+    BC7_RGBAUnorm_sRGB = 153,
+    PVRTC_RGB_2BPP = 160,
+    PVRTC_RGB_2BPP_sRGB = 161,
+    PVRTC_RGB_4BPP = 162,
+    PVRTC_RGB_4BPP_sRGB = 163,
+    PVRTC_RGBA_2BPP = 164,
+    PVRTC_RGBA_2BPP_sRGB = 165,
+    PVRTC_RGBA_4BPP = 166,
+    PVRTC_RGBA_4BPP_sRGB = 167,
+    EAC_R11Unorm = 170,
+    EAC_R11Snorm = 172,
+    EAC_RG11Unorm = 174,
+    EAC_RG11Snorm = 176,
+    EAC_RGBA8 = 178,
+    EAC_RGBA8_sRGB = 179,
+    ETC2_RGB8 = 180,
+    ETC2_RGB8_sRGB = 181,
+    ETC2_RGB8A1 = 182,
+    ETC2_RGB8A1_sRGB = 183,
+    ASTC_4x4_sRGB = 186,
+    ASTC_5x4_sRGB = 187,
+    ASTC_5x5_sRGB = 188,
+    ASTC_6x5_sRGB = 189,
+    ASTC_6x6_sRGB = 190,
+    ASTC_8x5_sRGB = 192,
+    ASTC_8x6_sRGB = 193,
+    ASTC_8x8_sRGB = 194,
+    ASTC_10x5_sRGB = 195,
+    ASTC_10x6_sRGB = 196,
+    ASTC_10x8_sRGB = 197,
+    ASTC_10x10_sRGB = 198,
+    ASTC_12x10_sRGB = 199,
+    ASTC_12x12_sRGB = 200,
+    ASTC_4x4_LDR = 204,
+    ASTC_5x4_LDR = 205,
+    ASTC_5x5_LDR = 206,
+    ASTC_6x5_LDR = 207,
+    ASTC_6x6_LDR = 208,
+    ASTC_8x5_LDR = 210,
+    ASTC_8x6_LDR = 211,
+    ASTC_8x8_LDR = 212,
+    ASTC_10x5_LDR = 213,
+    ASTC_10x6_LDR = 214,
+    ASTC_10x8_LDR = 215,
+    ASTC_10x10_LDR = 216,
+    ASTC_12x10_LDR = 217,
+    ASTC_12x12_LDR = 218,
+    ASTC_4x4_HDR = 222,
+    ASTC_5x4_HDR = 223,
+    ASTC_5x5_HDR = 224,
+    ASTC_6x5_HDR = 225,
+    ASTC_6x6_HDR = 226,
+    ASTC_8x5_HDR = 228,
+    ASTC_8x6_HDR = 229,
+    ASTC_8x8_HDR = 230,
+    ASTC_10x5_HDR = 231,
+    ASTC_10x6_HDR = 232,
+    ASTC_10x8_HDR = 233,
+    ASTC_10x10_HDR = 234,
+    ASTC_12x10_HDR = 235,
+    ASTC_12x12_HDR = 236,
+    GBGR422 = 240,
+    BGRG422 = 241,
+    Depth16Unorm = 250,
+    Depth32Float = 252,
+    Stencil8 = 253,
+    Depth24Unorm_Stencil8 = 255,
+    Depth32Float_Stencil8 = 260,
+    X32_Stencil8 = 261,
+    X24_Stencil8 = 262,
+    BGRA10_XR = 552,
+    BGRA10_XR_SRGB = 553,
+    BGR10_XR = 554,
+    BGR10_XR_SRGB = 555,
+}

vendor/metal/src/counters.rs

@@ -0,0 +1,119 @@
+use crate::{MTLStorageMode, NSUInteger};
+use std::mem;
+
+/// See <https://developer.apple.com/documentation/metal/mtlcountersamplebufferdescriptor>
+pub enum MTLCounterSampleBufferDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLCounterSampleBufferDescriptor;
+    pub struct CounterSampleBufferDescriptor;
+}
+
+impl CounterSampleBufferDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLCounterSampleBufferDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl CounterSampleBufferDescriptorRef {
+    pub fn counter_set(&self) -> &CounterSetRef {
+        unsafe { msg_send![self, counterSet] }
+    }
+
+    pub fn set_counter_set(&self, counter_set: &CounterSetRef) {
+        unsafe { msg_send![self, setCounterSet: counter_set] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn sample_count(&self) -> u64 {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn set_sample_count(&self, sample_count: u64) {
+        unsafe { msg_send![self, setSampleCount: sample_count] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_storage_mode(&self, storage_mode: MTLStorageMode) {
+        unsafe { msg_send![self, setStorageMode: storage_mode] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcountersamplebuffer>
+pub enum MTLCounterSampleBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLCounterSampleBuffer;
+    pub struct CounterSampleBuffer;
+}
+
+impl CounterSampleBufferRef {
+    pub fn sample_count(&self) -> u64 {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn resolve_counter_range(&self, range: crate::NSRange) -> Vec<NSUInteger> {
+        let mut data = vec![0 as NSUInteger; range.length as usize];
+        let total_bytes = range.length * mem::size_of::<NSUInteger>() as u64;
+        unsafe {
+            let ns_data: *mut crate::Object = msg_send![self, resolveCounterRange: range];
+            let () = msg_send![ns_data, getBytes: data.as_mut_ptr() length: total_bytes];
+        }
+        data
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcounter>
+pub enum MTLCounter {}
+
+foreign_obj_type! {
+    type CType = MTLCounter;
+    pub struct Counter;
+}
+
+impl CounterRef {}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcounterset>
+pub enum MTLCounterSet {}
+
+foreign_obj_type! {
+    type CType = MTLCounterSet;
+    pub struct CounterSet;
+}
+
+impl CounterSetRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommoncounterset>
+pub enum MTLCommonCounterSet {}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcommoncounter>
+pub enum MTLCommonCounter {}
+
+foreign_obj_type! {
+    type CType = MTLCommonCounter;
+    pub struct CommonCounter;
+}

vendor/metal/src/depthstencil.rs

@@ -0,0 +1,190 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use crate::DeviceRef;
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomparefunction>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCompareFunction {
+    Never = 0,
+    Less = 1,
+    Equal = 2,
+    LessEqual = 3,
+    Greater = 4,
+    NotEqual = 5,
+    GreaterEqual = 6,
+    Always = 7,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstenciloperation>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLStencilOperation {
+    Keep = 0,
+    Zero = 1,
+    Replace = 2,
+    IncrementClamp = 3,
+    DecrementClamp = 4,
+    Invert = 5,
+    IncrementWrap = 6,
+    DecrementWrap = 7,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstencildescriptor>
+pub enum MTLStencilDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLStencilDescriptor;
+    pub struct StencilDescriptor;
+}
+
+impl StencilDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLStencilDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl StencilDescriptorRef {
+    pub fn stencil_compare_function(&self) -> MTLCompareFunction {
+        unsafe { msg_send![self, stencilCompareFunction] }
+    }
+
+    pub fn set_stencil_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setStencilCompareFunction: func] }
+    }
+
+    pub fn stencil_failure_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, stencilFailureOperation] }
+    }
+
+    pub fn set_stencil_failure_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setStencilFailureOperation: operation] }
+    }
+
+    pub fn depth_failure_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, depthFailureOperation] }
+    }
+
+    pub fn set_depth_failure_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setDepthFailureOperation: operation] }
+    }
+
+    pub fn depth_stencil_pass_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, depthStencilPassOperation] }
+    }
+
+    pub fn set_depth_stencil_pass_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setDepthStencilPassOperation: operation] }
+    }
+
+    pub fn read_mask(&self) -> u32 {
+        unsafe { msg_send![self, readMask] }
+    }
+
+    pub fn set_read_mask(&self, mask: u32) {
+        unsafe { msg_send![self, setReadMask: mask] }
+    }
+
+    pub fn write_mask(&self) -> u32 {
+        unsafe { msg_send![self, writeMask] }
+    }
+
+    pub fn set_write_mask(&self, mask: u32) {
+        unsafe { msg_send![self, setWriteMask: mask] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtldepthstencildescriptor>
+pub enum MTLDepthStencilDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLDepthStencilDescriptor;
+    pub struct DepthStencilDescriptor;
+}
+
+impl DepthStencilDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLDepthStencilDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl DepthStencilDescriptorRef {
+    pub fn depth_compare_function(&self) -> MTLCompareFunction {
+        unsafe { msg_send![self, depthCompareFunction] }
+    }
+
+    pub fn set_depth_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setDepthCompareFunction: func] }
+    }
+
+    pub fn depth_write_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isDepthWriteEnabled] }
+    }
+
+    pub fn set_depth_write_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setDepthWriteEnabled: enabled] }
+    }
+
+    pub fn front_face_stencil(&self) -> Option<&StencilDescriptorRef> {
+        unsafe { msg_send![self, frontFaceStencil] }
+    }
+
+    pub fn set_front_face_stencil(&self, descriptor: Option<&StencilDescriptorRef>) {
+        unsafe { msg_send![self, setFrontFaceStencil: descriptor] }
+    }
+
+    pub fn back_face_stencil(&self) -> Option<&StencilDescriptorRef> {
+        unsafe { msg_send![self, backFaceStencil] }
+    }
+
+    pub fn set_back_face_stencil(&self, descriptor: Option<&StencilDescriptorRef>) {
+        unsafe { msg_send![self, setBackFaceStencil: descriptor] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtldepthstencilstate>
+pub enum MTLDepthStencilState {}
+
+foreign_obj_type! {
+    type CType = MTLDepthStencilState;
+    pub struct DepthStencilState;
+}
+
+impl DepthStencilStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}

vendor/metal/src/drawable.rs

@@ -0,0 +1,39 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use block::Block;
+
+use super::NSUInteger;
+
+type DrawablePresentedHandler<'a> = Block<(&'a DrawableRef,), ()>;
+type CFTimeInterval = f64;
+
+/// See <https://developer.apple.com/documentation/metal/mtldrawable>
+pub enum MTLDrawable {}
+
+foreign_obj_type! {
+    type CType = MTLDrawable;
+    pub struct Drawable;
+}
+
+impl DrawableRef {
+    pub fn present(&self) {
+        unsafe { msg_send![self, present] }
+    }
+
+    pub fn drawable_id(&self) -> NSUInteger {
+        unsafe { msg_send![self, drawableID] }
+    }
+
+    pub fn add_presented_handler(&self, block: &DrawablePresentedHandler) {
+        unsafe { msg_send![self, addPresentedHandler: block] }
+    }
+
+    pub fn presented_time(&self) -> CFTimeInterval {
+        unsafe { msg_send![self, presentedTime] }
+    }
+}

vendor/metal/src/heap.rs

@@ -0,0 +1,281 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+/// Only available on macos(10.15), ios(13.0)
+///
+/// See <https://developer.apple.com/documentation/metal/mtlheaptype/>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLHeapType {
+    Automatic = 0,
+    Placement = 1,
+    /// Only available on macos(11.0), macCatalyst(14.0)
+    Sparse = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlheap/>
+pub enum MTLHeap {}
+
+foreign_obj_type! {
+    type CType = MTLHeap;
+    pub struct Heap;
+}
+
+impl HeapRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    pub fn set_purgeable_state(&self, state: MTLPurgeableState) -> MTLPurgeableState {
+        unsafe { msg_send![self, setPurgeableState: state] }
+    }
+
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn used_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, usedSize] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_type(&self) -> MTLHeapType {
+        unsafe { msg_send![self, type] }
+    }
+
+    /// Only available on macos(10.13), ios(11.0)
+    pub fn current_allocated_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, currentAllocatedSize] }
+    }
+
+    pub fn max_available_size_with_alignment(&self, alignment: NSUInteger) -> NSUInteger {
+        unsafe { msg_send![self, maxAvailableSizeWithAlignment: alignment] }
+    }
+
+    pub fn new_buffer(&self, length: u64, options: MTLResourceOptions) -> Option<Buffer> {
+        unsafe {
+            let ptr: *mut MTLBuffer = msg_send![self, newBufferWithLength:length
+                                                                  options:options];
+            if !ptr.is_null() {
+                Some(Buffer::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    pub fn new_texture(&self, descriptor: &TextureDescriptorRef) -> Option<Texture> {
+        unsafe {
+            let ptr: *mut MTLTexture = msg_send![self, newTextureWithDescriptor: descriptor];
+            if !ptr.is_null() {
+                Some(Texture::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 10.15+ & iOS 13.0+
+    pub fn new_buffer_with_offset(
+        &self,
+        length: u64,
+        options: MTLResourceOptions,
+        offset: u64,
+    ) -> Option<Buffer> {
+        unsafe {
+            let ptr: *mut MTLBuffer = msg_send![self, newBufferWithLength:length
+                                                                  options:options
+                                                                  offset:offset];
+            if !ptr.is_null() {
+                Some(Buffer::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 10.15+ & iOS 13.0+
+    pub fn new_texture_with_offset(
+        &self,
+        descriptor: &TextureDescriptorRef,
+        offset: u64,
+    ) -> Option<Texture> {
+        unsafe {
+            let ptr: *mut MTLTexture = msg_send![self, newTextureWithDescriptor:descriptor
+                                                                         offset:offset];
+            if !ptr.is_null() {
+                Some(Texture::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 13.0+ & iOS 16.0+
+    pub fn new_acceleration_structure_with_descriptor(
+        &self,
+        descriptor: &AccelerationStructureDescriptorRef,
+    ) -> Option<AccelerationStructure> {
+        unsafe {
+            let ptr: *mut MTLAccelerationStructure =
+                msg_send![self, newAccelerationStructureWithDescriptor: descriptor];
+            if !ptr.is_null() {
+                Some(AccelerationStructure::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 13.0+ & iOS 16.0+
+    pub fn new_acceleration_structure_with_descriptor_offset(
+        &self,
+        descriptor: &AccelerationStructureDescriptorRef,
+        offset: u64,
+    ) -> Option<AccelerationStructure> {
+        unsafe {
+            let ptr: *mut MTLAccelerationStructure = msg_send![self, newAccelerationStructureWithDescriptor:descriptor
+                                                                     offset:offset];
+            if !ptr.is_null() {
+                Some(AccelerationStructure::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 13.0+ & iOS 16.0+
+    pub fn new_acceleration_structure_with_size(&self, size: u64) -> Option<AccelerationStructure> {
+        unsafe {
+            let ptr: *mut MTLAccelerationStructure =
+                msg_send![self, newAccelerationStructureWithSize:size];
+            if !ptr.is_null() {
+                Some(AccelerationStructure::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 13.0+ & iOS 16.0+
+    pub fn new_acceleration_structure_with_size_offset(
+        &self,
+        size: u64,
+        offset: u64,
+    ) -> Option<AccelerationStructure> {
+        unsafe {
+            let ptr: *mut MTLAccelerationStructure = msg_send![self, newAccelerationStructureWithSize:size
+                                                                     offset:offset];
+            if !ptr.is_null() {
+                Some(AccelerationStructure::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlheapdescriptor/>
+pub enum MTLHeapDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLHeapDescriptor;
+    pub struct HeapDescriptor;
+}
+
+impl HeapDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLHeapDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl HeapDescriptorRef {
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn set_cpu_cache_mode(&self, mode: MTLCPUCacheMode) {
+        unsafe { msg_send![self, setCpuCacheMode: mode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_storage_mode(&self, mode: MTLStorageMode) {
+        unsafe { msg_send![self, setStorageMode: mode] }
+    }
+
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn set_size(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setSize: size] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn set_hazard_tracking_mode(&self, hazard_tracking_mode: MTLHazardTrackingMode) {
+        unsafe { msg_send![self, setHazardTrackingMode: hazard_tracking_mode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_type(&self) -> MTLHeapType {
+        unsafe { msg_send![self, type] }
+    }
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn set_heap_type(&self, type_: MTLHeapType) {
+        unsafe { msg_send![self, setType: type_] }
+    }
+}

