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Diffstat (limited to 'libs/gtkmm2ext/gtkmm2ext/colors.h')
| -rw-r--r-- | libs/gtkmm2ext/gtkmm2ext/colors.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/libs/gtkmm2ext/gtkmm2ext/colors.h b/libs/gtkmm2ext/gtkmm2ext/colors.h new file mode 100644 index 0000000000..3ec6ae3a81 --- /dev/null +++ b/libs/gtkmm2ext/gtkmm2ext/colors.h @@ -0,0 +1,138 @@ +/* + Copyright (C) 2011-2013 Paul Davis + Author: Carl Hetherington <cth@carlh.net> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#ifndef _GTKMM2EXT_COLORS_H_ +#define _GTKMM2EXT_COLORS_H_ + +#include <cairomm/context.h> + +#include "gtkmm2ext/visibility.h" + +namespace Gtkmm2ext +{ + +typedef uint32_t Color; + +/* conventient way to use Gtkmm2ext::Color with libcairo */ +extern LIBGTKMM2EXT_API void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Gtkmm2ext::Color); +extern LIBGTKMM2EXT_API void set_source_rgb_a (Cairo::RefPtr<Cairo::Context>, Gtkmm2ext::Color, float alpha); //override the color's alpha + +extern LIBGTKMM2EXT_API void set_source_rgba (cairo_t*, Gtkmm2ext::Color); +extern LIBGTKMM2EXT_API void set_source_rgb_a (cairo_t*, Gtkmm2ext::Color, float alpha); //override the color's alpha + + +struct LIBGTKMM2EXT_API HSV; +struct LIBGTKMM2EXT_API HSVA; + +extern LIBGTKMM2EXT_API Color change_alpha (Color, double alpha); + +extern LIBGTKMM2EXT_API Color hsva_to_color (double h, double s, double v, double a = 1.0); +extern LIBGTKMM2EXT_API void color_to_hsva (Color color, double& h, double& s, double& v, double& a); +extern LIBGTKMM2EXT_API Color color_at_alpha (Color, double a); +extern LIBGTKMM2EXT_API void color_to_hsv (Color color, double& h, double& s, double& v); +extern LIBGTKMM2EXT_API void color_to_rgba (Color, double& r, double& g, double& b, double& a); +extern LIBGTKMM2EXT_API Color rgba_to_color (double r, double g, double b, double a); + +uint32_t LIBGTKMM2EXT_API contrasting_text_color (uint32_t c); + +struct LIBGTKMM2EXT_API HSV; + +class LIBGTKMM2EXT_API SVAModifier +{ +public: + enum Type { + Add, + Multiply, + Assign + }; + + SVAModifier (std::string const &); + SVAModifier (Type t, double ss, double vv, double aa) : type (t), _s (ss) , _v (vv) , _a (aa) {} + SVAModifier () : type (Add), _s (0), _v (0), _a (0) {} /* no-op modifier */ + + double s() const { return _s; } + double v() const { return _v; } + double a() const { return _a; } + + HSV operator () (HSV& hsv) const; + std::string to_string () const; + void from_string (std::string const &); + +private: + Type type; + double _s; + double _v; + double _a; +}; + +struct LIBGTKMM2EXT_API HSV +{ + HSV (); + HSV (double h, double s, double v, double a = 1.0); + HSV (Color); + + double h; + double s; + double v; + double a; + + std::string to_string() const; + bool is_gray() const; + + Color color() const { return hsva_to_color (h,s, v, a); } + operator Color() const { return color(); } + + HSV mod (SVAModifier const & svam); + + HSV operator+ (const HSV&) const; + HSV operator- (const HSV&) const; + + HSV& operator=(Color); + HSV& operator=(const std::string&); + + bool operator== (const HSV& other); + + double distance (const HSV& other) const; + HSV delta (const HSV& other) const; + + HSV darker (double factor = 1.3) const { return shade (factor); } + HSV lighter (double factor = 0.7) const { return shade (factor); } + + HSV shade (double factor) const; + HSV mix (const HSV& other, double amt) const; + + HSV opposite() const; + HSV complement() const { return opposite(); } + + HSV bw_text () const; + HSV text() const; + HSV selected () const; + HSV outline() const; + + void print (std::ostream&) const; + +protected: + void clamp (); +}; + +} /* namespace */ + +std::ostream& operator<<(std::ostream& o, const Gtkmm2ext::HSV& hsv); + +#endif |