#include "stdafx.h"
#if defined(DX12_SUPPORT)
#include "D3D12Buffer.h"
#include "Utilities/Log.h"

#include "D3D12GSRender.h"

const int g_vertexCount = 32;

// Where are these type defined ???
static
DXGI_FORMAT getFormat(u8 type, u8 size)
{
	/*static const u32 gl_types[] =
	{
	GL_SHORT,
	GL_FLOAT,
	GL_HALF_FLOAT,
	GL_UNSIGNED_BYTE,
	GL_SHORT,
	GL_FLOAT, // Needs conversion
	GL_UNSIGNED_BYTE,
	};

	static const bool gl_normalized[] =
	{
	GL_TRUE,
	GL_FALSE,
	GL_FALSE,
	GL_TRUE,
	GL_FALSE,
	GL_TRUE,
	GL_FALSE,
	};*/
	static const DXGI_FORMAT typeX1[] =
	{
		DXGI_FORMAT_R16_SNORM,
		DXGI_FORMAT_R32_FLOAT,
		DXGI_FORMAT_R16_FLOAT,
		DXGI_FORMAT_R8_UNORM,
		DXGI_FORMAT_R16_SINT,
		DXGI_FORMAT_R32_FLOAT,
		DXGI_FORMAT_R8_UINT
	};
	static const DXGI_FORMAT typeX2[] =
	{
		DXGI_FORMAT_R16G16_SNORM,
		DXGI_FORMAT_R32G32_FLOAT,
		DXGI_FORMAT_R16G16_FLOAT,
		DXGI_FORMAT_R8G8_UNORM,
		DXGI_FORMAT_R16G16_SINT,
		DXGI_FORMAT_R32G32_FLOAT,
		DXGI_FORMAT_R8G8_UINT
	};
	static const DXGI_FORMAT typeX3[] =
	{
		DXGI_FORMAT_R16G16B16A16_SNORM,
		DXGI_FORMAT_R32G32B32_FLOAT,
		DXGI_FORMAT_R16G16B16A16_FLOAT,
		DXGI_FORMAT_R8G8B8A8_UNORM,
		DXGI_FORMAT_R16G16B16A16_SINT,
		DXGI_FORMAT_R32G32B32_FLOAT,
		DXGI_FORMAT_R8G8B8A8_UINT
	};
	static const DXGI_FORMAT typeX4[] =
	{
		DXGI_FORMAT_R16G16B16A16_SNORM,
		DXGI_FORMAT_R32G32B32A32_FLOAT,
		DXGI_FORMAT_R16G16B16A16_FLOAT,
		DXGI_FORMAT_R8G8B8A8_UNORM,
		DXGI_FORMAT_R16G16B16A16_SINT,
		DXGI_FORMAT_R32G32B32A32_FLOAT,
		DXGI_FORMAT_R8G8B8A8_UINT
	};

	switch (size)
	{
	case 1:
		return typeX1[type];
	case 2:
		return typeX2[type];
	case 3:
		return typeX3[type];
	case 4:
		return typeX4[type];
	default:
		LOG_ERROR(RSX, "Wrong size for vertex attrib : %d", size);
		return DXGI_FORMAT();
	}
}

struct VertexBufferFormat
{
	std::pair<size_t, size_t> range;
	std::vector<size_t> attributeId;
	size_t elementCount;
	size_t stride;
};

std::vector<D3D12_INPUT_ELEMENT_DESC> getIALayout(ID3D12Device *device, const std::vector<VertexBufferFormat> &vertexBufferFormat, const RSXVertexData *m_vertex_data)
{
	std::vector<D3D12_INPUT_ELEMENT_DESC> result;

	for (size_t inputSlot = 0; inputSlot < vertexBufferFormat.size(); inputSlot++)
	{
		for (size_t attributeId : vertexBufferFormat[inputSlot].attributeId)
		{
			const RSXVertexData &vertexData = m_vertex_data[attributeId];
			D3D12_INPUT_ELEMENT_DESC IAElement = {};
			IAElement.SemanticName = "TEXCOORD";
			IAElement.SemanticIndex = (UINT)attributeId;
			IAElement.InputSlot = (UINT)inputSlot;
			IAElement.Format = getFormat(vertexData.type - 1, vertexData.size);
			IAElement.AlignedByteOffset = (UINT)(vertexData.addr - vertexBufferFormat[inputSlot].range.first);
			IAElement.InputSlotClass = (vertexData.addr > 0) ? D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA : D3D12_INPUT_CLASSIFICATION_PER_INSTANCE_DATA;
			IAElement.InstanceDataStepRate = (vertexData.addr > 0) ? 0 : 0;
			result.push_back(IAElement);
		}
	}
	return result;
}

