func_packing.inl

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#include "../common.hpp"
#include "type_half.hpp"
 
namespace glm
{
    GLM_FUNC_QUALIFIER uint packUnorm2x16(vec2 const& v)
    {
        union
        {
            unsigned short in[2];
            uint out;
        } u;
 
        vec<2, unsigned short, defaultp> result(round(clamp(v, 0.0f, 1.0f) * 65535.0f));
 
        u.in[0] = result[0];
        u.in[1] = result[1];
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint p)
    {
        union
        {
            uint in;
            unsigned short out[2];
        } u;
 
        u.in = p;
 
        return vec2(u.out[0], u.out[1]) * 1.5259021896696421759365224689097e-5f;
    }
 
    GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const& v)
    {
        union
        {
            signed short in[2];
            uint out;
        } u;
 
        vec<2, short, defaultp> result(round(clamp(v, -1.0f, 1.0f) * 32767.0f));
 
        u.in[0] = result[0];
        u.in[1] = result[1];
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint p)
    {
        union
        {
            uint in;
            signed short out[2];
        } u;
 
        u.in = p;
 
        return clamp(vec2(u.out[0], u.out[1]) * 3.0518509475997192297128208258309e-5f, -1.0f, 1.0f);
    }
 
    GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const& v)
    {
        union
        {
            unsigned char in[4];
            uint out;
        } u;
 
        vec<4, unsigned char, defaultp> result(round(clamp(v, 0.0f, 1.0f) * 255.0f));
 
        u.in[0] = result[0];
        u.in[1] = result[1];
        u.in[2] = result[2];
        u.in[3] = result[3];
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint p)
    {
        union
        {
            uint in;
            unsigned char out[4];
        } u;
 
        u.in = p;
 
        return vec4(u.out[0], u.out[1], u.out[2], u.out[3]) * 0.0039215686274509803921568627451f;
    }
 
    GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const& v)
    {
        union
        {
            signed char in[4];
            uint out;
        } u;
 
        vec<4, signed char, defaultp> result(round(clamp(v, -1.0f, 1.0f) * 127.0f));
 
        u.in[0] = result[0];
        u.in[1] = result[1];
        u.in[2] = result[2];
        u.in[3] = result[3];
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint p)
    {
        union
        {
            uint in;
            signed char out[4];
        } u;
 
        u.in = p;
 
        return clamp(vec4(u.out[0], u.out[1], u.out[2], u.out[3]) * 0.0078740157480315f, -1.0f, 1.0f);
    }
 
    GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const& v)
    {
        union
        {
            uint   in[2];
            double out;
        } u;
 
        u.in[0] = v[0];
        u.in[1] = v[1];
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double v)
    {
        union
        {
            double in;
            uint   out[2];
        } u;
 
        u.in = v;
 
        return uvec2(u.out[0], u.out[1]);
    }
 
    GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const& v)
    {
        union
        {
            signed short in[2];
            uint out;
        } u;
 
        u.in[0] = detail::toFloat16(v.x);
        u.in[1] = detail::toFloat16(v.y);
 
        return u.out;
    }
 
    GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint v)
    {
        union
        {
            uint in;
            signed short out[2];
        } u;
 
        u.in = v;
 
        return vec2(
            detail::toFloat32(u.out[0]),
            detail::toFloat32(u.out[1]));
    }
}//namespace glm
 
#if GLM_CONFIG_SIMD == GLM_ENABLE
#   include "func_packing_simd.inl"
#endif