Method Initialize

SampleFramework12/v1.02/Graphics/GraphicsTypes.cpp:230–316

}

void Buffer::Initialize(uint64 size, uint64 alignment, bool32 dynamic, bool32 cpuAccessible,
                        bool32 allowUAV, const void* initData, D3D12_RESOURCE_STATES initialState,
                        ID3D12Heap* heap, uint64 heapOffset, const wchar* name)
{
    Assert_(size > 0);
    Assert_(alignment > 0);

    Size = AlignTo(size, alignment);
    Alignment = alignment;
    Dynamic = dynamic;
    CPUAccessible = cpuAccessible;
    CurrBuffer = 0;
    CPUAddress = nullptr;
    GPUAddress = 0;
    Heap = nullptr;
    HeapOffset = 0;
    CreateFrame = DX12::CurrentCPUFrame;

    Assert_(allowUAV == false || dynamic == false);
    Assert_(dynamic || cpuAccessible == false);

    D3D12_RESOURCE_DESC resourceDesc = { };
    resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
    resourceDesc.Width = dynamic ? Size * DX12::RenderLatency : Size;
    resourceDesc.Height = 1;
    resourceDesc.DepthOrArraySize = 1;
    resourceDesc.MipLevels = 1;
    resourceDesc.Format = DXGI_FORMAT_UNKNOWN;
    resourceDesc.Flags = allowUAV ? D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS : D3D12_RESOURCE_FLAG_NONE;
    resourceDesc.SampleDesc.Count = 1;
    resourceDesc.SampleDesc.Quality = 0;
    resourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
    resourceDesc.Alignment = 0;

    const D3D12_HEAP_PROPERTIES* heapProps = cpuAccessible ? DX12::GetUploadHeapProps() : DX12::GetDefaultHeapProps();
    D3D12_RESOURCE_STATES resourceState = initialState;
    if(cpuAccessible)
        resourceState = D3D12_RESOURCE_STATE_GENERIC_READ;
    else if(initData)
        resourceState = D3D12_RESOURCE_STATE_COMMON;

    if(heap)
    {
        Heap = heap;
        HeapOffset = heapOffset;
        DXCall(DX12::Device->CreatePlacedResource(heap, heapOffset, &resourceDesc, resourceState,
                                                    nullptr, IID_PPV_ARGS(&Resource)));
    }
    else
    {
        DXCall(DX12::Device->CreateCommittedResource(heapProps, D3D12_HEAP_FLAG_NONE, &resourceDesc,
                                                        resourceState, nullptr, IID_PPV_ARGS(&Resource)));
    }

    if(name)
        Resource->SetName(name);

    GPUAddress = Resource->GetGPUVirtualAddress();