0.9.6/api/a00058_source.html

 #pragma once


 #include "detail/type_mat2x4.hpp"


 namespace glm

 {

         typedef tmat2x4<float, lowp>            lowp_mat2x4;


         typedef tmat2x4<float, mediump>         mediump_mat2x4;


         typedef tmat2x4<float, highp>           highp_mat2x4;


 }//namespace glm

type_mat2x4.hpp
OpenGL Mathematics (glm.g-truc.net)

glm::highp_mat2x4
tmat2x4< float, highp > highp_mat2x4
2 columns of 4 components matrix of high precision floating-point numbers.
Definition: type_mat.hpp:152

glm::lowp_mat2x4
tmat2x4< float, lowp > lowp_mat2x4
2 columns of 4 components matrix of low precision floating-point numbers.
Definition: type_mat.hpp:138

glm
Definition: _noise.hpp:39

glm::mediump_mat2x4
tmat2x4< float, mediump > mediump_mat2x4
2 columns of 4 components matrix of medium precision floating-point numbers.
Definition: type_mat.hpp:145