FVulkanSamplerState::FVulkanSamplerState(const FSamplerStateInitializerRHI& Initializer, FVulkanDevice& InDevice) :
Sampler(VK_NULL_HANDLE),
Device(InDevice)
{
VkSamplerCreateInfo SamplerInfo;
FMemory::Memzero(SamplerInfo);
SamplerInfo.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
SamplerInfo.magFilter = TranslateMagFilterMode(Initializer.Filter);
SamplerInfo.minFilter = TranslateMinFilterMode(Initializer.Filter);
SamplerInfo.mipmapMode = TranslateMipFilterMode(Initializer.Filter);
SamplerInfo.addressModeU = TranslateWrapMode(Initializer.AddressU);
SamplerInfo.addressModeV = TranslateWrapMode(Initializer.AddressV);
SamplerInfo.addressModeW = TranslateWrapMode(Initializer.AddressW);
SamplerInfo.mipLodBias = Initializer.MipBias;
SamplerInfo.maxAnisotropy = GetMaxAnisotropy(Initializer.Filter, Initializer.MaxAnisotropy);
SamplerInfo.anisotropyEnable = SamplerInfo.maxAnisotropy > 1;
// FPlatformMisc::LowLevelOutputDebugStringf(TEXT("Using LOD Group %d / %d, MaxAniso = %f \n"), (int32)Initializer.Filter, Initializer.MaxAnisotropy, SamplerInfo.maxAnisotropy);
SamplerInfo.compareOp = TranslateSamplerCompareFunction(Initializer.SamplerComparisonFunction);
SamplerInfo.minLod = Initializer.MinMipLevel;
SamplerInfo.maxLod = Initializer.MaxMipLevel;
SamplerInfo.borderColor = Initializer.BorderColor == 0 ? VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK : VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
VERIFYVULKANRESULT(VulkanRHI::vkCreateSampler(Device.GetInstanceHandle(), &SamplerInfo, nullptr, &Sampler));
}
FSamplerStateRHIRef FD3D11DynamicRHI::RHICreateSamplerState(const FSamplerStateInitializerRHI& Initializer)
{
D3D11_SAMPLER_DESC SamplerDesc;
FMemory::Memzero(&SamplerDesc,sizeof(D3D11_SAMPLER_DESC));
int32 MaxAnisotropyCVar = GetCachedScalabilityCVars().MaxAnisotropy;
SamplerDesc.AddressU = TranslateAddressMode(Initializer.AddressU);
SamplerDesc.AddressV = TranslateAddressMode(Initializer.AddressV);
SamplerDesc.AddressW = TranslateAddressMode(Initializer.AddressW);
SamplerDesc.MipLODBias = Initializer.MipBias;
SamplerDesc.MaxAnisotropy = FMath::Clamp(Initializer.MaxAnisotropy > 0 ? Initializer.MaxAnisotropy : MaxAnisotropyCVar,1,16);
SamplerDesc.MinLOD = Initializer.MinMipLevel;
SamplerDesc.MaxLOD = Initializer.MaxMipLevel;
// Determine whether we should use one of the comparison modes
const bool bComparisonEnabled = Initializer.SamplerComparisonFunction != SCF_Never;
switch(Initializer.Filter)
{
case SF_AnisotropicLinear:
case SF_AnisotropicPoint:
if (SamplerDesc.MaxAnisotropy == 1)
{
SamplerDesc.Filter = bComparisonEnabled ? D3D11_FILTER_COMPARISON_MIN_MAG_MIP_LINEAR : D3D11_FILTER_MIN_MAG_MIP_LINEAR;
}
else
{
// D3D11 doesn't allow using point filtering for mip filter when using anisotropic filtering
SamplerDesc.Filter = bComparisonEnabled ? D3D11_FILTER_COMPARISON_ANISOTROPIC : D3D11_FILTER_ANISOTROPIC;
}
break;
case SF_Trilinear:
SamplerDesc.Filter = bComparisonEnabled ? D3D11_FILTER_COMPARISON_MIN_MAG_MIP_LINEAR : D3D11_FILTER_MIN_MAG_MIP_LINEAR;
break;
case SF_Bilinear:
SamplerDesc.Filter = bComparisonEnabled ? D3D11_FILTER_COMPARISON_MIN_MAG_LINEAR_MIP_POINT : D3D11_FILTER_MIN_MAG_LINEAR_MIP_POINT;
break;
case SF_Point:
SamplerDesc.Filter = bComparisonEnabled ? D3D11_FILTER_COMPARISON_MIN_MAG_MIP_POINT : D3D11_FILTER_MIN_MAG_MIP_POINT;
break;
}
const FLinearColor LinearBorderColor = FColor(Initializer.BorderColor);
SamplerDesc.BorderColor[0] = LinearBorderColor.R;
SamplerDesc.BorderColor[1] = LinearBorderColor.G;
SamplerDesc.BorderColor[2] = LinearBorderColor.B;
SamplerDesc.BorderColor[3] = LinearBorderColor.A;
SamplerDesc.ComparisonFunc = TranslateSamplerCompareFunction(Initializer.SamplerComparisonFunction);
#if LOCK_GSamplerStateCache
QUICK_SCOPE_CYCLE_COUNTER(FD3D11DynamicRHI_RHICreateSamplerState_LockAndCreate);
FScopeLock Lock(&GSamplerStateCacheLock);
#endif
// D3D11 will return the same pointer if the particular state description was already created
TRefCountPtr<ID3D11SamplerState> SamplerStateHandle;
VERIFYD3D11RESULT(Direct3DDevice->CreateSamplerState(&SamplerDesc, SamplerStateHandle.GetInitReference()));
FD3D11SamplerState** Found = GSamplerStateCache.Find(SamplerStateHandle);
if (Found)
{
return *Found;
}
FD3D11SamplerState* SamplerState = new FD3D11SamplerState;
SamplerState->Resource = SamplerStateHandle;
// Manually add reference as we control the creation/destructions
SamplerState->AddRef();
GSamplerStateCache.Add(SamplerStateHandle.GetReference(), SamplerState);
return SamplerState;
}
