[dxvk] Support for SDL2 WSI

src/dxvk/meson.build

@@ -105,8 +105,6 @@ dxvk_src = [
   'dxvk_unbound.cpp',
   'dxvk_util.cpp',
 
-  'platform/dxvk_win32_exts.cpp',
-
   'hud/dxvk_hud.cpp',
   'hud/dxvk_hud_font.cpp',
   'hud/dxvk_hud_item.cpp',
@@ -120,6 +118,16 @@ if platform == 'windows'
   ]
 endif
 
+if dxvk_wsi == 'win32'
+  dxvk_src += [
+    'platform/dxvk_win32_exts.cpp'
+  ]
+elif dxvk_wsi == 'sdl2'
+  dxvk_src += [
+    'platform/dxvk_sdl2_exts.cpp'
+  ]
+endif
+
 thread_dep = dependency('threads')
 
 dxvk_lib = static_library('dxvk', dxvk_src, glsl_generator.process(dxvk_shaders), dxvk_version,

src/dxvk/platform/dxvk_sdl2_exts.cpp

@@ -0,0 +1,60 @@
+#include "../dxvk_platform_exts.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_vulkan.h>
+
+namespace dxvk {
+
+  DxvkPlatformExts DxvkPlatformExts::s_instance;
+
+  std::string_view DxvkPlatformExts::getName() {
+    return "SDL2 WSI";
+  }
+
+
+  DxvkNameSet DxvkPlatformExts::getInstanceExtensions() {
+    SDL_Window* window = SDL_CreateWindow(
+      "Dummy Window",
+      SDL_WINDOWPOS_UNDEFINED,
+      SDL_WINDOWPOS_UNDEFINED,
+      1, 1,
+      SDL_WINDOW_HIDDEN | SDL_WINDOW_VULKAN);
+
+    if (window == nullptr)
+      throw DxvkError(str::format("SDL2 WSI: Failed to create dummy window. ", SDL_GetError()));
+
+    uint32_t extensionCount = 0;
+    if (!SDL_Vulkan_GetInstanceExtensions(window, &extensionCount, nullptr))
+      throw DxvkError(str::format("SDL2 WSI: Failed to get instance extension count. ", SDL_GetError()));
+
+    auto extensionNames = std::vector<const char *>(extensionCount);
+    if (!SDL_Vulkan_GetInstanceExtensions(window, &extensionCount, extensionNames.data()))
+      throw DxvkError(str::format("SDL2 WSI: Failed to get instance extensions. ", SDL_GetError()));
+
+    DxvkNameSet names;
+    for (const char* name : extensionNames)
+      names.add(name);
+
+    SDL_DestroyWindow(window);
+
+    return names;
+  }
+
+
+  DxvkNameSet DxvkPlatformExts::getDeviceExtensions(
+          uint32_t      adapterId) {
+    return DxvkNameSet();
+  }
+  
+
+  void DxvkPlatformExts::initInstanceExtensions() {
+
+  }
+
+
+  void DxvkPlatformExts::initDeviceExtensions(
+    const DxvkInstance* instance) {
+
+  }
+
+}