[vulkan] Remove VulkanFn wrapper

Not really necessary, and apparently this is causing trouble on GCC 10.1.

Fixes #1620.

src/vulkan/vulkan_loader.h

@@ -3,7 +3,11 @@
 #include "../util/rc/util_rc.h"
 #include "../util/rc/util_rc_ptr.h"
 
-#include "vulkan_loader_fn.h"
+#define VK_USE_PLATFORM_WIN32_KHR 1
+#include <vulkan/vulkan.h>
+
+#define VULKAN_FN(name) \
+  ::PFN_ ## name name = reinterpret_cast<::PFN_ ## name>(sym(#name))
 
 namespace dxvk::vk {
   

src/vulkan/vulkan_loader_fn.h

@@ -1,63 +0,0 @@
-#pragma once
-
-/*
- * In 32-bit winelib build, alignment of Vulkan structures may be different than what
- * native C++ compiler expects. Wine exposes an extension, intended for winelib
- * applications, that exposes native Vulkan APIs with win32 additions, but using
- * native ABI.
- */
-#ifdef __WINE__
-#pragma push_macro("_WIN32")
-#undef _WIN32
-#endif
-
-#define VK_USE_PLATFORM_WIN32_KHR 1
-#include <vulkan/vulkan.h>
-
-#ifdef __WINE__
-#pragma pop_macro("_WIN32")
-#endif
-
-#define VULKAN_FN(name) \
-  VulkanFn<::PFN_ ## name> name = sym(#name)
-
-namespace dxvk::vk {
-  
-  template<typename Fn>
-  class VulkanFn;
-  
-  /**
-   * \brief Vulkan function
-   * 
-   * Wraps an Vulkan function pointer and provides
-   * a call operator using the correct types.
-   */
-  template<typename Ret, typename... Args>
-  class VulkanFn<Ret (VKAPI_PTR*)(Args...)> {
-    using Fn = Ret (VKAPI_PTR*)(Args...);
-  public:
-    
-    VulkanFn() { }
-    VulkanFn(Fn ptr)
-    : m_fn(ptr) { }
-    
-    VulkanFn(PFN_vkVoidFunction ptr)
-    : m_fn(reinterpret_cast<Fn>(ptr)) { }
-    
-    /**
-     * \brief Invokes Vulkan function
-     * 
-     * \param [in] args Arguments
-     * \returns Function return value
-     */
-    Ret operator () (Args... args) const {
-      return (*m_fn)(args...);
-    }
-    
-  private:
-    
-    Fn m_fn = nullptr;
-    
-  };
-  
-}

src/vulkan/vulkan_names.h

@@ -4,7 +4,7 @@
 
 #include "../util/util_enum.h"
 
-#include "vulkan_loader_fn.h"
+#include "vulkan_loader.h"
 
 std::ostream& operator << (std::ostream& os, VkPipelineCacheHeaderVersion e);
 std::ostream& operator << (std::ostream& os, VkResult e);

src/vulkan/vulkan_util.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "vulkan_loader_fn.h"
+#include "vulkan_loader.h"
 
 namespace dxvk::vk {