0.9.9/api/a00272_source.html

 #pragma once
 #include "../detail/type_vec4.hpp"

 namespace glm
 {

     typedef vec<4, bool, highp>     highp_bvec4;

     typedef vec<4, bool, mediump>   mediump_bvec4;

     typedef vec<4, bool, lowp>      lowp_bvec4;

 }//namespace glm
glm::lowp_bvec4
vec< 4, bool, lowp > lowp_bvec4
4 components vector of low qualifier bool numbers.
Definition: vector_bool4_precision.hpp:28

glm::mediump_bvec4
vec< 4, bool, mediump > mediump_bvec4
4 components vector of medium qualifier bool numbers.
Definition: vector_bool4_precision.hpp:22

glm::highp_bvec4
vec< 4, bool, highp > highp_bvec4
4 components vector of high qualifier bool numbers.
Definition: vector_bool4_precision.hpp:16

glm
Definition: common.hpp:20