If swapBehavior is TripleBuffer, set WGL_DOUBLE_BUFFER_ARB to TRUE

Previously, if the drivers' swap behaviour was single-buffered
it would fallthrough (just like DefaultSwapBehavior) and remain
single-buffered.

Change-Id: I4b93ad7a49094aa992d0b8fb3429c163bbbf655d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Kim M. Kalland <kim.kalland@nokia.com>

diff --git a/src/plugins/platforms/windows/qwindowsglcontext.cpp b/src/plugins/platforms/windows/qwindowsglcontext.cpp
index cabc597..4a67130 100644 (file)
--- a/src/plugins/platforms/windows/qwindowsglcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsglcontext.cpp
@@ -384,13 +384,13 @@ static int choosePixelFormat(HDC hdc,
     iAttributes[i++] = 24;
     switch (format.swapBehavior()) {
     case QSurfaceFormat::DefaultSwapBehavior:
     iAttributes[i++] = 24;
     switch (format.swapBehavior()) {
     case QSurfaceFormat::DefaultSwapBehavior:

-    case QSurfaceFormat::TripleBuffer:

         break;
     case QSurfaceFormat::SingleBuffer:
         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
         iAttributes[i++] = FALSE;
         break;
     case QSurfaceFormat::DoubleBuffer:
         break;
     case QSurfaceFormat::SingleBuffer:
         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
         iAttributes[i++] = FALSE;
         break;
     case QSurfaceFormat::DoubleBuffer:

+    case QSurfaceFormat::TripleBuffer:

         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
         iAttributes[i++] = TRUE;
         break;
         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
         iAttributes[i++] = TRUE;
         break;