I've got a problem when my application tries to recover from an Alt-Tab. Basically, everything appears to work, except the graphics don't render anymore.
I'm initialising D3D as follows:
HRESULT InitD3D( HWND hWnd )
{
if( NULL == ( g_pD3D = Direct3DCreate8( D3D_SDK_VERSION ) ) )
{
SetError ( "Unable to Create D3D Object." );
return E_FAIL;
}
D3DDISPLAYMODE d3ddm;
if( FAILED( g_pD3D->GetAdapterDisplayMode( D3DADAPTER_DEFAULT, &d3ddm ) ) )
{
SetError ( "Unable to get previous screen resolution." );
return E_FAIL;
}
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp, sizeof(d3dpp) );
d3dpp.BackBufferWidth = Width;
d3dpp.BackBufferHeight = Height;
d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
d3dpp.BackBufferCount = 1;
d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.hDeviceWindow = hWnd;
d3dpp.Windowed = FALSE;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
d3dpp.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
d3dpp.FullScreen_PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
d3dpp.Flags = 0;
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice ) ) )
{
SetError ( " Unable to create D3D Device." );
return E_FAIL;
}
DeviceWidth = Width;
DeviceHeight = Height;
g_pSavedPresentParameters = d3dpp;
if ( FAILED ( g_pd3dDevice->GetBackBuffer ( 0, D3DBACKBUFFER_TYPE_MONO, &g_pBackSurface ) ) )
{
SetError ( "Unable to acquire Back Buffer" );
return E_FAIL;
}
g_pd3dDevice->SetRenderState( D3DRS_AMBIENT, 0xffffffff );
return S_OK;
}
I initialize graphics like such:
...
LPD3DXBUFFER pSShipMtrlBuf;
if( FAILED( D3DXLoadMeshFromX( "Space Ship.x", D3DXMESH_MANAGED, g_pd3dDevice, NULL,
&pSShipMtrlBuf, &SpaceShipNumMat, &SpaceShipMesh ) ) )
{
SetError ("Unable to load space ship mesh");
return E_FAIL;
}
d3dxMaterials = (D3DXMATERIAL*)pSShipMtrlBuf->GetBufferPointer();
SpaceShipMaterials = new D3DMATERIAL8[SpaceShipNumMat];
SpaceShipTextures = new LPDIRECT3DTEXTURE8[SpaceShipNumMat];
for( DWORD i=0; i<SpaceShipNumMat; i++ )
{
SpaceShipMaterials[i] = d3dxMaterials[i].MatD3D;
SpaceShipMaterials[i].Ambient = SpaceShipMaterials[i].Diffuse; // Change This Later?
if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, d3dxMaterials[i].pTextureFilename, &SpaceShipTextures[i] ) ) )
{
SetError ( "Unable to create texture for the space ship." );
SpaceShipTextures[i] = NULL;
}
}
pSShipMtrlBuf->Release();
...
And I'm running the following code before I render:
HRESULT ValidateDevice ()
{
HRESULT R = NULL;
R = g_pd3dDevice -> TestCooperativeLevel ();
if ( FAILED ( R ) )
{
if ( R == D3DERR_DEVICELOST )
return E_FAIL;
if ( R == D3DERR_DEVICENOTRESET )
{
g_pBackSurface->Release ();
if ( FAILED ( g_pd3dDevice->Reset ( &g_pSavedPresentParameters ) ) )
{
SetError ( "Could Not Reset Device." );
PostQuitMessage ( E_FAIL );
return E_FAIL;
}
if ( FAILED ( g_pd3dDevice->GetBackBuffer ( 0, D3DBACKBUFFER_TYPE_MONO, &g_pBackSurface ) ) )
{
SetError ( "Unable to re-acquire Back Buffer" );
PostQuitMessage ( 0 );
return E_FAIL;
}
g_pd3dDevice->Clear ( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB ( 0, 0, 0 ), 0.0f, 0);
}
}
return S_OK;
}
It seems to me that by using D3DXMESH_MANAGED when I load the mesh and D3DXCreateTextureFromFile both should be in the D3DPOOL_MANAGED and should resore by themselves. I've also tried releasing all mesh resources and reloading, but still nothing. I've spent two days on this and can't see what I'm doing wrong. The DirectX documentation has too much Microsoft-ese to really make since and I've tried everything I've seen posted in this forum for this. Any ideas?
[edited by - JimboC on July 30, 2002 2:01:30 PM]
