public static RootSignature FromString(CommonContext context, string s)
{
RootSignature rootSignature;
if (context.rootSignatures.TryGetValue(s, out rootSignature))
{
return(rootSignature);
}
rootSignature = new RootSignature();
context.rootSignatures[s] = rootSignature;
RootSignatureParamP[] desc = new RootSignatureParamP[s.Length];
for (int i = 0; i < s.Length; i++)
{
char c = s[i];
switch (c)
{
case 'C':
desc[i] = RootSignatureParamP.CBV;
break;
case 'c':
desc[i] = RootSignatureParamP.CBVTable;
break;
case 'S':
desc[i] = RootSignatureParamP.SRV;
break;
case 's':
desc[i] = RootSignatureParamP.SRVTable;
break;
case 'U':
desc[i] = RootSignatureParamP.UAV;
break;
case 'u':
desc[i] = RootSignatureParamP.UAVTable;
break;
default:
throw new NotImplementedException("error root signature desc.");
break;
}
}
context.device.CreateRootSignature(rootSignature, desc);
return(rootSignature);
}
public void CreateRootSignature(RootSignature rootSignature, IList <RootSignatureParamP> types)
{
//static samplers
StaticSamplerDescription[] samplerDescription = new StaticSamplerDescription[4];
samplerDescription[0] = new StaticSamplerDescription(ShaderVisibility.All, 0, 0)
{
AddressU = TextureAddressMode.Clamp,
AddressV = TextureAddressMode.Clamp,
AddressW = TextureAddressMode.Clamp,
BorderColor = StaticBorderColor.OpaqueBlack,
ComparisonFunction = ComparisonFunction.Never,
Filter = Filter.MinMagMipLinear,
MipLODBias = 0,
MaxAnisotropy = 0,
MinLOD = 0,
MaxLOD = float.MaxValue,
ShaderVisibility = ShaderVisibility.All,
RegisterSpace = 0,
ShaderRegister = 0,
};
samplerDescription[1] = samplerDescription[0];
samplerDescription[2] = samplerDescription[0];
samplerDescription[3] = samplerDescription[0];
samplerDescription[1].ShaderRegister = 1;
samplerDescription[2].ShaderRegister = 2;
samplerDescription[3].ShaderRegister = 3;
samplerDescription[1].MaxAnisotropy = 16;
samplerDescription[1].Filter = Filter.Anisotropic;
samplerDescription[2].ComparisonFunction = ComparisonFunction.Less;
samplerDescription[2].Filter = Filter.ComparisonMinMagMipLinear;
samplerDescription[3].Filter = Filter.MinMagMipPoint;
RootParameter1[] rootParameters = new RootParameter1[types.Count];
int cbvCount = 0;
int srvCount = 0;
int uavCount = 0;
rootSignature.cbv.Clear();
rootSignature.srv.Clear();
rootSignature.uav.Clear();
for (int i = 0; i < types.Count; i++)
{
RootSignatureParamP t = types[i];
switch (t)
{
case RootSignatureParamP.CBV:
rootParameters[i] = new RootParameter1(RootParameterType.ConstantBufferView, new RootDescriptor1(cbvCount, 0), ShaderVisibility.All);
rootSignature.cbv[cbvCount] = i;
cbvCount++;
break;
case RootSignatureParamP.SRV:
rootParameters[i] = new RootParameter1(RootParameterType.ShaderResourceView, new RootDescriptor1(srvCount, 0), ShaderVisibility.All);
rootSignature.srv[srvCount] = i;
srvCount++;
break;
case RootSignatureParamP.UAV:
rootParameters[i] = new RootParameter1(RootParameterType.UnorderedAccessView, new RootDescriptor1(uavCount, 0), ShaderVisibility.All);
rootSignature.uav[uavCount] = i;
uavCount++;
break;
case RootSignatureParamP.CBVTable:
rootParameters[i] = new RootParameter1(new RootDescriptorTable1(new DescriptorRange1(DescriptorRangeType.ConstantBufferView, 1, cbvCount)), ShaderVisibility.All);
rootSignature.cbv[cbvCount] = i;
cbvCount++;
break;
case RootSignatureParamP.SRVTable:
rootParameters[i] = new RootParameter1(new RootDescriptorTable1(new DescriptorRange1(DescriptorRangeType.ShaderResourceView, 1, srvCount)), ShaderVisibility.All);
rootSignature.srv[srvCount] = i;
srvCount++;
break;
case RootSignatureParamP.UAVTable:
rootParameters[i] = new RootParameter1(new RootDescriptorTable1(new DescriptorRange1(DescriptorRangeType.UnorderedAccessView, 1, uavCount)), ShaderVisibility.All);
rootSignature.uav[uavCount] = i;
uavCount++;
break;
}
}
RootSignatureDescription1 rootSignatureDescription = new RootSignatureDescription1();
rootSignatureDescription.StaticSamplers = samplerDescription;
rootSignatureDescription.Flags = RootSignatureFlags.AllowInputAssemblerInputLayout;
rootSignatureDescription.Parameters = rootParameters;
rootSignature.rootSignature = device.CreateRootSignature <ID3D12RootSignature>(0, rootSignatureDescription);
}
