out vec4 sk_FragColor; uniform vec4 colorGreen; uniform vec4 colorRed; vec4 trueSide_h4h4(vec4 v) { return vec4(v.x, 1.0, v.zw); } vec4 falseSide_h4h4(vec4 v) { return vec4(v.x, 0.0, v.zw); } vec4 main() { return bool(colorGreen.y) ? trueSide_h4h4(colorGreen) : falseSide_h4h4(colorRed); }