DirectDraw issue - launching an application as a regular Windows application
I am developing a video recording application and I want to overlay a video preview with logo and recording timer.
I tried to launch a full screen app and everything worked fine. Then I tried to run the application as a normal Windows application and it returned an error.
Can anyone take a look at the code below if there is a way to change it to run the application as a normal Windows application?
HRESULT CViewfinderRenderer::OnStartStreaming()
{
HRESULT hr = S_OK;
DDSURFACEDESC ddsd;
m_pDD = NULL;
//full screen settings
hr = DirectDrawCreate(NULL, &m_pDD, NULL);
hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_FULLSCREEN);
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps = DDSCAPS_FLIP | DDSCAPS_PRIMARYSURFACE;
ddsd.dwBackBufferCount = 1;
//end full screen settings
//normal settings
/*hr = DirectDrawCreate(NULL, &m_pDD, NULL);
hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_NORMAL);
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_BACKBUFFERCOUNT;
ddsd.dwBackBufferCount = 1;*/
//end normal settings
hr = m_pDD->CreateSurface(&ddsd, &m_pSurface, NULL);
if (hr != DD_OK) {
return hr;
}
// Get backsurface
hr = m_pSurface->EnumAttachedSurfaces(&m_pBackSurface, EnumFunction);
return S_OK;
}
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2 answers
Even when working with windows, you need to create a primary surface, only it is not a repelling surface.
//full screen settings
hr = DirectDrawCreate(NULL, &m_pDD, NULL);
hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_NORMAL);
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
In addition to creating the surface, you will most likely want to create a clipper for the window. For a complete sample, see the Launching Windows section in this GameDev article .
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