std140_layout_traits.hpp

/*
 * glslstruct - a C++ library designed to easily represent GLSL's Uniform Buffer Objects (UBOs) and Shader Storage Buffer Objects (SSBOs) in C++.
 *
 * Licensed under the BSD 3-Clause License with Attribution Requirement.
 * See the LICENSE file for details: https://github.com/MAIPA01/glslstruct/blob/main/LICENSE
 *
 * Copyright (c) 2025, Patryk Antosik (MAIPA01)
 */
 
#pragma once
#ifndef _GLSL_STRUCT_STD140_LAYOUT_TRAITS_HPP_
    #define _GLSL_STRUCT_STD140_LAYOUT_TRAITS_HPP_
 
    #include <glslstruct/config.hpp>
 
    #if !_GLSL_STRUCT_HAS_CXX17
_GLSL_STRUCT_ERROR("This is only available for c++17 and greater!");
    #else
 
        #include <glslstruct/layout/traits/contexts/layout_traits_contexts.hpp>
        #include <glslstruct/utils/ValueType.hpp>
 
namespace glslstruct {
    /**
     * @brief Std140 Layout additional context
     * @ingroup layout_traits
     */
    struct std140_layout_context : max_alignment_layout_context,
                                   struct_added_layout_context {};
 
    /**
     * @brief Std140 Layout traits
     * @ingroup layout_traits
     */
    struct std140_layout_traits {
        /// @brief std140 layout context type
        using context_type = std140_layout_context;
 
        /// @brief std140 layout scalar alignment
        static size_t get_scalar_alignment(ValueType valueType, context_type& ctx) noexcept;
 
        /// @brief std140 layout vec alignment
        static size_t get_vec_alignment(ValueType valueType, size_t length, context_type& ctx) noexcept;
 
        /// @brief std140 layout array alignment
        static size_t get_array_alignment(size_t elemBaseAlignment, context_type& ctx) noexcept;
 
        /// @brief std140 layout struct alignment
        static size_t get_struct_alignment(const context_type& ctx) noexcept;
 
        /// @brief std140 layout before_add action
        static void before_add(size_t& currentOffset, context_type& ctx) noexcept;
 
        /// @brief std140 layout after_add action
        static void after_add(size_t& currentOffset, size_t size, size_t alignment, context_type& ctx) noexcept;
 
        /// @brief std140 layout after_add_struct action
        static void after_add_struct(size_t& currentOffset, size_t size, size_t alignment, context_type& ctx) noexcept;
    };
} // namespace glslstruct
 
    #endif
#endif