mat< 2, 4, float, highp > highp_mat2x4
2 columns of 4 components matrix of high qualifier floating-point numbers.
mat< 2, 4, float, lowp > lowp_mat2x4
2 columns of 4 components matrix of low qualifier floating-point numbers.
mat< 2, 4, float, mediump > mediump_mat2x4
2 columns of 4 components matrix of medium qualifier floating-point numbers.