qualifier.hpp

#pragma once

#include "setup.hpp"

namespace glm
{
    enum qualifier
    {
        packed_highp, 
        packed_mediump, 
        packed_lowp, 

#       if GLM_CONFIG_ALIGNED_GENTYPES == GLM_ENABLE
            aligned_highp, 
            aligned_mediump, 
            aligned_lowp, // ///< Typed data is aligned in memory allowing SIMD optimizations and operations are executed with high precision in term of ULPs to maximize performance
            aligned = aligned_highp, 
#       endif

        highp = packed_highp, 
        mediump = packed_mediump, 
        lowp = packed_lowp, 
        packed = packed_highp, 

#       if GLM_CONFIG_ALIGNED_GENTYPES == GLM_ENABLE && defined(GLM_FORCE_DEFAULT_ALIGNED_GENTYPES)
            defaultp = aligned_highp
#       else
            defaultp = highp
#       endif
    };

    typedef qualifier precision;

    template<length_t L, typename T, qualifier Q = defaultp> struct vec;
    template<length_t C, length_t R, typename T, qualifier Q = defaultp> struct mat;
    template<typename T, qualifier Q = defaultp> struct qua;

#   if GLM_HAS_TEMPLATE_ALIASES
        template <typename T, qualifier Q = defaultp> using tvec1 = vec<1, T, Q>;
        template <typename T, qualifier Q = defaultp> using tvec2 = vec<2, T, Q>;
        template <typename T, qualifier Q = defaultp> using tvec3 = vec<3, T, Q>;
        template <typename T, qualifier Q = defaultp> using tvec4 = vec<4, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat2x2 = mat<2, 2, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat2x3 = mat<2, 3, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat2x4 = mat<2, 4, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat3x2 = mat<3, 2, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat3x3 = mat<3, 3, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat3x4 = mat<3, 4, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat4x2 = mat<4, 2, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat4x3 = mat<4, 3, T, Q>;
        template <typename T, qualifier Q = defaultp> using tmat4x4 = mat<4, 4, T, Q>;
        template <typename T, qualifier Q = defaultp> using tquat = qua<T, Q>;
#   endif

namespace detail
{
    template<glm::qualifier P>
    struct is_aligned
    {
        static const bool value = false;
    };

#   if GLM_CONFIG_ALIGNED_GENTYPES == GLM_ENABLE
        template<>
        struct is_aligned<glm::aligned_lowp>
        {
            static const bool value = true;
        };

        template<>
        struct is_aligned<glm::aligned_mediump>
        {
            static const bool value = true;
        };

        template<>
        struct is_aligned<glm::aligned_highp>
        {
            static const bool value = true;
        };
#   endif

    template<length_t L, typename T, bool is_aligned>
    struct storage
    {
        typedef struct type {
            T data[L];
        } type;
    };

#   if GLM_HAS_ALIGNOF
        template<length_t L, typename T>
        struct storage<L, T, true>
        {
            typedef struct alignas(L * sizeof(T)) type {
                T data[L];
            } type;
        };

        template<typename T>
        struct storage<3, T, true>
        {
            typedef struct alignas(4 * sizeof(T)) type {
                T data[4];
            } type;
        };
#   endif

#   if GLM_ARCH & GLM_ARCH_SSE2_BIT
    template<>
    struct storage<4, float, true>
    {
        typedef glm_f32vec4 type;
    };

    template<>
    struct storage<4, int, true>
    {
        typedef glm_i32vec4 type;
    };

    template<>
    struct storage<4, unsigned int, true>
    {
        typedef glm_u32vec4 type;
    };

    template<>
    struct storage<2, double, true>
    {
        typedef glm_f64vec2 type;
    };

    template<>
    struct storage<2, detail::int64, true>
    {
        typedef glm_i64vec2 type;
    };

    template<>
    struct storage<2, detail::uint64, true>
    {
        typedef glm_u64vec2 type;
    };
#   endif

#   if (GLM_ARCH & GLM_ARCH_AVX_BIT)
    template<>
    struct storage<4, double, true>
    {
        typedef glm_f64vec4 type;
    };
#   endif

#   if (GLM_ARCH & GLM_ARCH_AVX2_BIT)
    template<>
    struct storage<4, detail::int64, true>
    {
        typedef glm_i64vec4 type;
    };

    template<>
    struct storage<4, detail::uint64, true>
    {
        typedef glm_u64vec4 type;
    };
#   endif

    enum genTypeEnum
    {
        GENTYPE_VEC,
        GENTYPE_MAT,
        GENTYPE_QUAT
    };

    template <typename genType>
    struct genTypeTrait
    {};

    template <length_t C, length_t R, typename T>
    struct genTypeTrait<mat<C, R, T> >
    {
        static const genTypeEnum GENTYPE = GENTYPE_MAT;
    };

    template<typename genType, genTypeEnum type>
    struct init_gentype
    {
    };

    template<typename genType>
    struct init_gentype<genType, GENTYPE_QUAT>
    {
        GLM_FUNC_QUALIFIER GLM_CONSTEXPR static genType identity()
        {
            return genType(1, 0, 0, 0);
        }
    };

    template<typename genType>
    struct init_gentype<genType, GENTYPE_MAT>
    {
        GLM_FUNC_QUALIFIER GLM_CONSTEXPR static genType identity()
        {
            return genType(1);
        }
    };
}//namespace detail
}//namespace glm