X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcolor.h;h=e57689bffe559d8f411670f910cceaa2ed94ead0;hp=7de2eedf019b276a4171112f2b7692853bbe3cf6;hb=4a1e2b6a68095e6bb7c212be57abb5a1509739b9;hpb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8

diff --git a/source/color.h b/source/color.h
index 7de2eedf..e57689bf 100644
--- a/source/color.h
+++ b/source/color.h
@@ -1,9 +1,17 @@
 #ifndef MSP_GL_COLOR_H_
 #define MSP_GL_COLOR_H_
 
+#include <cmath>
+
 namespace Msp {
 namespace GL {
 
+inline float to_srgb(float c)
+{ return (c<=0.0031308f ? 12.92f*c : 1.055f*std::pow(c, 1/2.4f)-0.055f); }
+
+inline float to_linear(float c)
+{ return (c<=0.04045 ? c/12.92f : std::pow((c+0.055f)/1.055f, 2.4f)); }
+
 struct Color
 {
 	float r, g, b, a;
@@ -13,9 +21,12 @@ struct Color
 	Color(float r_, float g_, float b_): r(r_), g(g_), b(b_), a(1) { }
 	Color(float r_, float g_, float b_, float a_): r(r_), g(g_), b(b_), a(a_) { }
 	Color operator*(float f) const { return Color(r*f, g*f, b*f, a); }
-	Color operator+(const Color &c) const { return Color(r+c.r, g+c.g, b+c.g, 1-(1-a)*(1-c.a)); }
-	bool operator==(const Color &c) const { return (r==c.r && b==c.b && g==c.g && a==c.a); }
+	Color operator+(const Color &c) const { return Color(r+c.r, g+c.g, b+c.b, 1-(1-a)*(1-c.a)); }
+	bool operator==(const Color &c) const { return (r==c.r && g==c.g && b==c.b && a==c.a); }
 	bool operator!=(const Color &c) const { return !operator==(c); }
+
+	Color to_srgb() const { return Color(GL::to_srgb(r), GL::to_srgb(g), GL::to_srgb(b), a); }
+	Color to_linear() const { return Color(GL::to_linear(r), GL::to_linear(g), GL::to_linear(b), a); }
 };
 
 } // namespace GL