#include "XCEngine/RHI/D3D12/D3D12ConstantBufferView.h"

namespace XCEngine {
namespace RHI {

D3D12ConstantBufferView::D3D12ConstantBufferView()
    : m_handle({0})
    , m_resource(nullptr) {
}

D3D12ConstantBufferView::~D3D12ConstantBufferView() {
    Shutdown();
}

void D3D12ConstantBufferView::Initialize(ID3D12Device* device, ID3D12Resource* buffer, const D3D12_CONSTANT_BUFFER_VIEW_DESC* desc) {
    m_resource = buffer;
    m_handle = {};

    if (desc) {
        device->CreateConstantBufferView(desc, m_handle);
    } else {
        D3D12_CONSTANT_BUFFER_VIEW_DESC cbvDesc = {};
        cbvDesc.BufferLocation = buffer->GetGPUVirtualAddress();
        cbvDesc.SizeInBytes = static_cast<UINT>(buffer->GetDesc().Width);
        device->CreateConstantBufferView(&cbvDesc, m_handle);
    }
}

void D3D12ConstantBufferView::Shutdown() {
    m_handle = {};
    m_resource = nullptr;
}

} // namespace RHI
} // namespace XCEngine