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use objc2::{
extern_class, extern_conformance, extern_methods,
rc::{Allocated, Retained},
};
use objc2_foundation::{CopyingHelper, NSCopying, NSObject, NSObjectProtocol};
use crate::*;
extern_class!(
/// Descriptor for an "indirect" instance acceleration structure that allows providing the instance count and
/// motion transform count indirectly, through buffer references.
///
/// An instance acceleration structure references other acceleration structures, and provides the ability to
/// "instantiate" them multiple times, each one with potentially a different transformation matrix.
///
/// You specify the properties of the instances in the acceleration structure this descriptor builds by providing a
/// buffer of `structs` via its ``instanceDescriptorBuffer`` property.
///
/// Compared to ``MTL4InstanceAccelerationStructureDescriptor``, this descriptor allows you to provide the number
/// of instances it references indirectly through a buffer reference, as well as the number of motion transforms.
///
/// This enables you to determine these counts indirectly in the GPU timeline via a compute pipeline.
/// Metal needs only to know the maximum possible number of instances and motion transforms to support,
/// which you specify via the ``maxInstanceCount`` and ``maxMotionTransformCount`` properties.
///
/// Use a ``MTLResidencySet`` to mark residency of all buffers and acceleration structures this descriptor references
/// when you build this acceleration structure.
///
/// See also [Apple's documentation](https://developer.apple.com/documentation/metal/mtl4indirectinstanceaccelerationstructuredescriptor?language=objc)
#[unsafe(super(MTL4AccelerationStructureDescriptor, MTLAccelerationStructureDescriptor, NSObject))]
#[derive(Debug, PartialEq, Eq, Hash)]
pub struct MTL4IndirectInstanceAccelerationStructureDescriptor;
);
extern_conformance!(
unsafe impl NSCopying for MTL4IndirectInstanceAccelerationStructureDescriptor {}
);
unsafe impl CopyingHelper for MTL4IndirectInstanceAccelerationStructureDescriptor {
type Result = Self;
}
extern_conformance!(
unsafe impl NSObjectProtocol for MTL4IndirectInstanceAccelerationStructureDescriptor {}
);
impl MTL4IndirectInstanceAccelerationStructureDescriptor {
extern_methods!(
/// Assigns a reference to a buffer containing instance descriptors for acceleration structures to reference.
///
/// This buffer conceptually represents an array of instance data. The specific format for the structs that comprise
/// each entry depends on the value of the ``instanceDescriptorType`` property.
///
/// You are responsible for ensuring the buffer address the range contains is not zero.
#[unsafe(method(instanceDescriptorBuffer))]
#[unsafe(method_family = none)]
pub fn instance_descriptor_buffer(&self) -> MTL4BufferRange;
/// Setter for [`instanceDescriptorBuffer`][Self::instanceDescriptorBuffer].
#[unsafe(method(setInstanceDescriptorBuffer:))]
#[unsafe(method_family = none)]
pub fn set_instance_descriptor_buffer(
&self,
instance_descriptor_buffer: MTL4BufferRange,
);
/// Sets the stride, in bytes, between instance descriptors in the instance descriptor buffer.
///
/// You are responsible for ensuring this stride is at least the size of the structure type corresponding to the instance
/// descriptor type and a multiple of 4 bytes.
///
/// Defaults to `0`, indicating the instance descriptors are tightly packed.
#[unsafe(method(instanceDescriptorStride))]
#[unsafe(method_family = none)]
pub fn instance_descriptor_stride(&self) -> usize;
/// Setter for [`instanceDescriptorStride`][Self::instanceDescriptorStride].
#[unsafe(method(setInstanceDescriptorStride:))]
#[unsafe(method_family = none)]
pub fn set_instance_descriptor_stride(
&self,
instance_descriptor_stride: usize,
);
/// Controls the maximum number of instance descriptors the instance descriptor buffer can reference.
///
/// You are responsible for ensuring that the final number of instances at build time, which you provide indirectly
/// via a buffer reference in ``instanceCountBuffer``, is less than or equal to this number.
#[unsafe(method(maxInstanceCount))]
#[unsafe(method_family = none)]
pub fn max_instance_count(&self) -> usize;
/// Setter for [`maxInstanceCount`][Self::maxInstanceCount].
#[unsafe(method(setMaxInstanceCount:))]
#[unsafe(method_family = none)]
pub fn set_max_instance_count(
&self,
max_instance_count: usize,
);
/// Provides a reference to a buffer containing the number of instances in the instance descriptor buffer, formatted as a
/// 32-bit unsigned integer.
///
/// You are responsible for ensuring that the final number of instances at build time, which you provide indirectly
/// via this buffer reference , is less than or equal to the value of property ``maxInstanceCount``.
#[unsafe(method(instanceCountBuffer))]
#[unsafe(method_family = none)]
pub fn instance_count_buffer(&self) -> MTL4BufferRange;
/// Setter for [`instanceCountBuffer`][Self::instanceCountBuffer].
#[unsafe(method(setInstanceCountBuffer:))]
#[unsafe(method_family = none)]
pub fn set_instance_count_buffer(
&self,
instance_count_buffer: MTL4BufferRange,
);
/// Controls the type of instance descriptor that the instance descriptor buffer references.
///
/// This value determines the layout Metal expects for the structs the instance descriptor buffer contains.
