/// <inheritdoc cref="Draw(GraphicsPrimitive)" />
public void Draw(D3D12GraphicsPrimitive primitive)
{
ThrowIfNull(primitive, nameof(primitive));
var commandList = D3D12GraphicsCommandList;
var pipeline = primitive.Pipeline;
ref readonly var vertexBufferView = ref primitive.VertexBufferView;
/// <inheritdoc cref="Draw(GraphicsPrimitive)" />
public void Draw(D3D12GraphicsPrimitive graphicsPrimitive)
{
ThrowIfNull(graphicsPrimitive, nameof(graphicsPrimitive));
var graphicsCommandList = D3D12GraphicsCommandList;
var graphicsPipeline = graphicsPrimitive.D3D12GraphicsPipeline;
var vertexBuffer = graphicsPrimitive.D3D12VertexBuffer;
graphicsCommandList->SetGraphicsRootSignature(graphicsPipeline.D3D12Signature.D3D12RootSignature);
graphicsCommandList->SetPipelineState(graphicsPipeline.D3D12PipelineState);
var vertexBufferView = new D3D12_VERTEX_BUFFER_VIEW {
BufferLocation = vertexBuffer.D3D12Resource->GetGPUVirtualAddress(),
StrideInBytes = (uint)vertexBuffer.Stride,
SizeInBytes = (uint)vertexBuffer.Size,
};
graphicsCommandList->IASetVertexBuffers(StartSlot: 0, NumViews: 1, &vertexBufferView);
var constantBuffers = graphicsPrimitive.ConstantBuffers;
var constantBuffersLength = constantBuffers.Length;
for (var index = 0; index < constantBuffersLength; index++)
{
var constantBuffer = (D3D12GraphicsBuffer)constantBuffers[index];
graphicsCommandList->SetGraphicsRootConstantBufferView(unchecked ((uint)index), constantBuffer.D3D12Resource->GetGPUVirtualAddress());
}
var indexBuffer = graphicsPrimitive.D3D12IndexBuffer;
if (indexBuffer != null)
{
var indexBufferStride = indexBuffer.Stride;
var indexFormat = DXGI_FORMAT_R16_UINT;
if (indexBufferStride != 2)
{
Assert(indexBufferStride == 4, "Index Buffer has an unsupported stride.");
indexFormat = DXGI_FORMAT_R32_UINT;
}
var indexBufferView = new D3D12_INDEX_BUFFER_VIEW {
BufferLocation = indexBuffer.D3D12Resource->GetGPUVirtualAddress(),
SizeInBytes = (uint)indexBuffer.Size,
Format = indexFormat,
};
graphicsCommandList->IASetIndexBuffer(&indexBufferView);
graphicsCommandList->DrawIndexedInstanced(IndexCountPerInstance: (uint)(indexBuffer.Size / indexBufferStride), InstanceCount: 1, StartIndexLocation: 0, BaseVertexLocation: 0, StartInstanceLocation: 0);
}
else
{
graphicsCommandList->DrawInstanced(VertexCountPerInstance: (uint)(vertexBuffer.Size / vertexBuffer.Stride), InstanceCount: 1, StartVertexLocation: 0, StartInstanceLocation: 0);
}
}