D3D12: Support msaa on the default render target

Pick up window->format().samples() and use it. There is nothing that does
resolving and extra buffer management for us, do it all manually.

Change-Id: I76206574a24dfdd17120433e924a9841c9854904
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/manual/nodetypes/nodetypes.cpp b/tests/manual/nodetypes/nodetypes.cpp
index c5b46a3317..3e82fc7d04 100644
--- a/tests/manual/nodetypes/nodetypes.cpp
+++ b/tests/manual/nodetypes/nodetypes.cpp
@@ -70,6 +70,12 @@ int main(int argc, char **argv)
 
     Helper helper;
     QQuickView view;
+    if (app.arguments().contains(QLatin1String("--multisample"))) {
+        qDebug("Requesting sample count 4");
+        QSurfaceFormat fmt;
+        fmt.setSamples(4);
+        view.setFormat(fmt);
+    }
     view.engine()->rootContext()->setContextProperty(QLatin1String("helper"), &helper);
     view.setResizeMode(QQuickView::SizeRootObjectToView);
     view.resize(1024, 768);