#include <windows.h>
#include <d3d12.h>
#include <dxgi1_4.h>
#include <d3dcompiler.h>
#include <DirectXMath.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <algorithm>
#include <unordered_map>
#include <string>
#include <cstring>
#include "stbi/stb_image.h"
#include "XCEngine/RHI/Enums.h"
#include "XCEngine/RHI/D3D12/D3D12Enum.h"

using namespace XCEngine::RHI;

#pragma comment(lib,"d3d12.lib")
#pragma comment(lib,"dxgi.lib")
#pragma comment(lib,"d3dcompiler.lib")
#pragma comment(lib,"winmm.lib")

//=================================================================================
// D3D12 核心全局对象 (最小渲染所需)
//=================================================================================
ID3D12Device* gD3D12Device = nullptr;
ID3D12CommandQueue* gCommandQueue = nullptr;
IDXGISwapChain3* gSwapChain = nullptr;

// 渲染目标 (SwapChain的后台Buffer)
ID3D12Resource* gDSRT = nullptr;  // 深度模板缓冲
ID3D12Resource* gColorRTs[2];      // 颜色缓冲 (双缓冲)
int gCurrentRTIndex = 0;

// 描述符堆
ID3D12DescriptorHeap* gSwapChainRTVHeap = nullptr;  // RTV堆
ID3D12DescriptorHeap* gSwapChainDSVHeap = nullptr;  // DSV堆
UINT gRTVDescriptorSize = 0;
UINT gDSVDescriptorSize = 0;

// 命令相关
ID3D12CommandAllocator* gCommandAllocator = nullptr;
ID3D12GraphicsCommandList* gCommandList = nullptr;

// 同步对象
ID3D12Fence* gFence = nullptr;
HANDLE gFenceEvent = nullptr;
UINT64 gFenceValue = 0;

//=================================================================================
// 工具函数前向声明
//=================================================================================
D3D12_RESOURCE_BARRIER InitResourceBarrier(
	ID3D12Resource* inResource, D3D12_RESOURCE_STATES inPrevState,
	D3D12_RESOURCE_STATES inNextState);

ID3D12Resource* CreateBufferObject(ID3D12GraphicsCommandList* inCommandList,
	void* inData, int inDataLen, D3D12_RESOURCE_STATES inFinalResourceState);

//=================================================================================
// 工具函数
//=================================================================================
float srandom() {
	float number = float(rand()) / float(RAND_MAX);
	number *= 2.0f;
	number -= 1.0f;
	return number;
}

//=================================================================================
// 数据结构定义
//=================================================================================
struct StaticMeshComponentVertexData {
	float mPosition[4];
	float mTexcoord[4];
	float mNormal[4];
	float mTangent[4];
};

struct SubMesh {
	ID3D12Resource* mIBO;
	D3D12_INDEX_BUFFER_VIEW mIBView;
	int mIndexCount;
};

//=================================================================================
// 网格组件类 (StaticMeshComponent)
// 封装顶点缓冲(VBO)、索引缓冲(IBO)和渲染逻辑
//=================================================================================
class StaticMeshComponent {
public:
	ID3D12Resource* mVBO;
	D3D12_VERTEX_BUFFER_VIEW mVBOView;
	StaticMeshComponentVertexData* mVertexData;
	int mVertexCount;
	std::unordered_map<std::string, SubMesh*> mSubMeshes;

	void SetVertexCount(int inVertexCount) {
		mVertexCount = inVertexCount;
		mVertexData = new StaticMeshComponentVertexData[inVertexCount];
		memset(mVertexData, 0, sizeof(StaticMeshComponentVertexData) * inVertexCount);
	}
	void SetVertexPosition(int inIndex, float inX, float inY, float inZ, float inW = 1.0f) {
		mVertexData[inIndex].mPosition[0] = inX;
		mVertexData[inIndex].mPosition[1] = inY;
		mVertexData[inIndex].mPosition[2] = inZ;
		mVertexData[inIndex].mPosition[3] = inW;
	}
	void SetVertexTexcoord(int inIndex, float inX, float inY, float inZ, float inW = 1.0f) {
		mVertexData[inIndex].mTexcoord[0] = inX;
		mVertexData[inIndex].mTexcoord[1] = inY;
		mVertexData[inIndex].mTexcoord[2] = inZ;
		mVertexData[inIndex].mTexcoord[3] = inW;
	}
	void SetVertexNormal(int inIndex, float inX, float inY, float inZ, float inW = 1.0f) {
		mVertexData[inIndex].mNormal[0] = inX;
		mVertexData[inIndex].mNormal[1] = inY;
		mVertexData[inIndex].mNormal[2] = inZ;
		mVertexData[inIndex].mNormal[3] = inW;
	}
	void SetVertexTangent(int inIndex, float inX, float inY, float inZ, float inW = 1.0f) {
		mVertexData[inIndex].mTangent[0] = inX;
		mVertexData[inIndex].mTangent[1] = inY;
		mVertexData[inIndex].mTangent[2] = inZ;
		mVertexData[inIndex].mTangent[3] = inW;
	}
	void InitFromFile(ID3D12GraphicsCommandList* inCommandList, const char* inFilePath) {
		FILE* pFile = nullptr;
		errno_t err = fopen_s(&pFile, inFilePath, "rb");
		if (err == 0) {
			int temp = 0;
			fread(&temp, 4, 1, pFile);
			mVertexCount = temp;
			mVertexData = new StaticMeshComponentVertexData[mVertexCount];
			fread(mVertexData, 1, sizeof(StaticMeshComponentVertexData) * mVertexCount, pFile);
			mVBO = CreateBufferObject(inCommandList, mVertexData,
				sizeof(StaticMeshComponentVertexData) * mVertexCount,
				D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER);
			mVBOView.BufferLocation = mVBO->GetGPUVirtualAddress();
			mVBOView.SizeInBytes = sizeof(StaticMeshComponentVertexData) * mVertexCount;
			mVBOView.StrideInBytes = sizeof(StaticMeshComponentVertexData);