vendor/metal/src/indirect_encoder.rs

@@ -0,0 +1,344 @@
+use super::*;
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metal/mtlindirectcommandtype/>
+    #[allow(non_upper_case_globals)]
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLIndirectCommandType: NSUInteger {
+        const Draw                      = 1 << 0;
+        const DrawIndexed               = 1 << 1;
+        const DrawPatches               = 1 << 2;
+        const DrawIndexedPatches        = 1 << 3;
+        const ConcurrentDispatch        = 1 << 4;
+        const ConcurrentDispatchThreads = 1 << 5;
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlindirectcommandbufferdescriptor/>
+pub enum MTLIndirectCommandBufferDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectCommandBufferDescriptor;
+    pub struct IndirectCommandBufferDescriptor;
+}
+
+impl IndirectCommandBufferDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLIndirectCommandBufferDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl IndirectCommandBufferDescriptorRef {
+    pub fn command_types(&self) -> MTLIndirectCommandType {
+        unsafe { msg_send![self, commandTypes] }
+    }
+
+    pub fn set_command_types(&self, types: MTLIndirectCommandType) {
+        unsafe { msg_send![self, setCommandTypes: types] }
+    }
+
+    pub fn inherit_buffers(&self) -> bool {
+        unsafe { msg_send_bool![self, inheritBuffers] }
+    }
+
+    pub fn set_inherit_buffers(&self, inherit: bool) {
+        unsafe { msg_send![self, setInheritBuffers: inherit] }
+    }
+
+    pub fn inherit_pipeline_state(&self) -> bool {
+        unsafe { msg_send_bool![self, inheritPipelineState] }
+    }
+
+    pub fn set_inherit_pipeline_state(&self, inherit: bool) {
+        unsafe { msg_send![self, setInheritPipelineState: inherit] }
+    }
+
+    pub fn max_vertex_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxVertexBufferBindCount] }
+    }
+
+    pub fn set_max_vertex_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxVertexBufferBindCount: count] }
+    }
+
+    pub fn max_fragment_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxFragmentBufferBindCount] }
+    }
+
+    pub fn set_max_fragment_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxFragmentBufferBindCount: count] }
+    }
+
+    pub fn max_kernel_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxKernelBufferBindCount] }
+    }
+
+    pub fn set_max_kernel_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxKernelBufferBindCount: count] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlindirectcommandbuffer/>
+pub enum MTLIndirectCommandBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectCommandBuffer;
+    pub struct IndirectCommandBuffer;
+    type ParentType = Resource;
+}
+
+impl IndirectCommandBufferRef {
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn indirect_render_command_at_index(&self, index: NSUInteger) -> &IndirectRenderCommandRef {
+        unsafe { msg_send![self, indirectRenderCommandAtIndex: index] }
+    }
+
+    pub fn indirect_compute_command_at_index(
+        &self,
+        index: NSUInteger,
+    ) -> &IndirectComputeCommandRef {
+        unsafe { msg_send![self, indirectComputeCommandAtIndex: index] }
+    }
+
+    pub fn reset_with_range(&self, range: crate::NSRange) {
+        unsafe { msg_send![self, resetWithRange: range] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlindirectrendercommand/>
+pub enum MTLIndirectRenderCommand {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectRenderCommand;
+    pub struct IndirectRenderCommand;
+}
+
+impl IndirectRenderCommandRef {
+    pub fn set_render_pipeline_state(&self, pipeline_state: &RenderPipelineStateRef) {
+        unsafe { msg_send![self, setRenderPipelineState: pipeline_state] }
+    }
+
+    pub fn set_vertex_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexBuffer: buffer
+                offset: offset
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_fragment_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentBuffer:buffer
+                offset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn draw_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        vertex_start: NSUInteger,
+        vertex_count: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                vertexStart: vertex_start
+                vertexCount: vertex_count
+                instanceCount: instance_count
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_count: NSUInteger,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_vertex: NSUInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexCount: index_count
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+                instanceCount: instance_count
+                baseVertex: base_vertex
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_patches(
+        &self,
+        number_of_patch_control_points: NSUInteger,
+        patch_start: NSUInteger,
+        patch_count: NSUInteger,
+        patch_index_buffer: &BufferRef,
+        patch_index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+        tesselation_factor_buffer: &BufferRef,
+        tesselation_factor_buffer_offset: NSUInteger,
+        tesselation_factor_buffer_instance_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPatches: number_of_patch_control_points
+                patchStart: patch_start
+                patchCount: patch_count
+                patchIndexBuffer: patch_index_buffer
+                patchIndexBufferOffset: patch_index_buffer_offset
+                instanceCount: instance_count
+                baseInstance: base_instance
+                tessellationFactorBuffer: tesselation_factor_buffer
+                tessellationFactorBufferOffset: tesselation_factor_buffer_offset
+                tessellationFactorBufferInstanceStride: tesselation_factor_buffer_instance_stride
+            ]
+        }
+    }
+
+    pub fn draw_indexed_patches(
+        &self,
+        number_of_patch_control_points: NSUInteger,
+        patch_start: NSUInteger,
+        patch_count: NSUInteger,
+        patch_index_buffer: &BufferRef,
+        patch_index_buffer_offset: NSUInteger,
+        control_point_index_buffer: &BufferRef,
+        control_point_index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+        tesselation_factor_buffer: &BufferRef,
+        tesselation_factor_buffer_offset: NSUInteger,
+        tesselation_factor_buffer_instance_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPatches: number_of_patch_control_points
+                patchStart: patch_start
+                patchCount: patch_count
+                patchIndexBuffer: patch_index_buffer
+                patchIndexBufferOffset: patch_index_buffer_offset
+                controlPointIndexBuffer: control_point_index_buffer
+                controlPointIndexBufferOffset: control_point_index_buffer_offset
+                instanceCount: instance_count
+                baseInstance: base_instance
+                tessellationFactorBuffer: tesselation_factor_buffer
+                tessellationFactorBufferOffset: tesselation_factor_buffer_offset
+                tessellationFactorBufferInstanceStride: tesselation_factor_buffer_instance_stride
+            ]
+        }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlindirectcomputecommand/>
+pub enum MTLIndirectComputeCommand {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectComputeCommand;
+    pub struct IndirectComputeCommand;
+}
+
+impl IndirectComputeCommandRef {
+    pub fn set_compute_pipeline_state(&self, state: &ComputePipelineStateRef) {
+        unsafe { msg_send![self, setComputePipelineState: state] }
+    }
+
+    pub fn set_kernel_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setKernelBuffer: buffer
+                offset: offset
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_threadgroup_memory_length(&self, index: NSUInteger, length: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setThreadgroupMemoryLength: length
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_stage_in_region(&self, region: MTLRegion) {
+        unsafe { msg_send![self, setStageInRegion: region] }
+    }
+
+    pub fn set_barrier(&self) {
+        unsafe { msg_send![self, setBarrier] }
+    }
+
+    pub fn clear_barrier(&self) {
+        unsafe { msg_send![self, clearBarrier] }
+    }
+
+    pub fn concurrent_dispatch_threadgroups(
+        &self,
+        thread_groups_per_grid: MTLSize,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                concurrentDispatchThreadgroups: thread_groups_per_grid
+                threadsPerThreadgroup: threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn concurrent_dispatch_threads(
+        &self,
+        thread_groups_per_grid: MTLSize,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                concurrentDispatchThreads: thread_groups_per_grid
+                threadsPerThreadgroup: threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}

vendor/metal/src/lib.rs

@@ -0,0 +1,657 @@
+// Copyright 2023 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+#![allow(deprecated)]
+#![allow(non_snake_case)]
+#![allow(non_upper_case_globals)]
+// Silence clippy warnings as a stopgap to get CI working.
+#![allow(clippy::enum_variant_names)]
+#![allow(clippy::identity_op)]
+#![allow(clippy::let_and_return)]
+#![allow(clippy::missing_safety_doc)]
+#![allow(clippy::missing_transmute_annotations)]
+#![allow(clippy::new_ret_no_self)]
+#![allow(clippy::new_without_default)]
+#![allow(clippy::too_many_arguments)]
+#![allow(clippy::transmute_ptr_to_ref)]
+#![allow(clippy::unit_arg)]
+
+#[macro_use]
+pub extern crate objc;
+#[macro_use]
+pub extern crate foreign_types;
+#[macro_use]
+pub extern crate paste;
+
+use std::{borrow::Borrow, marker::PhantomData, mem, ops::Deref, os::raw::c_void};
+
+use core_graphics_types::{base::CGFloat, geometry::CGSize};
+use foreign_types::ForeignType;
+use objc::runtime::{Object, NO, YES};
+
+/// See <https://developer.apple.com/documentation/objectivec/nsinteger>
+#[cfg(target_pointer_width = "64")]
+pub type NSInteger = i64;
+
+/// See <https://developer.apple.com/documentation/objectivec/nsinteger>
+#[cfg(not(target_pointer_width = "64"))]
+pub type NSInteger = i32;
+
+/// See <https://developer.apple.com/documentation/objectivec/nsuinteger>
+#[cfg(target_pointer_width = "64")]
+pub type NSUInteger = u64;
+
+/// See <https://developer.apple.com/documentation/objectivec/nsuinteger>
+#[cfg(target_pointer_width = "32")]
+pub type NSUInteger = u32;
+
+/// See <https://developer.apple.com/documentation/foundation/nsrange>
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct NSRange {
+    pub location: NSUInteger,
+    pub length: NSUInteger,
+}
+
+impl NSRange {
+    #[inline]
+    pub fn new(location: NSUInteger, length: NSUInteger) -> NSRange {
+        NSRange { location, length }
+    }
+}
+
+fn nsstring_as_str(nsstr: &objc::runtime::Object) -> &str {
+    let bytes = unsafe {
+        let bytes: *const std::os::raw::c_char = msg_send![nsstr, UTF8String];
+        bytes as *const u8
+    };
+    let len: NSUInteger = unsafe { msg_send![nsstr, length] };
+    unsafe {
+        let bytes = std::slice::from_raw_parts(bytes, len as usize);
+        std::str::from_utf8(bytes).unwrap()
+    }
+}
+
+fn nsstring_from_str(string: &str) -> *mut objc::runtime::Object {
+    const UTF8_ENCODING: usize = 4;
+
+    let cls = class!(NSString);
+    let bytes = string.as_ptr() as *const c_void;
+    unsafe {
+        let obj: *mut objc::runtime::Object = msg_send![cls, alloc];
+        let obj: *mut objc::runtime::Object = msg_send![
+            obj,
+            initWithBytes:bytes
+            length:string.len()
+            encoding:UTF8_ENCODING
+        ];
+        let _: *mut c_void = msg_send![obj, autorelease];
+        obj
+    }
+}
+
+/// Define a Rust wrapper for an Objective-C opaque type.
+///
+/// This macro adapts the `foreign-types` crate's [`foreign_type!`]
+/// macro to Objective-C, defining Rust types that represent owned and
+/// borrowed forms of some underlying Objective-C type, using
+/// Objective-C's reference counting to manage its lifetime.
+///
+/// Given a use of the form:
+///
+/// ```ignore
+/// foreign_obj_type! {
+///     type CType = MTLBuffer;   // underlying Objective-C type
+///     pub struct Buffer;        // owned Rust type
+///     pub struct BufferRef;     // borrowed Rust type
+///     type ParentType = ResourceRef;  // borrowed parent class
+/// }
+/// ```
+///
+/// This defines the types `Buffer` and `BufferRef` as owning and
+/// non-owning types, analogous to `String` and `str`, that manage
+/// some underlying `*mut MTLBuffer`:
+///
+/// - Both `Buffer` and `BufferRef` implement [`obj::Message`], indicating
+///   that they can be sent Objective-C messages.
+///
+/// - Dropping a `Buffer` sends the underlying `MTLBuffer` a `release`
+///   message, and cloning a `BufferRef` sends a `retain` message and
+///   returns a new `Buffer`.
+///
+/// - `Buffer` dereferences to `BufferRef`.
+///
+/// - `BufferRef` dereferences to its parent type `ResourceRef`. The
+///   `ParentType` component is optional; if omitted, the `Ref` type
+///   doesn't implement `Deref` or `DerefMut`.
+///
+/// - Both `Buffer` and `BufferRef` implement `std::fmt::Debug`,
+///   sending an Objective-C `debugDescription` message to the
+///   underlying `MTLBuffer`.
+///
+/// Following the `foreign_types` crate's nomenclature, the `Ref`
+/// suffix indicates that `BufferRef` and `ResourceRef` are non-owning
+/// types, used *by reference*, like `&BufferRef` or `&ResourceRef`.
+/// These types are not, themselves, references.
+macro_rules! foreign_obj_type {
+    {
+        type CType = $raw_ident:ident;
+        pub struct $owned_ident:ident;
+        type ParentType = $parent_ident:ident;
+    } => {
+        foreign_obj_type! {
+            type CType = $raw_ident;
+            pub struct $owned_ident;
+        }
+
+        impl ::std::ops::Deref for paste!{[<$owned_ident Ref>]} {
+            type Target = paste!{[<$parent_ident Ref>]};
+
+            #[inline]
+            fn deref(&self) -> &Self::Target {
+                unsafe { &*(self as *const Self as *const Self::Target)  }
+            }
+        }
+
+        impl ::std::convert::From<$owned_ident> for $parent_ident {
+            fn from(item: $owned_ident) -> Self {
+                unsafe { Self::from_ptr(::std::mem::transmute(item.into_ptr())) }
+            }
+        }
+    };
+    {
+        type CType = $raw_ident:ident;
+        pub struct $owned_ident:ident;
+    } => {
+        foreign_type! {
+            pub unsafe type $owned_ident: Sync + Send {
+                type CType = $raw_ident;
+                fn drop = crate::obj_drop;
+                fn clone = crate::obj_clone;
+            }
+        }
+
+        unsafe impl ::objc::Message for $raw_ident {
+        }
+        unsafe impl ::objc::Message for paste!{[<$owned_ident Ref>]} {
+        }
+
+        impl ::std::fmt::Debug for paste!{[<$owned_ident Ref>]} {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                unsafe {
+                    let string: *mut ::objc::runtime::Object = msg_send![self, debugDescription];
+                    write!(f, "{}", crate::nsstring_as_str(&*string))
+                }
+            }
+        }
+
+        impl ::std::fmt::Debug for $owned_ident {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                ::std::ops::Deref::deref(self).fmt(f)
+            }
+        }
+    };
+}
+
+macro_rules! try_objc {
+    {
+        $err_name: ident => $body:expr
+    } => {
+        {
+            let mut $err_name: *mut Object = ::std::ptr::null_mut();
+            let value = $body;
+            if !$err_name.is_null() {
+                let desc: *mut Object = msg_send![$err_name, localizedDescription];
+                let compile_error: *const std::os::raw::c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(compile_error).to_string_lossy().into_owned();
+                return Err(message);
+            }
+            value
+        }
+    };
+}
+
+macro_rules! msg_send_bool {
+    ($obj:expr, $name:ident) => {{
+        match msg_send![$obj, $name] {
+            YES => true,
+            NO => false,
+            #[cfg(not(target_arch = "aarch64"))]
+            _ => unreachable!(),
+        }
+    }};
+    ($obj:expr, $name:ident : $arg:expr) => {{
+        match msg_send![$obj, $name: $arg] {
+            YES => true,
+            NO => false,
+            #[cfg(not(target_arch = "aarch64"))]
+            _ => unreachable!(),
+        }
+    }};
+}
+
+macro_rules! msg_send_bool_error_check {
+    ($obj:expr, $name:ident: $arg:expr) => {{
+        let mut err: *mut Object = ptr::null_mut();
+        let result: BOOL = msg_send![$obj, $name:$arg
+                                                    error:&mut err];
+        if !err.is_null() {
+            let desc: *mut Object = msg_send![err, localizedDescription];
+            let c_msg: *const c_char = msg_send![desc, UTF8String];
+            let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+            Err(message)
+        } else {
+            match result {
+                YES => Ok(true),
+                NO => Ok(false),
+                #[cfg(not(target_arch = "aarch64"))]
+                _ => unreachable!(),
+            }
+        }
+    }};
+}
+
+/// See <https://developer.apple.com/documentation/foundation/nsarray>
+pub struct NSArray<T> {
+    _phantom: PhantomData<T>,
+}
+
+pub struct Array<T>(*mut NSArray<T>)
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static;
+
+pub struct ArrayRef<T>(foreign_types::Opaque, PhantomData<T>)
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static;
+
+impl<T> Drop for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn drop(&mut self) {
+        unsafe {
+            let () = msg_send![self.0, release];
+        }
+    }
+}
+
+impl<T> Clone for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn clone(&self) -> Self {
+        unsafe { Array(msg_send![self.0, retain]) }
+    }
+}
+
+unsafe impl<T> objc::Message for NSArray<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+}
+
+unsafe impl<T> objc::Message for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+}
+
+impl<T> Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    pub fn from_slice<'a>(s: &[&T::Ref]) -> &'a ArrayRef<T> {
+        unsafe {
+            let class = class!(NSArray);
+            msg_send![class, arrayWithObjects: s.as_ptr() count: s.len()]
+        }
+    }
+
+    pub fn from_owned_slice<'a>(s: &[T]) -> &'a ArrayRef<T> {
+        unsafe {
+            let class = class!(NSArray);
+            msg_send![class, arrayWithObjects: s.as_ptr() count: s.len()]
+        }
+    }
+}
+
+unsafe impl<T> foreign_types::ForeignType for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type CType = NSArray<T>;
+    type Ref = ArrayRef<T>;
+
+    unsafe fn from_ptr(p: *mut NSArray<T>) -> Self {
+        Array(p)
+    }
+
+    fn as_ptr(&self) -> *mut NSArray<T> {
+        self.0
+    }
+}
+
+unsafe impl<T> foreign_types::ForeignTypeRef for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type CType = NSArray<T>;
+}
+
+impl<T> Deref for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type Target = ArrayRef<T>;
+
+    #[inline]
+    fn deref(&self) -> &ArrayRef<T> {
+        unsafe { mem::transmute(self.as_ptr()) }
+    }
+}
+
+impl<T> Borrow<ArrayRef<T>> for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn borrow(&self) -> &ArrayRef<T> {
+        unsafe { mem::transmute(self.as_ptr()) }
+    }
+}
+
+impl<T> ToOwned for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type Owned = Array<T>;
+
+    fn to_owned(&self) -> Array<T> {
+        unsafe { Array::from_ptr(msg_send![self, retain]) }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/quartzcore/cametaldrawable>
+pub enum CAMetalDrawable {}
+
+foreign_obj_type! {
+    type CType = CAMetalDrawable;
+    pub struct MetalDrawable;
+    type ParentType = Drawable;
+}
+
+impl MetalDrawableRef {
+    pub fn texture(&self) -> &TextureRef {
+        unsafe { msg_send![self, texture] }
+    }
+}
+
+pub enum NSObject {}
+
+foreign_obj_type! {
+    type CType = NSObject;
+    pub struct NsObject;
+}
+
+impl NsObjectRef {
+    pub fn conforms_to_protocol<T>(&self) -> Result<bool, String> {
+        let name = ::std::any::type_name::<T>();
+        if let Some(name) = name.split("::").last() {
+            if let Some(protocol) = objc::runtime::Protocol::get(name) {
+                Ok(unsafe { msg_send![self, conformsToProtocol: protocol] })
+            } else {
+                Err(format!("Can not find the protocol for type: {}.", name))
+            }
+        } else {
+            Err(format!("Unexpected type name: {}.", name))
+        }
+    }
+}
+
+// See <https://developer.apple.com/documentation/quartzcore/cametallayer>
+pub enum CAMetalLayer {}
+
+foreign_obj_type! {
+    type CType = CAMetalLayer;
+    pub struct MetalLayer;
+}
+
+impl MetalLayer {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(CAMetalLayer);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl MetalLayerRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn set_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, setDevice: device] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn drawable_size(&self) -> CGSize {
+        unsafe { msg_send![self, drawableSize] }
+    }
+
+    pub fn set_drawable_size(&self, size: CGSize) {
+        unsafe { msg_send![self, setDrawableSize: size] }
+    }
+
+    pub fn presents_with_transaction(&self) -> bool {
+        unsafe { msg_send_bool![self, presentsWithTransaction] }
+    }
+
+    pub fn set_presents_with_transaction(&self, transaction: bool) {
+        unsafe { msg_send![self, setPresentsWithTransaction: transaction] }
+    }
+
+    pub fn display_sync_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, displaySyncEnabled] }
+    }
+
+    pub fn set_display_sync_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setDisplaySyncEnabled: enabled] }
+    }
+
+    pub fn maximum_drawable_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maximumDrawableCount] }
+    }
+
+    pub fn set_maximum_drawable_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaximumDrawableCount: count] }
+    }
+
+    pub fn set_edge_antialiasing_mask(&self, mask: u64) {
+        unsafe { msg_send![self, setEdgeAntialiasingMask: mask] }
+    }
+
+    pub fn set_masks_to_bounds(&self, masks: bool) {
+        unsafe { msg_send![self, setMasksToBounds: masks] }
+    }
+
+    pub fn remove_all_animations(&self) {
+        unsafe { msg_send![self, removeAllAnimations] }
+    }
+
+    pub fn next_drawable(&self) -> Option<&MetalDrawableRef> {
+        unsafe { msg_send![self, nextDrawable] }
+    }
+
+    pub fn contents_scale(&self) -> CGFloat {
+        unsafe { msg_send![self, contentsScale] }
+    }
+
+    pub fn set_contents_scale(&self, scale: CGFloat) {
+        unsafe { msg_send![self, setContentsScale: scale] }
+    }
+
+    /// [framebufferOnly Apple Docs](https://developer.apple.com/documentation/metal/mtltexture/1515749-framebufferonly?language=objc)
+    pub fn framebuffer_only(&self) -> bool {
+        unsafe { msg_send_bool!(self, framebufferOnly) }
+    }
+
+    pub fn set_framebuffer_only(&self, framebuffer_only: bool) {
+        unsafe { msg_send![self, setFramebufferOnly: framebuffer_only] }
+    }
+
+    pub fn is_opaque(&self) -> bool {
+        unsafe { msg_send_bool!(self, isOpaque) }
+    }
+
+    pub fn set_opaque(&self, opaque: bool) {
+        unsafe { msg_send![self, setOpaque: opaque] }
+    }
+
+    pub fn wants_extended_dynamic_range_content(&self) -> bool {
+        unsafe { msg_send_bool![self, wantsExtendedDynamicRangeContent] }
+    }
+
+    pub fn set_wants_extended_dynamic_range_content(
+        &self,
+        wants_extended_dynamic_range_content: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setWantsExtendedDynamicRangeContent: wants_extended_dynamic_range_content
+            ]
+        }
+    }
+}
+
+mod acceleration_structure;
+mod acceleration_structure_pass;
+mod argument;
+mod blitpass;
+mod buffer;
+mod capturedescriptor;
+mod capturemanager;
+mod commandbuffer;
+mod commandqueue;
+mod computepass;
+mod constants;
+mod counters;
+mod depthstencil;
+mod device;
+mod drawable;
+mod encoder;
+mod heap;
+mod indirect_encoder;
+mod library;
+#[cfg(feature = "mps")]
+pub mod mps;
+mod pipeline;
+mod renderpass;
+mod resource;
+mod sampler;
+mod sync;
+mod texture;
+mod types;
+mod vertexdescriptor;
+
+#[rustfmt::skip]
+pub use {
+    acceleration_structure::*,
+    acceleration_structure_pass::*,
+    argument::*,
+    blitpass::*,
+    buffer::*,
+    counters::*,
+    computepass::*,
+    capturedescriptor::*,
+    capturemanager::*,
+    commandbuffer::*,
+    commandqueue::*,
+    constants::*,
+    depthstencil::*,
+    device::*,
+    drawable::*,
+    encoder::*,
+    heap::*,
+    indirect_encoder::*,
+    library::*,
+    pipeline::*,
+    renderpass::*,
+    resource::*,
+    sampler::*,
+    texture::*,
+    types::*,
+    vertexdescriptor::*,
+    sync::*,
+};
+
+#[inline]
+unsafe fn obj_drop<T>(p: *mut T) {
+    msg_send![(p as *mut Object), release]
+}
+
+#[inline]
+unsafe fn obj_clone<T: 'static>(p: *mut T) -> *mut T {
+    msg_send![(p as *mut Object), retain]
+}
+
+#[allow(non_camel_case_types)]
+type c_size_t = usize;
+
+// TODO: expand supported interface
+/// See <https://developer.apple.com/documentation/foundation/nsurl>
+pub enum NSURL {}
+
+foreign_obj_type! {
+    type CType = NSURL;
+    pub struct URL;
+}
+
+impl URL {
+    pub fn new_with_string(string: &str) -> Self {
+        unsafe {
+            let ns_str = crate::nsstring_from_str(string);
+            let class = class!(NSURL);
+            msg_send![class, URLWithString: ns_str]
+        }
+    }
+}
+
+impl URLRef {
+    pub fn absolute_string(&self) -> &str {
+        unsafe {
+            let absolute_string = msg_send![self, absoluteString];
+            crate::nsstring_as_str(absolute_string)
+        }
+    }
+
+    pub fn path(&self) -> &str {
+        unsafe {
+            let path = msg_send![self, path];
+            crate::nsstring_as_str(path)
+        }
+    }
+}

