symbol.h

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#ifndef GRASS_SYMBOL_H
#define GRASS_SYMBOL_H

/* definitions and structures */

/* Warning : structure is not exactly the same as format. */

#define S_NONE    0             /* no object (used for reading) */

/* elements */
#define S_LINE    1             /* line */
#define S_ARC     2             /* arc */

/* parts */
#define S_STRING  1
#define S_POLYGON 2

#define S_COL_DEFAULT 1         /* default color */
#define S_COL_NONE    2         /* no color */
#define S_COL_DEFINED 3         /* color defined in symbol file */

typedef struct
{
    int color;                  /* reset default */
    int r, g, b;
    double fr, fg, fb;
} SYMBCOLOR;

/* symbol element: line or arc */
typedef struct
{
    int type;                   /* S_LINE or S_ARC */
    union
    {
        struct
        {
            int count, alloc;
            double *x, *y;
        } line;
        struct
        {
            int clock;          /* 1 clockwise, 0 counter clockwise */
            double x, y, r, a1, a2;
        } arc;
    } coor;
} SYMBEL;

/* string of elements */
typedef struct
{
    int count, alloc;           /* number of elements */
    SYMBEL **elem;              /* array of elements */
    int scount, salloc;         /* number of points in stroked version */
    double *sx, *sy;            /* coordinates in stroked version */
} SYMBCHAIN;

/* part */
typedef struct
{
    int type;                   /* S_STRING or S_POLYGON */
    SYMBCOLOR color;
    SYMBCOLOR fcolor;
    int count, alloc;           /* number of rings */
    SYMBCHAIN **chain;          /* array strings */
} SYMBPART;

typedef struct
{
    double scale;               /* to get symbol of size 1, each vertex must be multiplied by this scale */
    double yscale;              /* scale in x dimension */
    double xscale;              /* scale in y dimension */
    int count, alloc;           /* numer of parts */
    SYMBPART **part;            /* objects ( parts ) */
} SYMBOL;

#include <grass/defs/symbol.h>

#endif