			while (!feof(pFile)) {
				fread(&temp, 4, 1, pFile);
				if (feof(pFile)) {
					break;
				}
				char name[256] = { 0 };
				fread(name, 1, temp, pFile);
				fread(&temp, 4, 1, pFile);
				SubMesh* submesh = new SubMesh;
				submesh->mIndexCount = temp;
				unsigned int* indexes = new unsigned int[temp];
				fread(indexes, 1, sizeof(unsigned int) * temp, pFile);
				submesh->mIBO = CreateBufferObject(inCommandList, indexes,
					sizeof(unsigned int) * temp,
					D3D12_RESOURCE_STATE_INDEX_BUFFER);

				submesh->mIBView.BufferLocation = submesh->mIBO->GetGPUVirtualAddress();
				submesh->mIBView.SizeInBytes = sizeof(unsigned int) * temp;
				submesh->mIBView.Format = DXGI_FORMAT_R32_UINT;
				mSubMeshes.insert(std::pair<std::string, SubMesh*>(name, submesh));
				delete[] indexes;
			}
			fclose(pFile);
		}
	}
	void Render(ID3D12GraphicsCommandList* inCommandList) {
		D3D12_VERTEX_BUFFER_VIEW vbos[] = {
			mVBOView
		};
		inCommandList->IASetVertexBuffers(0, 1, vbos);
		if (mSubMeshes.empty()) {
			inCommandList->DrawInstanced(mVertexCount, 1, 0, 0);
		}
		else {
			for (auto iter = mSubMeshes.begin();
				iter != mSubMeshes.end(); iter++) {
				inCommandList->IASetIndexBuffer(&iter->second->mIBView);
				inCommandList->DrawIndexedInstanced(iter->second->mIndexCount, 1, 0, 0, 0);
			}
		}
	}
};

//=================================================================================
// ResourceBarrier 工具函数
// 用于资源状态转换 (例如: PRESENT → RENDER_TARGET)
//=================================================================================
D3D12_RESOURCE_BARRIER InitResourceBarrier(
	ID3D12Resource* inResource, D3D12_RESOURCE_STATES inPrevState,
	D3D12_RESOURCE_STATES inNextState) {
	D3D12_RESOURCE_BARRIER d3d12ResourceBarrier;
	memset(&d3d12ResourceBarrier, 0, sizeof(d3d12ResourceBarrier));
	d3d12ResourceBarrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
	d3d12ResourceBarrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
	d3d12ResourceBarrier.Transition.pResource = inResource;
	d3d12ResourceBarrier.Transition.StateBefore = inPrevState;
	d3d12ResourceBarrier.Transition.StateAfter = inNextState;
	d3d12ResourceBarrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
	return d3d12ResourceBarrier;
}

//=================================================================================
// 根签名初始化 (RootSignature)
// 定义GPU资源绑定规则: CBV(常量缓冲) / SRV(着色器资源) / DescriptorTable
//=================================================================================
ID3D12RootSignature* InitRootSignature() {
	D3D12_ROOT_PARAMETER rootParameters[4];
	rootParameters[1].ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS;
	rootParameters[1].ShaderVisibility = ToD3D12(ShaderVisibility::Vertex);
	rootParameters[1].Constants.RegisterSpace = 0;
	rootParameters[1].Constants.ShaderRegister = 0;
	rootParameters[1].Constants.Num32BitValues = 4;

	rootParameters[0].ParameterType = D3D12_ROOT_PARAMETER_TYPE_CBV;
	rootParameters[0].ShaderVisibility = ToD3D12(ShaderVisibility::All);
	rootParameters[0].Descriptor.RegisterSpace = 0;
	rootParameters[0].Descriptor.ShaderRegister = 1;

	D3D12_DESCRIPTOR_RANGE descriptorRange[1];
	descriptorRange[0].RangeType = D3D12_DESCRIPTOR_RANGE_TYPE_SRV;
	descriptorRange[0].RegisterSpace = 0;
	descriptorRange[0].BaseShaderRegister = 0;
	descriptorRange[0].NumDescriptors = 1;
	descriptorRange[0].OffsetInDescriptorsFromTableStart = D3D12_DESCRIPTOR_RANGE_OFFSET_APPEND;

	rootParameters[2].ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE;
	rootParameters[2].ShaderVisibility = ToD3D12(ShaderVisibility::Pixel);
	rootParameters[2].DescriptorTable.pDescriptorRanges = descriptorRange;
	rootParameters[2].DescriptorTable.NumDescriptorRanges = _countof(descriptorRange);

	rootParameters[3].ParameterType = D3D12_ROOT_PARAMETER_TYPE_SRV;
	rootParameters[3].ShaderVisibility = ToD3D12(ShaderVisibility::All);
	rootParameters[3].Descriptor.RegisterSpace = 1;
	rootParameters[3].Descriptor.ShaderRegister = 0;

	D3D12_STATIC_SAMPLER_DESC samplerDesc[1];
	memset(samplerDesc, 0, sizeof(D3D12_STATIC_SAMPLER_DESC) * _countof(samplerDesc));
	samplerDesc[0].Filter = ToD3D12(FilterMode::Linear);
	samplerDesc[0].AddressU = ToD3D12(TextureAddressMode::Clamp);
	samplerDesc[0].AddressV = ToD3D12(TextureAddressMode::Clamp);
	samplerDesc[0].AddressW = ToD3D12(TextureAddressMode::Clamp);
	samplerDesc[0].BorderColor = ToD3D12(BorderColor::OpaqueBlack);
	samplerDesc[0].MaxLOD = D3D12_FLOAT32_MAX;
	samplerDesc[0].RegisterSpace = 0;
	samplerDesc[0].ShaderRegister = 0;
	samplerDesc[0].ShaderVisibility = ToD3D12(ShaderVisibility::Pixel);

