Implement missing features for Intersection Function Table

Author: FlannyH

src/accelerator_structure.rs

@@ -538,4 +538,37 @@ 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 gpu_resource_id(&self) -> MTLResourceID {
+        unsafe { msg_send![self, gpuResourceID] }
+    }
 }

src/pipeline/render.rs

@@ -664,6 +664,16 @@ impl RenderPipelineDescriptorRef {
         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] }
     }
@@ -688,6 +698,30 @@ impl RenderPipelineStateRef {
             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]
+        }
+    }
 }
 
 /// See <https://developer.apple.com/documentation/metal/mtlrenderpipelinecolorattachmentdescriptorarray>