SharpDX.DXGI.SampleDescription GetSampleDescription(uint samples)
{
SharpDX.DXGI.SampleDescription[] descs = new SharpDX.DXGI.SampleDescription[16];
samples = Math.Max(1u, Math.Min(samples, 16u));
descs[0].Count = 1;
descs[0].Quality = 0;
for (uint i = 1, last = 0; i < samples; i++)
{
SharpDX.Direct3D12.FeatureDataMultisampleQualityLevels levels = new SharpDX.Direct3D12.FeatureDataMultisampleQualityLevels();
levels.Format = _format;
levels.SampleCount = (int)i + 1;
levels.Flags = SharpDX.Direct3D12.MultisampleQualityLevelFlags.None;
levels.QualityLevelCount = 0;
_dev.CheckFeatureSupport(SharpDX.Direct3D12.Feature.MultisampleQualityLevels, ref levels);
if (levels.QualityLevelCount > 0)
{
descs[i].Count = levels.SampleCount;
descs[i].Quality = 0;
last = i;
}
else
{
descs[i] = descs[last];
}
}
return(descs[samples - 1]);
}
private void CreateDevice()
{
using (SharpDX.DXGI.Factory4 factory = new Factory4())
{
_dev = new SharpDX.Direct3D12.Device(factory.Adapters[0], FeatureLevel.Level_11_0);
}
int[] levels_ =
{
(int)FeatureLevel.Level_12_1,
(int)FeatureLevel.Level_12_0,
(int)FeatureLevel.Level_11_1,
(int)FeatureLevel.Level_11_0
};
GCHandle pinnedArray = GCHandle.Alloc(levels_, GCHandleType.Pinned);
IntPtr pointer = pinnedArray.AddrOfPinnedObject();
SharpDX.Direct3D.FeatureLevel level = FeatureLevel.Level_11_0;
SharpDX.Direct3D12.FeatureDataFeatureLevels levels = new FeatureDataFeatureLevels();
levels.FeatureLevelCount = levels_.Length;
levels.FeatureLevelsRequestedPointer = pointer;
if (_dev.CheckFeatureSupport(SharpDX.Direct3D12.Feature.FeatureLevels, ref levels))
{
level = levels.MaxSupportedFeatureLevel;
}
pinnedArray.Free();
System.Console.WriteLine($" Feature Level: {(((int)level) >> 12) & 0xF}_{(((int)level) >> 8) & 0xF}");
}
protected void InitDirect3D()
{
#if DEBUG
DebugInterface.Get().EnableDebugLayer();
#endif
_factory = new Factory4();
try
{
Adapter[] gpus = _factory.Adapters;
int n = gpus.Length;
// Try to create hardware device.
// Pass NULL to use the default adapter which is the first adapter that is enumerated by Factory.Adapters.
// Ref: https://msdn.microsoft.com/en-us/library/windows/desktop/dn770336(v=vs.85).aspx
if (n > 1)
{
Adapter dgpu = gpus[1]; //added by JO: ensures we use the dGPU (NVIDIA in my case)
Device = new Device(dgpu, FeatureLevel.Level_11_0);
}
else
{
Device = new Device(null, FeatureLevel.Level_11_0);
}
}
catch (SharpDXException)
{
// Fallback to WARP device.
Adapter warpAdapter = _factory.CreateSoftwareAdapter(_appInst);
Device = new Device(warpAdapter, FeatureLevel.Level_11_0);
}
Fence = Device.CreateFence(0, FenceFlags.None);
_fenceEvent = new AutoResetEvent(false);
RtvDescriptorSize = Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.RenderTargetView);
DsvDescriptorSize = Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.DepthStencilView);
CbvSrvUavDescriptorSize = Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
// Check 4X MSAA quality support for our back buffer format.
// All Direct3D 11 capable devices support 4X MSAA for all render
// target formats, so we only need to check quality support.
