immediateContext.OMSetRenderTargets(1, ppRTV, null);
ppRTV.release();
// Set viewport
D3D11_VIEWPORT vp = new D3D11_VIEWPORT();
vp.Width(800).Height(600).MinDepth(0).MaxDepth(1).TopLeftX(0).TopLeftY(0);
immediateContext.RSSetViewports(1, pointerTo(vp));
// Clear screen with some color
final Pointer<Float> pColor = allocateFloats(4).setFloats(new float[] {0.7f, 0.8f, 0.3f, 1.0f});