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[require] GLSL >= 1.20 [vertex shader file] glsl-mvp.vert [fragment shader] void main() { const bvec4 res = equal(bvec4(true, false, false, true), bvec4(true, true, false, false)); gl_FragColor = (res == bvec4(true, false, true, false)) ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0); } [test] clear color 0.0 0.0 0.0 0.0 clear ortho draw rect 10 10 10 10 probe rgb 15 15 0.0 1.0 0.0