vendor/metal/src/library.rs

@@ -0,0 +1,902 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{BOOL, NO, YES};
+
+use std::ffi::CStr;
+use std::os::raw::c_char;
+use std::ptr;
+
+/// Only available on (macos(10.12), ios(10.0)
+///
+/// See <https://developer.apple.com/documentation/metal/mtlpatchtype/>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPatchType {
+    None = 0,
+    Triangle = 1,
+    Quad = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexattribute/>
+pub enum MTLVertexAttribute {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttribute;
+    pub struct VertexAttribute;
+}
+
+impl VertexAttributeRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn attribute_index(&self) -> u64 {
+        unsafe { msg_send![self, attributeIndex] }
+    }
+
+    pub fn attribute_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, attributeType] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe { msg_send_bool![self, isActive] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0)
+    pub fn is_patch_data(&self) -> bool {
+        unsafe { msg_send_bool![self, isPatchData] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0)
+    pub fn is_patch_control_point_data(&self) -> bool {
+        unsafe { msg_send_bool![self, isPatchControlPointData] }
+    }
+}
+
+/// Only available on (macos(10.12), ios(10.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtlattribute/>
+pub enum MTLAttribute {}
+
+foreign_obj_type! {
+    type CType = MTLAttribute;
+    pub struct Attribute;
+}
+
+impl AttributeRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn attribute_index(&self) -> u64 {
+        unsafe { msg_send![self, attributeIndex] }
+    }
+
+    pub fn attribute_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, attributeType] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe { msg_send_bool![self, isActive] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn is_patch_data(&self) -> bool {
+        unsafe { msg_send_bool![self, isPatchData] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn is_patch_control_point_data(&self) -> bool {
+        unsafe { msg_send_bool![self, isPatchControlPointData] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlfunctiontype/>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLFunctionType {
+    Vertex = 1,
+    Fragment = 2,
+    Kernel = 3,
+    /// Only available on (macos(11.0), ios(14.0))
+    Visible = 5,
+    /// Only available on (macos(11.0), ios(14.0))
+    Intersection = 6,
+}
+
+/// Only available on (macos(10.12), ios(10.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtlfunctionconstant/>
+pub enum MTLFunctionConstant {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionConstant;
+    pub struct FunctionConstant;
+}
+
+impl FunctionConstantRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, type] }
+    }
+
+    pub fn index(&self) -> NSUInteger {
+        unsafe { msg_send![self, index] }
+    }
+
+    pub fn required(&self) -> bool {
+        unsafe { msg_send_bool![self, required] }
+    }
+}
+
+bitflags::bitflags! {
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlfunctionoptions/>
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLFunctionOptions: NSUInteger {
+        const None = 0;
+        const CompileToBinary = 1 << 0;
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtlfunctiondescriptor/>
+pub enum MTLFunctionDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionDescriptor;
+    pub struct FunctionDescriptor;
+}
+
+impl FunctionDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLFunctionDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl FunctionDescriptorRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn set_name(&self, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setName: ns_name];
+        }
+    }
+
+    pub fn specialized_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, specializedName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn set_specialized_name(&self, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setSpecializedName: ns_name];
+        }
+    }
+
+    pub fn constant_values(&self) -> &FunctionConstantValuesRef {
+        unsafe { msg_send![self, constantValues] }
+    }
+
+    pub fn set_constant_values(&self, values: &FunctionConstantValuesRef) {
+        unsafe { msg_send![self, setConstantValues: values] }
+    }
+
+    pub fn options(&self) -> MTLFunctionOptions {
+        unsafe { msg_send![self, options] }
+    }
+
+    pub fn set_options(&self, options: MTLFunctionOptions) {
+        unsafe { msg_send![self, setOptions: options] }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtlintersectionfunctiondescriptor/>
+pub enum MTLIntersectionFunctionDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIntersectionFunctionDescriptor;
+    pub struct IntersectionFunctionDescriptor;
+    type ParentType = FunctionDescriptor;
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtlfunctionhandle/>
+pub enum MTLFunctionHandle {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionHandle;
+    pub struct FunctionHandle;
+}
+
+impl FunctionHandleRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn name(&self) -> &str {
+        unsafe {
+            let ns_name = msg_send![self, name];
+            crate::nsstring_as_str(ns_name)
+        }
+    }
+
+    pub fn function_type(&self) -> MTLFunctionType {
+        unsafe { msg_send![self, functionType] }
+    }
+}
+
+// TODO:
+// MTLIntersectionFunctionSignature
+// MTLIntersectionFunctionTableDescriptor
+// MTLIntersectionFunctionTable
+
+/// See <https://developer.apple.com/documentation/metal/mtlfunction/>
+pub enum MTLFunction {}
+
+foreign_obj_type! {
+    type CType = MTLFunction;
+    pub struct Function;
+}
+
+impl FunctionRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn label(&self) -> &str {
+        unsafe {
+            let ns_label = msg_send![self, label];
+            crate::nsstring_as_str(ns_label)
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let ns_label = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: ns_label];
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn function_type(&self) -> MTLFunctionType {
+        unsafe { msg_send![self, functionType] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn patch_type(&self) -> MTLPatchType {
+        unsafe { msg_send![self, patchType] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn patch_control_point_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, patchControlPointCount] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn vertex_attributes(&self) -> &Array<VertexAttribute> {
+        unsafe { msg_send![self, vertexAttributes] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn stage_input_attributes(&self) -> &Array<Attribute> {
+        unsafe { msg_send![self, stageInputAttributes] }
+    }
+
+    pub fn new_argument_encoder(&self, buffer_index: NSUInteger) -> ArgumentEncoder {
+        unsafe {
+            let ptr = msg_send![self, newArgumentEncoderWithBufferIndex: buffer_index];
+            ArgumentEncoder::from_ptr(ptr)
+        }
+    }
+
+    pub fn function_constants_dictionary(&self) -> *mut Object {
+        unsafe { msg_send![self, functionConstantsDictionary] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn options(&self) -> MTLFunctionOptions {
+        unsafe { msg_send![self, options] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtllanguageversion/>
+#[repr(u64)]
+#[derive(Clone, Copy, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub enum MTLLanguageVersion {
+    V1_0 = 0x10000,
+    V1_1 = 0x10001,
+    V1_2 = 0x10002,
+    V2_0 = 0x20000,
+    V2_1 = 0x20001,
+    V2_2 = 0x20002,
+    /// available on macOS 11.0+, iOS 14.0+
+    V2_3 = 0x20003,
+    /// available on macOS 12.0+, iOS 15.0+
+    V2_4 = 0x20004,
+    /// available on macOS 13.0+, iOS 16.0+
+    V3_0 = 0x30000,
+    /// available on macOS 14.0+, iOS 17.0+
+    V3_1 = 0x30001,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlfunctionconstantvalues/>
+pub enum MTLFunctionConstantValues {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionConstantValues;
+    pub struct FunctionConstantValues;
+}
+
+impl FunctionConstantValues {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLFunctionConstantValues);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl FunctionConstantValuesRef {
+    pub fn set_constant_value_at_index(
+        &self,
+        value: *const c_void,
+        ty: MTLDataType,
+        index: NSUInteger,
+    ) {
+        unsafe { msg_send![self, setConstantValue:value type:ty atIndex:index] }
+    }
+
+    pub fn set_constant_values_with_range(
+        &self,
+        values: *const c_void,
+        ty: MTLDataType,
+        range: NSRange,
+    ) {
+        unsafe { msg_send![self, setConstantValues:values type:ty withRange:range] }
+    }
+
+    pub fn set_constant_value_with_name(&self, value: *const c_void, ty: MTLDataType, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            msg_send![self, setConstantValue:value type:ty withName:ns_name]
+        }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtllibrarytype/>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLLibraryType {
+    Executable = 0,
+    Dynamic = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcompileoptions/>
+pub enum MTLCompileOptions {}
+
+foreign_obj_type! {
+    type CType = MTLCompileOptions;
+    pub struct CompileOptions;
+}
+
+impl CompileOptions {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLCompileOptions);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl CompileOptionsRef {
+    pub unsafe fn preprocessor_macros(&self) -> *mut Object {
+        msg_send![self, preprocessorMacros]
+    }
+
+    pub unsafe fn set_preprocessor_macros(&self, defines: *mut Object) {
+        msg_send![self, setPreprocessorMacros: defines]
+    }
+
+    pub fn is_fast_math_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, fastMathEnabled] }
+    }
+
+    pub fn set_fast_math_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setFastMathEnabled: enabled] }
+    }
+
+    /// Only available on (macos(10.11), ios(9.0))
+    pub fn language_version(&self) -> MTLLanguageVersion {
+        unsafe { msg_send![self, languageVersion] }
+    }
+
+    /// Only available on (macos(10.11), ios(9.0))
+    pub fn set_language_version(&self, version: MTLLanguageVersion) {
+        unsafe { msg_send![self, setLanguageVersion: version] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn library_type(&self) -> MTLLibraryType {
+        unsafe { msg_send![self, libraryType] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn set_library_type(&self, lib_type: MTLLibraryType) {
+        unsafe { msg_send![self, setLibraryType: lib_type] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn install_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, installName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn set_install_name(&self, name: &str) {
+        unsafe {
+            let install_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setInstallName: install_name];
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// Marshal to Rust Vec
+    pub fn libraries(&self) -> Vec<DynamicLibrary> {
+        unsafe {
+            let libraries: *mut Object = msg_send![self, libraries];
+            let count: NSUInteger = msg_send![libraries, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let lib = msg_send![libraries, objectAtIndex: i];
+                    DynamicLibrary::from_ptr(lib)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// As raw NSArray
+    pub fn libraries_as_nsarray(&self) -> &ArrayRef<DynamicLibrary> {
+        unsafe { msg_send![self, libraries] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// Marshal from Rust slice
+    pub fn set_libraries(&self, libraries: &[&DynamicLibraryRef]) {
+        let ns_array = Array::<DynamicLibrary>::from_slice(libraries);
+        unsafe { msg_send![self, setLibraries: ns_array] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// From raw NSArray
+    pub fn set_libraries_nsarray(&self, libraries: &ArrayRef<DynamicLibrary>) {
+        unsafe { msg_send![self, setLibraries: libraries] }
+    }
+
+    /// Only available on (macos(11.0), macCatalyst(14.0), ios(13.0))
+    pub fn preserve_invariance(&self) -> bool {
+        unsafe { msg_send_bool![self, preserveInvariance] }
+    }
+
+    /// Only available on (macos(11.0), macCatalyst(14.0), ios(13.0))
+    pub fn set_preserve_invariance(&self, preserve: bool) {
+        unsafe { msg_send![self, setPreserveInvariance: preserve] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtllibraryerror/>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLLibraryError {
+    Unsupported = 1,
+    Internal = 2,
+    CompileFailure = 3,
+    CompileWarning = 4,
+    /// Only available on (macos(10.12), ios(10.0))
+    FunctionNotFound = 5,
+    /// Only available on (macos(10.12), ios(10.0))
+    FileNotFound = 6,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtllibrary/>
+pub enum MTLLibrary {}
+
+foreign_obj_type! {
+    type CType = MTLLibrary;
+    pub struct Library;
+}
+
+impl LibraryRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    // FIXME: should rename to new_function
+    pub fn get_function(
+        &self,
+        name: &str,
+        constants: Option<FunctionConstantValues>,
+    ) -> Result<Function, String> {
+        unsafe {
+            let nsname = crate::nsstring_from_str(name);
+
+            let function: *mut MTLFunction = match constants {
+                Some(c) => try_objc! { err => msg_send![self,
+                    newFunctionWithName: nsname.as_ref()
+                    constantValues: c.as_ref()
+                    error: &mut err
+                ]},
+                None => msg_send![self, newFunctionWithName: nsname.as_ref()],
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(format!("Function '{}' does not exist", name))
+            }
+        }
+    }
+
+    // TODO: get_function_async with completion handler
+
+    pub fn function_names(&self) -> Vec<String> {
+        unsafe {
+            let names: *mut Object = msg_send![self, functionNames];
+            let count: NSUInteger = msg_send![names, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let name = msg_send![names, objectAtIndex: i];
+                    nsstring_as_str(name).to_string()
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn library_type(&self) -> MTLLibraryType {
+        unsafe { msg_send![self, type] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn install_name(&self) -> Option<&str> {
+        unsafe {
+            let maybe_name: *mut Object = msg_send![self, installName];
+            maybe_name.as_ref().map(crate::nsstring_as_str)
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_function_with_descriptor(
+        &self,
+        descriptor: &FunctionDescriptorRef,
+    ) -> Result<Function, String> {
+        unsafe {
+            let function: *mut MTLFunction = try_objc! {
+                err => msg_send![self,
+                    newFunctionWithDescriptor: descriptor
+                    error: &mut err
+                ]
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(String::from("new_function_with_descriptor() failed"))
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_intersection_function_with_descriptor(
+        &self,
+        descriptor: &IntersectionFunctionDescriptorRef,
+    ) -> Result<Function, String> {
+        unsafe {
+            let function: *mut MTLFunction = try_objc! {
+                err => msg_send![self,
+                    newIntersectionFunctionWithDescriptor: descriptor
+                    error: &mut err
+                ]
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(String::from(
+                    "new_intersection_function_with_descriptor() failed",
+                ))
+            }
+        }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+///
+/// See <https://developer.apple.com/documentation/metal/mtldynamiclibraryerror/>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDynamicLibraryError {
+    None = 0,
+    InvalidFile = 1,
+    CompilationFailure = 2,
+    UnresolvedInstallName = 3,
+    DependencyLoadFailure = 4,
+    Unsupported = 5,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtldynamiclibrary/>
+pub enum MTLDynamicLibrary {}
+
+foreign_obj_type! {
+    type CType = MTLDynamicLibrary;
+    pub struct DynamicLibrary;
+}
+
+impl DynamicLibraryRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn install_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, installName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn serialize_to_url(&self, url: &URLRef) -> Result<bool, String> {
+        unsafe { msg_send_bool_error_check![self, serializeToURL: url] }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+///
+/// See <https://developer.apple.com/documentation/metal/mtlbinaryarchivedescriptor/>
+pub enum MTLBinaryArchiveDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBinaryArchiveDescriptor;
+    pub struct BinaryArchiveDescriptor;
+}
+
+impl BinaryArchiveDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLBinaryArchiveDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl BinaryArchiveDescriptorRef {
+    pub fn url(&self) -> &URLRef {
+        unsafe { msg_send![self, url] }
+    }
+    pub fn set_url(&self, url: &URLRef) {
+        unsafe { msg_send![self, setUrl: url] }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+///
+/// See <https://developer.apple.com/documentation/metal/mtlbinaryarchive/>
+pub enum MTLBinaryArchive {}
+
+foreign_obj_type! {
+    type CType = MTLBinaryArchive;
+    pub struct BinaryArchive;
+}
+
+impl BinaryArchiveRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn add_compute_pipeline_functions_with_descriptor(
+        &self,
+        descriptor: &ComputePipelineDescriptorRef,
+    ) -> Result<bool, String> {
+        unsafe {
+            msg_send_bool_error_check![self, addComputePipelineFunctionsWithDescriptor: descriptor]
+        }
+    }
+
+    pub fn add_render_pipeline_functions_with_descriptor(
+        &self,
+        descriptor: &RenderPipelineDescriptorRef,
+    ) -> Result<bool, String> {
+        unsafe {
+            msg_send_bool_error_check![self, addRenderPipelineFunctionsWithDescriptor: descriptor]
+        }
+    }
+
+    // TODO: addTileRenderPipelineFunctionsWithDescriptor
+    // - (BOOL)addTileRenderPipelineFunctionsWithDescriptor:(MTLTileRenderPipelineDescriptor *)descriptor
+    // error:(NSError * _Nullable *)error;
+
+    pub fn serialize_to_url(&self, url: &URLRef) -> Result<bool, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let result: BOOL = msg_send![self, serializeToURL:url
+                                                        error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                match result {
+                    YES => Ok(true),
+                    NO => Ok(false),
+                    #[cfg(not(target_arch = "aarch64"))]
+                    _ => unreachable!(),
+                }
+            }
+        }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+///
+/// See <https://developer.apple.com/documentation/metal/mtllinkedfunctions/>
+pub enum MTLLinkedFunctions {}
+
+foreign_obj_type! {
+    type CType = MTLLinkedFunctions;
+    pub struct LinkedFunctions;
+}
+
+impl LinkedFunctions {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLLinkedFunctions);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl LinkedFunctionsRef {
+    /// Marshal to Rust Vec
+    pub fn functions(&self) -> Vec<Function> {
+        unsafe {
+            let functions: *mut Object = msg_send![self, functions];
+            let count: NSUInteger = msg_send![functions, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let f = msg_send![functions, objectAtIndex: i];
+                    Function::from_ptr(f)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_functions(&self, functions: &[&FunctionRef]) {
+        let ns_array = Array::<Function>::from_slice(functions);
+        unsafe { msg_send![self, setFunctions: ns_array] }
+    }
+
+    /// Marshal to Rust Vec
+    pub fn binary_functions(&self) -> Vec<Function> {
+        unsafe {
+            let functions: *mut Object = msg_send![self, binaryFunctions];
+            let count: NSUInteger = msg_send![functions, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let f = msg_send![functions, objectAtIndex: i];
+                    Function::from_ptr(f)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_binary_functions(&self, functions: &[&FunctionRef]) {
+        let ns_array = Array::<Function>::from_slice(functions);
+        unsafe { msg_send![self, setBinaryFunctions: ns_array] }
+    }
+
+    // TODO: figure out NSDictionary wrapper
+    // TODO: groups
+    // @property (readwrite, nonatomic, copy, nullable) NSDictionary<NSString*, NSArray<id<MTLFunction>>*> *groups;
+}

