hyperion.ng/libsrc/hyperion/ColorTransform.h
T. van der Zwan 39b98386dd Added simple QT-based grabber.
Moved ImageToLedsMap from include to libsrc.
Moved instantiation of objects to Hyperion (no JSON required outside this class).
2013-08-13 11:10:45 +02:00

56 lines
1.3 KiB
C++

#pragma once
// STL includes
#include <cstdint>
namespace hyperion
{
/// Transform for a single color byte value
///
/// Transforms are applied in the following order:
/// 1) a threshold is applied. All values below threshold will be set to zero
/// 2) gamma color correction is applied
/// 3) the output value is scaled from the [0:1] to [blacklevel:whitelevel]
/// 4) finally, in case of a weird choice of parameters, the output is clamped between [0:1]
///
/// All configuration values are doubles and assume the color value to be between 0 and 1
class ColorTransform
{
public:
ColorTransform();
ColorTransform(double threshold, double gamma, double blacklevel, double whitelevel);
~ColorTransform();
double getThreshold() const;
void setThreshold(double threshold);
double getGamma() const;
void setGamma(double gamma);
double getBlacklevel() const;
void setBlacklevel(double blacklevel);
double getWhitelevel() const;
void setWhitelevel(double whitelevel);
/// get the transformed value for the given byte value
uint8_t transform(uint8_t input) const
{
return _mapping[input];
}
private:
void initializeMapping();
private:
double _threshold;
double _gamma;
double _blacklevel;
double _whitelevel;
uint8_t _mapping[256];
};
} // end namespace hyperion