wined3d: Use PBOs for dynamic volumes.

dlls/wined3d/utils.c

@@ -3720,6 +3720,7 @@ const char *wined3d_debug_location(DWORD location)
 #define LOCATION_TO_STR(u) if (location & u) { strcat(buf, " | "#u); location &= ~u; }
     LOCATION_TO_STR(WINED3D_LOCATION_DISCARDED);
     LOCATION_TO_STR(WINED3D_LOCATION_SYSMEM);
+    LOCATION_TO_STR(WINED3D_LOCATION_BUFFER);
     LOCATION_TO_STR(WINED3D_LOCATION_TEXTURE_RGB);
 #undef LOCATION_TO_STR
     if (location) FIXME("Unrecognized location flag(s) %#x.\n", location);

dlls/wined3d/wined3d_private.h

@@ -920,7 +920,7 @@ enum wined3d_ffp_emit_idx
 struct wined3d_bo_address
 {
     GLuint buffer_object;
-    const BYTE *addr;
+    BYTE *addr;
 };
 
 struct wined3d_stream_info_element
@@ -2053,10 +2053,12 @@ void wined3d_texture_set_dirty(struct wined3d_texture *texture, BOOL dirty) DECL
 
 #define WINED3D_VFLAG_LOCKED            0x00000001
 #define WINED3D_VFLAG_ALLOCATED         0x00000002
+#define WINED3D_VFLAG_PBO               0x00000004
 
 #define WINED3D_LOCATION_DISCARDED      0x00000001
 #define WINED3D_LOCATION_SYSMEM         0x00000002
-#define WINED3D_LOCATION_TEXTURE_RGB    0x00000004
+#define WINED3D_LOCATION_BUFFER         0x00000004
+#define WINED3D_LOCATION_TEXTURE_RGB    0x00000008
 
 const char *wined3d_debug_location(DWORD location) DECLSPEC_HIDDEN;
 
@@ -2068,6 +2070,7 @@ struct wined3d_volume
     DWORD flags, locations;
     GLint texture_level;
     DWORD download_count;
+    GLuint pbo;
 };
 
 static inline struct wined3d_volume *volume_from_resource(struct wined3d_resource *resource)