magnum/src/Magnum/Test/AbstractShaderProgramGLTestFiles/MyShader.frag

#if !defined(GL_ES) && __VERSION__ == 120
#define lowp
#endif

uniform lowp float multiplier;
uniform lowp vec4 color;
uniform lowp vec4 additions[3];

void main() {
    gl_FragColor = color*multiplier + additions[0] + additions[1] + additions[2];
}