Texture fail to render - DirectX 9 - c++

Question

I have this code in DirectX 9, in which I need to get the DC from a COM interface and draw it. I do get the DC and it contains the image, but I get a black screen. Any ideas why?
LPDIRECT3DSURFACE9 pRenderSurface = NULL, pRenderSurfaceTMP = NULL;
m_pRenderTexture->GetSurfaceLevel(0, &pRenderSurface);
if (pRenderSurface == NULL)
return FALSE;
m_pD3DDevice->CreateOffscreenPlainSurface(m_nWidth, m_nHeight,
D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM, &pRenderSurfaceTMP, 0);
m_pD3DDevice->GetRenderTargetData(pRenderSurface,pRenderSurfaceTMP);
HDC hDC = NULL;
hr = pRenderSurfaceTMP->GetDC(&hDC);
if (FAILED(hr))
return FALSE;
if (m_pViewObject != NULL)
{
// RECT is relative to the windowless container rect
RECTL rcRect = {0, 0, m_nWidth, m_nHeight};
// Draw onto the DC!
hr = m_pViewObject->Draw(DVASPECT_CONTENT, 1,
NULL, NULL, NULL, hDC, &rcRect, NULL, NULL,
0);
}
pRenderSurface->ReleaseDC(hDC);
pRenderSurface->Release();
// Draw the surface
m_pD3DDevice->SetStreamSource( 0, m_pVertexBuffer, 0, sizeof(Vertex) );
m_pD3DDevice->SetTexture( 0, m_pRenderTexture );
hr = m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);
m_hbrBackground = NULL;
pRenderSurfaceTMP->Release();
Thanks in advance

Answer 1

Make sure that m_pRenderTexture is created with D3DUSAGE_RENDERTARGET. The size and format of both pRenderSurface and pRenderSurfaceTMP should match. For more info, see when GetRenderTargetData fails: http://msdn.microsoft.com/en-us/library/windows/desktop/bb174405(v=vs.85).aspx

Answer 2

Try this:
m_pD3DDevice->CreateTexture(m_nWidth, m_nHeight, 1, 0, D3DFMT_X8R8G8B8,
D3DPOOL_MANAGED, &m_pRenderTexture, NULL);
// ...
LPDIRECT3DSURFACE9 pRenderSurface = NULL;
if (FAILED(m_pRenderTexture->GetSurfaceLevel(0, &pRenderSurface))) return FALSE;
HDC hDC = NULL;
if (FAILED(pRenderSurface->GetDC(&hDC))) return FALSE;
if (m_pViewObject != NULL)
{
RECTL rcRect = {0, 0, m_nWidth, m_nHeight};
m_pViewObject->Draw(DVASPECT_CONTENT, 1,
NULL, NULL, NULL, hDC, &rcRect, NULL, NULL, 0);
}
pRenderSurface->ReleaseDC(hDC);
pRenderSurface->Release();
m_pD3DDevice->SetStreamSource( 0, m_pVertexBuffer, 0, sizeof(Vertex) );
m_pD3DDevice->SetTexture( 0, m_pRenderTexture );
m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);
or this:
m_pD3DDevice->CreateTexture(m_nWidth, m_nHeight, 1, 0, D3DFMT_X8R8G8B8,
D3DPOOL_DEFAULT, &m_pRenderTexture, NULL);
// ...
LPDIRECT3DSURFACE9 pRenderSurfaceTMP = NULL;
m_pD3DDevice->CreateOffscreenPlainSurface(m_nWidth, m_nHeight,
D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM, &pRenderSurfaceTMP, 0);
HDC hDC = NULL;
if (FAILED(pRenderSurfaceTMP->GetDC(&hDC))) return FALSE;
if (m_pViewObject != NULL)
{
RECTL rcRect = {0, 0, m_nWidth, m_nHeight};
m_pViewObject->Draw(DVASPECT_CONTENT, 1,
NULL, NULL, NULL, hDC, &rcRect, NULL, NULL, 0);
}
pRenderSurfaceTMP->ReleaseDC(hDC);
LPDIRECT3DSURFACE9 pRenderSurface = NULL;
if (FAILED(m_pRenderTexture->GetSurfaceLevel(0, &pRenderSurface)))
return FALSE;
if (FAILED(m_pD3DDevice->UpdateSurface(pRenderSurfaceTMP, NULL,
pRenderSurface, NULL))) return FALSE;
pRenderSurface->Release();
m_pD3DDevice->SetStreamSource( 0, m_pVertexBuffer, 0, sizeof(Vertex) );
m_pD3DDevice->SetTexture( 0, m_pRenderTexture );
m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);