+ shprog("colorcurve.glsl"),
+ quad(get_fullscreen_quad()),
+ linear_sampler(get_linear_sampler()),
+ nearest_sampler(get_nearest_sampler())
+{
+ shdata.uniform("source", 0);
+ shdata.uniform("curve", 1);
+
+ curve.storage(LUMINANCE8, 256, 1);
+ texturing.attach(1, curve, linear_sampler.get());
+
+ set_exposure_adjust(0.0f);
+ set_brightness_response(0.4f);
+ set_linear();
+}
+
+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_gamma(float g)
+{
+ if(g<0.1 || g>10)
+ throw invalid_argument("ColorCurve::set_gamma");
+
+ unsigned char curve_data[256];
+ for(unsigned i=0; i<256; ++i)
+ curve_data[i] = pow(i/255.0f, 1/g)*255+0.5f;
+ curve.image(0, curve_data);
+}
+
+void ColorCurve::set_srgb()