	D3D12_ROOT_SIGNATURE_DESC rootSignatureDesc = {};
	rootSignatureDesc.NumParameters = _countof(rootParameters);
	rootSignatureDesc.pParameters = rootParameters;
	rootSignatureDesc.NumStaticSamplers = _countof(samplerDesc);
	rootSignatureDesc.pStaticSamplers = samplerDesc;
	rootSignatureDesc.Flags = D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT;

	ID3DBlob* signature;
	HRESULT hResult = D3D12SerializeRootSignature(&rootSignatureDesc, D3D_ROOT_SIGNATURE_VERSION_1, &signature, nullptr);
	ID3D12RootSignature* d3d12RootSignature;
	gD3D12Device->CreateRootSignature(
		0, signature->GetBufferPointer(), signature->GetBufferSize(),
		IID_PPV_ARGS(&d3d12RootSignature));

	return d3d12RootSignature;
}

//=================================================================================
// 着色器加载函数
// 从.hlsl文件编译着色器 (VS/GS/PS)
//=================================================================================
void CreateShaderFromFile(
	LPCTSTR inShaderFilePath,
	const char* inMainFunctionName,
	const char* inTarget,
	D3D12_SHADER_BYTECODE* inShader) {
	ID3DBlob* shaderBuffer = nullptr;
	ID3DBlob* errorBuffer = nullptr;
	HRESULT hResult = D3DCompileFromFile(inShaderFilePath, nullptr, nullptr,
		inMainFunctionName, inTarget, D3DCOMPILE_DEBUG | D3DCOMPILE_SKIP_OPTIMIZATION,
		0, &shaderBuffer, &errorBuffer);
	if (FAILED(hResult)) {
		char szLog[1024] = { 0 };
		strcpy_s(szLog, (char*)errorBuffer->GetBufferPointer());
		printf("CreateShaderFromFile error : [%s][%s]:[%s]\n", inMainFunctionName, inTarget, szLog);
		errorBuffer->Release();
		return;
	}
	inShader->pShaderBytecode = shaderBuffer->GetBufferPointer();
	inShader->BytecodeLength = shaderBuffer->GetBufferSize();
}

//=================================================================================
// 常量缓冲 (Constant Buffer) 创建与更新
// UPLOAD堆: CPU可写, GPU可读
//=================================================================================
ID3D12Resource* CreateConstantBufferObject(int inDataLen) {
	D3D12_HEAP_PROPERTIES d3dHeapProperties = {};
	d3dHeapProperties.Type = D3D12_HEAP_TYPE_UPLOAD;
	D3D12_RESOURCE_DESC d3d12ResourceDesc = {};
	d3d12ResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
	d3d12ResourceDesc.Alignment = 0;
	d3d12ResourceDesc.Width = inDataLen;
	d3d12ResourceDesc.Height = 1;
	d3d12ResourceDesc.DepthOrArraySize = 1;
	d3d12ResourceDesc.MipLevels = 1;
	d3d12ResourceDesc.Format = DXGI_FORMAT_UNKNOWN;
	d3d12ResourceDesc.SampleDesc.Count = 1;
	d3d12ResourceDesc.SampleDesc.Quality = 0;
	d3d12ResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
	d3d12ResourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;

	ID3D12Resource* bufferObject = nullptr;
	gD3D12Device->CreateCommittedResource(
		&d3dHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12ResourceDesc,
		D3D12_RESOURCE_STATE_GENERIC_READ,
		nullptr,
		IID_PPV_ARGS(&bufferObject)
	);
	return bufferObject;
}

//=================================================================================
// 更新常量缓冲数据
//=================================================================================
void UpdateConstantBuffer(ID3D12Resource* inCB, void* inData, int inDataLen) {
	D3D12_RANGE d3d12Range = { 0 };
	unsigned char* pBuffer = nullptr;
	inCB->Map(0, &d3d12Range, (void**)&pBuffer);
	memcpy(pBuffer, inData, inDataLen);
	inCB->Unmap(0, nullptr);
}

//=================================================================================
// GPU Buffer创建 (顶点/索引缓冲)
// DEFAULT堆 → 通过Upload堆中转数据 → 状态转换
//=================================================================================
ID3D12Resource* CreateBufferObject(ID3D12GraphicsCommandList* inCommandList,
	void* inData, int inDataLen, D3D12_RESOURCE_STATES inFinalResourceState) {
	D3D12_HEAP_PROPERTIES d3dHeapProperties = {};
	d3dHeapProperties.Type = D3D12_HEAP_TYPE_DEFAULT;
	D3D12_RESOURCE_DESC d3d12ResourceDesc = {};
	d3d12ResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
	d3d12ResourceDesc.Alignment = 0;
	d3d12ResourceDesc.Width = inDataLen;
	d3d12ResourceDesc.Height = 1;
	d3d12ResourceDesc.DepthOrArraySize = 1;
	d3d12ResourceDesc.MipLevels = 1;
	d3d12ResourceDesc.Format = DXGI_FORMAT_UNKNOWN;
	d3d12ResourceDesc.SampleDesc.Count = 1;
	d3d12ResourceDesc.SampleDesc.Quality = 0;
	d3d12ResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
	d3d12ResourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;

