-#ifndef COLORCURVE_H_
-#define COLORCURVE_H_
+#ifndef MSP_GL_COLORCURVE_H_
+#define MSP_GL_COLORCURVE_H_
#include "postprocessor.h"
#include "program.h"
#include "programdata.h"
+#include "texture1d.h"
namespace Msp {
namespace GL {
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.
-Only makes sense when used in an HDR framebuffer.
+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
+space and converting to sRGB for display.
*/
class ColorCurve: public PostProcessor
{
private:
Program shprog;
ProgramData shdata;
+ Texture1D curve;
const Mesh &quad;
public:
saturated value. */
void set_brightness(float);
+ /** Sets the gamma value used for mapping output colors. Allowed range is
+ from 0.1 to 10. */
+ void set_gamma(float);
+
+ /** Sets output mapping to sRGB. This is almost, but not exactly equivalent
+ to set_gamma(2.2). */
+ void set_srgb();
+
+ /// Sets output mapping to linear. This is equivalent to set_gamma(1).
+ void set_linear();
+
virtual void render(const Texture2D &, const Texture2D &);
};