/*----------------------------------------------------------------------  File    : xshades.h  Contents: X11 functions for color and grey shades allocation  Author  : Christian Borgelt  History : 07.01.2000 file created            09.01.2000 color offset saved in structure            30.01.2000 definition of SHD_MAXCNT added----------------------------------------------------------------------*/#ifndef __XSHADES__#define __XSHADES__#include <X11/Xlib.h>/*----------------------------------------------------------------------  Preprocessor Definitions----------------------------------------------------------------------*/#define SHD_BLACK     0         /* shade from black */#define SHD_WHITE     1         /* shade from white */#define SHD_MAXCNT  256         /* maximum number of shades *//*----------------------------------------------------------------------  Type Definitions----------------------------------------------------------------------*/typedef unsigned long PIXEL;    /* --- pixel -- */typedef struct {                /* --- shades --- */  Display  *disp;               /* display */  Colormap colmap;              /* colormap */  double   coloff;              /* color offset (in degrees) */  int      colcnt;              /* number of colors */  int      shdbase;             /* shade base (SHD_BLACK/SHD_WHITE) */  int      shdcnt;              /* number of shades per color */  PIXEL    *pixels[1];          /* pixel values of color shades */} SHADES;                       /* (shades) *//*----------------------------------------------------------------------  Functions----------------------------------------------------------------------*/extern SHADES* shd_create  (Display *disp, Colormap colmap,                            double coloff, int colcnt,                            int shdbase,   int shdcnt);extern void    shd_delete  (SHADES *shds);extern double  shd_coloff  (SHADES *shds);extern int     shd_colcnt  (SHADES *shds);extern int     shd_shdbase (SHADES *shds);extern int     shd_shdcnt  (SHADES *shds);extern PIXEL   shd_pixel   (SHADES *shds, int color, int shade);#ifndef NDEBUGextern void    shd_show    (SHADES *shds);#endif/*----------------------------------------------------------------------  Preprocessor Definitions----------------------------------------------------------------------*/#define shd_coloff(s)     ((s)->coloff)#define shd_colcnt(s)     ((s)->colcnt)#define shd_shdbase(s)    ((s)->shdbase)#define shd_shdcnt(s)     ((s)->shdcnt)#define shd_pixel(t,c,s)  ((t)->pixels[c][s])#endif