	ID3D12Resource* bufferObject = nullptr;
	gD3D12Device->CreateCommittedResource(
		&d3dHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12ResourceDesc,
		D3D12_RESOURCE_STATE_COPY_DEST,
		nullptr,
		IID_PPV_ARGS(&bufferObject)
	);
	d3d12ResourceDesc = bufferObject->GetDesc();
	UINT64 memorySizeUsed = 0;
	UINT64 rowSizeInBytes = 0;
	UINT rowUsed = 0;
	D3D12_PLACED_SUBRESOURCE_FOOTPRINT subresourceFootprint;
	gD3D12Device->GetCopyableFootprints(&d3d12ResourceDesc, 0, 1, 0,
		&subresourceFootprint, &rowUsed, &rowSizeInBytes, &memorySizeUsed);

	ID3D12Resource* tempBufferObject = nullptr;
	d3dHeapProperties = {};
	d3dHeapProperties.Type = D3D12_HEAP_TYPE_UPLOAD;
	gD3D12Device->CreateCommittedResource(
		&d3dHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12ResourceDesc,
		D3D12_RESOURCE_STATE_GENERIC_READ,
		nullptr,
		IID_PPV_ARGS(&tempBufferObject)
	);

	BYTE* pData;
	tempBufferObject->Map(0, nullptr, reinterpret_cast<void**>(&pData));
	BYTE* pDstTempBuffer = reinterpret_cast<BYTE*>(pData + subresourceFootprint.Offset);
	const BYTE* pSrcData = reinterpret_cast<BYTE*>(inData);
	for (UINT i = 0; i < rowUsed; i++) {
		memcpy(pDstTempBuffer + subresourceFootprint.Footprint.RowPitch * i, pSrcData + rowSizeInBytes * i, rowSizeInBytes);
	}
	tempBufferObject->Unmap(0, nullptr);
	inCommandList->CopyBufferRegion(bufferObject, 0, tempBufferObject, 0, subresourceFootprint.Footprint.Width);
	D3D12_RESOURCE_BARRIER barrier = InitResourceBarrier(bufferObject, D3D12_RESOURCE_STATE_COPY_DEST, inFinalResourceState);
	inCommandList->ResourceBarrier(1, &barrier);
	return bufferObject;
}

//=================================================================================
// 2D纹理创建
// DEFAULT堆 → 通过Upload堆中转数据 → CopyTextureRegion → 状态转换
//=================================================================================
ID3D12Resource* CreateTexture2D(ID3D12GraphicsCommandList* inCommandList,
	const void* inPixelData, int inDataSizeInBytes, int inWidth, int inHeight,
	DXGI_FORMAT inFormat) {
	D3D12_HEAP_PROPERTIES d3dHeapProperties = {};
	d3dHeapProperties.Type = D3D12_HEAP_TYPE_DEFAULT;

	D3D12_RESOURCE_DESC d3d12ResourceDesc = {};
	d3d12ResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
	d3d12ResourceDesc.Alignment = 0;
	d3d12ResourceDesc.Width = inWidth;
	d3d12ResourceDesc.Height = inHeight;
	d3d12ResourceDesc.DepthOrArraySize = 1;
	d3d12ResourceDesc.MipLevels = 1;
	d3d12ResourceDesc.Format = inFormat;
	d3d12ResourceDesc.SampleDesc.Count = 1;
	d3d12ResourceDesc.SampleDesc.Quality = 0;
	d3d12ResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
	d3d12ResourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;

	ID3D12Resource* texture = nullptr;
	gD3D12Device->CreateCommittedResource(&d3dHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12ResourceDesc,
		D3D12_RESOURCE_STATE_COPY_DEST,
		nullptr,
		IID_PPV_ARGS(&texture)
	);
	d3d12ResourceDesc = texture->GetDesc();
	UINT64 memorySizeUsed = 0;
	UINT64 rowSizeInBytes = 0;
	UINT rowUsed = 0;
	D3D12_PLACED_SUBRESOURCE_FOOTPRINT subresourceFootprint;
	gD3D12Device->GetCopyableFootprints(&d3d12ResourceDesc, 0, 1, 0,
		&subresourceFootprint, &rowUsed, &rowSizeInBytes, &memorySizeUsed);

	ID3D12Resource* tempBufferObject = nullptr;
	D3D12_HEAP_PROPERTIES d3dTempHeapProperties = {};
	d3dTempHeapProperties.Type = D3D12_HEAP_TYPE_UPLOAD;

	D3D12_RESOURCE_DESC d3d12TempResourceDesc = {};
	d3d12TempResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
	d3d12TempResourceDesc.Alignment = 0;
	d3d12TempResourceDesc.Width = memorySizeUsed;
	d3d12TempResourceDesc.Height = 1;
	d3d12TempResourceDesc.DepthOrArraySize = 1;
	d3d12TempResourceDesc.MipLevels = 1;
	d3d12TempResourceDesc.Format = DXGI_FORMAT_UNKNOWN;
	d3d12TempResourceDesc.SampleDesc.Count = 1;
	d3d12TempResourceDesc.SampleDesc.Quality = 0;
	d3d12TempResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
	d3d12TempResourceDesc.Flags = D3D12_RESOURCE_FLAG_NONE;

	gD3D12Device->CreateCommittedResource(
		&d3dTempHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12TempResourceDesc,
		D3D12_RESOURCE_STATE_GENERIC_READ,
		nullptr,
		IID_PPV_ARGS(&tempBufferObject)
	);
	BYTE* pData;
	tempBufferObject->Map(0, nullptr, reinterpret_cast<void**>(&pData));
	BYTE* pDstTempBuffer = reinterpret_cast<BYTE*>(pData + subresourceFootprint.Offset);
	const BYTE* pSrcData = reinterpret_cast<const BYTE*>(inPixelData);
	for (UINT i = 0; i < rowUsed; i++) {
		memcpy(pDstTempBuffer + subresourceFootprint.Footprint.RowPitch * i, pSrcData + rowSizeInBytes * i, rowSizeInBytes);
	}
	tempBufferObject->Unmap(0, nullptr);
	D3D12_TEXTURE_COPY_LOCATION dst = {};
	dst.pResource = texture;
	dst.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
	dst.SubresourceIndex = 0;