template<typename IndexType, typename DstType, typename SrcType>
void expandIndexedQuads(DstType *dst, const SrcType *src, size_t indexCount)
{
	IndexType *typedDst = reinterpret_cast<IndexType *>(dst);
	const IndexType *typedSrc = reinterpret_cast<const IndexType *>(src);
	for (unsigned i = 0; i < indexCount / 4; i++)
	{
		// First triangle
		typedDst[6 * i] = typedSrc[4 * i];
		typedDst[6 * i + 1] = typedSrc[4 * i + 1];
		typedDst[6 * i + 2] = typedSrc[4 * i + 2];
		// Second triangle
		typedDst[6 * i + 3] = typedSrc[4 * i + 2];
		typedDst[6 * i + 4] = typedSrc[4 * i + 3];
		typedDst[6 * i + 5] = typedSrc[4 * i];
	}
}



// D3D12GS member handling buffers



#define MIN2(x, y) ((x) < (y)) ? (x) : (y)
#define MAX2(x, y) ((x) > (y)) ? (x) : (y)

static
bool overlaps(const std::pair<size_t, size_t> &range1, const std::pair<size_t, size_t> &range2)
{
	return !(range1.second < range2.first || range2.second < range1.first);
}

static
std::vector<VertexBufferFormat> FormatVertexData(const RSXVertexData *m_vertex_data)
{
	std::vector<VertexBufferFormat> Result;
	for (size_t i = 0; i < 32; ++i)
	{
		const RSXVertexData &vertexData = m_vertex_data[i];
		if (!vertexData.IsEnabled()) continue;

		size_t elementCount = vertexData.data.size() / (vertexData.size * vertexData.GetTypeSize());
		// If there is a single element, stride is 0, use the size of element instead
		size_t stride = vertexData.stride;
		size_t elementSize = vertexData.GetTypeSize();
		std::pair<size_t, size_t> range = std::make_pair(vertexData.addr, vertexData.addr + elementSize * vertexData.size + (elementCount - 1) * stride - 1);
		bool isMerged = false;

		for (VertexBufferFormat &vbf : Result)
		{
			if (overlaps(vbf.range, range) && vbf.stride == stride)
			{
				// Extend buffer if necessary
				vbf.range.first = MIN2(vbf.range.first, range.first);
				vbf.range.second = MAX2(vbf.range.second, range.second);
				vbf.elementCount = MAX2(vbf.elementCount, elementCount);

				vbf.attributeId.push_back(i);
				isMerged = true;
				break;
			}
		}
		if (isMerged)
			continue;
		VertexBufferFormat newRange = { range, std::vector<size_t>{ i }, elementCount, stride };
		Result.emplace_back(newRange);
	}
	return Result;
}

/**
 * Create a new vertex buffer with attributes from vbf using vertexIndexHeap as storage heap.
 */
static
ComPtr<ID3D12Resource> createVertexBuffer(const VertexBufferFormat &vbf, const RSXVertexData *vertexData, ID3D12Device *device, DataHeap<ID3D12Heap, 65536> &vertexIndexHeap)
{
	size_t subBufferSize = vbf.range.second - vbf.range.first + 1;
	// Make multiple of stride
	if (vbf.stride)
		subBufferSize = ((subBufferSize + vbf.stride - 1) / vbf.stride) * vbf.stride;
	assert(vertexIndexHeap.canAlloc(subBufferSize));
	size_t heapOffset = vertexIndexHeap.alloc(subBufferSize);

