source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.12.0/mifpoly.h@ 78293

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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

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Permission to use, copy, modify, and distribute this software and its 
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provided that the above copyright notice appear in all copies and that
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#ifndef __MIFPOLY_H__
#define __MIFPOLY_H__

#include <X11/Xfuncproto.h>

#define EPSILON 0.000001
#define ISEQUAL(a,b) (fabs((a) - (b)) <= EPSILON)
#define UNEQUAL(a,b) (fabs((a) - (b)) > EPSILON)
#define WITHINHALF(a, b) (((a) - (b) > 0.0) ? (a) - (b) < 0.5 : \
                                             (b) - (a) <= 0.5)
#define ROUNDTOINT(x)   ((int) (((x) > 0.0) ? ((x) + 0.5) : ((x) - 0.5)))
#define ISZERO(x)       (fabs((x)) <= EPSILON)
#define PTISEQUAL(a,b) (ISEQUAL(a.x,b.x) && ISEQUAL(a.y,b.y))
#define PTUNEQUAL(a,b) (UNEQUAL(a.x,b.x) || UNEQUAL(a.y,b.y))
#define PtEqual(a, b) (((a).x == (b).x) && ((a).y == (b).y))

#define NotEnd          0
#define FirstEnd        1
#define SecondEnd       2

#define SQSECANT 108.856472512142 /* 1/sin^2(11/2) - for 11o miter cutoff */
#define D2SECANT 5.21671526231167 /* 1/2*sin(11/2) - max extension per width */

static _X_INLINE int ICEIL(double x)
{
    int _cTmp = x;
    return ((x == _cTmp) || (x < 0.0)) ? _cTmp : _cTmp+1;
}

/* Point with sub-pixel positioning.  In this case we use doubles, but
 * see mifpolycon.c for other suggestions 
 */
typedef struct _SppPoint {
        double  x, y;
} SppPointRec, *SppPointPtr;

typedef struct _SppArc {
        double  x, y, width, height;
        double  angle1, angle2;
} SppArcRec, *SppArcPtr;

/* mifpolycon.c */

extern _X_EXPORT void miFillSppPoly(
    DrawablePtr /*dst*/,
    GCPtr /*pgc*/,
    int /*count*/,
    SppPointPtr /*ptsIn*/,
    int /*xTrans*/,
    int /*yTrans*/,
    double /*xFtrans*/,
    double /*yFtrans*/
);

#endif /* __MIFPOLY_H__ */