	D3D12_TEXTURE_COPY_LOCATION src = {};
	src.pResource = tempBufferObject;
	src.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
	src.PlacedFootprint = subresourceFootprint;
	inCommandList->CopyTextureRegion(&dst, 0, 0, 0, &src, nullptr);

	D3D12_RESOURCE_BARRIER barrier = InitResourceBarrier(texture,
		D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE);
	inCommandList->ResourceBarrier(1, &barrier);
	return texture;
}

//=================================================================================
// 渲染管线状态对象 (PSO)
// 包含: InputLayout / VS/GS/PS / Rasterizer / DepthStencil / Blend
//=================================================================================
ID3D12PipelineState* CreatePSO(ID3D12RootSignature* inID3D12RootSignature,
	D3D12_SHADER_BYTECODE inVertexShader, D3D12_SHADER_BYTECODE inPixelShader,
	D3D12_SHADER_BYTECODE inGSShader) {
	D3D12_INPUT_ELEMENT_DESC vertexDataElementDesc[] = {
		{"POSITION",0,DXGI_FORMAT_R32G32B32A32_FLOAT,0,0,D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,0},
		{"TEXCOORD",0,DXGI_FORMAT_R32G32B32A32_FLOAT,0,sizeof(float) * 4,D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,0},
		{"NORMAL",0,DXGI_FORMAT_R32G32B32A32_FLOAT,0,sizeof(float) * 8,D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,0},
		{"TANGENT",0,DXGI_FORMAT_R32G32B32A32_FLOAT,0,sizeof(float) * 12,D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,0}
	};
	D3D12_INPUT_LAYOUT_DESC vertexDataLayoutDesc = {};
	vertexDataLayoutDesc.NumElements = 4;
	vertexDataLayoutDesc.pInputElementDescs = vertexDataElementDesc;

	D3D12_GRAPHICS_PIPELINE_STATE_DESC psoDesc = {};
	psoDesc.pRootSignature = inID3D12RootSignature;
	psoDesc.VS = inVertexShader;
	psoDesc.GS = inGSShader;
	psoDesc.PS = inPixelShader;
	psoDesc.RTVFormats[0] = DXGI_FORMAT_R8G8B8A8_UNORM;
	psoDesc.DSVFormat = DXGI_FORMAT_D24_UNORM_S8_UINT;
	psoDesc.SampleDesc.Count = 1;
	psoDesc.SampleDesc.Quality = 0;
	psoDesc.SampleMask = 0xffffffff;
	psoDesc.InputLayout = vertexDataLayoutDesc;
	psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;

	psoDesc.RasterizerState.FillMode = ToD3D12(FillMode::Solid);
	psoDesc.RasterizerState.CullMode = ToD3D12(CullMode::Back);
	psoDesc.RasterizerState.DepthClipEnable = TRUE;

	psoDesc.DepthStencilState.DepthEnable = true;
	psoDesc.DepthStencilState.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ALL;
	psoDesc.DepthStencilState.DepthFunc = ToD3D12(ComparisonFunc::LessEqual);

	psoDesc.BlendState = { 0 };
	D3D12_RENDER_TARGET_BLEND_DESC rtBlendDesc = {
		FALSE,FALSE,
		ToD3D12(BlendFactor::SrcAlpha),ToD3D12(BlendFactor::InvSrcAlpha),ToD3D12(BlendOp::Add),
		ToD3D12(BlendFactor::SrcAlpha),ToD3D12(BlendFactor::InvSrcAlpha),ToD3D12(BlendOp::Add),
		ToD3D12(LogicOp::Noop),
		static_cast<UINT8>(ColorWriteMask::All),
	};
	for (int i = 0; i < D3D12_SIMULTANEOUS_RENDER_TARGET_COUNT; ++i)
		psoDesc.BlendState.RenderTarget[i] = rtBlendDesc;
	psoDesc.NumRenderTargets = 1;
	ID3D12PipelineState* d3d12PSO = nullptr;

	HRESULT hResult = gD3D12Device->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&d3d12PSO));
	if (FAILED(hResult)) {
		return nullptr;
	}
	return d3d12PSO;
}

//=================================================================================
// D3D12 初始化核心函数 (InitD3D12)
// 最小渲染系统初始化流程:
// 1. 启用Debug层 (可选, _DEBUG)
// 2. 创建IDXGIFactory4
// 3. 枚举Adapter, 创建ID3D12Device
// 4. 创建CommandQueue (命令队列)
// 5. 创建SwapChain (交换链)
// 6. 创建DepthStencilBuffer (深度缓冲)
// 7. 创建RTV/DSV描述符堆
// 8. 创建RenderTargetView / DepthStencilView
// 9. 创建CommandAllocator / CommandList
// 10. 创建Fence (同步)
//=================================================================================
bool InitD3D12(HWND inHWND, int inWidth, int inHeight) {
	HRESULT hResult;
	UINT dxgiFactoryFlags = 0;
#ifdef _DEBUG
	{
		ID3D12Debug* debugController = nullptr;
		if (SUCCEEDED(D3D12GetDebugInterface(IID_PPV_ARGS(&debugController)))) {
			debugController->EnableDebugLayer();
			dxgiFactoryFlags |= DXGI_CREATE_FACTORY_DEBUG;
		}
	}
#endif
	IDXGIFactory4* dxgiFactory;
	hResult = CreateDXGIFactory2(dxgiFactoryFlags, IID_PPV_ARGS(&dxgiFactory));
	if (FAILED(hResult)) {
		return false;
	}
	IDXGIAdapter1* adapter;
	int adapterIndex = 0;
	bool adapterFound = false;
	while (dxgiFactory->EnumAdapters1(adapterIndex, &adapter) != DXGI_ERROR_NOT_FOUND) {
		DXGI_ADAPTER_DESC1 desc;
		adapter->GetDesc1(&desc);
		if (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) {
			continue;
		}
		hResult = D3D12CreateDevice(adapter, D3D_FEATURE_LEVEL_11_0, __uuidof(ID3D12Device), nullptr);
		if (SUCCEEDED(hResult)) {
			adapterFound = true;
			break;
		}
		adapterIndex++;
	}
	if (false == adapterFound) {
		return false;
	}
	hResult = D3D12CreateDevice(adapter, D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&gD3D12Device));
	if (FAILED(hResult)) {
		return false;
	}
	D3D12_COMMAND_QUEUE_DESC d3d12CommandQueueDesc = {};
	hResult = gD3D12Device->CreateCommandQueue(&d3d12CommandQueueDesc, IID_PPV_ARGS(&gCommandQueue));
	if (FAILED(hResult)) {
		return false;
	}
	DXGI_SWAP_CHAIN_DESC swapChainDesc = {};
	swapChainDesc.BufferCount = 2;
	swapChainDesc.BufferDesc = {};
	swapChainDesc.BufferDesc.Width = inWidth;
	swapChainDesc.BufferDesc.Height = inHeight;
	swapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	swapChainDesc.OutputWindow = inHWND;
	swapChainDesc.SampleDesc.Count = 1;
	swapChainDesc.Windowed = true;
	swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;

