From 7f23ad5563de455989fb55c072f5c15272f62626 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Sun, 30 Sep 2018 07:29:51 +0200
Subject: [PATCH] try to use D3DCREATE_HARDWARE_VERTEXPROCESSING |
 D3DCREATE_PUREDEVICE for better performance

---
 src/render_d3d9.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/src/render_d3d9.c b/src/render_d3d9.c
index 45121bc..449b611 100644
--- a/src/render_d3d9.c
+++ b/src/render_d3d9.c
@@ -154,15 +154,27 @@ DWORD WINAPI render_d3d9_main(void)
             D3dpp.BackBufferHeight = ddraw->render.height;
             D3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
             D3dpp.BackBufferCount = 1;
-
-            D3d->lpVtbl->CreateDevice(
-                D3d,
-                D3DADAPTER_DEFAULT,
-                D3DDEVTYPE_HAL,
-                ddraw->hWnd,
+            
+            DWORD behaviorFlags[] = {
+                D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE,
+                D3DCREATE_HARDWARE_VERTEXPROCESSING,
+                D3DCREATE_MIXED_VERTEXPROCESSING,
                 D3DCREATE_SOFTWARE_VERTEXPROCESSING,
-                &D3dpp,
-                &D3ddev);
+            };
+
+            int i;
+            for (i = 0; i < sizeof(behaviorFlags)/sizeof(behaviorFlags[0]); i++)
+            {
+                if (SUCCEEDED(D3d->lpVtbl->CreateDevice(
+                    D3d,
+                    D3DADAPTER_DEFAULT,
+                    D3DDEVTYPE_HAL,
+                    ddraw->hWnd,
+                    D3DCREATE_NOWINDOWCHANGES | behaviorFlags[i],
+                    &D3dpp,
+                    &D3ddev)))
+                        break;
+            }
 
             if (D3ddev)
                 InitDirect3D(FALSE);