static uint32 CountAdapterOutputs(TRefCountPtr<IDXGIAdapter>& Adapter)
{
uint32 OutputCount = 0;
for(;;)
{
TRefCountPtr<IDXGIOutput> Output;
HRESULT hr = Adapter->EnumOutputs(OutputCount, Output.GetInitReference());
if(FAILED(hr))
{
break;
}
++OutputCount;
}
return OutputCount;
}
/**
* Returns a supported screen resolution that most closely matches the input.
* @param Width - Input: Desired resolution width in pixels. Output: A width that the platform supports.
* @param Height - Input: Desired resolution height in pixels. Output: A height that the platform supports.
*/
void FD3D11DynamicRHI::RHIGetSupportedResolution( uint32 &Width, uint32 &Height )
{
uint32 InitializedMode = false;
DXGI_MODE_DESC BestMode;
BestMode.Width = 0;
BestMode.Height = 0;
{
HRESULT hr = S_OK;
TRefCountPtr<IDXGIAdapter> Adapter;
hr = DXGIFactory->EnumAdapters(ChosenAdapter,Adapter.GetInitReference());
if( DXGI_ERROR_NOT_FOUND == hr )
{
return;
}
if( FAILED(hr) )
{
return;
}
// get the description of the adapter
DXGI_ADAPTER_DESC AdapterDesc;
VERIFYD3D11RESULT(Adapter->GetDesc(&AdapterDesc));
// Enumerate outputs for this adapter
// TODO: Cap at 1 for default output
for(uint32 o = 0;o < 1; o++)
{
TRefCountPtr<IDXGIOutput> Output;
hr = Adapter->EnumOutputs(o,Output.GetInitReference());
if(DXGI_ERROR_NOT_FOUND == hr)
break;
if(FAILED(hr))
return;
// TODO: GetDisplayModeList is a terribly SLOW call. It can take up to a second per invocation.
// We might want to work around some DXGI badness here.
DXGI_FORMAT Format = DXGI_FORMAT_R8G8B8A8_UNORM;
uint32 NumModes = 0;
hr = Output->GetDisplayModeList(Format,0,&NumModes,NULL);
if(hr == DXGI_ERROR_NOT_FOUND)
{
return;
}
else if(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE)
{
UE_LOG(LogD3D11RHI, Fatal,
TEXT("This application cannot be run over a remote desktop configuration")
);
return;
}
DXGI_MODE_DESC* ModeList = new DXGI_MODE_DESC[ NumModes ];
VERIFYD3D11RESULT(Output->GetDisplayModeList(Format,0,&NumModes,ModeList));
for(uint32 m = 0;m < NumModes;m++)
{
// Search for the best mode
// Suppress static analysis warnings about a potentially out-of-bounds read access to ModeList. This is a false positive - Index is always within range.
CA_SUPPRESS( 6385 );
bool IsEqualOrBetterWidth = FMath::Abs((int32)ModeList[m].Width - (int32)Width) <= FMath::Abs((int32)BestMode.Width - (int32)Width);
bool IsEqualOrBetterHeight = FMath::Abs((int32)ModeList[m].Height - (int32)Height) <= FMath::Abs((int32)BestMode.Height - (int32)Height);
if(!InitializedMode || (IsEqualOrBetterWidth && IsEqualOrBetterHeight))
{
BestMode = ModeList[m];
InitializedMode = true;
}
}
delete[] ModeList;
}
}
check(InitializedMode);
Width = BestMode.Width;
Height = BestMode.Height;
}