[PATCH] wined3d: Add a registry key to configure buffer object placement

[Stefan Dösinger]

This can provide huge speed improvements in some games, but please test it properly
before recommending it in HOWTOs.
---
 dlls/wined3d/buffer.c          | 6 ++++++
 dlls/wined3d/wined3d_main.c    | 7 +++++++
 dlls/wined3d/wined3d_private.h | 4 ++++
 3 files changed, 17 insertions(+)

diff --git a/dlls/wined3d/buffer.c b/dlls/wined3d/buffer.c
index e9a07a5..8dfcb11 100644
--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -118,6 +118,12 @@ static void buffer_create_buffer_object(struct wined3d_buffer *This, const struc
     TRACE("Creating an OpenGL vertex buffer object for wined3d_buffer %p with usage %s.\n",
             This, debug_d3dusage(This->resource.usage));
 
+    if (wined3d_settings.placebo == PLACEBO_VIDMEM)
+    {
+        TRACE("Placing buffer %p in video memory\n", This);
+        glHint(This->buffer_type_hint, GL_FASTEST);
+    }
+
     /* Make sure that the gl error is cleared. Do not use checkGLcall
     * here because checkGLcall just prints a fixme and continues. However,
     * if an error during VBO creation occurs we can fall back to non-vbo operation
diff --git a/dlls/wined3d/wined3d_main.c b/dlls/wined3d/wined3d_main.c
index f49e5bc..d1b7153 100644
--- a/dlls/wined3d/wined3d_main.c
+++ b/dlls/wined3d/wined3d_main.c
@@ -85,6 +85,7 @@ struct wined3d_settings wined3d_settings =
     ~0U,            /* No VS shader model limit by default. */
     ~0U,            /* No GS shader model limit by default. */
     ~0U,            /* No PS shader model limit by default. */
+    PLACEBO_SYSMEM, /* Place buffers in sysmem by default */
 };
 
 /* Do not call while under the GL lock. */
@@ -309,6 +310,12 @@ static BOOL wined3d_dll_init(HINSTANCE hInstDLL)
             TRACE("Limiting GS shader model to %u.\n", wined3d_settings.max_sm_gs);
         if (!get_config_key_dword(hkey, appkey, "MaxShaderModelPS", &wined3d_settings.max_sm_ps))
             TRACE("Limiting PS shader model to %u.\n", wined3d_settings.max_sm_ps);
+        if (!get_config_key(hkey, appkey, "PlaceBO", buffer, size)
+                && !strcmp(buffer,"vidmem"))
+        {
+            TRACE("Attempting to place buffer objects in video memory for performance.\n");
+            wined3d_settings.placebo = PLACEBO_VIDMEM;
+        }
     }
 
     if (appkey) RegCloseKey( appkey );
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 2a11286..30ddc8a 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -246,6 +246,9 @@ static inline float float_24_to_32(DWORD in)
 #define PCI_VENDOR_NONE 0xffff /* e.g. 0x8086 for Intel and 0x10de for Nvidia */
 #define PCI_DEVICE_NONE 0xffff /* e.g. 0x14f for a Geforce6200 */
 
+#define PLACEBO_SYSMEM 0
+#define PLACEBO_VIDMEM 1
+
 /* NOTE: When adding fields to this structure, make sure to update the default
  * values in wined3d_main.c as well. */
 struct wined3d_settings
@@ -267,6 +270,7 @@ struct wined3d_settings
     unsigned int max_sm_vs;
     unsigned int max_sm_gs;
     unsigned int max_sm_ps;
+    unsigned int placebo;
 };
 
 extern struct wined3d_settings wined3d_settings DECLSPEC_HIDDEN;
-- 
1.8.1.5