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// metal-sampler.cpp
#include "metal-sampler.h"
#include "metal-util.h"
namespace gfx
{
using namespace Slang;
namespace metal
{
SamplerStateImpl::~SamplerStateImpl() {}
Result SamplerStateImpl::init(DeviceImpl* device, const ISamplerState::Desc& desc)
{
m_device = device;
NS::SharedPtr<MTL::SamplerDescriptor> samplerDesc =
NS::TransferPtr(MTL::SamplerDescriptor::alloc()->init());
samplerDesc->setMinFilter(MetalUtil::translateSamplerMinMagFilter(desc.minFilter));
samplerDesc->setMagFilter(MetalUtil::translateSamplerMinMagFilter(desc.magFilter));
samplerDesc->setMipFilter(MetalUtil::translateSamplerMipFilter(desc.mipFilter));
samplerDesc->setSAddressMode(MetalUtil::translateSamplerAddressMode(desc.addressU));
samplerDesc->setTAddressMode(MetalUtil::translateSamplerAddressMode(desc.addressV));
samplerDesc->setRAddressMode(MetalUtil::translateSamplerAddressMode(desc.addressW));
samplerDesc->setMaxAnisotropy(Math::Clamp(desc.maxAnisotropy, 1u, 16u));
// TODO: support translation of border color...
MTL::SamplerBorderColor borderColor = MTL::SamplerBorderColorOpaqueBlack;
samplerDesc->setBorderColor(borderColor);
samplerDesc->setNormalizedCoordinates(true);
samplerDesc->setCompareFunction(MetalUtil::translateCompareFunction(desc.comparisonFunc));
samplerDesc->setLodMinClamp(Math::Clamp(desc.minLOD, 0.f, 1000.f));
samplerDesc->setLodMaxClamp(Math::Clamp(desc.maxLOD, samplerDesc->lodMinClamp(), 1000.f));
samplerDesc->setSupportArgumentBuffers(true);
// TODO: no support for reduction op
m_samplerState = NS::TransferPtr(m_device->m_device->newSamplerState(samplerDesc.get()));
return m_samplerState ? SLANG_OK : SLANG_FAIL;
}
Result SamplerStateImpl::getNativeHandle(InteropHandle* outHandle)
{
outHandle->api = InteropHandleAPI::Metal;
outHandle->handleValue = reinterpret_cast<intptr_t>(m_samplerState.get());
return SLANG_OK;
}
} // namespace metal
} // namespace gfx
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