private unsafe void CreateAssets()
{
ID3D12Device *d3dDevice = _deviceResources.D3DDevice;
Guid iid;
{
iid = D3D12.IID_ID3D12GraphicsCommandList;
ID3D12GraphicsCommandList *commandList;
ThrowIfFailed(d3dDevice->CreateCommandList(
0,
D3D12_COMMAND_LIST_TYPE.D3D12_COMMAND_LIST_TYPE_DIRECT,
_deviceResources.CommandAllocator,
_pipelineState.Ptr,
&iid,
(void **)&commandList));
_commandList = commandList;
DX.NameD3D12Object(_commandList.Ptr, nameof(_commandList));
}
// Cube vertices. Each vertex has a position and a color.
const uint vertexPositionColorCount = 8;
VertexPositionColor *cubeVertices = stackalloc VertexPositionColor[(int)vertexPositionColorCount]
{
new VertexPositionColor {
pos = new Vector3(-0.5f, -0.5f, -0.5f), color = new Vector3(0.0f, 0.0f, 0.0f)
},
new VertexPositionColor {
pos = new Vector3(-0.5f, -0.5f, 0.5f), color = new Vector3(0.0f, 0.0f, 1.0f)
},
new VertexPositionColor {
pos = new Vector3(-0.5f, 0.5f, -0.5f), color = new Vector3(0.0f, 1.0f, 0.0f)
},
new VertexPositionColor {
pos = new Vector3(-0.5f, 0.5f, 0.5f), color = new Vector3(0.0f, 1.0f, 1.0f)
},
new VertexPositionColor {
pos = new Vector3(0.5f, -0.5f, -0.5f), color = new Vector3(1.0f, 0.0f, 0.0f)
},
new VertexPositionColor {
pos = new Vector3(0.5f, -0.5f, 0.5f), color = new Vector3(1.0f, 0.0f, 1.0f)
},
new VertexPositionColor {
pos = new Vector3(0.5f, 0.5f, -0.5f), color = new Vector3(1.0f, 1.0f, 0.0f)
},
new VertexPositionColor {
pos = new Vector3(0.5f, 0.5f, 0.5f), color = new Vector3(1.0f, 1.0f, 1.0f)
}
};
Debug.Assert(sizeof(VertexPositionColor) == Marshal.SizeOf <VertexPositionColor>());
uint vertexBufferSize = (uint)sizeof(VertexPositionColor) * vertexPositionColorCount;
using ComPtr <ID3D12Resource> vertexBufferUpload = default;
D3D12_HEAP_PROPERTIES defaultHeapProperties =
CD3DX12_HEAP_PROPERTIES.Create(D3D12_HEAP_TYPE.D3D12_HEAP_TYPE_DEFAULT);
D3D12_RESOURCE_DESC vertexBufferDesc = CD3DX12_RESOURCE_DESC.Buffer(vertexBufferSize);
{
iid = D3D12.IID_ID3D12Resource;
ID3D12Resource *vertexBuffer;
ThrowIfFailed(d3dDevice->CreateCommittedResource(
&defaultHeapProperties,
D3D12_HEAP_FLAGS.D3D12_HEAP_FLAG_NONE,
&vertexBufferDesc,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_COPY_DEST,
null,
&iid,
(void **)&vertexBuffer));
_vertexBuffer = vertexBuffer;
}
iid = D3D12.IID_ID3D12Resource;
D3D12_HEAP_PROPERTIES uploadHeapProperties =
CD3DX12_HEAP_PROPERTIES.Create(D3D12_HEAP_TYPE.D3D12_HEAP_TYPE_UPLOAD);
ThrowIfFailed(d3dDevice->CreateCommittedResource(
&uploadHeapProperties,
D3D12_HEAP_FLAGS.D3D12_HEAP_FLAG_NONE,
&vertexBufferDesc,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_GENERIC_READ,
null,
&iid,
(void **)vertexBufferUpload.GetAddressOf()));
DX.NameD3D12Object(_vertexBuffer.Ptr, nameof(_vertexBuffer));
{
D3D12_SUBRESOURCE_DATA vertexData;
vertexData.pData = (byte *)cubeVertices;
vertexData.RowPitch = (IntPtr)vertexBufferSize;
vertexData.SlicePitch = vertexData.RowPitch;
Functions.UpdateSubresources(
_commandList.Ptr,
_vertexBuffer.Ptr,
vertexBufferUpload.Ptr,
0, 0, 1,
&vertexData);
D3D12_RESOURCE_BARRIER vertexBufferResourceBarrier =
CD3DX12_RESOURCE_BARRIER.Transition(_vertexBuffer.Ptr,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_COPY_DEST,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER);
_commandList.Ptr->ResourceBarrier(1, &vertexBufferResourceBarrier);
}
const int cubeIndicesCount = 36;
ushort * cubeIndices = stackalloc ushort[cubeIndicesCount]
{
0,
2,
1, // -x
1,
2,
3,
4,
5,
6, // +x
5,
7,
6,
0,
1,
5, // -y
0,
5,
4,
2,
6,
7, // +y
2,
7,
3,
0,
4,
6, // -z
0,
6,
2,
1,
3,
7, // +z
1,
7,
5,
};
const uint indexBufferSize = sizeof(ushort) * cubeIndicesCount;
using var indexBufferUpload = new ComPtr <ID3D12Resource>();
D3D12_RESOURCE_DESC indexBufferDesc = CD3DX12_RESOURCE_DESC.Buffer(indexBufferSize);
{
iid = D3D12.IID_ID3D12Resource;
ID3D12Resource *indexBuffer;
ThrowIfFailed(d3dDevice->CreateCommittedResource(