///
/// Defaults to `MTLAccelerationStructureInstanceDescriptorTypeIndirect`. Valid values for this property are
/// `MTLAccelerationStructureInstanceDescriptorTypeIndirect` or `MTLAccelerationStructureInstanceDescriptorTypeIndirectMotion`.
#[unsafe(method(instanceDescriptorType))]
#[unsafe(method_family = none)]
pub fn instance_descriptor_type(&self) -> MTLAccelerationStructureInstanceDescriptorType;
/// Setter for [`instanceDescriptorType`][Self::instanceDescriptorType].
#[unsafe(method(setInstanceDescriptorType:))]
#[unsafe(method_family = none)]
pub fn set_instance_descriptor_type(
&self,
instance_descriptor_type: MTLAccelerationStructureInstanceDescriptorType,
);
/// A buffer containing transformation information for instance motion keyframes, formatted according
/// to the motion transform type.
///
/// Each instance can have a different number of keyframes that you configure via individual instance
/// descriptors.
///
/// You are responsible for ensuring the buffer address the range references is not zero when using motion instance descriptors.
#[unsafe(method(motionTransformBuffer))]
#[unsafe(method_family = none)]
pub fn motion_transform_buffer(&self) -> MTL4BufferRange;
/// Setter for [`motionTransformBuffer`][Self::motionTransformBuffer].
#[unsafe(method(setMotionTransformBuffer:))]
#[unsafe(method_family = none)]
pub fn set_motion_transform_buffer(
&self,
motion_transform_buffer: MTL4BufferRange,
);
/// Controls the maximum number of motion transforms in the motion transform buffer.
///
/// You are responsible for ensuring that final number of motion transforms at build time that the buffer
/// ``motionTransformCountBuffer`` references is less than or equal to this number.
#[unsafe(method(maxMotionTransformCount))]
#[unsafe(method_family = none)]
pub fn max_motion_transform_count(&self) -> usize;
/// Setter for [`maxMotionTransformCount`][Self::maxMotionTransformCount].
#[unsafe(method(setMaxMotionTransformCount:))]
#[unsafe(method_family = none)]
pub fn set_max_motion_transform_count(
&self,
max_motion_transform_count: usize,
);
/// Associates a buffer reference containing the number of motion transforms in the motion transform buffer, formatted as a
/// 32-bit unsigned integer.
///
/// You are responsible for ensuring that the final number of motion transforms at build time in the buffer this property
/// references is less than or equal to the value of property ``maxMotionTransformCount``.
#[unsafe(method(motionTransformCountBuffer))]
#[unsafe(method_family = none)]
pub fn motion_transform_count_buffer(&self) -> MTL4BufferRange;
/// Setter for [`motionTransformCountBuffer`][Self::motionTransformCountBuffer].
#[unsafe(method(setMotionTransformCountBuffer:))]
#[unsafe(method_family = none)]
pub fn set_motion_transform_count_buffer(
&self,
motion_transform_count_buffer: MTL4BufferRange,
);
/// Specifies the layout for the transformation matrices in the instance descriptor buffer and the motion transformation matrix buffer.
///
/// Metal interprets the value of this property as the layout for the buffers that both ``instanceDescriptorBuffer`` and
/// ``motionTransformBuffer`` reference.
///
/// Defaults to `MTLMatrixLayoutColumnMajor`.
#[unsafe(method(instanceTransformationMatrixLayout))]
#[unsafe(method_family = none)]
pub fn instance_transformation_matrix_layout(&self) -> MTLMatrixLayout;
/// Setter for [`instanceTransformationMatrixLayout`][Self::instanceTransformationMatrixLayout].
#[unsafe(method(setInstanceTransformationMatrixLayout:))]
#[unsafe(method_family = none)]
pub fn set_instance_transformation_matrix_layout(
&self,
instance_transformation_matrix_layout: MTLMatrixLayout,
);
/// Sets the type of motion transforms, either as a matrix or individual components.
///
/// Defaults to `MTLTransformTypePackedFloat4x3`. Using a `MTLTransformTypeComponent` allows you to represent the
/// rotation by a quaternion (instead as of part of the matrix), allowing for correct motion interpolation.
#[unsafe(method(motionTransformType))]
#[unsafe(method_family = none)]
pub fn motion_transform_type(&self) -> MTLTransformType;
/// Setter for [`motionTransformType`][Self::motionTransformType].
#[unsafe(method(setMotionTransformType:))]
#[unsafe(method_family = none)]
pub fn set_motion_transform_type(
&self,
motion_transform_type: MTLTransformType,
);
/// Sets the stride for motion transform.
///
/// Defaults to `0`, indicating that transforms are tightly packed according to the motion transform type.
#[unsafe(method(motionTransformStride))]
#[unsafe(method_family = none)]
pub fn motion_transform_stride(&self) -> usize;
/// Setter for [`motionTransformStride`][Self::motionTransformStride].
#[unsafe(method(setMotionTransformStride:))]
#[unsafe(method_family = none)]
pub fn set_motion_transform_stride(
&self,
motion_transform_stride: usize,
);
);
}
/// Methods declared on superclass `NSObject`.
impl MTL4IndirectInstanceAccelerationStructureDescriptor {
extern_methods!(
#[unsafe(method(init))]
#[unsafe(method_family = init)]
pub fn init(this: Allocated<Self>) -> Retained<Self>;
#[unsafe(method(new))]
#[unsafe(method_family = new)]
pub fn new() -> Retained<Self>;
);
}