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Problem of drawing text on Visual3d_Layer.

DY's picture
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Hello.
I use DrawText() on Visual3D_Layer.
When a state of a window to be minimize and restore, rectangles and polylines are correctly displaying but nevertheless the text is hidden.

My code;

// Get over layer
// aView is Handle(V3d_View).
Handle(Visual3d_Layer) myLayer = aView->View()->OverLayer();
if (myLayer.IsNull()) {
myLayer = new Visual3d_Layer(aView->View()->ViewManager(), Aspect_TOL_OVERLAY, Standard_True);
}

myLayer->Begin();
{
// Init layout
myLayer->SetViewport(width, height); // Window size
myLayer->SetOrtho(0, width, height, 0, (Aspect_TypeOfConstraint)-1);

myLayer->SetTextAttributes("Courier", Aspect_TODT_NORMAL, Quantity_Color(Quantity_NOC_WHITE));
myLayer->DrawText((Standard_CString)"Thanks OpenCASCADE Technorogy!", 100, 100, 18);
}
myLayer->End();

aView->Redraw();

My environment is Microsoft Windows 7 (32bit) with OCCT version 6.7.1.
The video card is NVIDIA NVS 3100M.

I tryed in the another mathicnes with the same executable binary,

Windows XP 32bit / NVIDIA NVS3100M: OK
Windows 7 32bit / Intel Graphics(on board): OK
Windows 7 64 bit / Intel Graphics(on board): OK
Windows XP 32bit / Intel Graphics(on board): Crash with raising memory allocation exception at Visual3D_Layer::DrawText().

How can I fix my code for displaying text?
Thanks.