vendor/metal/src/mps.rs

@@ -0,0 +1,575 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::BOOL;
+
+#[cfg_attr(
+    feature = "link",
+    link(name = "MetalPerformanceShaders", kind = "framework")
+)]
+extern "C" {
+    fn MPSSupportsMTLDevice(device: *const std::ffi::c_void) -> BOOL;
+}
+
+pub fn mps_supports_device(device: &DeviceRef) -> bool {
+    let b: BOOL = unsafe {
+        let ptr: *const DeviceRef = device;
+        MPSSupportsMTLDevice(ptr as _)
+    };
+    b == YES
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpskernel>
+pub enum MPSKernel {}
+
+foreign_obj_type! {
+    type CType = MPSKernel;
+    pub struct Kernel;
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsraydatatype>
+pub enum MPSRayDataType {
+    OriginDirection = 0,
+    OriginMinDistanceDirectionMaxDistance = 1,
+    OriginMaskDirectionMaxDistance = 2,
+}
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsraymaskoptions>
+    #[allow(non_upper_case_globals)]
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MPSRayMaskOptions: NSUInteger {
+        /// Enable primitive masks
+        const Primitive = 1;
+        /// Enable instance masks
+        const Instance = 2;
+    }
+}
+
+/// Options that determine the data contained in an intersection result.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsintersectiondatatype>
+pub enum MPSIntersectionDataType {
+    Distance = 0,
+    DistancePrimitiveIndex = 1,
+    DistancePrimitiveIndexCoordinates = 2,
+    DistancePrimitiveIndexInstanceIndex = 3,
+    DistancePrimitiveIndexInstanceIndexCoordinates = 4,
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsintersectiontype>
+pub enum MPSIntersectionType {
+    /// Find the closest intersection to the ray's origin along the ray direction.
+    /// This is potentially slower than `Any` but is well suited to primary visibility rays.
+    Nearest = 0,
+    /// Find any intersection along the ray direction. This is potentially faster than `Nearest` and
+    /// is well suited to shadow and occlusion rays.
+    Any = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsraymaskoperator>
+pub enum MPSRayMaskOperator {
+    /// Accept the intersection if `(primitive mask & ray mask) != 0`.
+    And = 0,
+    /// Accept the intersection if `~(primitive mask & ray mask) != 0`.
+    NotAnd = 1,
+    /// Accept the intersection if `(primitive mask | ray mask) != 0`.
+    Or = 2,
+    /// Accept the intersection if `~(primitive mask | ray mask) != 0`.
+    NotOr = 3,
+    /// Accept the intersection if `(primitive mask ^ ray mask) != 0`.
+    /// Note that this is equivalent to the "!=" operator.
+    Xor = 4,
+    /// Accept the intersection if `~(primitive mask ^ ray mask) != 0`.
+    /// Note that this is equivalent to the "==" operator.
+    NotXor = 5,
+    /// Accept the intersection if `(primitive mask < ray mask) != 0`.
+    LessThan = 6,
+    /// Accept the intersection if `(primitive mask <= ray mask) != 0`.
+    LessThanOrEqualTo = 7,
+    /// Accept the intersection if `(primitive mask > ray mask) != 0`.
+    GreaterThan = 8,
+    /// Accept the intersection if `(primitive mask >= ray mask) != 0`.
+    GreaterThanOrEqualTo = 9,
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpstriangleintersectiontesttype>
+pub enum MPSTriangleIntersectionTestType {
+    /// Use the default ray/triangle intersection test
+    Default = 0,
+    /// Use a watertight ray/triangle intersection test which avoids gaps along shared triangle edges.
+    /// Shared vertices may still have gaps.
+    /// This intersection test may be slower than `Default`.
+    Watertight = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsaccelerationstructurestatus>
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MPSAccelerationStructureStatus {
+    Unbuilt = 0,
+    Built = 1,
+}
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsaccelerationstructureusage>
+    #[allow(non_upper_case_globals)]
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MPSAccelerationStructureUsage: NSUInteger {
+        /// No usage options specified
+        const None = 0;
+        /// Option that enables support for refitting the acceleration structure after it has been built.
+        const Refit = 1;
+        /// Option indicating that the acceleration structure will be rebuilt frequently.
+        const FrequentRebuild = 2;
+        const PreferGPUBuild = 4;
+        const PreferCPUBuild = 8;
+    }
+}
+
+/// A common bit for all floating point data types.
+const MPSDataTypeFloatBit: isize = 0x10000000;
+const MPSDataTypeSignedBit: isize = 0x20000000;
+const MPSDataTypeNormalizedBit: isize = 0x40000000;
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsdatatype>
+pub enum MPSDataType {
+    Invalid = 0,
+
+    Float32 = MPSDataTypeFloatBit | 32,
+    Float16 = MPSDataTypeFloatBit | 16,
+
+    // Signed integers.
+    Int8 = MPSDataTypeSignedBit | 8,
+    Int16 = MPSDataTypeSignedBit | 16,
+    Int32 = MPSDataTypeSignedBit | 32,
+
+    // Unsigned integers. Range: [0, UTYPE_MAX]
+    UInt8 = 8,
+    UInt16 = 16,
+    UInt32 = 32,
+
+    // Unsigned normalized. Range: [0, 1.0]
+    Unorm1 = MPSDataTypeNormalizedBit | 1,
+    Unorm8 = MPSDataTypeNormalizedBit | 8,
+}
+
+/// A kernel that performs intersection tests between rays and geometry.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsrayintersector>
+pub enum MPSRayIntersector {}
+
+foreign_obj_type! {
+    type CType = MPSRayIntersector;
+    pub struct RayIntersector;
+    type ParentType = Kernel;
+}
+
+impl RayIntersector {
+    pub fn from_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let intersector: RayIntersector = msg_send![class!(MPSRayIntersector), alloc];
+            let ptr: *mut Object = msg_send![intersector.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(intersector)
+            }
+        }
+    }
+}
+
+impl RayIntersectorRef {
+    pub fn set_cull_mode(&self, mode: MTLCullMode) {
+        unsafe { msg_send![self, setCullMode: mode] }
+    }
+
+    pub fn set_front_facing_winding(&self, winding: MTLWinding) {
+        unsafe { msg_send![self, setFrontFacingWinding: winding] }
+    }
+
+    pub fn set_intersection_data_type(&self, options: MPSIntersectionDataType) {
+        unsafe { msg_send![self, setIntersectionDataType: options] }
+    }
+
+    pub fn set_intersection_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setIntersectionStride: stride] }
+    }
+
+    pub fn set_ray_data_type(&self, ty: MPSRayDataType) {
+        unsafe { msg_send![self, setRayDataType: ty] }
+    }
+
+    pub fn set_ray_index_data_type(&self, ty: MPSDataType) {
+        unsafe { msg_send![self, setRayIndexDataType: ty] }
+    }
+
+    pub fn set_ray_mask(&self, ray_mask: u32) {
+        unsafe { msg_send![self, setRayMask: ray_mask] }
+    }
+
+    pub fn set_ray_mask_operator(&self, operator: MPSRayMaskOperator) {
+        unsafe { msg_send![self, setRayMaskOperator: operator] }
+    }
+
+    pub fn set_ray_mask_options(&self, options: MPSRayMaskOptions) {
+        unsafe { msg_send![self, setRayMaskOptions: options] }
+    }
+
+    pub fn set_ray_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setRayStride: stride] }
+    }
+
+    pub fn set_triangle_intersection_test_type(&self, test_type: MPSTriangleIntersectionTestType) {
+        unsafe { msg_send![self, setTriangleIntersectionTestType: test_type] }
+    }
+
+    pub fn encode_intersection_to_command_buffer(
+        &self,
+        command_buffer: &CommandBufferRef,
+        intersection_type: MPSIntersectionType,
+        ray_buffer: &BufferRef,
+        ray_buffer_offset: NSUInteger,
+        intersection_buffer: &BufferRef,
+        intersection_buffer_offset: NSUInteger,
+        ray_count: NSUInteger,
+        acceleration_structure: &AccelerationStructureRef,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                encodeIntersectionToCommandBuffer: command_buffer
+                intersectionType: intersection_type
+                rayBuffer: ray_buffer
+                rayBufferOffset: ray_buffer_offset
+                intersectionBuffer: intersection_buffer
+                intersectionBufferOffset: intersection_buffer_offset
+                rayCount: ray_count
+                accelerationStructure: acceleration_structure
+            ]
+        }
+    }
+
+    pub fn recommended_minimum_ray_batch_size_for_ray_count(
+        &self,
+        ray_count: NSUInteger,
+    ) -> NSUInteger {
+        unsafe { msg_send![self, recommendedMinimumRayBatchSizeForRayCount: ray_count] }
+    }
+}
+
+/// A group of acceleration structures which may be used together in an instance acceleration structure.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsaccelerationstructuregroup>
+pub enum MPSAccelerationStructureGroup {}
+
+foreign_obj_type! {
+    type CType = MPSAccelerationStructureGroup;
+    pub struct AccelerationStructureGroup;
+}
+
+impl AccelerationStructureGroup {
+    pub fn new_with_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let group: AccelerationStructureGroup =
+                msg_send![class!(MPSAccelerationStructureGroup), alloc];
+            let ptr: *mut Object = msg_send![group.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(group)
+            }
+        }
+    }
+}
+
+impl AccelerationStructureGroupRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}
+
+/// The base class for data structures that are built over geometry and used to accelerate ray tracing.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsaccelerationstructure>
+pub enum MPSAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSAccelerationStructure;
+    pub struct AccelerationStructure;
+}
+
+impl AccelerationStructureRef {
+    pub fn status(&self) -> MPSAccelerationStructureStatus {
+        unsafe { msg_send![self, status] }
+    }
+
+    pub fn usage(&self) -> MPSAccelerationStructureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    pub fn set_usage(&self, usage: MPSAccelerationStructureUsage) {
+        unsafe { msg_send![self, setUsage: usage] }
+    }
+
+    pub fn group(&self) -> &AccelerationStructureGroupRef {
+        unsafe { msg_send![self, group] }
+    }
+
+    pub fn encode_refit_to_command_buffer(&self, buffer: &CommandBufferRef) {
+        unsafe { msg_send![self, encodeRefitToCommandBuffer: buffer] }
+    }
+
+    pub fn rebuild(&self) {
+        unsafe { msg_send![self, rebuild] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpspolygonaccelerationstructure>
+pub enum MPSPolygonAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSPolygonAccelerationStructure;
+    pub struct PolygonAccelerationStructure;
+    type ParentType = AccelerationStructure;
+}
+
+impl PolygonAccelerationStructureRef {
+    pub fn set_index_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setIndexBuffer: buffer] }
+    }
+
+    pub fn set_index_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setIndexBufferOffset: offset] }
+    }
+
+    pub fn set_index_type(&self, data_type: MPSDataType) {
+        unsafe { msg_send![self, setIndexType: data_type] }
+    }
+
+    pub fn set_mask_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setMaskBuffer: buffer] }
+    }
+
+    pub fn set_mask_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMaskBufferOffset: offset] }
+    }
+
+    pub fn set_vertex_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setVertexBuffer: buffer] }
+    }
+
+    pub fn set_vertex_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setVertexBufferOffset: offset] }
+    }
+
+    pub fn set_vertex_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setVertexStride: stride] }
+    }
+}
+
+/// An acceleration structure built over triangles.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpstriangleaccelerationstructure>
+pub enum MPSTriangleAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSTriangleAccelerationStructure;
+    pub struct TriangleAccelerationStructure;
+    type ParentType = PolygonAccelerationStructure;
+}
+
+impl TriangleAccelerationStructure {
+    pub fn from_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let structure: TriangleAccelerationStructure =
+                msg_send![class!(MPSTriangleAccelerationStructure), alloc];
+            let ptr: *mut Object = msg_send![structure.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(structure)
+            }
+        }
+    }
+}
+
+impl TriangleAccelerationStructureRef {
+    pub fn triangle_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, triangleCount] }
+    }
+
+    pub fn set_triangle_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setTriangleCount: count] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpstransformtype>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MPSTransformType {
+    Float4x4 = 0,
+    Identity = 1,
+}
+
+/// An acceleration structure built over instances of other acceleration structures
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsinstanceaccelerationstructure>
+pub enum MPSInstanceAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSInstanceAccelerationStructure;
+    pub struct InstanceAccelerationStructure;
+    type ParentType = AccelerationStructure;
+}
+
+impl InstanceAccelerationStructure {
+    pub fn init_with_group(group: &AccelerationStructureGroupRef) -> Option<Self> {
+        unsafe {
+            let structure: InstanceAccelerationStructure =
+                msg_send![class!(MPSInstanceAccelerationStructure), alloc];
+            let ptr: *mut Object = msg_send![structure.as_ref(), initWithGroup: group];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(structure)
+            }
+        }
+    }
+}
+
+impl InstanceAccelerationStructureRef {
+    /// Marshal to Rust Vec
+    pub fn acceleration_structures(&self) -> Vec<PolygonAccelerationStructure> {
+        unsafe {
+            let acs: *mut Object = msg_send![self, accelerationStructures];
+            let count: NSUInteger = msg_send![acs, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let ac = msg_send![acs, objectAtIndex: i];
+                    PolygonAccelerationStructure::from_ptr(ac)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_acceleration_structures(&self, acs: &[&PolygonAccelerationStructureRef]) {
+        let ns_array = Array::<PolygonAccelerationStructure>::from_slice(acs);
+        unsafe { msg_send![self, setAccelerationStructures: ns_array] }
+    }
+
+    pub fn instance_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, instanceBuffer] }
+    }
+
+    pub fn set_instance_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setInstanceBuffer: buffer] }
+    }
+
+    pub fn instance_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, instanceBufferOffset] }
+    }
+
+    pub fn set_instance_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setInstanceBufferOffset: offset] }
+    }
+
+    pub fn transform_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, transformBuffer] }
+    }
+
+    pub fn set_transform_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setTransformBuffer: buffer] }
+    }
+
+    pub fn transform_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, transformBufferOffset] }
+    }
+
+    pub fn set_transform_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setTransformBufferOffset: offset] }
+    }
+
+    pub fn transform_type(&self) -> MPSTransformType {
+        unsafe { msg_send![self, transformType] }
+    }
+
+    pub fn set_transform_type(&self, transform_type: MPSTransformType) {
+        unsafe { msg_send![self, setTransformType: transform_type] }
+    }
+
+    pub fn mask_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, maskBuffer] }
+    }
+
+    pub fn set_mask_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setMaskBuffer: buffer] }
+    }
+
+    pub fn mask_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, maskBufferOffset] }
+    }
+
+    pub fn set_mask_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMaskBufferOffset: offset] }
+    }
+
+    pub fn instance_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, instanceCount] }
+    }
+
+    pub fn set_instance_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setInstanceCount: count] }
+    }
+}
+
+#[repr(C)]
+pub struct MPSPackedFloat3 {
+    pub elements: [f32; 3],
+}
+
+/// Represents a 3D ray with an origin, a direction, and an intersection distance range from the origin.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsrayoriginmindistancedirectionmaxdistance>
+#[repr(C)]
+pub struct MPSRayOriginMinDistanceDirectionMaxDistance {
+    /// Ray origin. The intersection test will be skipped if the origin contains NaNs or infinities.
+    pub origin: MPSPackedFloat3,
+    /// Minimum intersection distance from the origin along the ray direction.
+    /// The intersection test will be skipped if the minimum distance is equal to positive infinity or NaN.
+    pub min_distance: f32,
+    /// Ray direction. Does not need to be normalized. The intersection test will be skipped if
+    /// the direction has length zero or contains NaNs or infinities.
+    pub direction: MPSPackedFloat3,
+    /// Maximum intersection distance from the origin along the ray direction. May be infinite.
+    /// The intersection test will be skipped if the maximum distance is less than zero, NaN, or
+    /// less than the minimum intersection distance.
+    pub max_distance: f32,
+}
+
+/// Intersection result which contains the distance from the ray origin to the intersection point,
+/// the index of the intersected primitive, and the first two barycentric coordinates of the intersection point.
+///
+/// See <https://developer.apple.com/documentation/metalperformanceshaders/mpsintersectiondistanceprimitiveindexcoordinates>
+#[repr(C)]
+pub struct MPSIntersectionDistancePrimitiveIndexCoordinates {
+    /// Distance from the ray origin to the intersection point along the ray direction vector such
+    /// that `intersection = ray.origin + ray.direction * distance`.
+    /// Is negative if there is no intersection. If the intersection type is `MPSIntersectionTypeAny`,
+    /// is a positive value for a hit or a negative value for a miss.
+    pub distance: f32,
+    /// Index of the intersected primitive. Undefined if the ray does not intersect a primitive or
+    /// if the intersection type is `MPSIntersectionTypeAny`.
+    pub primitive_index: u32,
+    /// The first two barycentric coordinates `U` and `V` of the intersection point.
+    /// The third coordinate `W = 1 - U - V`. Undefined if the ray does not intersect a primitive or
+    /// if the intersection type is `MPSIntersectionTypeAny`.
+    pub coordinates: [f32; 2],
+}

