use INVALID_SOCKET instead of -1 to avoid signed/unsigned comparison warning

[wxWidgets.git] / src / dfb / wrapdfb.cpp

diff --git a/src/dfb/wrapdfb.cpp b/src/dfb/wrapdfb.cpp
index e05ad09541b4500b12a8271234b739d97c170a6b..c474b48e2b44c8482e0e7be30d40f4575888aaf8 100644 (file)
--- a/src/dfb/wrapdfb.cpp
+++ b/src/dfb/wrapdfb.cpp
@@ -105,7 +105,13 @@ wxIDirectFBSurfacePtr wxIDirectFB::GetPrimarySurface()
 {
     DFBSurfaceDescription desc;
     desc.flags = DSDESC_CAPS;
-    desc.caps = DSCAPS_PRIMARY;
+    // NB: see dcscreen.cpp for why we request double-buffered surface
+    //
+    //     This assumes the cooperative level is DFSCL_NORMAL (that's the
+    //     default and wx doesn't modify it anywhere); if we ever support
+    //     other cooperative levels, DSCAPS_DOUBLE should *not* be used with
+    //     them.
+    desc.caps = DFBSurfaceCapabilities(DSCAPS_PRIMARY | DSCAPS_DOUBLE);
     return CreateSurface(&desc);
 }