	IDXGISwapChain* swapChain = nullptr;
	dxgiFactory->CreateSwapChain(gCommandQueue, &swapChainDesc, &swapChain);
	gSwapChain = static_cast<IDXGISwapChain3*>(swapChain);

	D3D12_HEAP_PROPERTIES d3dHeapProperties = {};
	d3dHeapProperties.Type = D3D12_HEAP_TYPE_DEFAULT;

	D3D12_RESOURCE_DESC d3d12ResourceDesc = {};
	d3d12ResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
	d3d12ResourceDesc.Alignment = 0;
	d3d12ResourceDesc.Width = inWidth;
	d3d12ResourceDesc.Height = inHeight;
	d3d12ResourceDesc.DepthOrArraySize = 1;
	d3d12ResourceDesc.MipLevels = 1;
	d3d12ResourceDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	d3d12ResourceDesc.SampleDesc.Count = 1;
	d3d12ResourceDesc.SampleDesc.Quality = 0;
	d3d12ResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
	d3d12ResourceDesc.Flags = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;

	D3D12_CLEAR_VALUE dsClearValue = {};
	dsClearValue.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	dsClearValue.DepthStencil.Depth = 1.0f;
	dsClearValue.DepthStencil.Stencil = 0;

	gD3D12Device->CreateCommittedResource(&d3dHeapProperties,
		D3D12_HEAP_FLAG_NONE,
		&d3d12ResourceDesc,
		D3D12_RESOURCE_STATE_DEPTH_WRITE,
		&dsClearValue,
		IID_PPV_ARGS(&gDSRT)
	);

	D3D12_DESCRIPTOR_HEAP_DESC d3dDescriptorHeapDescRTV = {};
	d3dDescriptorHeapDescRTV.NumDescriptors = 2;
	d3dDescriptorHeapDescRTV.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
	gD3D12Device->CreateDescriptorHeap(&d3dDescriptorHeapDescRTV, IID_PPV_ARGS(&gSwapChainRTVHeap));
	gRTVDescriptorSize = gD3D12Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);

	D3D12_DESCRIPTOR_HEAP_DESC d3dDescriptorHeapDescDSV = {};
	d3dDescriptorHeapDescDSV.NumDescriptors = 1;
	d3dDescriptorHeapDescDSV.Type = D3D12_DESCRIPTOR_HEAP_TYPE_DSV;
	gD3D12Device->CreateDescriptorHeap(&d3dDescriptorHeapDescDSV, IID_PPV_ARGS(&gSwapChainDSVHeap));
	gDSVDescriptorSize = gD3D12Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_DSV);

	D3D12_CPU_DESCRIPTOR_HANDLE rtvHeapStart = gSwapChainRTVHeap->GetCPUDescriptorHandleForHeapStart();
	for (int i = 0; i < 2; i++) {
		gSwapChain->GetBuffer(i, IID_PPV_ARGS(&gColorRTs[i]));
		D3D12_CPU_DESCRIPTOR_HANDLE rtvPointer;
		rtvPointer.ptr = rtvHeapStart.ptr + i * gRTVDescriptorSize;
		gD3D12Device->CreateRenderTargetView(gColorRTs[i], nullptr, rtvPointer);
	}
	D3D12_DEPTH_STENCIL_VIEW_DESC d3dDSViewDesc = {};
	d3dDSViewDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	d3dDSViewDesc.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;

	gD3D12Device->CreateDepthStencilView(gDSRT, &d3dDSViewDesc, gSwapChainDSVHeap->GetCPUDescriptorHandleForHeapStart());

	gD3D12Device->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&gCommandAllocator));
	gD3D12Device->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, gCommandAllocator, nullptr, IID_PPV_ARGS(&gCommandList));

	gD3D12Device->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&gFence));
	gFenceEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);

	return true;
}

//=================================================================================
// 命令相关辅助函数
//=================================================================================
ID3D12CommandAllocator* GetCommandAllocator() {
	return gCommandAllocator;
}

ID3D12GraphicsCommandList* GetCommandList() {
	return gCommandList;
}

void WaitForCompletionOfCommandList() {
	if (gFence->GetCompletedValue() < gFenceValue) {
		gFence->SetEventOnCompletion(gFenceValue, gFenceEvent);
		WaitForSingleObject(gFenceEvent, INFINITE);
	}
}