vendor/metal/src/pipeline/compute.rs

@@ -0,0 +1,475 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtlattributeformat>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLAttributeFormat {
+    Invalid = 0,
+    UChar2 = 1,
+    UChar3 = 2,
+    UChar4 = 3,
+    Char2 = 4,
+    Char3 = 5,
+    Char4 = 6,
+    UChar2Normalized = 7,
+    UChar3Normalized = 8,
+    UChar4Normalized = 9,
+    Char2Normalized = 10,
+    Char3Normalized = 11,
+    Char4Normalized = 12,
+    UShort2 = 13,
+    UShort3 = 14,
+    UShort4 = 15,
+    Short2 = 16,
+    Short3 = 17,
+    Short4 = 18,
+    UShort2Normalized = 19,
+    UShort3Normalized = 20,
+    UShort4Normalized = 21,
+    Short2Normalized = 22,
+    Short3Normalized = 23,
+    Short4Normalized = 24,
+    Half2 = 25,
+    Half3 = 26,
+    Half4 = 27,
+    Float = 28,
+    Float2 = 29,
+    Float3 = 30,
+    Float4 = 31,
+    Int = 32,
+    Int2 = 33,
+    Int3 = 34,
+    Int4 = 35,
+    UInt = 36,
+    UInt2 = 37,
+    UInt3 = 38,
+    UInt4 = 39,
+    Int1010102Normalized = 40,
+    UInt1010102Normalized = 41,
+    UChar4Normalized_BGRA = 42,
+    UChar = 45,
+    Char = 46,
+    UCharNormalized = 47,
+    CharNormalized = 48,
+    UShort = 49,
+    Short = 50,
+    UShortNormalized = 51,
+    ShortNormalized = 52,
+    Half = 53,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstepfunction>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLStepFunction {
+    Constant = 0,
+    PerInstance = 1,
+    PerPatch = 2,
+    PerPatchControlPoint = 3,
+    PerVertex = 4,
+    ThreadPositionInGridX = 5,
+    ThreadPositionInGridXIndexed = 6,
+    ThreadPositionInGridY = 7,
+    ThreadPositionInGridYIndexed = 8,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepipelinedescriptor>
+pub enum MTLComputePipelineDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineDescriptor;
+    pub struct ComputePipelineDescriptor;
+}
+
+impl ComputePipelineDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLComputePipelineDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl ComputePipelineDescriptorRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn compute_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, computeFunction] }
+    }
+
+    pub fn set_compute_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setComputeFunction: function] }
+    }
+
+    pub fn thread_group_size_is_multiple_of_thread_execution_width(&self) -> bool {
+        unsafe { msg_send_bool![self, threadGroupSizeIsMultipleOfThreadExecutionWidth] }
+    }
+
+    pub fn set_thread_group_size_is_multiple_of_thread_execution_width(
+        &self,
+        size_is_multiple_of_width: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setThreadGroupSizeIsMultipleOfThreadExecutionWidth: size_is_multiple_of_width
+            ]
+        }
+    }
+
+    /// API_AVAILABLE(macos(10.14), ios(12.0));
+    pub fn max_total_threads_per_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerThreadgroup] }
+    }
+
+    /// API_AVAILABLE(macos(10.14), ios(12.0));
+    pub fn set_max_total_threads_per_threadgroup(&self, max_total_threads: NSUInteger) {
+        unsafe { msg_send![self, setMaxTotalThreadsPerThreadgroup: max_total_threads] }
+    }
+
+    /// API_AVAILABLE(ios(13.0),macos(11.0));
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe { msg_send_bool![self, supportIndirectCommandBuffers] }
+    }
+
+    /// API_AVAILABLE(ios(13.0),macos(11.0));
+    pub fn set_support_indirect_command_buffers(&self, support: bool) {
+        unsafe { msg_send![self, setSupportIndirectCommandBuffers: support] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn support_adding_binary_functions(&self) -> bool {
+        unsafe { msg_send_bool![self, supportAddingBinaryFunctions] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_support_adding_binary_functions(&self, support: bool) {
+        unsafe { msg_send![self, setSupportAddingBinaryFunctions: support] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn max_call_stack_depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxCallStackDepth] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_max_call_stack_depth(&self, depth: NSUInteger) {
+        unsafe { msg_send![self, setMaxCallStackDepth: depth] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn insert_libraries(&self) -> Vec<DynamicLibrary> {
+        unsafe {
+            let libraries: *mut Object = msg_send![self, insertLibraries];
+            let count: NSUInteger = msg_send![libraries, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let lib = msg_send![libraries, objectAtIndex: i];
+                    DynamicLibrary::from_ptr(lib)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_insert_libraries(&self, libraries: &[&DynamicLibraryRef]) {
+        let ns_array = Array::<DynamicLibrary>::from_slice(libraries);
+        unsafe { msg_send![self, setInsertLibraries: ns_array] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn binary_archives(&self) -> Vec<BinaryArchive> {
+        unsafe {
+            let archives: *mut Object = msg_send![self, binaryArchives];
+            let count: NSUInteger = msg_send![archives, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let a = msg_send![archives, objectAtIndex: i];
+                    BinaryArchive::from_ptr(a)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal from Rust slice
+    pub fn set_binary_archives(&self, archives: &[&BinaryArchiveRef]) {
+        let ns_array = Array::<BinaryArchive>::from_slice(archives);
+        unsafe { msg_send![self, setBinaryArchives: ns_array] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn linked_functions(&self) -> &LinkedFunctionsRef {
+        unsafe { msg_send![self, linkedFunctions] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_linked_functions(&self, functions: &LinkedFunctionsRef) {
+        unsafe { msg_send![self, setLinkedFunctions: functions] }
+    }
+
+    pub fn stage_input_descriptor(&self) -> Option<&StageInputOutputDescriptorRef> {
+        unsafe { msg_send![self, stageInputDescriptor] }
+    }
+
+    pub fn set_stage_input_descriptor(&self, descriptor: Option<&StageInputOutputDescriptorRef>) {
+        unsafe { msg_send![self, setStageInputDescriptor: descriptor] }
+    }
+
+    pub fn buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, buffers] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepipelinestate>
+pub enum MTLComputePipelineState {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineState;
+    pub struct ComputePipelineState;
+}
+
+impl ComputePipelineStateRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn max_total_threads_per_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerThreadgroup] }
+    }
+
+    pub fn thread_execution_width(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadExecutionWidth] }
+    }
+
+    pub fn static_threadgroup_memory_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, staticThreadgroupMemoryLength] }
+    }
+
+    /// Only available on (ios(11.0), macos(11.0), macCatalyst(14.0)) NOT available on (tvos)
+    pub fn imageblock_memory_length_for_dimensions(&self, dimensions: MTLSize) -> NSUInteger {
+        unsafe { msg_send![self, imageblockMemoryLengthForDimensions: dimensions] }
+    }
+
+    /// Only available on (ios(13.0), macos(11.0))
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe { msg_send_bool![self, supportIndirectCommandBuffers] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn function_handle_with_function(
+        &self,
+        function: &FunctionRef,
+    ) -> Option<&FunctionHandleRef> {
+        unsafe { msg_send![self, functionHandleWithFunction: function] }
+    }
+
+    // API_AVAILABLE(macos(11.0), ios(14.0));
+    // TODO: newComputePipelineStateWithAdditionalBinaryFunctions
+    // - (nullable id <MTLComputePipelineState>)newComputePipelineStateWithAdditionalBinaryFunctions:(nonnull NSArray<id<MTLFunction>> *)functions error:(__autoreleasing NSError **)error
+
+    // API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn new_visible_function_table_with_descriptor(
+        &self,
+        descriptor: &VisibleFunctionTableDescriptorRef,
+    ) -> VisibleFunctionTable {
+        unsafe { msg_send![self, newVisibleFunctionTableWithDescriptor: descriptor ] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_intersection_function_table_with_descriptor(
+        &self,
+        descriptor: &IntersectionFunctionTableDescriptorRef,
+    ) -> IntersectionFunctionTable {
+        unsafe { msg_send![self, newIntersectionFunctionTableWithDescriptor: descriptor] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstageinputoutputdescriptor>
+pub enum MTLStageInputOutputDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLStageInputOutputDescriptor;
+    pub struct StageInputOutputDescriptor;
+}
+
+impl StageInputOutputDescriptor {
+    pub fn new<'a>() -> &'a StageInputOutputDescriptorRef {
+        unsafe {
+            let class = class!(MTLStageInputOutputDescriptor);
+            msg_send![class, stageInputOutputDescriptor]
+        }
+    }
+}
+
+impl StageInputOutputDescriptorRef {
+    pub fn attributes(&self) -> Option<&AttributeDescriptorArrayRef> {
+        unsafe { msg_send![self, attributes] }
+    }
+
+    pub fn index_buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, indexBufferIndex] }
+    }
+
+    pub fn set_index_buffer_index(&self, idx_buffer_idx: NSUInteger) {
+        unsafe { msg_send![self, setIndexBufferIndex: idx_buffer_idx] }
+    }
+
+    pub fn index_type(&self) -> MTLIndexType {
+        unsafe { msg_send![self, indexType] }
+    }
+
+    pub fn set_index_type(&self, index_ty: MTLIndexType) {
+        unsafe { msg_send![self, setIndexType: index_ty] }
+    }
+
+    pub fn layouts(&self) -> Option<&BufferLayoutDescriptorArrayRef> {
+        unsafe { msg_send![self, layouts] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlattributedescriptorarray>
+pub enum MTLAttributeDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLAttributeDescriptorArray;
+    pub struct AttributeDescriptorArray;
+}
+
+impl AttributeDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&AttributeDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(&self, index: NSUInteger, buffer_desc: Option<&AttributeDescriptorRef>) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlattributedescriptor>
+pub enum MTLAttributeDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAttributeDescriptor;
+    pub struct AttributeDescriptor;
+}
+
+impl AttributeDescriptorRef {
+    pub fn buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferIndex] }
+    }
+
+    pub fn set_buffer_index(&self, buffer_index: NSUInteger) {
+        unsafe { msg_send![self, setBufferIndex: buffer_index] }
+    }
+
+    pub fn format(&self) -> MTLAttributeFormat {
+        unsafe { msg_send![self, format] }
+    }
+
+    pub fn set_format(&self, format: MTLAttributeFormat) {
+        unsafe { msg_send![self, setFormat: format] }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn set_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setOffset: offset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlbufferlayoutdescriptorarray>
+pub enum MTLBufferLayoutDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLBufferLayoutDescriptorArray;
+    pub struct BufferLayoutDescriptorArray;
+}
+
+impl BufferLayoutDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&BufferLayoutDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        buffer_desc: Option<&BufferLayoutDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlbufferlayoutdescriptor>
+pub enum MTLBufferLayoutDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBufferLayoutDescriptor;
+    pub struct BufferLayoutDescriptor;
+}
+
+impl BufferLayoutDescriptorRef {
+    pub fn step_function(&self) -> MTLStepFunction {
+        unsafe { msg_send![self, stepFunction] }
+    }
+
+    pub fn set_step_function(&self, step_function: MTLStepFunction) {
+        unsafe { msg_send![self, setStepFunction: step_function] }
+    }
+
+    pub fn step_rate(&self) -> NSUInteger {
+        unsafe { msg_send![self, stepRate] }
+    }
+
+    pub fn set_step_rate(&self, step_rate: NSUInteger) {
+        unsafe { msg_send![self, setStepRate: step_rate] }
+    }
+
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn set_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setStride: stride] }
+    }
+}

vendor/metal/src/pipeline/mod.rs

@@ -0,0 +1,71 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+mod compute;
+mod render;
+
+pub use self::compute::*;
+pub use self::render::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlmutability>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLMutability {
+    Default = 0,
+    Mutable = 1,
+    Immutable = 2,
+}
+
+impl Default for MTLMutability {
+    #[inline]
+    fn default() -> Self {
+        MTLMutability::Default
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlpipelinebufferdescriptorarray>
+pub enum MTLPipelineBufferDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLPipelineBufferDescriptorArray;
+    pub struct PipelineBufferDescriptorArray;
+}
+
+impl PipelineBufferDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&PipelineBufferDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        buffer_desc: Option<&PipelineBufferDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlpipelinebufferdescriptor>
+pub enum MTLPipelineBufferDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLPipelineBufferDescriptor;
+    pub struct PipelineBufferDescriptor;
+}
+
+impl PipelineBufferDescriptorRef {
+    pub fn mutability(&self) -> MTLMutability {
+        unsafe { msg_send![self, mutability] }
+    }
+
+    pub fn set_mutability(&self, new_mutability: MTLMutability) {
+        unsafe { msg_send![self, setMutability: new_mutability] }
+    }
+}