&defaultHeapProperties,
D3D12_HEAP_FLAGS.D3D12_HEAP_FLAG_NONE,
&indexBufferDesc,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_COPY_DEST,
null,
&iid,
(void **)&indexBuffer));
_indexBuffer = indexBuffer;
}
iid = D3D12.IID_ID3D12Resource;
ThrowIfFailed(d3dDevice->CreateCommittedResource(
&uploadHeapProperties,
D3D12_HEAP_FLAGS.D3D12_HEAP_FLAG_NONE,
&indexBufferDesc,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_GENERIC_READ,
null,
&iid,
(void **)indexBufferUpload.GetAddressOf()));
DX.NameD3D12Object(_indexBuffer.Ptr, nameof(_indexBuffer));
{
D3D12_SUBRESOURCE_DATA indexData;
indexData.pData = (byte *)cubeIndices;
indexData.RowPitch = (IntPtr)indexBufferSize;
indexData.SlicePitch = indexData.RowPitch;
Functions.UpdateSubresources(
_commandList.Ptr,
_indexBuffer.Ptr,
indexBufferUpload.Ptr,
0, 0, 1,
&indexData);
D3D12_RESOURCE_BARRIER indexBufferResourceBarrier =
CD3DX12_RESOURCE_BARRIER.Transition(_indexBuffer.Ptr,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_COPY_DEST,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_INDEX_BUFFER);
_commandList.Ptr->ResourceBarrier(1, &indexBufferResourceBarrier);
}
{
D3D12_DESCRIPTOR_HEAP_DESC heapDesc;
heapDesc.NumDescriptors = DeviceResources.FrameCount;
heapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE.D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
heapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAGS.D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
{
ID3D12DescriptorHeap *cbvHeap;
iid = D3D12.IID_ID3D12DescriptorHeap;
ThrowIfFailed(d3dDevice->CreateDescriptorHeap(&heapDesc, &iid, (void **)&cbvHeap));
_cbvHeap = cbvHeap;
DX.NameD3D12Object(_cbvHeap.Ptr, nameof(_cbvHeap));
}
}
D3D12_RESOURCE_DESC constantBufferDesc = CD3DX12_RESOURCE_DESC.Buffer(
DeviceResources.FrameCount * AlignedConstantBufferSize);
{
iid = D3D12.IID_ID3D12Resource;
ID3D12Resource *constantBuffer;
ThrowIfFailed(d3dDevice->CreateCommittedResource(
&uploadHeapProperties,
D3D12_HEAP_FLAGS.D3D12_HEAP_FLAG_NONE,
&constantBufferDesc,
D3D12_RESOURCE_STATES.D3D12_RESOURCE_STATE_GENERIC_READ,
null,
&iid,
(void **)&constantBuffer));
_constantBuffer = constantBuffer;
DX.NameD3D12Object(_constantBuffer.Ptr, nameof(_constantBuffer));
}
D3D12_GPU_VIRTUAL_ADDRESS cbvGpuAddress = _constantBuffer.Ptr->GetGPUVirtualAddress();
D3D12_CPU_DESCRIPTOR_HANDLE cbvCpuHandle = _cbvHeap.Ptr->GetCPUDescriptorHandleForHeapStart();
_cbvDescriptorSize =
d3dDevice->GetDescriptorHandleIncrementSize(
D3D12_DESCRIPTOR_HEAP_TYPE.D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
for (var i = 0; i < DeviceResources.FrameCount; i++)
{
D3D12_CONSTANT_BUFFER_VIEW_DESC desc;
desc.BufferLocation = cbvGpuAddress;
desc.SizeInBytes = AlignedConstantBufferSize;
d3dDevice->CreateConstantBufferView(&desc, cbvCpuHandle);
cbvGpuAddress += desc.SizeInBytes;
cbvCpuHandle.Offset((int)_cbvDescriptorSize);
}
D3D12_RANGE readRange = CD3DX12_RANGE.Create((UIntPtr)0, (UIntPtr)0);
fixed(byte **p = &_mappedConstantBuffer)
{
ThrowIfFailed(_constantBuffer.Ptr->Map(0, &readRange, (void **)p));
Unsafe.InitBlockUnaligned(_mappedConstantBuffer, 0, DeviceResources.FrameCount * AlignedConstantBufferSize);
}
ThrowIfFailed(_commandList.Ptr->Close());
const int ppCommandListCount = 1;
ID3D12CommandList **ppCommandLists = stackalloc ID3D12CommandList *[ppCommandListCount]
{
(ID3D12CommandList *)_commandList.Ptr
};
_deviceResources.CommandQueue->ExecuteCommandLists(ppCommandListCount, ppCommandLists);
_vertexBufferView.BufferLocation = _vertexBuffer.Ptr->GetGPUVirtualAddress();
_vertexBufferView.StrideInBytes = (uint)sizeof(VertexPositionColor);
_vertexBufferView.SizeInBytes = vertexBufferSize;
_indexBufferView.BufferLocation = _indexBuffer.Ptr->GetGPUVirtualAddress();
_indexBufferView.SizeInBytes = indexBufferSize;
_indexBufferView.Format = DXGI_FORMAT.DXGI_FORMAT_R16_UINT;
_deviceResources.WaitForGpu();
}
#endregion
}
}