//=================================================================================
// 命令列表结束提交
// 关闭CommandList → ExecuteCommandLists → Signal Fence
//=================================================================================
void EndCommandList() {
	gCommandList->Close();
	ID3D12CommandList* ppCommandLists[] = { gCommandList };
	gCommandQueue->ExecuteCommandLists(1, ppCommandLists);
	gFenceValue += 1;
	gCommandQueue->Signal(gFence, gFenceValue);
}

//=================================================================================
// 开始渲染到SwapChain
// 1. 获取当前BackBuffer索引
// 2. 状态转换: PRESENT → RENDER_TARGET
// 3. 设置RenderTargets (Color + Depth)
// 4. 设置Viewport/Scissor
// 5. Clear Color/Depth
//=================================================================================
void BeginRenderToSwapChain(ID3D12GraphicsCommandList* inCommandList) {
	gCurrentRTIndex = gSwapChain->GetCurrentBackBufferIndex();
	D3D12_RESOURCE_BARRIER barrier = InitResourceBarrier(gColorRTs[gCurrentRTIndex], D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_RENDER_TARGET);
	inCommandList->ResourceBarrier(1, &barrier);
	D3D12_CPU_DESCRIPTOR_HANDLE colorRT, dsv;
	dsv.ptr = gSwapChainDSVHeap->GetCPUDescriptorHandleForHeapStart().ptr;
	colorRT.ptr = gSwapChainRTVHeap->GetCPUDescriptorHandleForHeapStart().ptr + gCurrentRTIndex * gRTVDescriptorSize;
	inCommandList->OMSetRenderTargets(1, &colorRT, FALSE, &dsv);
	D3D12_VIEWPORT viewport = { 0.0f,0.0f,1280.0f,720.0f };
	D3D12_RECT scissorRect = { 0,0,1280,720 };
	inCommandList->RSSetViewports(1, &viewport);
	inCommandList->RSSetScissorRects(1, &scissorRect);
	const float clearColor[] = { 0.0f,0.0f,0.0f,1.0f };
	inCommandList->ClearRenderTargetView(colorRT, clearColor, 0, nullptr);
	inCommandList->ClearDepthStencilView(dsv, D3D12_CLEAR_FLAG_DEPTH | D3D12_CLEAR_FLAG_STENCIL, 1.0f, 0, 0, nullptr);
}

//=================================================================================
// 结束渲染到SwapChain
// 状态转换: RENDER_TARGET → PRESENT
//=================================================================================
void EndRenderToSwapChain(ID3D12GraphicsCommandList* inCommandList) {
	D3D12_RESOURCE_BARRIER barrier = InitResourceBarrier(gColorRTs[gCurrentRTIndex], D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT);
	inCommandList->ResourceBarrier(1, &barrier);
}

//=================================================================================
// 交换缓冲区 (显示渲染结果)
//=================================================================================
void SwapD3D12Buffers() {
	gSwapChain->Present(0, 0);
}

//=================================================================================
// 获取D3D12设备
//=================================================================================
ID3D12Device* GetD3DDevice() {
	return gD3D12Device;
}

//=================================================================================
// Win32 窗口相关
//=================================================================================
LPCTSTR gWindowClassName = L"BattleFire";

//=================================================================================
// 窗口消息回调函数
//=================================================================================
LRESULT CALLBACK WindowProc(HWND inHWND, UINT inMSG, WPARAM inWParam, LPARAM inLParam) {
	switch (inMSG) {
	case WM_CLOSE:
		PostQuitMessage(0);
		break;
	}
	return DefWindowProc(inHWND, inMSG, inWParam, inLParam);
}

//=================================================================================
// 主入口函数 WinMain
// 程序入口点
//=================================================================================
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int inShowCmd) {
	WNDCLASSEX wndClassEx;
	wndClassEx.cbSize = sizeof(WNDCLASSEX);
	wndClassEx.style = CS_HREDRAW | CS_VREDRAW;
	wndClassEx.cbClsExtra = NULL;
	wndClassEx.cbWndExtra = NULL;
	wndClassEx.hInstance = hInstance;
	wndClassEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wndClassEx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
	wndClassEx.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndClassEx.hbrBackground = NULL;
	wndClassEx.lpszMenuName = NULL;
	wndClassEx.lpszClassName = gWindowClassName;
	wndClassEx.lpfnWndProc = WindowProc;
	if (!RegisterClassEx(&wndClassEx)) {
		MessageBox(NULL, L"Register Class Failed!", L"Error", MB_OK | MB_ICONERROR);
		return -1;
	}

	int viewportWidth = 1280;
	int viewportHeight = 720;
	RECT rect;
	rect.left = 0;
	rect.top = 0;
	rect.right = viewportWidth;
	rect.bottom = viewportHeight;
	AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, FALSE);
	int windowWidth = rect.right - rect.left;
	int windowHeight = rect.bottom - rect.top;
	HWND hwnd = CreateWindowEx(NULL,
		gWindowClassName,
		L"My Render Window",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, CW_USEDEFAULT,
		windowWidth, windowHeight,
		NULL,
		NULL,
		hInstance,
		NULL);
	if (!hwnd) {
		MessageBox(NULL, L"Create Window Failed!", L"Error", MB_OK | MB_ICONERROR);
		return -1;
	}

	InitD3D12(hwnd, 1280, 720);
	ID3D12GraphicsCommandList* commandList = GetCommandList();
	ID3D12CommandAllocator* commandAllocator = GetCommandAllocator();
	StaticMeshComponent staticMeshComponent;
	staticMeshComponent.InitFromFile(commandList, "Res/Model/Sphere.lhsm");

	ID3D12RootSignature* rootSignature = InitRootSignature();
	D3D12_SHADER_BYTECODE vs, gs, ps;
	CreateShaderFromFile(L"Res/Shader/gs.hlsl", "MainVS", "vs_5_1", &vs);
	CreateShaderFromFile(L"Res/Shader/gs.hlsl", "MainGS", "gs_5_1", &gs);
	CreateShaderFromFile(L"Res/Shader/gs.hlsl", "MainPS", "ps_5_1", &ps);
	ID3D12PipelineState* pso = CreatePSO(rootSignature, vs, ps, gs);