vendor/metal/src/pipeline/render.rs

@@ -0,0 +1,762 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtlblendfactor>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLBlendFactor {
+    Zero = 0,
+    One = 1,
+    SourceColor = 2,
+    OneMinusSourceColor = 3,
+    SourceAlpha = 4,
+    OneMinusSourceAlpha = 5,
+    DestinationColor = 6,
+    OneMinusDestinationColor = 7,
+    DestinationAlpha = 8,
+    OneMinusDestinationAlpha = 9,
+    SourceAlphaSaturated = 10,
+    BlendColor = 11,
+    OneMinusBlendColor = 12,
+    BlendAlpha = 13,
+    OneMinusBlendAlpha = 14,
+    Source1Color = 15,
+    OneMinusSource1Color = 16,
+    Source1Alpha = 17,
+    OneMinusSource1Alpha = 18,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlblendoperation>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLBlendOperation {
+    Add = 0,
+    Subtract = 1,
+    ReverseSubtract = 2,
+    Min = 3,
+    Max = 4,
+}
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metal/mtlcolorwritemask>
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLColorWriteMask: NSUInteger {
+        const None  = 0;
+        const Red   = 0x1 << 3;
+        const Green = 0x1 << 2;
+        const Blue  = 0x1 << 1;
+        const Alpha = 0x1 << 0;
+        const All   = 0xf;
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlprimitivetopologyclass>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPrimitiveTopologyClass {
+    Unspecified = 0,
+    Point = 1,
+    Line = 2,
+    Triangle = 3,
+}
+
+// TODO: MTLTessellationPartitionMode
+// TODO: MTLTessellationFactorStepFunction
+// TODO: MTLTessellationFactorFormat
+// TODO: MTLTessellationControlPointIndexType
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinecolorattachmentdescriptor>
+pub enum MTLRenderPipelineColorAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineColorAttachmentDescriptor;
+    pub struct RenderPipelineColorAttachmentDescriptor;
+}
+
+impl RenderPipelineColorAttachmentDescriptorRef {
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn is_blending_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isBlendingEnabled] }
+    }
+
+    pub fn set_blending_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setBlendingEnabled: enabled] }
+    }
+
+    pub fn source_rgb_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, sourceRGBBlendFactor] }
+    }
+
+    pub fn set_source_rgb_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setSourceRGBBlendFactor: blend_factor] }
+    }
+
+    pub fn destination_rgb_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, destinationRGBBlendFactor] }
+    }
+
+    pub fn set_destination_rgb_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setDestinationRGBBlendFactor: blend_factor] }
+    }
+
+    pub fn rgb_blend_operation(&self) -> MTLBlendOperation {
+        unsafe { msg_send![self, rgbBlendOperation] }
+    }
+
+    pub fn set_rgb_blend_operation(&self, blend_operation: MTLBlendOperation) {
+        unsafe { msg_send![self, setRgbBlendOperation: blend_operation] }
+    }
+
+    pub fn source_alpha_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, sourceAlphaBlendFactor] }
+    }
+
+    pub fn set_source_alpha_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setSourceAlphaBlendFactor: blend_factor] }
+    }
+
+    pub fn destination_alpha_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, destinationAlphaBlendFactor] }
+    }
+
+    pub fn set_destination_alpha_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setDestinationAlphaBlendFactor: blend_factor] }
+    }
+
+    pub fn alpha_blend_operation(&self) -> MTLBlendOperation {
+        unsafe { msg_send![self, alphaBlendOperation] }
+    }
+
+    pub fn set_alpha_blend_operation(&self, blend_operation: MTLBlendOperation) {
+        unsafe { msg_send![self, setAlphaBlendOperation: blend_operation] }
+    }
+
+    pub fn write_mask(&self) -> MTLColorWriteMask {
+        unsafe { msg_send![self, writeMask] }
+    }
+
+    pub fn set_write_mask(&self, mask: MTLColorWriteMask) {
+        unsafe { msg_send![self, setWriteMask: mask] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinereflection>
+pub enum MTLRenderPipelineReflection {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineReflection;
+    pub struct RenderPipelineReflection;
+}
+
+impl RenderPipelineReflection {
+    #[cfg(feature = "private")]
+    pub unsafe fn new(
+        vertex_data: *mut std::ffi::c_void,
+        fragment_data: *mut std::ffi::c_void,
+        vertex_desc: *mut std::ffi::c_void,
+        device: &DeviceRef,
+        options: u64,
+        flags: u64,
+    ) -> Self {
+        let class = class!(MTLRenderPipelineReflection);
+        let this: RenderPipelineReflection = msg_send![class, alloc];
+        let this_alias: *mut Object = msg_send![this.as_ref(), initWithVertexData:vertex_data
+                                                                fragmentData:fragment_data
+                                                serializedVertexDescriptor:vertex_desc
+                                                                    device:device
+                                                                    options:options
+                                                                        flags:flags];
+        if this_alias.is_null() {
+            panic!("[MTLRenderPipelineReflection init] failed");
+        }
+        this
+    }
+}
+
+impl RenderPipelineReflectionRef {
+    /// An array of objects that describe the arguments of a fragment function.
+    pub fn fragment_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, fragmentArguments] }
+    }
+
+    /// An array of objects that describe the arguments of a vertex function.
+    pub fn vertex_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, vertexArguments] }
+    }
+
+    /// An array of objects that describe the arguments of a tile shading function.
+    pub fn tile_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, tileArguments] }
+    }
+}
+
+/// TODO: Find documentation link.
+pub enum MTLArgumentArray {}
+
+foreign_obj_type! {
+    type CType = MTLArgumentArray;
+    pub struct ArgumentArray;
+}
+
+impl ArgumentArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&ArgumentRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn count(&self) -> NSUInteger {
+        unsafe { msg_send![self, count] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcomputepipelinereflection>
+pub enum MTLComputePipelineReflection {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineReflection;
+    pub struct ComputePipelineReflection;
+}
+
+impl ComputePipelineReflectionRef {
+    /// An array of objects that describe the arguments of a compute function.
+    pub fn arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, arguments] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlmeshrenderpipelinedescriptor>
+/// Only available in (macos(13.0), ios(16.0))
+pub enum MTLMeshRenderPipelineDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLMeshRenderPipelineDescriptor;
+    pub struct MeshRenderPipelineDescriptor;
+}
+
+impl MeshRenderPipelineDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLMeshRenderPipelineDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl MeshRenderPipelineDescriptorRef {
+    pub fn color_attachments(&self) -> &RenderPipelineColorAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, colorAttachments] }
+    }
+
+    pub fn depth_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, depthAttachmentPixelFormat] }
+    }
+
+    pub fn set_depth_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setDepthAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn fragment_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, fragmentBuffers] }
+    }
+
+    pub fn fragment_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, fragmentFunction] }
+    }
+
+    pub fn set_fragment_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setFragmentFunction: function] }
+    }
+
+    pub fn is_alpha_to_coverage_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isAlphaToCoverageEnabled] }
+    }
+
+    pub fn set_alpha_to_coverage_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToCoverageEnabled: enabled] }
+    }
+
+    pub fn is_alpha_to_one_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isAlphaToOneEnabled] }
+    }
+
+    pub fn set_alpha_to_one_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToOneEnabled: enabled] }
+    }
+
+    pub fn is_rasterization_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isRasterizationEnabled] }
+    }
+
+    pub fn set_rasterization_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setRasterizationEnabled: enabled] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn max_total_threadgroups_per_mesh_grid(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadgroupsPerMeshGrid] }
+    }
+
+    pub fn set_max_total_threadgroups_per_mesh_grid(
+        &self,
+        max_total_threadgroups_per_mesh_grid: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setMaxTotalThreadgroupsPerMeshGrid: max_total_threadgroups_per_mesh_grid
+            ]
+        }
+    }
+
+    pub fn max_total_threads_per_mesh_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerMeshThreadgroup] }
+    }
+
+    pub fn set_max_total_threads_per_mesh_threadgroup(
+        &self,
+        max_total_threads_per_mesh_threadgroup: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setMaxTotalThreadsPerMeshThreadgroup: max_total_threads_per_mesh_threadgroup
+            ]
+        }
+    }
+
+    pub fn max_total_threads_per_object_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerObjectThreadgroup] }
+    }
+
+    pub fn set_max_total_threads_per_object_threadgroup(
+        &self,
+        max_total_threads_per_object_threadgroup: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setMaxTotalThreadsPerObjectThreadgroup: max_total_threads_per_object_threadgroup
+            ]
+        }
+    }
+
+    pub fn max_vertex_amplification_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxVertexAmplificationCount] }
+    }
+
+    pub fn set_max_vertex_amplification_count(&self, max_vertex_amplification_count: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setMaxVertexAmplificationCount: max_vertex_amplification_count
+            ]
+        }
+    }
+
+    pub fn mesh_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, meshBuffers] }
+    }
+
+    pub fn mesh_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, meshFunction] }
+    }
+
+    pub fn set_mesh_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setMeshFunction: function] }
+    }
+
+    pub fn mesh_threadgroup_size_is_multiple_of_thread_execution_width(&self) -> bool {
+        unsafe { msg_send_bool![self, isMeshThreadgroupSizeIsMultipleOfThreadExecutionWidth] }
+    }
+
+    pub fn set_mesh_threadgroup_size_is_multiple_of_thread_execution_width(
+        &self,
+        mesh_threadgroup_size_is_multiple_of_thread_execution_width: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setMeshThreadgroupSizeIsMultipleOfThreadExecutionWidth:
+                    mesh_threadgroup_size_is_multiple_of_thread_execution_width
+            ]
+        }
+    }
+
+    pub fn object_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, objectBuffers] }
+    }
+
+    pub fn object_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, objectFunction] }
+    }
+
+    pub fn set_object_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setObjectFunction: function] }
+    }
+
+    pub fn object_threadgroup_size_is_multiple_of_thread_execution_width(&self) -> bool {
+        unsafe {
+            msg_send_bool![
+                self,
+                isObjectThreadgroupSizeIsMultipleOfThreadExecutionWidth
+            ]
+        }
+    }
+
+    pub fn set_object_threadgroup_size_is_multiple_of_thread_execution_width(
+        &self,
+        object_threadgroup_size_is_multiple_of_thread_execution_width: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setObjectThreadgroupSizeIsMultipleOfThreadExecutionWidth:
+                    object_threadgroup_size_is_multiple_of_thread_execution_width
+            ]
+        }
+    }
+
+    pub fn payload_memory_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, payloadMemoryLength] }
+    }
+
+    pub fn set_payload_memory_length(&self, payload_memory_length: NSUInteger) {
+        unsafe { msg_send![self, setPayloadMemoryLength: payload_memory_length] }
+    }
+
+    pub fn raster_sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, rasterSampleCount] }
+    }
+
+    pub fn set_raster_sample_count(&self, raster_sample_count: NSUInteger) {
+        unsafe { msg_send![self, setRasterSampleCount: raster_sample_count] }
+    }
+
+    pub fn stencil_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, stencilAttachmentPixelFormat] }
+    }
+
+    pub fn set_stencil_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setStencilAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinedescriptor>
+pub enum MTLRenderPipelineDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineDescriptor;
+    pub struct RenderPipelineDescriptor;
+}
+
+impl RenderPipelineDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLRenderPipelineDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl RenderPipelineDescriptorRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn vertex_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, vertexFunction] }
+    }
+
+    pub fn set_vertex_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setVertexFunction: function] }
+    }
+
+    pub fn fragment_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, fragmentFunction] }
+    }
+
+    pub fn set_fragment_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setFragmentFunction: function] }
+    }
+
+    pub fn vertex_descriptor(&self) -> Option<&VertexDescriptorRef> {
+        unsafe { msg_send![self, vertexDescriptor] }
+    }
+
+    pub fn set_vertex_descriptor(&self, descriptor: Option<&VertexDescriptorRef>) {
+        unsafe { msg_send![self, setVertexDescriptor: descriptor] }
+    }
+
+    /// DEPRECATED - aliases rasterSampleCount property
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    /// DEPRECATED - aliases rasterSampleCount property
+    pub fn set_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setSampleCount: count] }
+    }
+
+    pub fn raster_sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, rasterSampleCount] }
+    }
+
+    pub fn set_raster_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setRasterSampleCount: count] }
+    }
+
+    pub fn max_vertex_amplification_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxVertexAmplificationCount] }
+    }
+
+    pub fn set_max_vertex_amplification_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxVertexAmplificationCount: count] }
+    }
+
+    pub fn is_alpha_to_coverage_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isAlphaToCoverageEnabled] }
+    }
+
+    pub fn set_alpha_to_coverage_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToCoverageEnabled: enabled] }
+    }
+
+    pub fn is_alpha_to_one_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isAlphaToOneEnabled] }
+    }
+
+    pub fn set_alpha_to_one_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToOneEnabled: enabled] }
+    }
+
+    pub fn is_rasterization_enabled(&self) -> bool {
+        unsafe { msg_send_bool![self, isRasterizationEnabled] }
+    }
+
+    pub fn set_rasterization_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setRasterizationEnabled: enabled] }
+    }
+
+    pub fn color_attachments(&self) -> &RenderPipelineColorAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, colorAttachments] }
+    }
+
+    pub fn depth_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, depthAttachmentPixelFormat] }
+    }
+
+    pub fn set_depth_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setDepthAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn stencil_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, stencilAttachmentPixelFormat] }
+    }
+
+    pub fn set_stencil_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setStencilAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn input_primitive_topology(&self) -> MTLPrimitiveTopologyClass {
+        unsafe { msg_send![self, inputPrimitiveTopology] }
+    }
+
+    pub fn set_input_primitive_topology(&self, topology: MTLPrimitiveTopologyClass) {
+        unsafe { msg_send![self, setInputPrimitiveTopology: topology] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_vertex_data(&self) -> *mut std::ffi::c_void {
+        use std::ptr;
+        let flags = 0;
+        let err: *mut Object = ptr::null_mut();
+        msg_send![self, newSerializedVertexDataWithFlags:flags
+                                                    error:err]
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_fragment_data(&self) -> *mut std::ffi::c_void {
+        msg_send![self, serializeFragmentData]
+    }
+
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe { msg_send_bool![self, supportIndirectCommandBuffers] }
+    }
+
+    pub fn set_support_indirect_command_buffers(&self, support: bool) {
+        unsafe { msg_send![self, setSupportIndirectCommandBuffers: support] }
+    }
+
+    pub fn vertex_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, vertexBuffers] }
+    }
+
+    pub fn fragment_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, fragmentBuffers] }
+    }
+
+    // TODO: tesselation stuff
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn binary_archives(&self) -> Vec<BinaryArchive> {
+        unsafe {
+            let archives: *mut Object = msg_send![self, binaryArchives];
+            let count: NSUInteger = msg_send![archives, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let a = msg_send![archives, objectAtIndex: i];
+                    BinaryArchive::from_ptr(a)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal from Rust slice
+    pub fn set_binary_archives(&self, archives: &[&BinaryArchiveRef]) {
+        let ns_array = Array::<BinaryArchive>::from_slice(archives);
+        unsafe { msg_send![self, setBinaryArchives: ns_array] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn fragment_linked_functions(&self) -> &LinkedFunctionsRef {
+        unsafe { msg_send![self, fragmentLinkedFunctions] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_fragment_linked_functions(&self, functions: &LinkedFunctionsRef) {
+        unsafe { msg_send![self, setFragmentLinkedFunctions: functions] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinestate>
+pub enum MTLRenderPipelineState {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineState;
+    pub struct RenderPipelineState;
+}
+
+impl RenderPipelineStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_intersection_function_table_with_descriptor(
+        &self,
+        descriptor: &IntersectionFunctionTableDescriptorRef,
+        stage: MTLRenderStages,
+    ) -> IntersectionFunctionTable {
+        unsafe {
+            msg_send![self, newIntersectionFunctionTableWithDescriptor: descriptor
+                                                                            stage:stage]
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn function_handle_with_function(
+        &self,
+        function: &FunctionRef,
+        stage: MTLRenderStages,
+    ) -> Option<&FunctionHandleRef> {
+        unsafe {
+            msg_send![self, functionHandleWithFunction: function
+                                                            stage:stage]
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_visible_function_table_with_descriptor(
+        &self,
+        descriptor: &VisibleFunctionTableDescriptorRef,
+        stage: MTLRenderStages,
+    ) -> VisibleFunctionTable {
+        unsafe { msg_send![self, newVisibleFunctionTableWithDescriptor: descriptor stage:stage] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinecolorattachmentdescriptorarray>
+pub enum MTLRenderPipelineColorAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineColorAttachmentDescriptorArray;
+    pub struct RenderPipelineColorAttachmentDescriptorArray;
+}
+
+impl RenderPipelineColorAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&RenderPipelineColorAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&RenderPipelineColorAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                   atIndexedSubscript:index]
+        }
+    }
+}

