Occur _com_error when using CreateHwndRenderTarget() - direct2d

Question

I use Direct2D to render the animation on VS2010. But when I create over 100 animation objects (the limitation amount is variable),
the output window shows the error message:
"First-chance exception at 0x7607C42D in StarrySky.exe: Microsoft C++
exception: _com_error at memory location 0x001C9580."
However, the error does not interupt the program, and the animation object's seems correct.
I trace the code and find out the error message print after calling
hr = m_pD2DFactory->CreateHwndRenderTarget(renderTargetProperties,
D2D1::HwndRenderTargetProperties(this->m_hWnd, size), &m_pRT);
But the return hr is S_OK. Does anyone know the reason or the solution?

Answer 1

In Direct2D, make sure you are instantiating the device independent resources (In Constructor or something - Init_D2D() in this code example) before device dependent resources. For instance,
// In your header files
ID2D1Factory* pD2DFactory; // device independent
ID2D1HwndRenderTarget* pRenderTarget;
// In the source files
void Init_D2D() // probably in constructor
{
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE_SINGLE_THREADED, &pD2DFactory);
}
void Create_D2D_Device_Dep() //before drawing
{
if(pRenderTarget == NULL) //if it exists, do not create again
{
HRESULT hr = pD2DFactory->CreateHwndRenderTarget(
D2D1::RenderTargetProperties(),
D2D1::HwndRenderTargetProperties(m_hWnd,
D2D1::SizeU((UINT32)m_pRect.right, (UINT32)m_pRectWindow.bottom)),
&pRenderTarget);
}
}
OnPaint() method should be something like this,
void CPlotterView::OnPaint_D2D()
{
HRESULT hr;
hr = Create_D2D_Device_Dep();
if (SUCCEEDED(hr))
{
//pRenderTarget->SetAntialiasMode(D2D1_ANTIALIAS_MODE_ALIASED);
pRenderTarget->BeginDraw();
D2D1_SIZE_F renderTargetSize = pRenderTarget->GetSize();
pRenderTarget->SetTransform(D2D1::Matrix3x2F::Identity());
pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::LightYellow));
// Drawlines or ellipses using pRenderTarget->DrawEllipse() or something
hr = pRenderTarget->EndDraw();
}
if (hr == D2DERR_RECREATE_TARGET)
{
Free_D2D_Device_Dep();
}
else
{
::ValidateRect(m_hWnd, NULL);
}
}
At the end, do not forget to close/release the resources, in the same order you opened.