	ID3D12Resource* cb = CreateConstantBufferObject(65536);
	DirectX::XMMATRIX projectionMatrix = DirectX::XMMatrixPerspectiveFovLH(
		(45.0f * 3.141592f) / 180.0f, 1280.0f / 720.0f, 0.1f, 1000.0f);
	DirectX::XMMATRIX viewMatrix = DirectX::XMMatrixIdentity();
	DirectX::XMMATRIX modelMatrix = DirectX::XMMatrixTranslation(0.0f, 0.0f, 5.0f);
	DirectX::XMFLOAT4X4 tempMatrix;
	float matrices[64];

	DirectX::XMStoreFloat4x4(&tempMatrix, projectionMatrix);
	memcpy(matrices, &tempMatrix, sizeof(float) * 16);
	DirectX::XMStoreFloat4x4(&tempMatrix, viewMatrix);
	memcpy(matrices + 16, &tempMatrix, sizeof(float) * 16);
	DirectX::XMStoreFloat4x4(&tempMatrix, modelMatrix);
	memcpy(matrices + 32, &tempMatrix, sizeof(float) * 16);
	DirectX::XMVECTOR determinant;
	DirectX::XMMATRIX inverseModelMatrix = DirectX::XMMatrixInverse(&determinant, modelMatrix);
	if (DirectX::XMVectorGetX(determinant) != 0.0f) {
		DirectX::XMMATRIX normalMatrix = DirectX::XMMatrixTranspose(inverseModelMatrix);
		DirectX::XMStoreFloat4x4(&tempMatrix, modelMatrix);
		memcpy(matrices + 48, &tempMatrix, sizeof(float) * 16);
	}
	UpdateConstantBuffer(cb, matrices, sizeof(float) * 64);

	ID3D12Resource* sb = CreateConstantBufferObject(65536);
	struct MaterialData {
		float r;
	};
	MaterialData* materialDatas = new MaterialData[3000];
	for (int i = 0; i < 3000; i++) {
		materialDatas[i].r = srandom() * 0.1f + 0.1f;
	}
	UpdateConstantBuffer(sb, materialDatas, sizeof(MaterialData) * 3000);

	int imageWidth, imageHeight, imageChannel;
	stbi_uc* pixels = stbi_load("Res/Image/earth_d.jpg", &imageWidth, &imageHeight, &imageChannel, 4);
	ID3D12Resource* texture = CreateTexture2D(commandList, pixels,
		imageWidth * imageHeight * imageChannel, imageWidth, imageHeight, DXGI_FORMAT_R8G8B8A8_UNORM);
	delete[] pixels;
	ID3D12Device* d3dDevice = GetD3DDevice();

	ID3D12DescriptorHeap* srvHeap = nullptr;
	D3D12_DESCRIPTOR_HEAP_DESC d3dDescriptorHeapDescSRV = {};
	d3dDescriptorHeapDescSRV.NumDescriptors = 3;
	d3dDescriptorHeapDescSRV.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
	d3dDescriptorHeapDescSRV.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
	d3dDevice->CreateDescriptorHeap(&d3dDescriptorHeapDescSRV, IID_PPV_ARGS(&srvHeap));

	ID3D12DescriptorHeap* descriptorHeaps[] = { srvHeap };

	D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
	srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
	srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
	srvDesc.Texture2D.MipLevels = 1;

	D3D12_CPU_DESCRIPTOR_HANDLE srvHeapPtr = srvHeap->GetCPUDescriptorHandleForHeapStart();
	d3dDevice->CreateShaderResourceView(texture, &srvDesc, srvHeapPtr);
	srvHeapPtr.ptr += d3dDevice->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);

	EndCommandList();
	WaitForCompletionOfCommandList();

	ShowWindow(hwnd, inShowCmd);
	UpdateWindow(hwnd);
	float color[] = { 0.5f,0.5f,0.5f,1.0f };
	MSG msg;
	DWORD last_time = timeGetTime();
	DWORD appStartTime = last_time;
	while (true) {
		ZeroMemory(&msg, sizeof(MSG));
		if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
			if (msg.message == WM_QUIT) {
				break;
			}
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		} else {
			WaitForCompletionOfCommandList();
			DWORD current_time = timeGetTime();
			DWORD frameTime = current_time - last_time;
			DWORD timeSinceAppStartInMS = current_time - appStartTime;
			last_time = current_time;
			float frameTimeInSecond = float(frameTime) / 1000.0f;
			float timeSinceAppStartInSecond = float(timeSinceAppStartInMS) / 1000.0f;
			color[0] = timeSinceAppStartInSecond;
			commandAllocator->Reset();
			commandList->Reset(commandAllocator, nullptr);
			BeginRenderToSwapChain(commandList);
			commandList->SetPipelineState(pso);
			commandList->SetGraphicsRootSignature(rootSignature);
			commandList->SetDescriptorHeaps(_countof(descriptorHeaps), descriptorHeaps);
			commandList->SetGraphicsRootConstantBufferView(0, cb->GetGPUVirtualAddress());
			commandList->SetGraphicsRoot32BitConstants(1, 4, color, 0);
			commandList->SetGraphicsRootDescriptorTable(2, srvHeap->GetGPUDescriptorHandleForHeapStart());
			commandList->SetGraphicsRootShaderResourceView(3, sb->GetGPUVirtualAddress());
			commandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
			staticMeshComponent.Render(commandList);
			EndRenderToSwapChain(commandList);
			EndCommandList();
			SwapD3D12Buffers();
		}
	}
	return 0;
}