rFactor2_vk_hud/src/enums.rs

#![allow(non_camel_case_types)]

use std::{mem, ptr};
use vulkan_rs::prelude::*;

use crate::*;

pub use VkLayerFunction::*;
pub use VkNegotiateLayerStructType::*;

#[derive(Clone)]
pub enum VkNegotiateLayerStructType {
    LAYER_NEGOTIATE_INTERFACE_STRUCT = 1,
}

#[derive(Clone, Copy, Eq, PartialEq)]
pub enum VkLayerFunction {
    VK_LAYER_LINK_INFO = 0,
    VK_LOADER_DATA_CALLBACK = 1,
    VK_LOADER_LAYER_CREATE_DEVICE_CALLBACK = 2,
    VK_LOADER_FEATURES = 3,
}

macro_rules! create_functions_enum {
    ($([$pfn:ident, $func:ident],)+) => {
        paste::paste! {
            pub enum Functions {
                Null,
                $(
                    $pfn ( [<PFN_vk $pfn>] ),
                )+
            }

            impl Functions {
                pub fn convert(self) -> PFN_vkVoidFunction {
                    match self {
                        Functions::Null => unsafe {
                            mem::transmute::<*const (), PFN_vkVoidFunction>(ptr::null())
                        },
                        $(
                            Functions::$pfn(foo) => unsafe { mem::transmute(foo) },
                        )+
                    }
                }

                pub fn get_vk_func(s:&str) -> Option<Functions> {
                    match s {
                        $(
                            stringify!([<vk $pfn>]) => Some(Functions::$pfn($func)),
                        )+

                        _ => None
                    }
                }
            }
        }

    };
}

create_functions_enum!(
    [CreateInstance, create_instance],
    [DestroyInstance, destroy_instance],
    [CreateDevice, create_device],
    [DestroyDevice, destroy_device],
    [CreateSwapchainKHR, create_swapchain],
    [AcquireNextImageKHR, acquire_next_image],
    [QueuePresentKHR, present_queue],
);