Rearrange soucre files into subdirectories

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

diff --git a/source/effects/colorcurve.h b/source/effects/colorcurve.h
new file mode 100644 (file)
index 0000000..3f65b04
--- /dev/null
+++ b/source/effects/colorcurve.h
@@ -0,0 +1,83 @@
+#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 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
+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;
+       Texturing texturing;
+       RefPtr<Mesh> quad;
+       RefPtr<Sampler> linear_sampler;
+       RefPtr<Sampler> nearest_sampler;
+
+public:
+       ColorCurve();
+
+       /** 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 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(Renderer &, const Texture2D &, const Texture2D &);
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif