119 lines
2.8 KiB
C++
119 lines
2.8 KiB
C++
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#ifndef Submesh_h__
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#define Submesh_h__
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#include <vector>
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#include "LEngine.h"
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#include "d3d11_types.h"
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#include <memory>
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#include "d3dx12.h"
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enum class MeshTopology {
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TriangleList,
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TriangleStrip,
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LineList,
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LineStrip
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};
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class Submesh {
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public:
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typedef uint32_t index_count_t;
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typedef uint32_t index_t;
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typedef std::vector<index_t> index_array_t;
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Submesh()
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:_indexCount(0)
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{
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}
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ID3D12ResourcePtr GetIndexBuffer() const{
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return _indexBuffer;
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}
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MeshTopology GetTopology() const{
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return _topology;
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}
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D3D12_INDEX_BUFFER_VIEW GetIndexBufferView()
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{
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return _indexBufferView;
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}
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void Set(index_array_t indices, MeshTopology topology) {
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_indexCount = indices.size();
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_topology = topology;
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_indexBuffer = nullptr;
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if (_indexCount == 0) {
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return;
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}
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D3D11_BUFFER_DESC desc = { 0 };
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D3D11_SUBRESOURCE_DATA data = { 0 };
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//index buffer
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desc.Usage = D3D11_USAGE_DEFAULT;
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desc.ByteWidth = sizeof(indices[0]) * indices.size();
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desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
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desc.CPUAccessFlags = 0;
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desc.MiscFlags = 0;
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data.pSysMem = &indices[0];
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data.SysMemPitch = 0;
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data.SysMemSlicePitch = 0;
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auto renderer = LEngine::Instance()->GetRenderer();
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auto device = renderer->GetDevice();
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auto cmdList = renderer->BeginCommandList();
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//create temporal upload resource
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ComPtr<ID3D12Resource> uploadBuffer;
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device->CreateCommittedResource(&CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_UPLOAD),
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D3D12_HEAP_FLAG_ALLOW_ALL_BUFFERS_AND_TEXTURES,
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&CD3DX12_RESOURCE_DESC::Buffer(desc.ByteWidth),
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D3D12_RESOURCE_STATE_GENERIC_READ, nullptr, IID_PPV_ARGS(&uploadBuffer));
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//upload data to temporal resource
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void* p;
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uploadBuffer->Map(0, nullptr, &p);
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memcpy(p, &indices[0], desc.ByteWidth);
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uploadBuffer->Unmap(0, nullptr);
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device->CreateCommittedResource(&CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_DEFAULT),
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D3D12_HEAP_FLAG_NONE,
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&CD3DX12_RESOURCE_DESC::Buffer(desc.ByteWidth),
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D3D12_RESOURCE_STATE_COPY_DEST,
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nullptr,
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IID_PPV_ARGS(&_indexBuffer));
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_indexBufferView.BufferLocation = _indexBuffer->GetGPUVirtualAddress();
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_indexBufferView.SizeInBytes = desc.ByteWidth;
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_indexBufferView.Format = DXGI_FORMAT_R32_UINT;
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cmdList->CopyBufferRegion(_indexBuffer.Get(), 0, uploadBuffer.Get(), 0, desc.ByteWidth);
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CD3DX12_RESOURCE_BARRIER barriers[1] = {
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CD3DX12_RESOURCE_BARRIER::Transition(_indexBuffer.Get(),
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D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_INDEX_BUFFER)
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};
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cmdList->ResourceBarrier(1, barriers);
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renderer->EndCommandList();
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renderer->WaitCommandsQueue();
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}
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index_count_t GetIndicesCount() const {
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return _indexCount;
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}
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private:
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index_count_t _indexCount;
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MeshTopology _topology;
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ID3D12ResourcePtr _indexBuffer;
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D3D12_INDEX_BUFFER_VIEW _indexBufferView;
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};
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typedef std::shared_ptr<Submesh> SubmeshPtr;
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#endif // Submesh_h__
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