Fix incorrect multiple inclusion guards

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

diff --git a/source/colorcurve.h b/source/colorcurve.h
index 82a8526f2f113a91bec2e7217719825b1d6ea311..d7589cb565b8bacd4f63c0f60d672b294ec7d9bf 100644 (file)
--- a/source/colorcurve.h
+++ b/source/colorcurve.h
@@ -1,25 +1,29 @@
-#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 {
 
 /**
-Processes oversaturated colors to preserve hues.  When one color component 
+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.
 
-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:
@@ -33,6 +37,17 @@ 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 &);
 };