- extern LIBCANVAS_API void color_to_hsv (Color color, double& h, double& s, double& v);
- extern LIBCANVAS_API Color hsv_to_color (double h, double s, double v, double a);
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- extern LIBCANVAS_API void color_to_rgba (Color, double& r, double& g, double& b, double& a);
- extern LIBCANVAS_API Color rgba_to_color (double r, double g, double b, double a);
-
- extern LIBCANVAS_API void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Color);
-