	ComPtr<ID3D12Resource> vertexBuffer;
	ThrowIfFailed(device->CreatePlacedResource(
		vertexIndexHeap.m_heap,
		heapOffset,
		&getBufferResourceDesc(subBufferSize),
		D3D12_RESOURCE_STATE_GENERIC_READ,
		nullptr,
		IID_PPV_ARGS(vertexBuffer.GetAddressOf())
		));
	void *bufferMap;
	ThrowIfFailed(vertexBuffer->Map(0, nullptr, (void**)&bufferMap));
	memset(bufferMap, -1, subBufferSize);
	#pragma omp parallel for
	for (int vertex = 0; vertex < vbf.elementCount; vertex++)
	{
		for (size_t attributeId : vbf.attributeId)
		{
			if (!vertexData[attributeId].addr)
			{
				memcpy(bufferMap, vertexData[attributeId].data.data(), vertexData[attributeId].data.size());
				continue;
			}
			size_t baseOffset = (size_t)vertexData[attributeId].addr - vbf.range.first;
			size_t tsize = vertexData[attributeId].GetTypeSize();
			size_t size = vertexData[attributeId].size;
			auto src = vm::get_ptr<const u8>(vertexData[attributeId].addr + (int)vbf.stride * vertex);
			char* dst = (char*)bufferMap + baseOffset + vbf.stride * vertex;

			switch (tsize)
			{
			case 1:
			{
				memcpy(dst, src, size);
				break;
			}

			case 2:
			{
				const u16* c_src = (const u16*)src;
				u16* c_dst = (u16*)dst;
				for (u32 j = 0; j < size; ++j) *c_dst++ = _byteswap_ushort(*c_src++);
				break;
			}

			case 4:
			{
				const u32* c_src = (const u32*)src;
				u32* c_dst = (u32*)dst;
				for (u32 j = 0; j < size; ++j) *c_dst++ = _byteswap_ulong(*c_src++);
				break;
			}
			}
		}
	}

	vertexBuffer->Unmap(0, nullptr);
	return vertexBuffer;
}

static bool
isContained(const std::vector<std::pair<u32, u32> > &ranges, const std::pair<u32, u32> &range)
{
	for (auto &r : ranges)
	{
		if (r == range)
			return true;
	}
	return false;
}

std::vector<D3D12_VERTEX_BUFFER_VIEW> D3D12GSRender::UploadVertexBuffers(bool indexed_draw)
{
	std::vector<D3D12_VERTEX_BUFFER_VIEW> result;
	const std::vector<VertexBufferFormat> &vertexBufferFormat = FormatVertexData(m_vertex_data);
	m_IASet = getIALayout(m_device.Get(), vertexBufferFormat, m_vertex_data);

	const u32 data_offset = indexed_draw ? 0 : m_draw_array_first;

	for (size_t buffer = 0; buffer < vertexBufferFormat.size(); buffer++)
	{
		const VertexBufferFormat &vbf = vertexBufferFormat[buffer];
		// Make multiple of stride
		size_t subBufferSize = vbf.range.second - vbf.range.first + 1;
		if (vbf.stride)
			subBufferSize = ((subBufferSize + vbf.stride - 1) / vbf.stride) * vbf.stride;

		u64 key = vbf.range.first;
		key = key << 32;
		key = key | vbf.range.second;
		auto It = m_vertexCache.find(key);

		ID3D12Resource *vertexBuffer;
		if (vbf.range.first != 0 && // Attribute is stored in a buffer, not inline in command buffer
			It != m_vertexCache.end())
			vertexBuffer = It->second;
		else
		{
			ComPtr<ID3D12Resource> newVertexBuffer = createVertexBuffer(vbf, m_vertex_data, m_device.Get(), m_vertexIndexData);
			vertexBuffer = newVertexBuffer.Get();
			m_vertexCache[key] = newVertexBuffer.Get();
			getCurrentResourceStorage().m_singleFrameLifetimeResources.push_back(newVertexBuffer);
		}

