7 uniform mat4 mvp = mat4(1.);
13 /* These two blocks of code should produce the same result, but for some
14 * reason the tmp[3] assignment in the first version gets eliminated by
15 * one of Mesa's optimization passes.
24 gl_Position = mvp * tmp;
30 gl_FragColor = vec4(0., 1., 0., 1.);
41 draw arrays GL_TRIANGLE_FAN 0 4
42 relative probe rgb (.5, .5) (0.0, 1.0, 0.0)