+#define use_colorspace_gamma() App::use_colorspace_gamma
+#define colorspace_gamma() (2.2f)
+#define gamma_in(x) ((x>=0) ? pow((float)x,1.0f/colorspace_gamma()) : -pow((float)-x,1.0f/colorspace_gamma()))
+#define gamma_out(x) ((x>=0) ? pow((float)x, colorspace_gamma()) : -pow((float)-x, colorspace_gamma()))
+