1 files changed, 39 insertions, 5 deletions
diff --git a/tools/gfx/metal/metal-sampler.cpp b/tools/gfx/metal/metal-sampler.cpp
index cd94def37..561b93ea2 100644
--- a/tools/gfx/metal/metal-sampler.cpp
+++ b/tools/gfx/metal/metal-sampler.cpp
@@ -1,5 +1,6 @@
 // metal-sampler.cpp
 #include "metal-sampler.h"
+#include "metal-util.h"
 
 namespace gfx
 {
@@ -9,17 +10,50 @@ using namespace Slang;
 namespace metal
 {
 
-SamplerStateImpl::SamplerStateImpl(DeviceImpl* device)
-    : m_device(device)
-{}
-
 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)
 {
-    return SLANG_E_NOT_IMPLEMENTED;
+    outHandle->api = InteropHandleAPI::Metal;
+    outHandle->handleValue = reinterpret_cast<intptr_t>(m_samplerState.get());
+    return SLANG_OK;
 }
 
 } // namespace metal