mirror of
https://github.com/MobileGL-Dev/MobileGL
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178 lines
8.2 KiB
C++
178 lines
8.2 KiB
C++
// MobileGL - MobileGL/MG_Backend/DirectVulkan/Renderer/VertexInputStateFactory.cpp
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// Copyright (c) 2025-2026 MobileGL-Dev
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// Licensed under the GNU Lesser General Public License v3.0:
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// https://www.gnu.org/licenses/gpl-3.0.txt
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// https://www.gnu.org/licenses/lgpl-3.0.txt
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// SPDX-License-Identifier: LGPL-3.0-only
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// End of Source File Header
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#include "VertexInputStateFactory.h"
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#include "MG_Util/Converters/MGToStr/DataTypeConverter.h"
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namespace MobileGL::MG_Backend::DirectVulkan {
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VertexInputStateFactory::HashType VertexInputStateFactory::ComputeHash(
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const MG_State::GLState::VertexArrayObject& vao) const {
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XXHASH_VERIFY(XXH64_reset(m_hashState, m_config.CacheVersion));
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for (Int i = 0; i < MG_State::GLState::VertexArrayObject::MAX_VERTEX_ATTRIBS; ++i) {
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const auto& attr = vao.GetAttribute(i);
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Enabled, sizeof(attr.Enabled)));
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if (!attr.Enabled) {
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continue;
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}
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Size, sizeof(attr.Size)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Type, sizeof(attr.Type)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Normalized, sizeof(attr.Normalized)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Stride, sizeof(attr.Stride)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Offset, sizeof(attr.Offset)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.IsInteger, sizeof(attr.IsInteger)));
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XXHASH_VERIFY(XXH64_update(m_hashState, &attr.Divisor, sizeof(attr.Divisor)));
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const Uint bufferIndex = attr.Buffer ? attr.Buffer->GetExternalIndex() : 0;
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XXHASH_VERIFY(XXH64_update(m_hashState, &bufferIndex, sizeof(bufferIndex)));
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}
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return XXH64_digest(m_hashState);
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}
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const VertexInputStateFactory::BackendVertexInputState& VertexInputStateFactory::GetOrCreateVertexInputState(
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const MG_State::GLState::VertexArrayObject& vao) {
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const HashType hash = ComputeHash(vao);
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auto it = m_cache.find(hash);
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if (it != m_cache.end()) {
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return it->second;
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}
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VertexInputStateBuilder builder;
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for (Uint32 location = 0; location < MG_State::GLState::VertexArrayObject::MAX_VERTEX_ATTRIBS; ++location) {
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const auto& attr = vao.GetAttribute(location);
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if (!attr.Enabled || !attr.Buffer) {
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continue;
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}
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const auto vkFormat = ToVkVertexFormat(attr.Type, attr.Size, attr.Normalized, attr.IsInteger);
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if (vkFormat == VK_FORMAT_UNDEFINED) {
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MGLOG_W("Skipping unsupported vertex attribute layout (location=%u, type=%s, size=%d)",
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location, MG_Util::ConvertDataTypeToString(attr.Type).c_str(), attr.Size);
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continue;
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}
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const SizeT componentSize = GetComponentSize(attr.Type);
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if (componentSize == 0) {
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MGLOG_W("Skipping vertex attribute with unknown component size (location=%u, type=%s)",
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location, MG_Util::ConvertDataTypeToString(attr.Type).c_str());
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continue;
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}
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const Uint32 stride = attr.Stride > 0
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? static_cast<Uint32>(attr.Stride)
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: static_cast<Uint32>(componentSize * static_cast<SizeT>(attr.Size));
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const VkVertexInputRate inputRate =
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(attr.Divisor == 0) ? VK_VERTEX_INPUT_RATE_VERTEX : VK_VERTEX_INPUT_RATE_INSTANCE;
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builder
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.AddBinding(location, stride, inputRate)
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.AddAttribute(location, location, vkFormat, static_cast<Uint32>(attr.Offset));
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}
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const auto& state = builder.Build();
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auto& entry = m_cache[hash];
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entry.hash = hash;
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entry.bindings = builder.GetBindings();
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entry.attributes = builder.GetAttributes();
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entry.state = state;
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entry.state.pVertexBindingDescriptions = entry.bindings.empty() ? nullptr : entry.bindings.data();
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entry.state.pVertexAttributeDescriptions = entry.attributes.empty() ? nullptr : entry.attributes.data();
