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