		D3D12_VERTEX_BUFFER_VIEW vertexBufferView = {};
		vertexBufferView.BufferLocation = vertexBuffer->GetGPUVirtualAddress();
		vertexBufferView.SizeInBytes = (UINT)subBufferSize;
		vertexBufferView.StrideInBytes = (UINT)vbf.stride;
		result.push_back(vertexBufferView);
	}

	return result;
}

D3D12_INDEX_BUFFER_VIEW D3D12GSRender::uploadIndexBuffers(bool indexed_draw)
{
	D3D12_INDEX_BUFFER_VIEW indexBufferView = {};
	// Only handle quads and triangle fan now
	bool forcedIndexBuffer = false;
	switch (m_draw_mode - 1)
	{
	default:
	case GL_POINTS:
	case GL_LINES:
	case GL_LINE_LOOP:
	case GL_LINE_STRIP:
	case GL_TRIANGLES:
	case GL_TRIANGLE_STRIP:
	case GL_QUAD_STRIP:
	case GL_POLYGON:
		forcedIndexBuffer = false;
		break;
	case GL_TRIANGLE_FAN:
	case GL_QUADS:
		forcedIndexBuffer = true;
		break;
	}

	// No need for index buffer
	if (!indexed_draw && !forcedIndexBuffer)
	{
		m_renderingInfo.m_indexed = false;
		m_renderingInfo.m_count = m_draw_array_count;
		m_renderingInfo.m_baseVertex = m_draw_array_first;
		return indexBufferView;
	}

	m_renderingInfo.m_indexed = true;

	// Index type
	size_t indexSize;
	if (!indexed_draw)
	{
		indexBufferView.Format = DXGI_FORMAT_R16_UINT;
		indexSize = 2;
	}
	else
	{
		switch (m_indexed_array.m_type)
		{
		default: abort();
		case CELL_GCM_DRAW_INDEX_ARRAY_TYPE_16:
			indexBufferView.Format = DXGI_FORMAT_R16_UINT;
			indexSize = 2;
			break;
		case CELL_GCM_DRAW_INDEX_ARRAY_TYPE_32:
			indexBufferView.Format = DXGI_FORMAT_R32_UINT;
			indexSize = 4;
			break;
		}
	}

	// Index count
	if (indexed_draw && !forcedIndexBuffer)
		m_renderingInfo.m_count = m_indexed_array.m_data.size() / indexSize;
	else if (indexed_draw && forcedIndexBuffer)
		m_renderingInfo.m_count = 6 * m_indexed_array.m_data.size() / (4 * indexSize);
	else
	{
		switch (m_draw_mode - 1)
		{
		case GL_TRIANGLE_FAN:
			m_renderingInfo.m_count = (m_draw_array_count - 2) * 3;
			break;
		case GL_QUADS:
			m_renderingInfo.m_count = m_draw_array_count * 6 / 4;
			break;
		}
	}

	// Base vertex
	if (!indexed_draw && forcedIndexBuffer)
		m_renderingInfo.m_baseVertex = m_draw_array_first;
	else
		m_renderingInfo.m_baseVertex = 0;

	// Alloc
	size_t subBufferSize = align(m_renderingInfo.m_count * indexSize, 64);

	assert(m_vertexIndexData.canAlloc(subBufferSize));
	size_t heapOffset = m_vertexIndexData.alloc(subBufferSize);

	ComPtr<ID3D12Resource> indexBuffer;
	ThrowIfFailed(m_device->CreatePlacedResource(
		m_vertexIndexData.m_heap,
		heapOffset,
		&getBufferResourceDesc(subBufferSize),
		D3D12_RESOURCE_STATE_GENERIC_READ,
		nullptr,
		IID_PPV_ARGS(indexBuffer.GetAddressOf())
		));

	void *bufferMap;
	ThrowIfFailed(indexBuffer->Map(0, nullptr, (void**)&bufferMap));
	if (indexed_draw && !forcedIndexBuffer)
		streamBuffer(bufferMap, m_indexed_array.m_data.data(), subBufferSize);
	else if (indexed_draw && forcedIndexBuffer)
	{
		// Only quads supported now
		switch (m_indexed_array.m_type)
		{
		case CELL_GCM_DRAW_INDEX_ARRAY_TYPE_32:
			expandIndexedQuads<unsigned int>(bufferMap, m_indexed_array.m_data.data(), m_indexed_array.m_data.size() / 4);
			break;
		case CELL_GCM_DRAW_INDEX_ARRAY_TYPE_16:
			expandIndexedQuads<unsigned short>(bufferMap, m_indexed_array.m_data.data(), m_indexed_array.m_data.size() / 2);
			break;
		}
	}
	else
	{
		unsigned short *typedDst = static_cast<unsigned short *>(bufferMap);
		switch (m_draw_mode - 1)
		{
		case GL_TRIANGLE_FAN:
			for (unsigned i = 0; i < (m_draw_array_count - 2); i++)
			{
				typedDst[3 * i] = 0;
				typedDst[3 * i + 1] = i + 2 - 1;
				typedDst[3 * i + 2] = i + 2;
			}
			break;
		case GL_QUADS:
			for (unsigned i = 0; i < m_draw_array_count / 4; i++)
			{
				// First triangle
				typedDst[6 * i] = 4 * i;
				typedDst[6 * i + 1] = 4 * i + 1;
				typedDst[6 * i + 2] = 4 * i + 2;
				// Second triangle
				typedDst[6 * i + 3] = 4 * i + 2;
				typedDst[6 * i + 4] = 4 * i + 3;
				typedDst[6 * i + 5] = 4 * i;
			}
			break;
		}

