[gfx] specify resource view buffer range in bytes (#4149)

* refactor gfx buffer range to use byte range

* create buffer view with zero struct stride for ClearUnorderedAccessViewUint/Float

* create buffer descriptors on demand

* avoid copying gfx.dll

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 10 insertions, 6 deletions

diff --git a/tools/gfx/d3d12/d3d12-shader-object.cpp b/tools/gfx/d3d12/d3d12-shader-object.cpp
index 3d38df5ab..beb88b636 100644
--- a/tools/gfx/d3d12/d3d12-shader-object.cpp
+++ b/tools/gfx/d3d12/d3d12-shader-object.cpp
@@ -965,13 +965,17 @@ Result ShaderObjectImpl::setResource(ShaderOffset const& offset, IResourceView*
     }
 
     auto descriptorSlotIndex = bindingRange.baseIndex + (int32_t)offset.bindingArrayIndex;
-    D3D12Descriptor srcDescriptor = {};
+    D3D12Descriptor srcDescriptor = internalResourceView->m_descriptor;
 
-    SLANG_RETURN_ON_FAIL(internalResourceView->getBufferDescriptorForBinding(
-        static_cast<DeviceImpl*>(m_device.get()),
-        resourceViewImpl,
-        bindingRange.bufferElementStride,
-        srcDescriptor));
+    // Buffer descriptors are created on demand.
+    if (!srcDescriptor.cpuHandle.ptr)
+    {
+        SLANG_RETURN_ON_FAIL(internalResourceView->getBufferDescriptorForBinding(
+            static_cast<DeviceImpl*>(m_device.get()),
+            resourceViewImpl,
+            bindingRange.bufferElementStride,
+            srcDescriptor));
+    }
 
     if (srcDescriptor.cpuHandle.ptr)
     {