vendor/metal/src/renderpass.rs

@@ -0,0 +1,443 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+/// See <https://developer.apple.com/documentation/metal/mtlloadaction>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug)]
+pub enum MTLLoadAction {
+    DontCare = 0,
+    Load = 1,
+    Clear = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstoreaction>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug)]
+pub enum MTLStoreAction {
+    DontCare = 0,
+    Store = 1,
+    MultisampleResolve = 2,
+    StoreAndMultisampleResolve = 3,
+    Unknown = 4,
+    CustomSampleDepthStore = 5,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlclearcolor>
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLClearColor {
+    pub red: f64,
+    pub green: f64,
+    pub blue: f64,
+    pub alpha: f64,
+}
+
+impl MTLClearColor {
+    #[inline]
+    pub fn new(red: f64, green: f64, blue: f64, alpha: f64) -> Self {
+        Self {
+            red,
+            green,
+            blue,
+            alpha,
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlmultisamplestencilresolvefilter>
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+pub enum MTLMultisampleStencilResolveFilter {
+    Sample0 = 0,
+    DepthResolvedSample = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpassattachmentdescriptor>
+pub enum MTLRenderPassAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassAttachmentDescriptor;
+    pub struct RenderPassAttachmentDescriptor;
+}
+
+impl RenderPassAttachmentDescriptorRef {
+    pub fn texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, texture] }
+    }
+
+    pub fn set_texture(&self, texture: Option<&TextureRef>) {
+        unsafe { msg_send![self, setTexture: texture] }
+    }
+
+    pub fn level(&self) -> NSUInteger {
+        unsafe { msg_send![self, level] }
+    }
+
+    pub fn set_level(&self, level: NSUInteger) {
+        unsafe { msg_send![self, setLevel: level] }
+    }
+
+    pub fn slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, slice] }
+    }
+
+    pub fn set_slice(&self, slice: NSUInteger) {
+        unsafe { msg_send![self, setSlice: slice] }
+    }
+
+    pub fn depth_plane(&self) -> NSUInteger {
+        unsafe { msg_send![self, depthPlane] }
+    }
+
+    pub fn set_depth_plane(&self, depth_plane: NSUInteger) {
+        unsafe { msg_send![self, setDepthPlane: depth_plane] }
+    }
+
+    pub fn resolve_texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, resolveTexture] }
+    }
+
+    pub fn set_resolve_texture(&self, resolve_texture: Option<&TextureRef>) {
+        unsafe { msg_send![self, setResolveTexture: resolve_texture] }
+    }
+
+    pub fn resolve_level(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveLevel] }
+    }
+
+    pub fn set_resolve_level(&self, resolve_level: NSUInteger) {
+        unsafe { msg_send![self, setResolveLevel: resolve_level] }
+    }
+
+    pub fn resolve_slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveSlice] }
+    }
+
+    pub fn set_resolve_slice(&self, resolve_slice: NSUInteger) {
+        unsafe { msg_send![self, setResolveSlice: resolve_slice] }
+    }
+
+    pub fn resolve_depth_plane(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveDepthPlane] }
+    }
+
+    pub fn set_resolve_depth_plane(&self, resolve_depth_plane: NSUInteger) {
+        unsafe { msg_send![self, setResolveDepthPlane: resolve_depth_plane] }
+    }
+
+    pub fn load_action(&self) -> MTLLoadAction {
+        unsafe { msg_send![self, loadAction] }
+    }
+
+    pub fn set_load_action(&self, load_action: MTLLoadAction) {
+        unsafe { msg_send![self, setLoadAction: load_action] }
+    }
+
+    pub fn store_action(&self) -> MTLStoreAction {
+        unsafe { msg_send![self, storeAction] }
+    }
+
+    pub fn set_store_action(&self, store_action: MTLStoreAction) {
+        unsafe { msg_send![self, setStoreAction: store_action] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpasscolorattachmentdescriptor>
+pub enum MTLRenderPassColorAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassColorAttachmentDescriptor;
+    pub struct RenderPassColorAttachmentDescriptor;
+    type ParentType = RenderPassAttachmentDescriptor;
+}
+
+impl RenderPassColorAttachmentDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLRenderPassColorAttachmentDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl RenderPassColorAttachmentDescriptorRef {
+    pub fn clear_color(&self) -> MTLClearColor {
+        unsafe { msg_send![self, clearColor] }
+    }
+
+    pub fn set_clear_color(&self, clear_color: MTLClearColor) {
+        unsafe { msg_send![self, setClearColor: clear_color] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpassdepthattachmentdescriptor>
+pub enum MTLRenderPassDepthAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassDepthAttachmentDescriptor;
+    pub struct RenderPassDepthAttachmentDescriptor;
+    type ParentType = RenderPassAttachmentDescriptor;
+}
+
+impl RenderPassDepthAttachmentDescriptorRef {
+    pub fn clear_depth(&self) -> f64 {
+        unsafe { msg_send![self, clearDepth] }
+    }
+
+    pub fn set_clear_depth(&self, clear_depth: f64) {
+        unsafe { msg_send![self, setClearDepth: clear_depth] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpassstencilattachmentdescriptor>
+pub enum MTLRenderPassStencilAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassStencilAttachmentDescriptor;
+    pub struct RenderPassStencilAttachmentDescriptor;
+    type ParentType = RenderPassAttachmentDescriptor;
+}
+
+impl RenderPassStencilAttachmentDescriptorRef {
+    pub fn clear_stencil(&self) -> u32 {
+        unsafe { msg_send![self, clearStencil] }
+    }
+
+    pub fn set_clear_stencil(&self, clear_stencil: u32) {
+        unsafe { msg_send![self, setClearStencil: clear_stencil] }
+    }
+
+    pub fn stencil_resolve_filter(&self) -> MTLMultisampleStencilResolveFilter {
+        unsafe { msg_send![self, stencilResolveFilter] }
+    }
+
+    pub fn set_stencil_resolve_filter(
+        &self,
+        stencil_resolve_filter: MTLMultisampleStencilResolveFilter,
+    ) {
+        unsafe { msg_send![self, setStencilResolveFilter: stencil_resolve_filter] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpasscolorattachmentdescriptorarray>
+pub enum MTLRenderPassColorAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassColorAttachmentDescriptorArray;
+    pub struct RenderPassColorAttachmentDescriptorArray;
+}
+
+impl RenderPassColorAttachmentDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&RenderPassColorAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&RenderPassColorAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpasssamplebufferattachmentdescriptor>
+pub enum MTLRenderPassSampleBufferAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassSampleBufferAttachmentDescriptor;
+    pub struct RenderPassSampleBufferAttachmentDescriptor;
+}
+
+impl RenderPassSampleBufferAttachmentDescriptor {
+    pub fn new() -> Self {
+        let class = class!(MTLRenderPassSampleBufferAttachmentDescriptor);
+        unsafe { msg_send![class, new] }
+    }
+}
+
+impl RenderPassSampleBufferAttachmentDescriptorRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
+        unsafe { msg_send![self, sampleBuffer] }
+    }
+
+    pub fn set_sample_buffer(&self, sample_buffer: &CounterSampleBufferRef) {
+        unsafe { msg_send![self, setSampleBuffer: sample_buffer] }
+    }
+
+    pub fn start_of_vertex_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, startOfVertexSampleIndex] }
+    }
+
+    pub fn set_start_of_vertex_sample_index(&self, start_of_vertex_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setStartOfVertexSampleIndex: start_of_vertex_sample_index
+            ]
+        }
+    }
+
+    pub fn end_of_vertex_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, endOfVertexSampleIndex] }
+    }
+
+    pub fn set_end_of_vertex_sample_index(&self, end_of_vertex_sample_index: NSUInteger) {
+        unsafe { msg_send![self, setEndOfVertexSampleIndex: end_of_vertex_sample_index] }
+    }
+
+    pub fn start_of_fragment_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, startOfFragmentSampleIndex] }
+    }
+
+    pub fn set_start_of_fragment_sample_index(&self, start_of_fragment_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setStartOfFragmentSampleIndex: start_of_fragment_sample_index
+            ]
+        }
+    }
+
+    pub fn end_of_fragment_sample_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, endOfFragmentSampleIndex] }
+    }
+
+    pub fn set_end_of_fragment_sample_index(&self, end_of_fragment_sample_index: NSUInteger) {
+        unsafe {
+            msg_send![
+                self,
+                setEndOfFragmentSampleIndex: end_of_fragment_sample_index
+            ]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpasssamplebufferattachmentdescriptorarray>
+pub enum MTLRenderPassSampleBufferAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassSampleBufferAttachmentDescriptorArray;
+    pub struct RenderPassSampleBufferAttachmentDescriptorArray;
+}
+
+impl RenderPassSampleBufferAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&RenderPassSampleBufferAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&RenderPassSampleBufferAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+/// ## Important!
+/// When configuring a [`MTLTextureDescriptor`] object for use with an attachment, set its usage
+/// value to renderTarget if you already know that you intend to use the resulting MTLTexture object in
+/// an attachment. This may significantly improve your app’s performance with certain hardware.
+///
+/// See <https://developer.apple.com/documentation/metal/mtlrenderpassdescriptor>
+pub enum MTLRenderPassDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassDescriptor;
+    pub struct RenderPassDescriptor;
+}
+
+impl RenderPassDescriptor {
+    /// Creates a default render pass descriptor with no attachments.
+    pub fn new<'a>() -> &'a RenderPassDescriptorRef {
+        unsafe { msg_send![class!(MTLRenderPassDescriptor), renderPassDescriptor] }
+    }
+}
+
+impl RenderPassDescriptorRef {
+    pub fn color_attachments(&self) -> &RenderPassColorAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, colorAttachments] }
+    }
+
+    pub fn depth_attachment(&self) -> Option<&RenderPassDepthAttachmentDescriptorRef> {
+        unsafe { msg_send![self, depthAttachment] }
+    }
+
+    pub fn set_depth_attachment(
+        &self,
+        depth_attachment: Option<&RenderPassDepthAttachmentDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setDepthAttachment: depth_attachment] }
+    }
+
+    pub fn stencil_attachment(&self) -> Option<&RenderPassStencilAttachmentDescriptorRef> {
+        unsafe { msg_send![self, stencilAttachment] }
+    }
+
+    pub fn set_stencil_attachment(
+        &self,
+        stencil_attachment: Option<&RenderPassStencilAttachmentDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setStencilAttachment: stencil_attachment] }
+    }
+
+    pub fn visibility_result_buffer(&self) -> Option<&BufferRef> {
+        unsafe { msg_send![self, visibilityResultBuffer] }
+    }
+
+    pub fn set_visibility_result_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setVisibilityResultBuffer: buffer] }
+    }
+
+    pub fn render_target_array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetArrayLength] }
+    }
+
+    pub fn set_render_target_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetArrayLength: length] }
+    }
+
+    pub fn render_target_width(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetWidth] }
+    }
+
+    pub fn set_render_target_width(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetWidth: size] }
+    }
+
+    pub fn render_target_height(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetHeight] }
+    }
+
+    pub fn set_render_target_height(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetHeight: size] }
+    }
+
+    pub fn default_raster_sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, defaultRasterSampleCount] }
+    }
+
+    pub fn set_default_raster_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setDefaultRasterSampleCount: count] }
+    }
+
+    pub fn sample_buffer_attachments(&self) -> &RenderPassSampleBufferAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, sampleBufferAttachments] }
+    }
+}

vendor/metal/src/resource.rs

@@ -0,0 +1,182 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtlpurgeablestate>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPurgeableState {
+    KeepCurrent = 1,
+    NonVolatile = 2,
+    Volatile = 3,
+    Empty = 4,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlcpucachemode>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLCPUCacheMode {
+    DefaultCache = 0,
+    WriteCombined = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlstoragemode>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLStorageMode {
+    Shared = 0,
+    Managed = 1,
+    Private = 2,
+    /// Only available on macos(11.0), macCatalyst(14.0), ios(10.0)
+    Memoryless = 3,
+}
+
+/// Only available on macos(10.15), ios(13.0)
+///
+/// See <https://developer.apple.com/documentation/metal/mtlhazardtrackingmode>
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLHazardTrackingMode {
+    Default = 0,
+    Untracked = 1,
+    Tracked = 2,
+}
+
+pub const MTLResourceCPUCacheModeShift: NSUInteger = 0;
+pub const MTLResourceCPUCacheModeMask: NSUInteger = 0xf << MTLResourceCPUCacheModeShift;
+pub const MTLResourceStorageModeShift: NSUInteger = 4;
+pub const MTLResourceStorageModeMask: NSUInteger = 0xf << MTLResourceStorageModeShift;
+pub const MTLResourceHazardTrackingModeShift: NSUInteger = 8;
+pub const MTLResourceHazardTrackingModeMask: NSUInteger = 0x3 << MTLResourceHazardTrackingModeShift;
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metal/mtlresourceoptions>
+    #[allow(non_upper_case_globals)]
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLResourceOptions: NSUInteger {
+        const CPUCacheModeDefaultCache  = (MTLCPUCacheMode::DefaultCache as NSUInteger) << MTLResourceCPUCacheModeShift;
+        const CPUCacheModeWriteCombined = (MTLCPUCacheMode::WriteCombined as NSUInteger) << MTLResourceCPUCacheModeShift;
+
+        const StorageModeShared  = (MTLStorageMode::Shared as NSUInteger)  << MTLResourceStorageModeShift;
+        const StorageModeManaged = (MTLStorageMode::Managed as NSUInteger) << MTLResourceStorageModeShift;
+        const StorageModePrivate = (MTLStorageMode::Private as NSUInteger) << MTLResourceStorageModeShift;
+        const StorageModeMemoryless = (MTLStorageMode::Memoryless as NSUInteger) << MTLResourceStorageModeShift;
+
+        /// Only available on macos(10.13), ios(10.0)
+        const HazardTrackingModeDefault = (MTLHazardTrackingMode::Default as NSUInteger) << MTLResourceHazardTrackingModeShift;
+        /// Only available on macos(10.13), ios(10.0)
+        const HazardTrackingModeUntracked = (MTLHazardTrackingMode::Untracked as NSUInteger) << MTLResourceHazardTrackingModeShift;
+        /// Only available on macos(10.15), ios(13.0)
+        const HazardTrackingModeTracked = (MTLHazardTrackingMode::Tracked as NSUInteger) << MTLResourceHazardTrackingModeShift;
+    }
+}
+
+bitflags::bitflags! {
+    /// Options that describe how a graphics or compute function uses an argument buffer’s resource.
+    ///
+    /// Enabling certain options for certain resources determines whether the Metal driver should
+    /// convert the resource to another format (for example, whether to decompress a color render target).
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlresourceusage>
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLResourceUsage: NSUInteger {
+        /// An option that enables reading from the resource.
+        const Read   = 1 << 0;
+        /// An option that enables writing to the resource.
+        const Write  = 1 << 1;
+        /// An option that enables sampling from the resource.
+        ///
+        /// Specify this option only if the resource is a texture.
+        const Sample = 1 << 2;
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsizeandalign>
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+#[repr(C)]
+pub struct MTLSizeAndAlign {
+    pub size: NSUInteger,
+    pub align: NSUInteger,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlresource>
+pub enum MTLResource {}
+
+foreign_obj_type! {
+    type CType = MTLResource;
+    pub struct Resource;
+    type ParentType = NsObject;
+}
+
+impl ResourceRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_purgeable_state(&self, state: MTLPurgeableState) -> MTLPurgeableState {
+        unsafe { msg_send![self, setPurgeableState: state] }
+    }
+
+    /// Only available on macOS 10.13+ & iOS 10.11+
+    pub fn allocated_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, allocatedSize] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn heap(&self) -> &HeapRef {
+        unsafe { msg_send![self, heap] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, heapOffset] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn make_aliasable(&self) {
+        unsafe { msg_send![self, makeAliasable] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn is_aliasable(&self) -> bool {
+        unsafe { msg_send_bool![self, isAliasable] }
+    }
+}

vendor/metal/src/sampler.rs

@@ -0,0 +1,165 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::{depthstencil::MTLCompareFunction, DeviceRef, MTLResourceID, NSUInteger};
+
+/// See <https://developer.apple.com/documentation/metal/mtlsamplerminmagfilter>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerMinMagFilter {
+    Nearest = 0,
+    Linear = 1,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsamplermipfilter>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerMipFilter {
+    NotMipmapped = 0,
+    Nearest = 1,
+    Linear = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsampleraddressmode>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerAddressMode {
+    ClampToEdge = 0,
+    MirrorClampToEdge = 1,
+    Repeat = 2,
+    MirrorRepeat = 3,
+    ClampToZero = 4,
+    ClampToBorderColor = 5,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsamplerbordercolor>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerBorderColor {
+    TransparentBlack = 0,
+    OpaqueBlack = 1,
+    OpaqueWhite = 2,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsamplerdescriptor>
+pub enum MTLSamplerDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLSamplerDescriptor;
+    pub struct SamplerDescriptor;
+}
+
+impl SamplerDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLSamplerDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl SamplerDescriptorRef {
+    pub fn set_min_filter(&self, filter: MTLSamplerMinMagFilter) {
+        unsafe { msg_send![self, setMinFilter: filter] }
+    }
+
+    pub fn set_mag_filter(&self, filter: MTLSamplerMinMagFilter) {
+        unsafe { msg_send![self, setMagFilter: filter] }
+    }
+
+    pub fn set_mip_filter(&self, filter: MTLSamplerMipFilter) {
+        unsafe { msg_send![self, setMipFilter: filter] }
+    }
+
+    pub fn set_address_mode_s(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setSAddressMode: mode] }
+    }
+
+    pub fn set_address_mode_t(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setTAddressMode: mode] }
+    }
+
+    pub fn set_address_mode_r(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setRAddressMode: mode] }
+    }
+
+    pub fn set_max_anisotropy(&self, anisotropy: NSUInteger) {
+        unsafe { msg_send![self, setMaxAnisotropy: anisotropy] }
+    }
+
+    pub fn set_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setCompareFunction: func] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn set_lod_bias(&self, bias: f32) {
+        msg_send![self, setLodBias: bias]
+    }
+
+    pub fn set_lod_min_clamp(&self, clamp: f32) {
+        unsafe { msg_send![self, setLodMinClamp: clamp] }
+    }
+
+    pub fn set_lod_max_clamp(&self, clamp: f32) {
+        unsafe { msg_send![self, setLodMaxClamp: clamp] }
+    }
+
+    pub fn set_lod_average(&self, enable: bool) {
+        unsafe { msg_send![self, setLodAverage: enable] }
+    }
+
+    pub fn set_normalized_coordinates(&self, enable: bool) {
+        unsafe { msg_send![self, setNormalizedCoordinates: enable] }
+    }
+
+    pub fn set_support_argument_buffers(&self, enable: bool) {
+        unsafe { msg_send![self, setSupportArgumentBuffers: enable] }
+    }
+
+    pub fn set_border_color(&self, color: MTLSamplerBorderColor) {
+        unsafe { msg_send![self, setBorderColor: color] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsamplerstate>
+pub enum MTLSamplerState {}
+
+foreign_obj_type! {
+    type CType = MTLSamplerState;
+    pub struct SamplerState;
+}
+
+impl SamplerStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
+}

