Improve the color curve postprocessor

[libs/gl.git] / source / colorcurve.h

diff --git a/source/colorcurve.h b/source/colorcurve.h
index 2b854bec8b6f8ac5392f010e64a06b5269b83415..608af44888ce9edcc3030d135cac98abb3728772 100644 (file)
--- a/source/colorcurve.h
+++ b/source/colorcurve.h
@@ -12,8 +12,8 @@ namespace GL {
 
 /**
 Processes oversaturated colors to preserve hues.  When one color component
-exceeds 1.0, the others are scaled towards white.  A transition curve is also
-applied near 1.0 to prevent the abrupt change in the gradient.
+exceeds 1.0, the overflow is distributed to the other components, scaling the
+color towards white.
 
 Gamma or sRGB correction can also be applied to the output.  It can be used to
 improve color reproduction by performing lighting calculations in linear color
@@ -31,12 +31,15 @@ private:
 public:
        ColorCurve();
 
-       /// Sets the size of the peak zone.  Must be between 0 and 1, inclusive.
-       void set_peak(float);
+       /** Set exposure adjustment in EV units.  Positive values brighten the
+       image, negative values darken it.  Zero is neutral. */
+       void set_exposure_adjust(float);
+
+       /** Sets the exponent of the */
+       void set_brightness_response(float);
 
-       /** Sets brightness for oversaturated colors.  Must be >= 1.  Suggested
-       values are between 1.5 and 2.0; a value of 1.0 will clamp colors to the
-       saturated value. */
+       // Deprecated functions
+       void set_peak(float);
        void set_brightness(float);
 
        /** Sets the gamma value used for mapping output colors.  Allowed range is