175 lines
3.7 KiB
C++
175 lines
3.7 KiB
C++
// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Utility/FieldOffsets.hpp>
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#include <Nazara/Core/Algorithm.hpp>
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#include <cassert>
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#include <memory>
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#include <Nazara/Utility/Debug.hpp>
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namespace Nz
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{
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inline FieldOffsets::FieldOffsets(StructLayout layout) :
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m_largestFieldAlignment(1),
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m_offsetRounding(1),
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m_size(0),
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m_layout(layout)
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{
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}
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inline std::size_t FieldOffsets::GetLargestFieldAlignement() const
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{
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return m_largestFieldAlignment;
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}
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inline StructLayout FieldOffsets::GetLayout() const
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{
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return m_layout;
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}
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inline std::size_t FieldOffsets::GetAlignedSize() const
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{
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if (m_layout == StructLayout::Std140)
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return Align(m_size, m_largestFieldAlignment);
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else
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return m_size;
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}
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inline std::size_t FieldOffsets::GetSize() const
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{
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return m_size;
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}
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inline std::size_t FieldOffsets::GetAlignement(StructLayout layout, StructFieldType fieldType)
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{
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switch (layout)
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{
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case StructLayout::Packed:
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return 1;
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case StructLayout::Std140:
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{
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switch (fieldType)
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{
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case StructFieldType::Bool1:
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case StructFieldType::Float1:
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case StructFieldType::Int1:
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case StructFieldType::UInt1:
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return 4;
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case StructFieldType::Bool2:
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case StructFieldType::Float2:
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case StructFieldType::Int2:
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case StructFieldType::UInt2:
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return 2 * 4;
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case StructFieldType::Bool3:
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case StructFieldType::Float3:
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case StructFieldType::Int3:
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case StructFieldType::UInt3:
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case StructFieldType::Bool4:
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case StructFieldType::Float4:
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case StructFieldType::Int4:
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case StructFieldType::UInt4:
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return 4 * 4;
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case StructFieldType::Double1:
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return 8;
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case StructFieldType::Double2:
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return 2 * 8;
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case StructFieldType::Double3:
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case StructFieldType::Double4:
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return 4 * 8;
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}
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}
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}
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return 0;
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}
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inline std::size_t FieldOffsets::GetCount(StructFieldType fieldType)
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{
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switch (fieldType)
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{
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case StructFieldType::Bool1:
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case StructFieldType::Double1:
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case StructFieldType::Float1:
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case StructFieldType::Int1:
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case StructFieldType::UInt1:
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return 1;
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case StructFieldType::Bool2:
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case StructFieldType::Double2:
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case StructFieldType::Float2:
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case StructFieldType::Int2:
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case StructFieldType::UInt2:
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return 2;
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case StructFieldType::Bool3:
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case StructFieldType::Double3:
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case StructFieldType::Float3:
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case StructFieldType::Int3:
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case StructFieldType::UInt3:
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return 3;
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case StructFieldType::Bool4:
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case StructFieldType::Double4:
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case StructFieldType::Float4:
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case StructFieldType::Int4:
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case StructFieldType::UInt4:
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return 4;
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}
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return 0;
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}
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inline std::size_t FieldOffsets::GetSize(StructFieldType fieldType)
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{
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switch (fieldType)
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{
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case StructFieldType::Bool1:
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case StructFieldType::Float1:
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case StructFieldType::Int1:
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case StructFieldType::UInt1:
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return 4;
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case StructFieldType::Bool2:
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case StructFieldType::Float2:
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case StructFieldType::Int2:
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case StructFieldType::UInt2:
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return 2 * 4;
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case StructFieldType::Bool3:
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case StructFieldType::Float3:
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case StructFieldType::Int3:
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case StructFieldType::UInt3:
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return 3 * 4;
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case StructFieldType::Bool4:
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case StructFieldType::Float4:
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case StructFieldType::Int4:
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case StructFieldType::UInt4:
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return 4 * 4;
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case StructFieldType::Double1:
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return 8;
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case StructFieldType::Double2:
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return 2 * 8;
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case StructFieldType::Double3:
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return 3 * 8;
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case StructFieldType::Double4:
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return 4 * 8;
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}
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return 0;
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}
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}
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#include <Nazara/Utility/DebugOff.hpp>
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