X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcolorcurve.h;h=3f65b04916897c6d85bde7ec4f33fece160a3cd1;hp=75e7fd302a76a2bea330162942c7c881379dd2c5;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=aa987216b92584aafc0ecbc3d578606018078f91

diff --git a/source/colorcurve.h b/source/colorcurve.h
index 75e7fd30..3f65b049 100644
--- a/source/colorcurve.h
+++ b/source/colorcurve.h
@@ -1,45 +1,80 @@
-#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"
+#include "texturing.h"
 
 namespace Msp {
 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.
 
-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
 {
+public:
+	struct Template: public PostProcessor::Template
+	{
+		class Loader: public DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>
+		{
+		public:
+			Loader(Template &);
+
+		private:
+			void gamma(float);
+			void srgb();
+		};
+
+		float exposure_adjust;
+		float brightness_response;
+		float gamma;
+		bool srgb;
+
+		Template();
+
+		virtual ColorCurve *create(unsigned, unsigned) const;
+	};
+
 private:
 	Program shprog;
 	ProgramData shdata;
 	Texture1D curve;
-	const Mesh &quad;
+	Texturing texturing;
+	RefPtr<Mesh> quad;
+	RefPtr<Sampler> linear_sampler;
+	RefPtr<Sampler> nearest_sampler;
 
 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 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. */
-	void set_brightness(float);
+	/** Sets the exponent of the */
+	void set_brightness_response(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 &);
+	virtual void render(Renderer &, const Texture2D &, const Texture2D &);
 };
 
 } // namespace GL