+void ColorCurve::set_exposure_adjust(float e)
+{
+ shdata.uniform("exposure", pow(2.0f, e));
+}
+
+void ColorCurve::set_brightness_response(float b)
+{
+ if(b<=0 || b>1)
+ throw invalid_argument("ColorCurve::set_brightness_response");
+ float t = (b<1 ? pow(b, 1/(1-b)) : 0.0f);
+ shdata.uniform("brightness_response", b, t, pow(t, b));
+}
+
+void ColorCurve::set_peak(float)