internal GraphicsRenderTarget(GraphicsSwapchain swapchain, int index) : base(swapchain)
{
_index = index;
_d3d12RtvDescriptorHandle = GetD3D12RtvDescriptorHandle();
var d3d12RtvResource = CreateD3D12RtvResource(out _d3d12RtvResourceVersion);
_d3d12RtvResource.Attach(d3d12RtvResource);
ID3D12Resource *CreateD3D12RtvResource(out uint d3d12RtvResourceVersion)
{
var d3d12RenderTargetViewDesc = new D3D12_RENDER_TARGET_VIEW_DESC {
Format = swapchain.RenderTargetFormat.AsDxgiFormat(),
ViewDimension = D3D12_RTV_DIMENSION_TEXTURE2D,
Texture2D = new D3D12_TEX2D_RTV()
};
ID3D12Resource *d3d12RtvResource;
ThrowExternalExceptionIfFailed(swapchain.DxgiSwapchain->GetBuffer((uint)_index, __uuidof <ID3D12Resource>(), (void **)&d3d12RtvResource));
swapchain.Device.D3D12Device->CreateRenderTargetView(d3d12RtvResource, &d3d12RenderTargetViewDesc, _d3d12RtvDescriptorHandle);
return(GetLatestD3D12Resource(d3d12RtvResource, out d3d12RtvResourceVersion));
}
D3D12_CPU_DESCRIPTOR_HANDLE GetD3D12RtvDescriptorHandle()
{
var d3d12RtvDescriptorHandleIncrementSize = Device.D3D12RtvDescriptorSize;
var d3d12RtvDescriptorHandleForHeapStart = Swapchain.D3D12RtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
D3D12_CPU_DESCRIPTOR_HANDLE.InitOffsetted(out var d3d12RtvDescriptorHandle, d3d12RtvDescriptorHandleForHeapStart, _index, d3d12RtvDescriptorHandleIncrementSize);
return(d3d12RtvDescriptorHandle);
}
}
private ID3D12Resource *[] CreateRenderTargets()
{
var renderTargets = new ID3D12Resource *[_graphicsSurface.BufferCount];
var iid = IID_ID3D12Resource;
var renderTargetDescriptorSize = Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
var renderTargetHandle = RenderTargetsHeap->GetCPUDescriptorHandleForHeapStart();
var renderTargetViewDesc = new D3D12_RENDER_TARGET_VIEW_DESC {
Format = DXGI_FORMAT_R8G8B8A8_UNORM_SRGB,
ViewDimension = D3D12_RTV_DIMENSION_TEXTURE2D,
Anonymous = new D3D12_RENDER_TARGET_VIEW_DESC._Anonymous_e__Union {
Texture2D = new D3D12_TEX2D_RTV {
MipSlice = 0,
PlaneSlice = 0,
},
},
};
for (var i = 0; i < renderTargets.Length; i++)
{
ID3D12Resource *renderTarget;
ThrowExternalExceptionIfFailed(nameof(IDXGISwapChain.GetBuffer), SwapChain->GetBuffer((uint)i, &iid, (void **)&renderTarget));
renderTargets[i] = renderTarget;
Device->CreateRenderTargetView(renderTarget, &renderTargetViewDesc, renderTargetHandle);
_ = renderTargetHandle.Offset((int)renderTargetDescriptorSize);
}
return(renderTargets);
}
private D3D12_CPU_DESCRIPTOR_HANDLE CreateD3D12RenderTargetDescriptor()
{
_state.ThrowIfDisposedOrDisposing();
D3D12_CPU_DESCRIPTOR_HANDLE renderTargetViewHandle;
var graphicsDevice = D3D12GraphicsDevice;
var d3d12Device = graphicsDevice.D3D12Device;
var renderTargetViewDesc = new D3D12_RENDER_TARGET_VIEW_DESC {
Format = graphicsDevice.DxgiSwapChainFormat,
ViewDimension = D3D12_RTV_DIMENSION_TEXTURE2D,
Anonymous = new D3D12_RENDER_TARGET_VIEW_DESC._Anonymous_e__Union {
Texture2D = new D3D12_TEX2D_RTV(),
},
};
var renderTargetDescriptorIncrementSize = d3d12Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
renderTargetViewHandle = graphicsDevice.D3D12RenderTargetDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
_ = renderTargetViewHandle.Offset(Index, renderTargetDescriptorIncrementSize);
d3d12Device->CreateRenderTargetView(D3D12RenderTargetResource, &renderTargetViewDesc, renderTargetViewHandle);
return(renderTargetViewHandle);
}
public virtual void CreateRenderTargetView(
ID3D12Resource pResource,
ref D3D12_RENDER_TARGET_VIEW_DESC pDesc,
D3D12_CPU_DESCRIPTOR_HANDLE DestDescriptor
)
{
var fp = GetFunctionPointer(20);
if (m_CreateRenderTargetViewFunc == null)
{
m_CreateRenderTargetViewFunc = (CreateRenderTargetViewFunc)Marshal.GetDelegateForFunctionPointer(fp, typeof(CreateRenderTargetViewFunc));
}
m_CreateRenderTargetViewFunc(m_ptr, pResource != null ? pResource.Ptr : IntPtr.Zero, ref pDesc, DestDescriptor);
}
