ui: Force NVIDIA present method to native

Setting the NVIDIA driver Vulkan/OpenGL present method to
"Prefer layerd on DXGI Swapchain" with vsync enabled within xemu causes
framerate to be ~halved. This change overrides the driver setting to force
the legacy/native value to be used.

Resolves one identified issue with #2790

thirdparty/nvapi/nvapi.c

@@ -152,6 +152,18 @@ bool nvapi_setup_profile(NvApiProfileOpts opts)
         goto cleanup;
     }
 
+    NVDRS_SETTING setting_dxpresent = {
+        .version = NVDRS_SETTING_VER,
+        .settingId = OGL_CPL_PREFER_DXPRESENT_ID,
+        .settingType = NVDRS_DWORD_TYPE,
+        .u32CurrentValue = opts.present_method,
+    };
+    if (NvAPI_DRS_SetSetting(session, profile, &setting_dxpresent)) {
+        LOG("NvAPI_DRS_SetSetting for settingId %x failed",
+            setting_dxpresent.settingId);
+        goto cleanup;
+    }
+
     if (NvAPI_DRS_SaveSettings(session)) {
         LOG("NvAPI_DRS_SaveSettings failed");
         goto cleanup;

thirdparty/nvapi/nvapi.h

@@ -27,10 +27,19 @@
 #include <windows.h>
 #include <stdbool.h>
 
+enum EValues_OGL_CPL_PREFER_DXPRESENT {
+    OGL_CPL_PREFER_DXPRESENT_PREFER_DISABLED             = 0x00000000,
+    OGL_CPL_PREFER_DXPRESENT_PREFER_ENABLED              = 0x00000001,
+    OGL_CPL_PREFER_DXPRESENT_AUTO                        = 0x00000002,
+    OGL_CPL_PREFER_DXPRESENT_NUM_VALUES = 3,
+    OGL_CPL_PREFER_DXPRESENT_DEFAULT = OGL_CPL_PREFER_DXPRESENT_AUTO
+};
+
 typedef struct NvApiProfileOpts {
     const wchar_t *profile_name;
     const wchar_t *executable_name;
     bool threaded_optimization;
+    enum EValues_OGL_CPL_PREFER_DXPRESENT present_method;
 } NvApiProfileOpts;
 
 bool nvapi_init(void);

thirdparty/nvapi/nvapi_defs.h

@@ -32,6 +32,7 @@
 
 enum ESetting {
     OGL_THREAD_CONTROL_ID = 0x20C1221E,
+    OGL_CPL_PREFER_DXPRESENT_ID = 0x20D690F8,
 };
 
 enum EValues_OGL_THREAD_CONTROL {

ui/xemu.c

@@ -1257,6 +1257,7 @@ static void setup_nvidia_profile(void)
             .profile_name = L"xemu",
             .executable_name = exe_name,
             .threaded_optimization = false,
+            .present_method = OGL_CPL_PREFER_DXPRESENT_PREFER_DISABLED,
         });
         nvapi_finalize();
     }