[require] GLSL >= 1.20 [vertex shader file] glsl-mvp.vert [fragment shader] void main() { const float x = max(0.25, -5.0); const vec2 v = max(vec2(0.5, 0.2), 0.25); gl_FragColor = vec4(x, v, 1.0); } [test] draw rect -1 -1 2 2 probe all rgb 0.25 0.5 0.25