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/* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited. */
#include "NvCoDx12DescriptorHeap.h"
namespace nvidia {
namespace Common {
Dx12DescriptorHeap::Dx12DescriptorHeap():
m_size(0),
m_currentIndex(0),
m_descriptorSize(0)
{
}
int Dx12DescriptorHeap::init(ID3D12Device* device, int size, D3D12_DESCRIPTOR_HEAP_TYPE type, D3D12_DESCRIPTOR_HEAP_FLAGS flags)
{
D3D12_DESCRIPTOR_HEAP_DESC srvHeapDesc = {};
srvHeapDesc.NumDescriptors = size;
srvHeapDesc.Flags = flags;
srvHeapDesc.Type = type;
NV_RETURN_ON_FAIL(device->CreateDescriptorHeap(&srvHeapDesc, IID_PPV_ARGS(&m_heap)));
m_descriptorSize = device->GetDescriptorHandleIncrementSize(type);
m_size = size;
return NV_OK;
}
int Dx12DescriptorHeap::init(ID3D12Device* device, const D3D12_CPU_DESCRIPTOR_HANDLE* handles, int numHandles, D3D12_DESCRIPTOR_HEAP_TYPE type, D3D12_DESCRIPTOR_HEAP_FLAGS flags)
{
NV_RETURN_ON_FAIL(init(device, numHandles, type, flags));
D3D12_CPU_DESCRIPTOR_HANDLE dst = m_heap->GetCPUDescriptorHandleForHeapStart();
// Copy them all
for (int i = 0; i < numHandles; i++, dst.ptr += m_descriptorSize)
{
D3D12_CPU_DESCRIPTOR_HANDLE src = handles[i];
if (src.ptr != 0)
{
device->CopyDescriptorsSimple(1, dst, src, type);
}
}
return NV_OK;
}
} // namespace Common
} // namespace nvidia
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