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return entry;
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}
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VkFormat VertexInputStateFactory::ToVkVertexFormat(DataType type, Int size, Bool normalized, Bool isInteger) {
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switch (type) {
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case DataType::Float32:
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switch (size) {
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case 1: return VK_FORMAT_R32_SFLOAT;
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case 2: return VK_FORMAT_R32G32_SFLOAT;
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case 3: return VK_FORMAT_R32G32B32_SFLOAT;
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case 4: return VK_FORMAT_R32G32B32A32_SFLOAT;
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Int32:
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if (!isInteger || normalized) return VK_FORMAT_UNDEFINED;
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switch (size) {
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case 1: return VK_FORMAT_R32_SINT;
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case 2: return VK_FORMAT_R32G32_SINT;
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case 3: return VK_FORMAT_R32G32B32_SINT;
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case 4: return VK_FORMAT_R32G32B32A32_SINT;
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Uint32:
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if (!isInteger || normalized) return VK_FORMAT_UNDEFINED;
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switch (size) {
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case 1: return VK_FORMAT_R32_UINT;
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case 2: return VK_FORMAT_R32G32_UINT;
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case 3: return VK_FORMAT_R32G32B32_UINT;
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case 4: return VK_FORMAT_R32G32B32A32_UINT;
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Int16:
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switch (size) {
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case 1: return normalized ? VK_FORMAT_R16_SNORM : (isInteger ? VK_FORMAT_R16_SINT : VK_FORMAT_UNDEFINED);
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case 2: return normalized ? VK_FORMAT_R16G16_SNORM : (isInteger ? VK_FORMAT_R16G16_SINT : VK_FORMAT_UNDEFINED);
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case 3: return VK_FORMAT_UNDEFINED;
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case 4: return normalized ? VK_FORMAT_R16G16B16A16_SNORM : (isInteger ? VK_FORMAT_R16G16B16A16_SINT : VK_FORMAT_UNDEFINED);
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Uint16:
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switch (size) {
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case 1: return normalized ? VK_FORMAT_R16_UNORM : (isInteger ? VK_FORMAT_R16_UINT : VK_FORMAT_UNDEFINED);
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case 2: return normalized ? VK_FORMAT_R16G16_UNORM : (isInteger ? VK_FORMAT_R16G16_UINT : VK_FORMAT_UNDEFINED);
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case 3: return VK_FORMAT_UNDEFINED;
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case 4: return normalized ? VK_FORMAT_R16G16B16A16_UNORM : (isInteger ? VK_FORMAT_R16G16B16A16_UINT : VK_FORMAT_UNDEFINED);
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Int8:
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switch (size) {
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case 1: return normalized ? VK_FORMAT_R8_SNORM : (isInteger ? VK_FORMAT_R8_SINT : VK_FORMAT_UNDEFINED);
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case 2: return normalized ? VK_FORMAT_R8G8_SNORM : (isInteger ? VK_FORMAT_R8G8_SINT : VK_FORMAT_UNDEFINED);
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case 3: return VK_FORMAT_UNDEFINED;
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case 4: return normalized ? VK_FORMAT_R8G8B8A8_SNORM : (isInteger ? VK_FORMAT_R8G8B8A8_SINT : VK_FORMAT_UNDEFINED);
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default: return VK_FORMAT_UNDEFINED;
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}
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case DataType::Uint8:
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switch (size) {
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case 1: return normalized ? VK_FORMAT_R8_UNORM : (isInteger ? VK_FORMAT_R8_UINT : VK_FORMAT_UNDEFINED);
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case 2: return normalized ? VK_FORMAT_R8G8_UNORM : (isInteger ? VK_FORMAT_R8G8_UINT : VK_FORMAT_UNDEFINED);
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case 3: return VK_FORMAT_UNDEFINED;
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case 4: return normalized ? VK_FORMAT_R8G8B8A8_UNORM : (isInteger ? VK_FORMAT_R8G8B8A8_UINT : VK_FORMAT_UNDEFINED);
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default: return VK_FORMAT_UNDEFINED;
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}
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default:
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return VK_FORMAT_UNDEFINED;
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}
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}
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SizeT VertexInputStateFactory::GetComponentSize(DataType type) {
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switch (type) {
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case DataType::Int8:
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case DataType::Uint8:
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return 1;
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case DataType::Int16:
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case DataType::Uint16:
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case DataType::Float16:
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return 2;
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case DataType::Int32:
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case DataType::Uint32:
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case DataType::Float32:
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case DataType::Fixed32:
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return 4;
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case DataType::Float64:
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return 8;
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default:
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return 0;
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}
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}
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} // namespace MobileGL::MG_Backend::DirectVulkan
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