vendor/metal/src/sync.rs

@@ -0,0 +1,178 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+use block::{Block, RcBlock};
+use std::ptr;
+
+#[cfg(feature = "dispatch")]
+use dispatch;
+
+/// See <https://developer.apple.com/documentation/metal/mtlsharedeventnotificationblock>
+type MTLSharedEventNotificationBlock<'a> = RcBlock<(&'a SharedEventRef, u64), ()>;
+
+/// See <https://developer.apple.com/documentation/metal/mtlevent>
+pub enum MTLEvent {}
+
+foreign_obj_type! {
+    type CType = MTLEvent;
+    pub struct Event;
+}
+
+impl EventRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsharedevent>
+pub enum MTLSharedEvent {}
+
+foreign_obj_type! {
+    type CType = MTLSharedEvent;
+    pub struct SharedEvent;
+    type ParentType = Event;
+}
+
+impl SharedEventRef {
+    pub fn signaled_value(&self) -> u64 {
+        unsafe { msg_send![self, signaledValue] }
+    }
+
+    pub fn set_signaled_value(&self, new_value: u64) {
+        unsafe { msg_send![self, setSignaledValue: new_value] }
+    }
+
+    /// Schedules a notification handler to be called after the shareable event’s signal value
+    /// equals or exceeds a given value.
+    pub fn notify(
+        &self,
+        listener: &SharedEventListenerRef,
+        value: u64,
+        block: MTLSharedEventNotificationBlock,
+    ) {
+        unsafe {
+            // If the block doesn't have a signature, this segfaults.
+            // Taken from https://github.com/servo/pathfinder/blob/e858c8dc1d8ff02a5b603e21e09a64d6b3e11327/metal/src/lib.rs#L2327
+            let block = mem::transmute::<
+                MTLSharedEventNotificationBlock,
+                *mut BlockBase<(&SharedEventRef, u64), ()>,
+            >(block);
+            (*block).flags |= BLOCK_HAS_SIGNATURE | BLOCK_HAS_COPY_DISPOSE;
+            (*block).extra = ptr::addr_of!(BLOCK_EXTRA);
+            let () = msg_send![self, notifyListener:listener atValue:value block:block];
+        }
+
+        extern "C" fn dtor(_: *mut BlockBase<(&SharedEventRef, u64), ()>) {}
+
+        const SIGNATURE: &[u8] = b"v16@?0Q8\0";
+        const SIGNATURE_PTR: *const i8 = &SIGNATURE[0] as *const u8 as *const i8;
+        static mut BLOCK_EXTRA: BlockExtra<(&SharedEventRef, u64), ()> = BlockExtra {
+            unknown0: 0 as *mut i32,
+            unknown1: 0 as *mut i32,
+            unknown2: 0 as *mut i32,
+            dtor,
+            signature: &SIGNATURE_PTR,
+        };
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsharedeventlistener>
+pub enum MTLSharedEventListener {}
+
+foreign_obj_type! {
+    type CType = MTLSharedEventListener;
+    pub struct SharedEventListener;
+}
+
+impl SharedEventListener {
+    pub unsafe fn from_queue_handle(queue: dispatch_queue_t) -> Self {
+        let listener: SharedEventListener = msg_send![class!(MTLSharedEventListener), alloc];
+        let ptr: *mut Object = msg_send![listener.as_ref(), initWithDispatchQueue: queue];
+        if ptr.is_null() {
+            panic!("[MTLSharedEventListener alloc] initWithDispatchQueue failed");
+        }
+        listener
+    }
+
+    #[cfg(feature = "dispatch")]
+    pub fn from_queue(queue: &dispatch::Queue) -> Self {
+        unsafe {
+            let raw_queue = std::mem::transmute::<&dispatch::Queue, *const dispatch_queue_t>(queue);
+            Self::from_queue_handle(*raw_queue)
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlfence>
+pub enum MTLFence {}
+
+foreign_obj_type! {
+    type CType = MTLFence;
+    pub struct Fence;
+}
+
+impl FenceRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+bitflags::bitflags! {
+    /// The render stages at which a synchronization command is triggered.
+    ///
+    /// Render stages provide finer control for specifying when synchronization must occur,
+    /// allowing for vertex and fragment processing to overlap in execution.
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlrenderstages>
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLRenderStages: NSUInteger {
+        /// The vertex rendering stage.
+        const Vertex = 1 << 0;
+        /// The fragment rendering stage.
+        const Fragment = 1 << 1;
+        /// The tile rendering stage.
+        const Tile = 1 << 2;
+    }
+}
+
+const BLOCK_HAS_COPY_DISPOSE: i32 = 0x02000000;
+const BLOCK_HAS_SIGNATURE: i32 = 0x40000000;
+
+#[repr(C)]
+struct BlockBase<A, R> {
+    isa: *const std::ffi::c_void,                             // 0x00
+    flags: i32,                                               // 0x08
+    _reserved: i32,                                           // 0x0c
+    invoke: unsafe extern "C" fn(*mut Block<A, R>, ...) -> R, // 0x10
+    extra: *const BlockExtra<A, R>,                           // 0x18
+}
+
+type BlockExtraDtor<A, R> = extern "C" fn(*mut BlockBase<A, R>);
+
+#[repr(C)]
+struct BlockExtra<A, R> {
+    unknown0: *mut i32,          // 0x00
+    unknown1: *mut i32,          // 0x08
+    unknown2: *mut i32,          // 0x10
+    dtor: BlockExtraDtor<A, R>,  // 0x18
+    signature: *const *const i8, // 0x20
+}

vendor/metal/src/texture.rs

@@ -0,0 +1,352 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+/// See <https://developer.apple.com/documentation/metal/mtltexturetype>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum MTLTextureType {
+    D1 = 0,
+    D1Array = 1,
+    D2 = 2,
+    D2Array = 3,
+    D2Multisample = 4,
+    Cube = 5,
+    CubeArray = 6,
+    D3 = 7,
+    D2MultisampleArray = 8,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtltexturecompressiontype>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum MTLTextureCompressionType {
+    Lossless = 0,
+    Lossy = 1,
+}
+
+bitflags::bitflags! {
+    /// See <https://developer.apple.com/documentation/metal/mtltextureusage>
+    #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct MTLTextureUsage: NSUInteger {
+        const Unknown         = 0x0000;
+        const ShaderRead      = 0x0001;
+        const ShaderWrite     = 0x0002;
+        const RenderTarget    = 0x0004;
+        const PixelFormatView = 0x0010;
+        const ShaderAtomic    = 0x0020;
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtltexturedescriptor>
+pub enum MTLTextureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLTextureDescriptor;
+    pub struct TextureDescriptor;
+}
+
+impl TextureDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLTextureDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl TextureDescriptorRef {
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn set_texture_type(&self, texture_type: MTLTextureType) {
+        unsafe { msg_send![self, setTextureType: texture_type] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn width(&self) -> NSUInteger {
+        unsafe { msg_send![self, width] }
+    }
+
+    pub fn set_width(&self, width: NSUInteger) {
+        unsafe { msg_send![self, setWidth: width] }
+    }
+
+    pub fn height(&self) -> NSUInteger {
+        unsafe { msg_send![self, height] }
+    }
+
+    pub fn set_height(&self, height: NSUInteger) {
+        unsafe { msg_send![self, setHeight: height] }
+    }
+
+    pub fn depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, depth] }
+    }
+
+    pub fn set_depth(&self, depth: NSUInteger) {
+        unsafe { msg_send![self, setDepth: depth] }
+    }
+
+    pub fn mipmap_level_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, mipmapLevelCount] }
+    }
+
+    pub fn set_mipmap_level_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMipmapLevelCount: count] }
+    }
+
+    pub fn set_mipmap_level_count_for_size(&self, size: MTLSize) {
+        let MTLSize {
+            width,
+            height,
+            depth,
+        } = size;
+        let count = (width.max(height).max(depth) as f64).log2().ceil() as u64;
+        self.set_mipmap_level_count(count);
+    }
+
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn set_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setSampleCount: count] }
+    }
+
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn set_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setArrayLength: length] }
+    }
+
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    pub fn set_resource_options(&self, options: MTLResourceOptions) {
+        unsafe { msg_send![self, setResourceOptions: options] }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn set_cpu_cache_mode(&self, mode: MTLCPUCacheMode) {
+        unsafe { msg_send![self, setCpuCacheMode: mode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_storage_mode(&self, mode: MTLStorageMode) {
+        unsafe { msg_send![self, setStorageMode: mode] }
+    }
+
+    pub fn usage(&self) -> MTLTextureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    pub fn set_usage(&self, usage: MTLTextureUsage) {
+        unsafe { msg_send![self, setUsage: usage] }
+    }
+
+    pub fn compression_type(&self) -> MTLTextureCompressionType {
+        unsafe { msg_send![self, compressionType] }
+    }
+
+    pub fn set_compression_type(&self, compression_type: MTLTextureCompressionType) {
+        unsafe { msg_send![self, setCompressionType: compression_type] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtltexture>
+pub enum MTLTexture {}
+
+foreign_obj_type! {
+    type CType = MTLTexture;
+    pub struct Texture;
+    type ParentType = Resource;
+}
+
+impl TextureRef {
+    #[deprecated(since = "0.13.0")]
+    pub fn root_resource(&self) -> Option<&ResourceRef> {
+        unsafe { msg_send![self, rootResource] }
+    }
+
+    pub fn parent_texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, parentTexture] }
+    }
+
+    pub fn parent_relative_level(&self) -> NSUInteger {
+        unsafe { msg_send![self, parentRelativeLevel] }
+    }
+
+    pub fn parent_relative_slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, parentRelativeSlice] }
+    }
+
+    pub fn buffer(&self) -> Option<&BufferRef> {
+        unsafe { msg_send![self, buffer] }
+    }
+
+    pub fn buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferOffset] }
+    }
+
+    pub fn buffer_stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferBytesPerRow] }
+    }
+
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn width(&self) -> NSUInteger {
+        unsafe { msg_send![self, width] }
+    }
+
+    pub fn height(&self) -> NSUInteger {
+        unsafe { msg_send![self, height] }
+    }
+
+    pub fn depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, depth] }
+    }
+
+    pub fn mipmap_level_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, mipmapLevelCount] }
+    }
+
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn usage(&self) -> MTLTextureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    /// [framebufferOnly Apple Docs](https://developer.apple.com/documentation/metal/mtltexture/1515749-framebufferonly?language=objc)
+    pub fn framebuffer_only(&self) -> bool {
+        unsafe { msg_send_bool![self, isFramebufferOnly] }
+    }
+
+    pub fn get_bytes(
+        &self,
+        bytes: *mut std::ffi::c_void,
+        stride: NSUInteger,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, getBytes:bytes
+                         bytesPerRow:stride
+                          fromRegion:region
+                         mipmapLevel:mipmap_level]
+        }
+    }
+
+    pub fn get_bytes_in_slice(
+        &self,
+        bytes: *mut std::ffi::c_void,
+        stride: NSUInteger,
+        image_stride: NSUInteger,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        slice: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, getBytes:bytes
+                         bytesPerRow:stride
+                       bytesPerImage:image_stride
+                          fromRegion:region
+                         mipmapLevel:mipmap_level
+                               slice:slice]
+        }
+    }
+
+    pub fn replace_region(
+        &self,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        bytes: *const std::ffi::c_void,
+        stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, replaceRegion:region
+                              mipmapLevel:mipmap_level
+                                withBytes:bytes
+                              bytesPerRow:stride]
+        }
+    }
+
+    pub fn replace_region_in_slice(
+        &self,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        slice: NSUInteger,
+        bytes: *const std::ffi::c_void,
+        stride: NSUInteger,
+        image_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, replaceRegion:region
+                              mipmapLevel:mipmap_level
+                                    slice:slice
+                                withBytes:bytes
+                              bytesPerRow:stride
+                            bytesPerImage:image_stride]
+        }
+    }
+
+    pub fn new_texture_view(&self, pixel_format: MTLPixelFormat) -> Texture {
+        unsafe { msg_send![self, newTextureViewWithPixelFormat: pixel_format] }
+    }
+
+    pub fn new_texture_view_from_slice(
+        &self,
+        pixel_format: MTLPixelFormat,
+        texture_type: MTLTextureType,
+        mipmap_levels: crate::NSRange,
+        slices: crate::NSRange,
+    ) -> Texture {
+        unsafe {
+            msg_send![self, newTextureViewWithPixelFormat:pixel_format
+                                                textureType:texture_type
+                                                     levels:mipmap_levels
+                                                     slices:slices]
+        }
+    }
+
+    pub fn gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
+}

vendor/metal/src/types.rs

@@ -0,0 +1,90 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::NSUInteger;
+use std::default::Default;
+
+/// See <https://developer.apple.com/documentation/metal/mtlorigin>
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLOrigin {
+    pub x: NSUInteger,
+    pub y: NSUInteger,
+    pub z: NSUInteger,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsize>
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLSize {
+    pub width: NSUInteger,
+    pub height: NSUInteger,
+    pub depth: NSUInteger,
+}
+
+impl MTLSize {
+    pub fn new(width: NSUInteger, height: NSUInteger, depth: NSUInteger) -> Self {
+        Self {
+            width,
+            height,
+            depth,
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlregion>
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLRegion {
+    pub origin: MTLOrigin,
+    pub size: MTLSize,
+}
+
+impl MTLRegion {
+    #[inline]
+    pub fn new_1d(x: NSUInteger, width: NSUInteger) -> Self {
+        Self::new_2d(x, 0, width, 1)
+    }
+
+    #[inline]
+    pub fn new_2d(x: NSUInteger, y: NSUInteger, width: NSUInteger, height: NSUInteger) -> Self {
+        Self::new_3d(x, y, 0, width, height, 1)
+    }
+
+    #[inline]
+    pub fn new_3d(
+        x: NSUInteger,
+        y: NSUInteger,
+        z: NSUInteger,
+        width: NSUInteger,
+        height: NSUInteger,
+        depth: NSUInteger,
+    ) -> Self {
+        Self {
+            origin: MTLOrigin { x, y, z },
+            size: MTLSize {
+                width,
+                height,
+                depth,
+            },
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlsampleposition>
+#[repr(C)]
+#[derive(Copy, Clone, Debug, PartialEq, Default)]
+pub struct MTLSamplePosition {
+    pub x: f32,
+    pub y: f32,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLResourceID {
+    pub _impl: u64,
+}

vendor/metal/src/vertexdescriptor.rs

@@ -0,0 +1,250 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::NSUInteger;
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexformat>
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLVertexFormat {
+    Invalid = 0,
+    UChar2 = 1,
+    UChar3 = 2,
+    UChar4 = 3,
+    Char2 = 4,
+    Char3 = 5,
+    Char4 = 6,
+    UChar2Normalized = 7,
+    UChar3Normalized = 8,
+    UChar4Normalized = 9,
+    Char2Normalized = 10,
+    Char3Normalized = 11,
+    Char4Normalized = 12,
+    UShort2 = 13,
+    UShort3 = 14,
+    UShort4 = 15,
+    Short2 = 16,
+    Short3 = 17,
+    Short4 = 18,
+    UShort2Normalized = 19,
+    UShort3Normalized = 20,
+    UShort4Normalized = 21,
+    Short2Normalized = 22,
+    Short3Normalized = 23,
+    Short4Normalized = 24,
+    Half2 = 25,
+    Half3 = 26,
+    Half4 = 27,
+    Float = 28,
+    Float2 = 29,
+    Float3 = 30,
+    Float4 = 31,
+    Int = 32,
+    Int2 = 33,
+    Int3 = 34,
+    Int4 = 35,
+    UInt = 36,
+    UInt2 = 37,
+    UInt3 = 38,
+    UInt4 = 39,
+    Int1010102Normalized = 40,
+    UInt1010102Normalized = 41,
+    UChar4Normalized_BGRA = 42,
+    UChar = 45,
+    Char = 46,
+    UCharNormalized = 47,
+    CharNormalized = 48,
+    UShort = 49,
+    Short = 50,
+    UShortNormalized = 51,
+    ShortNormalized = 52,
+    Half = 53,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexstepfunction>
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLVertexStepFunction {
+    Constant = 0,
+    PerVertex = 1,
+    PerInstance = 2,
+    PerPatch = 3,
+    PerPatchControlPoint = 4,
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexbufferlayoutdescriptor>
+pub enum MTLVertexBufferLayoutDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexBufferLayoutDescriptor;
+    pub struct VertexBufferLayoutDescriptor;
+}
+
+impl VertexBufferLayoutDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLVertexBufferLayoutDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl VertexBufferLayoutDescriptorRef {
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn set_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setStride: stride] }
+    }
+
+    pub fn step_function(&self) -> MTLVertexStepFunction {
+        unsafe { msg_send![self, stepFunction] }
+    }
+
+    pub fn set_step_function(&self, func: MTLVertexStepFunction) {
+        unsafe { msg_send![self, setStepFunction: func] }
+    }
+
+    pub fn step_rate(&self) -> NSUInteger {
+        unsafe { msg_send![self, stepRate] }
+    }
+
+    pub fn set_step_rate(&self, step_rate: NSUInteger) {
+        unsafe { msg_send![self, setStepRate: step_rate] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexbufferlayoutdescriptorarray>
+pub enum MTLVertexBufferLayoutDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLVertexBufferLayoutDescriptorArray;
+    pub struct VertexBufferLayoutDescriptorArray;
+}
+
+impl VertexBufferLayoutDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&VertexBufferLayoutDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        layout: Option<&VertexBufferLayoutDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:layout
+                   atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexattributedescriptor>
+pub enum MTLVertexAttributeDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttributeDescriptor;
+    pub struct VertexAttributeDescriptor;
+}
+
+impl VertexAttributeDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLVertexAttributeDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl VertexAttributeDescriptorRef {
+    pub fn format(&self) -> MTLVertexFormat {
+        unsafe { msg_send![self, format] }
+    }
+
+    pub fn set_format(&self, format: MTLVertexFormat) {
+        unsafe { msg_send![self, setFormat: format] }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn set_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setOffset: offset] }
+    }
+
+    pub fn buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferIndex] }
+    }
+
+    pub fn set_buffer_index(&self, index: NSUInteger) {
+        unsafe { msg_send![self, setBufferIndex: index] }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexattributedescriptorarray>
+pub enum MTLVertexAttributeDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttributeDescriptorArray;
+    pub struct VertexAttributeDescriptorArray;
+}
+
+impl VertexAttributeDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&VertexAttributeDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attribute: Option<&VertexAttributeDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attribute
+                   atIndexedSubscript:index]
+        }
+    }
+}
+
+/// See <https://developer.apple.com/documentation/metal/mtlvertexdescriptor>
+pub enum MTLVertexDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexDescriptor;
+    pub struct VertexDescriptor;
+}
+
+impl VertexDescriptor {
+    pub fn new<'a>() -> &'a VertexDescriptorRef {
+        unsafe {
+            let class = class!(MTLVertexDescriptor);
+            msg_send![class, vertexDescriptor]
+        }
+    }
+}
+
+impl VertexDescriptorRef {
+    pub fn layouts(&self) -> &VertexBufferLayoutDescriptorArrayRef {
+        unsafe { msg_send![self, layouts] }
+    }
+
+    pub fn attributes(&self) -> &VertexAttributeDescriptorArrayRef {
+        unsafe { msg_send![self, attributes] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_descriptor(&self) -> *mut std::ffi::c_void {
+        msg_send![self, newSerializedDescriptor]
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}