FeatureDataMultisampleQualityLevels msQualityLevels;
msQualityLevels.Format = BackBufferFormat;
msQualityLevels.SampleCount = 4;
msQualityLevels.Flags = MultisampleQualityLevelFlags.None;
msQualityLevels.QualityLevelCount = 0;
Debug.Assert(Device.CheckFeatureSupport(Feature.MultisampleQualityLevels, ref msQualityLevels));
_m4xMsaaQuality = msQualityLevels.QualityLevelCount;
#if DEBUG
LogAdapters();
#endif
CreateCommandObjects();
CreateSwapChain();
CreateRtvAndDsvDescriptorHeaps();
}
/// <summary>
/// Gets the maximum multisample count for a particular <see cref="PixelFormat" />.
/// </summary>
/// <param name="device">The device.</param>
/// <param name="pixelFormat">The pixelFormat.</param>
/// <returns>The maximum multisample count for this pixel pixelFormat</returns>
private static MultisampleCount GetMaximumMultisampleCount(SharpDX.Direct3D12.Device device, SharpDX.DXGI.Format pixelFormat)
{
SharpDX.Direct3D12.FeatureDataMultisampleQualityLevels qualityLevels;
qualityLevels.Format = pixelFormat;
qualityLevels.Flags = MultisampleQualityLevelFlags.None;
qualityLevels.QualityLevelCount = 0;
int maxCount = 1;
for (int i = 8; i >= 1; i /= 2)
{
qualityLevels.SampleCount = i;
if (device.CheckFeatureSupport(SharpDX.Direct3D12.Feature.MultisampleQualityLevels, ref qualityLevels))
{
maxCount = i;
break;
}
}
return((MultisampleCount)maxCount);
}
protected void InitDirect3D()
{
#if DEBUG
// The Direct3D 12 debug layer may or may not be installed. It's installation can be
// managed through settings page "Manage optional features" with a feature called
// "Graphics Tools".
// There may be a better solution to check for it instead of try/catch. If you happen
// to know, please consider opening an issue or PR in the repo.
try
{
DebugInterface.Get().EnableDebugLayer();
}
catch (SharpDXException ex) when(ex.Descriptor.NativeApiCode == "DXGI_ERROR_SDK_COMPONENT_MISSING")
{
Debug.WriteLine("Failed to enable debug layer. Please ensure \"Graphics Tools\" feature is enabled in Windows \"Manage optional feature\" settings page");
}
#endif
_factory = new Factory4();
try
{
// Try to create hardware device.
// Pass NULL to use the default adapter which is the first adapter that is enumerated by Factory.Adapters.
// Ref: https://msdn.microsoft.com/en-us/library/windows/desktop/dn770336(v=vs.85).aspx
Device = new Device(null, FeatureLevel.Level_11_0);
}
catch (SharpDXException)
{
// Fallback to WARP device.
Adapter warpAdapter = _factory.GetWarpAdapter();
Device = new Device(warpAdapter, FeatureLevel.Level_11_0);
}
Fence = Device.CreateFence(0, FenceFlags.None);
_fenceEvent = new AutoResetEvent(false);
RtvDescriptorSize = Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.RenderTargetView);
DsvDescriptorSize = Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.DepthStencilView);
CbvSrvUavDescriptorSize = Device.GetDescriptorHandleIncrementSize(
DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
// Check 4X MSAA quality support for our back buffer format.
// All Direct3D 11 capable devices support 4X MSAA for all render
// target formats, so we only need to check quality support.
FeatureDataMultisampleQualityLevels msQualityLevels;
msQualityLevels.Format = BackBufferFormat;
msQualityLevels.SampleCount = 4;
msQualityLevels.Flags = MultisampleQualityLevelFlags.None;
msQualityLevels.QualityLevelCount = 0;
Debug.Assert(Device.CheckFeatureSupport(Feature.MultisampleQualityLevels, ref msQualityLevels));
_m4xMsaaQuality = msQualityLevels.QualityLevelCount;
#if DEBUG
LogAdapters();
#endif
CreateCommandObjects();
CreateSwapChain();
CreateRtvAndDsvDescriptorHeaps();
}