source: NonGTP/glut/FLTK/include/fltk/Color.h @ 814

//
// "$Id: Color.h 3203 2004-01-25 06:55:06Z spitzak $"
//
// Color value. These are 32-bit unsigned numbers with RGB as the
// upper 3 bytes. The lowest-order byte is treated as an "index"
// for back compatabilty, or as an "alpha", depending on context.
//
// Copyright 2002 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//

#ifndef fltk_Color_h
#define fltk_Color_h

#include "FL_API.h"
#include "Flags.h"

namespace fltk {

/*! \addtogroup color
  \{ */

typedef unsigned Color;

/*! Symbolic names for some of the indexed colors.

  The 24-entry "gray ramp" is modified by fltk::set_background() so
  that the color fltk::GRAY75 is the background color, and the others
  are a nice range from black to white. These are used to draw box
  edges. The gray levels are chosen to be evenly spaced, listed here
  is the actual 8-bit and decimal gray level assigned by default.
  Also listed here is the letter used for fltk::FrameBox and the old
  fltk1.1 names used for these levels.

  The remiander of the colormap is a 5x8x5 color cube. This cube is
  used to dither images on 8-bit screens X colormaps to reduce the
  number of colors used.
*/
enum {
  NO_COLOR      = 0, /*!< Black, empty place holder in Style */

                      // Hex   Decimal FrameBox Old names
  GRAY00        = 32, /*!< 00   .00     A       fltk1: GRAY0 GRAY_RAMP */
  GRAY05        = 33, /*!< 0d   .05     B */
  GRAY10        = 34, /*!< 1a   .10     C */
  GRAY15        = 35, /*!< 26   .15     D */
  GRAY20        = 36, /*!< 31   .19     E */
  GRAY25        = 37, /*!< 3d   .24     F */
  GRAY30        = 38, /*!< 48   .28     G */
  GRAY33        = 39, /*!< 55   .33     H       fltk1: DARK3 */
  GRAY35        = 40, /*!< 5f   .37     I */
  GRAY40        = 41, /*!< 6a   .42     J       (18% gray card) */
  GRAY45        = 42, /*!< 75   .46     K */
  GRAY50        = 43, /*!< 80   .50     L */
  GRAY55        = 44, /*!< 8a   .54     M */
  GRAY60        = 45, /*!< 95   .58     N       fltk1: DARK2 */
  GRAY65        = 46, /*!< a0   .63     O */
  GRAY66        = 47, /*!< aa   .67     P       fltk1: DARK1 INACTIVE_COLOR */
  GRAY70        = 48, /*!< b5   .71     Q */
  GRAY75        = 49, /*!< c0   .75     R       fltk1: GRAY SELECTION_COLOR */
  GRAY80        = 50, /*!< cb   .80     S */
  GRAY85        = 51, /*!< d5   .84     T       fltk1: LIGHT1 */
  //unnamed entry          e0   .88     U
  GRAY90        = 53, /*!< ea   .92     V       fltk1: LIGHT2 */
  GRAY95        = 54, /*!< f5   .96     W */
  GRAY99        = 55, /*!< ff  1.00     X       fltk1: LIGHT3 */

  BLACK         = 0x38, /*!< Corner of color cube */
  RED           = 0x58, /*!< Corner of color cube */
  GREEN         = 0x3f, /*!< Corner of color cube */
  YELLOW        = 0x5f, /*!< Corner of color cube */
  BLUE          = 0xd8, /*!< Corner of color cube */
  MAGENTA       = 0xf8, /*!< Corner of color cube */
  CYAN          = 0xdf, /*!< Corner of color cube */
  WHITE         = 0xff, /*!< Corner of color cube */

  WINDOWS_BLUE  = 0x88 /*!< default selection_color */
};

inline Color color(unsigned char r, unsigned char g, unsigned char b) {
  return Color((r<<24)+(g<<16)+(b<<8));}
inline Color color(unsigned char g) {
  return Color(g*0x1010100u);}
FL_API Color color(const char*);
FL_API Color lerp(Color c0, Color c1, float f);
FL_API Color inactive(Color);
FL_API Color inactive(Color, Flags f);
FL_API Color contrast(Color fg, Color bg);
FL_API void split_color(Color c, unsigned char& r, unsigned char& g, unsigned char& b);
FL_API void set_color_index(Color index, Color);
FL_API Color get_color_index(Color index);
FL_API void set_background(Color);
FL_API Color nearest_index(Color);

/* \} */
}

#endif

//
// End of "$Id: Color.h 3203 2004-01-25 06:55:06Z spitzak $".
//