Macro vulkayes_core::vertex_input_description

macro_rules! vertex_input_description {
    (
		$(
			$struct_type: ty $({@ $rate: expr })? {
				$(
					$(.$struct_field: ident)? => layout(location = $location: expr) in $shader_type: ident $($name: ident)?;
				)+
			}
		)*
	) => { ... };
}

Generates input binding descriptions and input attribute descriptions for pipeline shaders.

Usage:

vulkayes_core::offsetable_struct! {
	struct Vertex {
		position: [f32; 3],
		color: [f32; 3]
	} repr(C) as VertexOffsets
}
vulkayes_core::offsetable_struct! {
	struct Normal {
		Value: [f32; 3]
	} repr(C) as NormalOffsets
}
let (bindings, attributes) = vertex_input_description!(
	Vertex {@vk::VertexInputRate::VERTEX} {
		 => layout(location = 0) in vec3 position; // Leaving out the field name defaults the offset to 0
		.color => layout(location = 2) in vec3 color;
	}
	Normal {
		=> layout(location = 1) in vec3 normal;
	}
);

assert_eq!(bindings[0].binding, 0);
assert_eq!(bindings[0].stride, std::mem::size_of::<Vertex>() as u32);
assert_eq!(bindings[0].input_rate, vk::VertexInputRate::VERTEX);

assert_eq!(bindings[1].binding, 1);
assert_eq!(bindings[1].stride, std::mem::size_of::<Normal>() as u32);
assert_eq!(bindings[1].input_rate, vk::VertexInputRate::VERTEX);

assert_eq!(attributes[0].location, 0);
assert_eq!(attributes[0].binding, 0);
assert_eq!(attributes[0].format, vk::Format::R32G32B32_SFLOAT);
assert_eq!(attributes[0].offset, 0);

assert_eq!(attributes[1].location, 2);
assert_eq!(attributes[1].binding, 0);
assert_eq!(attributes[1].format, vk::Format::R32G32B32_SFLOAT);
assert_eq!(attributes[1].offset, 12);

assert_eq!(attributes[2].location, 1);
assert_eq!(attributes[2].binding, 1);
assert_eq!(attributes[2].format, vk::Format::R32G32B32_SFLOAT);
assert_eq!(attributes[2].offset, 0);