	}
	indexBuffer->Unmap(0, nullptr);
	getCurrentResourceStorage().m_singleFrameLifetimeResources.push_back(indexBuffer);

	indexBufferView.SizeInBytes = (UINT)subBufferSize;
	indexBufferView.BufferLocation = indexBuffer->GetGPUVirtualAddress();
	return indexBufferView;
}

void D3D12GSRender::setScaleOffset()
{
	float scaleOffsetMat[16] =
	{
		1.0f, 0.0f, 0.0f, 0.0f,
		0.0f, -1.0f, 0.0f, 0.0f,
		0.0f, 0.0f, 1.0f, 0.0f,
		0.0f, 0.0f, 0.0f, 1.0f
	};

	// Scale
	scaleOffsetMat[0] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 0)] / (m_surface_clip_w / 2.f);
	scaleOffsetMat[5] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 1)] / (m_surface_clip_h / 2.f);
	scaleOffsetMat[10] = (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 2)];

	// Offset
	scaleOffsetMat[3] = (float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 0)] - (m_surface_clip_w / 2.f);
	scaleOffsetMat[7] = -((float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 1)] - (m_surface_clip_h / 2.f));
	scaleOffsetMat[11] = (float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 2)];

	scaleOffsetMat[3] /= m_surface_clip_w / 2.f;
	scaleOffsetMat[7] /= m_surface_clip_h / 2.f;

	assert(m_constantsData.canAlloc(256));
	size_t heapOffset = m_constantsData.alloc(256);

	// Scale offset buffer
	// Separate constant buffer
	D3D12_RANGE range = { heapOffset, heapOffset + 256 };

	void *scaleOffsetMap;
	ThrowIfFailed(m_constantsData.m_heap->Map(0, &range, &scaleOffsetMap));
	streamToBuffer((char*)scaleOffsetMap + heapOffset, scaleOffsetMat, 16 * sizeof(float));
	int isAlphaTested = m_set_alpha_test;
	memcpy((char*)scaleOffsetMap + heapOffset + 16 * sizeof(float), &isAlphaTested, sizeof(int));
	memcpy((char*)scaleOffsetMap + heapOffset + 17 * sizeof(float), &m_alpha_ref, sizeof(float));
	m_constantsData.m_heap->Unmap(0, &range);

	D3D12_CONSTANT_BUFFER_VIEW_DESC constantBufferViewDesc = {};
	constantBufferViewDesc.BufferLocation = m_constantsData.m_heap->GetGPUVirtualAddress() + heapOffset;
	constantBufferViewDesc.SizeInBytes = (UINT)256;
	D3D12_CPU_DESCRIPTOR_HANDLE Handle = getCurrentResourceStorage().m_scaleOffsetDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
	Handle.ptr += getCurrentResourceStorage().m_currentScaleOffsetBufferIndex * m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
	m_device->CreateConstantBufferView(&constantBufferViewDesc, Handle);
}

void D3D12GSRender::FillVertexShaderConstantsBuffer()
{
	for (const RSXTransformConstant& c : m_transform_constants)
	{
		size_t offset = c.id * 4 * sizeof(float);
		m_vertexConstants[offset] = c;
	}

	size_t bufferSize = 512 * 4 * sizeof(float);

	assert(m_constantsData.canAlloc(bufferSize));
	size_t heapOffset = m_constantsData.alloc(bufferSize);

