1#version 400 2out vec4 sk_FragColor; 3vec4 main() { 4 mat4 m44 = mat4(123.0); 5 vec4 v4 = vec4(0.0, 1.0, 2.0, 3.0); 6 return ((m44[0] * v4.x + m44[1] * v4.y) + m44[2] * v4.z) + m44[3] * v4.w; 7} 8