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//========================================================================
//
// SplashMath.h
//
//========================================================================
#ifndef SPLASHMATH_H
#define SPLASHMATH_H
#include <aconf.h>
#if USE_FIXEDPOINT
#include "FixedPoint.h"
#else
#include <math.h>
#endif
#include "SplashTypes.h"
static inline SplashCoord splashAbs(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::abs(x);
#else
return fabs(x);
#endif
}
static inline int splashFloor(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::floor(x);
#else
return (int)floor(x);
#endif
}
static inline int splashCeil(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::ceil(x);
#else
return (int)ceil(x);
#endif
}
static inline int splashRound(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::round(x);
#else
return (int)floor(x + 0.5);
#endif
}
static inline SplashCoord splashSqrt(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::sqrt(x);
#else
return sqrt(x);
#endif
}
static inline SplashCoord splashPow(SplashCoord x, SplashCoord y) {
#if USE_FIXEDPOINT
return FixedPoint::pow(x, y);
#else
return pow(x, y);
#endif
}
static inline SplashCoord splashDist(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1) {
SplashCoord dx, dy;
dx = x1 - x0;
dy = y1 - y0;
#if USE_FIXEDPOINT
// this handles the situation where dx*dx or dy*dy is too large to
// fit in the 16.16 fixed point format
SplashCoord dxa, dya;
dxa = splashAbs(dx);
dya = splashAbs(dy);
if (dxa == 0 && dya == 0) {
return 0;
} else if (dxa > dya) {
return dxa * FixedPoint::sqrt(dya / dxa + 1);
} else {
return dya * FixedPoint::sqrt(dxa / dya + 1);
}
#else
return sqrt(dx * dx + dy * dy);
#endif
}
#endif
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