	D3D12_RANGE range = { heapOffset, heapOffset + bufferSize };

	void *constantsBufferMap;
	ThrowIfFailed(m_constantsData.m_heap->Map(0, &range, &constantsBufferMap));
	for (const auto &vertexConstants : m_vertexConstants)
	{
		float data[4] = {
			vertexConstants.second.x,
			vertexConstants.second.y,
			vertexConstants.second.z,
			vertexConstants.second.w
		};
		streamToBuffer((char*)constantsBufferMap + heapOffset + vertexConstants.first, data, 4 * sizeof(float));
	}
	m_constantsData.m_heap->Unmap(0, &range);

	D3D12_CONSTANT_BUFFER_VIEW_DESC constantBufferViewDesc = {};
	constantBufferViewDesc.BufferLocation = m_constantsData.m_heap->GetGPUVirtualAddress() + heapOffset;
	constantBufferViewDesc.SizeInBytes = (UINT)bufferSize;
	D3D12_CPU_DESCRIPTOR_HANDLE Handle = getCurrentResourceStorage().m_constantsBufferDescriptorsHeap->GetCPUDescriptorHandleForHeapStart();
	Handle.ptr += getCurrentResourceStorage().m_constantsBufferIndex * m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
	m_device->CreateConstantBufferView(&constantBufferViewDesc, Handle);
}

void D3D12GSRender::FillPixelShaderConstantsBuffer()
{
	// Get constant from fragment program
	const std::vector<size_t> &fragmentOffset = m_cachePSO.getFragmentConstantOffsetsCache(m_cur_fragment_prog);
	size_t bufferSize = fragmentOffset.size() * 4 * sizeof(float) + 1;
	// Multiple of 256 never 0
	bufferSize = (bufferSize + 255) & ~255;

	assert(m_constantsData.canAlloc(bufferSize));
	size_t heapOffset = m_constantsData.alloc(bufferSize);

	D3D12_RANGE range = { heapOffset, heapOffset + bufferSize };

	size_t offset = 0;
	void *constantsBufferMap;
	ThrowIfFailed(m_constantsData.m_heap->Map(0, &range, &constantsBufferMap));
	for (size_t offsetInFP : fragmentOffset)
	{
		u32 vector[4];
		// Is it assigned by color register in command buffer ?
		// TODO : we loop every iteration, we might do better...
		bool isCommandBufferSetConstant = false;
		for (const RSXTransformConstant& c : m_fragment_constants)
		{
			size_t fragmentId = c.id - m_cur_fragment_prog->offset;
			if (fragmentId == offsetInFP)
			{
				isCommandBufferSetConstant = true;
				vector[0] = (u32&)c.x;
				vector[1] = (u32&)c.y;
				vector[2] = (u32&)c.z;
				vector[3] = (u32&)c.w;
				break;
			}
		}
		if (!isCommandBufferSetConstant)
		{
			auto data = vm::ptr<u32>::make(m_cur_fragment_prog->addr + (u32)offsetInFP);

			u32 c0 = (data[0] >> 16 | data[0] << 16);
			u32 c1 = (data[1] >> 16 | data[1] << 16);
			u32 c2 = (data[2] >> 16 | data[2] << 16);
			u32 c3 = (data[3] >> 16 | data[3] << 16);

			vector[0] = c0;
			vector[1] = c1;
			vector[2] = c2;
			vector[3] = c3;
		}

		streamToBuffer((char*)constantsBufferMap + heapOffset + offset, vector, 4 * sizeof(u32));
		offset += 4 * sizeof(u32);
	}
	m_constantsData.m_heap->Unmap(0, &range);

	D3D12_CONSTANT_BUFFER_VIEW_DESC constantBufferViewDesc = {};
	constantBufferViewDesc.BufferLocation = m_constantsData.m_heap->GetGPUVirtualAddress() + heapOffset;
	constantBufferViewDesc.SizeInBytes = (UINT)bufferSize;
	D3D12_CPU_DESCRIPTOR_HANDLE Handle = getCurrentResourceStorage().m_constantsBufferDescriptorsHeap->GetCPUDescriptorHandleForHeapStart();
	Handle.ptr += getCurrentResourceStorage().m_constantsBufferIndex * m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
	m_device->CreateConstantBufferView(&constantBufferViewDesc, Handle);
}


#endif