rgba_color.hpp
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- /*
- * ===========================================================================
- * PRODUCTION $Log: rgba_color.hpp,v $
- * PRODUCTION Revision 1000.3 2004/06/01 19:51:17 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.11
- * PRODUCTION
- * ===========================================================================
- */
- #ifndef GUI_UTILS___RGBA_COLOR__HPP
- #define GUI_UTILS___RGBA_COLOR__HPP
- /* $Id: rgba_color.hpp,v 1000.3 2004/06/01 19:51:17 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Authors: Mike DiCuccio, Peter Meric
- *
- * File Description:
- * CRgbaColor - colors in the RGB colorspace, including transparency
- */
- #include <corelib/ncbistd.hpp>
- #include <gui/gui.hpp>
- /** @addtogroup GUI_UTILS
- *
- * @{
- */
- BEGIN_NCBI_SCOPE
- ///
- /// class CRgbaColor provides a simple abstraction for managing colors.
- ///
- class NCBI_GUIUTILS_EXPORT CRgbaColor
- {
- public:
- /// default ctor
- CRgbaColor();
- /// construct around a given float array
- CRgbaColor(const float* color, size_t size);
- /// construct with explicit (floating point) RGB values
- CRgbaColor(float r, float g, float b);
- /// construct with explicit (floating point) RGB+alpha values
- CRgbaColor(float r, float g, float b, float a);
- /// construct with explicit (unsigned char) RGB values. These are
- /// normalized to 0-1 internally.
- CRgbaColor(unsigned char r, unsigned char g, unsigned char b);
- /// construct with explicit (unsigned char) RGB+alpha values. These are
- /// normalized from 0-1 internally.
- CRgbaColor(unsigned char r, unsigned char g,
- unsigned char b, unsigned char a);
- /// construct from a string encoded in the form "r g b"
- explicit CRgbaColor(const string& s);
- /// virtual dtor
- virtual ~CRgbaColor();
- /// set the values from explicit (floating point) RGB values
- void Set(float r, float g, float b);
- /// set the values from explicit (floating point) RGB+alpha values
- void Set(float r, float g, float b, float a);
- /// set the values from explicit (unsigned char) RGB values. These
- /// are normalized internally to the range 0-1.
- void Set(unsigned char r, unsigned char g, unsigned char b);
- /// set the values from explicit (unsigned char) RGB+alpha values. These
- /// are normalized internally to the range 0-1.
- void Set(unsigned char r, unsigned char g,
- unsigned char b, unsigned char a);
- /// Set specific channels from floating point values
- void SetRed (float r);
- void SetGreen(float r);
- void SetBlue (float r);
- void SetAlpha(float r);
- /// Set specific channels from floating unsigned char values. These
- /// are normalized internally to the range 0-1.
- void SetRed (unsigned char r);
- void SetGreen(unsigned char r);
- void SetBlue (unsigned char r);
- void SetAlpha(unsigned char r);
- /// Get specific channels in floating point values.
- float GetRed (void) const;
- float GetGreen(void) const;
- float GetBlue (void) const;
- float GetAlpha(void) const;
- /// Get specific channels in unsigned char values.
- unsigned char GetRedUC (void) const;
- unsigned char GetGreenUC(void) const;
- unsigned char GetBlueUC (void) const;
- unsigned char GetAlphaUC(void) const;
- /// Access the color array directly.
- const float* GetColorArray(void) const;
- /// print the color to a stream in the form "r g b"
- virtual void PrintTo(CNcbiOstream& strm) const;
- virtual void PrintTo(CNcbiOstream& strm, bool printAlpha) const;
- /// Return a string representation of the current color
- virtual string ToString(bool printAlpha = true) const;
- /// Set the values from an encoded string of the form "r g b"
- virtual void ScanFrom(const string& str);
- // add a color to this color
- CRgbaColor& operator+=(const CRgbaColor& c1);
- // multiply this color by a scalar
- CRgbaColor& operator*=(float f);
- /// return a mapped color string from a named color
- static const char* ColorStrFromName(const string& desc);
- /// Interpolate two colors. The resulting color returned is
- /// ( (color1 * alpha) + (color2 * (1 - alpha) )
- static CRgbaColor Interpolate(const CRgbaColor& color1,
- const CRgbaColor& color2,
- float alpha);
- // lighten a color by a scaling factor. Scale must range from 0-1.
- // This is equivalent to interpolating the color with white, with the
- // exception that the alpha channel is not altered.
- void Lighten(float scale);
- // lighten a color by a scaling factor. Scale must range from 0-1.
- // This is equivalent to interpolating the color with black, with the
- // exception that the alpha channel is not altered.
- void Darken(float scale);
-
- private:
- float m_Rgba[4];
- };
- /// global comparison operator
- NCBI_GUIUTILS_EXPORT
- bool operator==(const CRgbaColor& c1, const CRgbaColor& c2);
- /// add two colors
- NCBI_GUIUTILS_EXPORT
- CRgbaColor operator+(const CRgbaColor& c1, const CRgbaColor& c2);
- /// multiply a color by a scalar
- NCBI_GUIUTILS_EXPORT
- CRgbaColor operator*(const CRgbaColor& c1, float f);
- END_NCBI_SCOPE
- /* @} */
- /*
- * ===========================================================================
- * $Log: rgba_color.hpp,v $
- * Revision 1000.3 2004/06/01 19:51:17 gouriano
- * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.11
- *
- * Revision 1.11 2004/05/11 13:48:14 dicuccio
- * Added Darken(), Lighten()
- *
- * Revision 1.10 2004/05/03 12:41:10 dicuccio
- * Split library into gui_utils and gui_objutils. Added #include for gui/gui.hpp
- *
- * Revision 1.9 2004/04/16 14:27:17 dicuccio
- * Added doxygen module tag
- *
- * Revision 1.8 2004/01/27 18:30:02 dicuccio
- * Added comments. Promoted member operators to global operators. Added
- * Interpolate()
- *
- * Revision 1.7 2003/12/22 19:16:08 dicuccio
- * Added functions to add/scale colors
- *
- * Revision 1.6 2003/10/30 13:32:52 rsmith
- * Add ColorStrFromName a static function to convert color names to color numbers:
- * e.g. "blue" -> "0 0 255"
- *
- * Revision 1.5 2003/09/01 12:42:34 meric
- * Added ScanFrom(const string&), which is now used by a ctor
- *
- * Revision 1.4 2003/08/25 18:02:19 rsmith
- * Colors to and from strings.
- *
- * Revision 1.3 2003/06/18 17:54:11 meric
- * Moved inline interface to .cpp file
- *
- * Revision 1.2 2003/06/18 17:25:27 meric
- * Final phase of print reorg: remove dependence on gui/opengl and OpenGL
- *
- * Revision 1.1 2003/06/18 16:42:09 meric
- * Initial version
- *
- *
- * ===========================================================================
- */
- #endif // GUI_UTILS___RGBA_COLOR__HPP