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Diffstat (limited to 'Build/source/libs/poppler/poppler-0.37.0/splash/SplashMath.h')
| -rw-r--r-- | Build/source/libs/poppler/poppler-0.37.0/splash/SplashMath.h | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/Build/source/libs/poppler/poppler-0.37.0/splash/SplashMath.h b/Build/source/libs/poppler/poppler-0.37.0/splash/SplashMath.h new file mode 100644 index 00000000000..ca73c2bd1f3 --- /dev/null +++ b/Build/source/libs/poppler/poppler-0.37.0/splash/SplashMath.h @@ -0,0 +1,245 @@ +//======================================================================== +// +// SplashMath.h +// +//======================================================================== + +//======================================================================== +// +// Modified under the Poppler project - http://poppler.freedesktop.org +// +// All changes made under the Poppler project to this file are licensed +// under GPL version 2 or later +// +// Copyright (C) 2009-2011 Albert Astals Cid <aacid@kde.org> +// +// To see a description of the changes please see the Changelog file that +// came with your tarball or type make ChangeLog if you are building from git +// +//======================================================================== + +#ifndef SPLASHMATH_H +#define SPLASHMATH_H + +#include "poppler-config.h" + +#if USE_FIXEDPOINT +#include "goo/FixedPoint.h" +#else +#include <math.h> +#endif +#include "SplashTypes.h" + +static inline SplashCoord splashAbs(SplashCoord x) { +#if USE_FIXEDPOINT + return FixedPoint::abs(x); +#elif USE_FLOAT + return fabsf(x); +#else + return fabs(x); +#endif +} + +static inline int splashFloor(SplashCoord x) { + #if USE_FIXEDPOINT + return FixedPoint::floor(x); + #elif USE_FLOAT + return (int)floorf(x); + #elif __GNUC__ && __i386__ + // floor() and (int)() are implemented separately, which results + // in changing the FPCW multiple times - so we optimize it with + // some inline assembly + Gushort oldCW, newCW, t; + int result; + + __asm__ volatile("fldl %4\n" + "fnstcw %0\n" + "movw %0, %3\n" + "andw $0xf3ff, %3\n" + "orw $0x0400, %3\n" + "movw %3, %1\n" // round down + "fldcw %1\n" + "fistpl %2\n" + "fldcw %0\n" + : "=m" (oldCW), "=m" (newCW), "=m" (result), "=r" (t) + : "m" (x)); + return result; + #elif defined(WIN32) && defined(_M_IX86) + // floor() and (int)() are implemented separately, which results + // in changing the FPCW multiple times - so we optimize it with + // some inline assembly + Gushort oldCW, newCW; + int result; + + __asm fld QWORD PTR x + __asm fnstcw WORD PTR oldCW + __asm mov ax, WORD PTR oldCW + __asm and ax, 0xf3ff + __asm or ax, 0x0400 + __asm mov WORD PTR newCW, ax // round down + __asm fldcw WORD PTR newCW + __asm fistp DWORD PTR result + __asm fldcw WORD PTR oldCW + return result; + #else + if (x > 0) return (int)x; + else return (int)floor(x); + #endif +} + +static inline int splashCeil(SplashCoord x) { +#if USE_FIXEDPOINT + return FixedPoint::ceil(x); +#elif USE_FLOAT + return (int)ceilf(x); +#elif __GNUC__ && __i386__ + // ceil() and (int)() are implemented separately, which results + // in changing the FPCW multiple times - so we optimize it with + // some inline assembly + Gushort oldCW, newCW, t; + int result; + + __asm__ volatile("fldl %4\n" + "fnstcw %0\n" + "movw %0, %3\n" + "andw $0xf3ff, %3\n" + "orw $0x0800, %3\n" + "movw %3, %1\n" // round up + "fldcw %1\n" + "fistpl %2\n" + "fldcw %0\n" + : "=m" (oldCW), "=m" (newCW), "=m" (result), "=r" (t) + : "m" (x)); + return result; +#elif defined(WIN32) && defined(_M_IX86) + // ceil() and (int)() are implemented separately, which results + // in changing the FPCW multiple times - so we optimize it with + // some inline assembly + Gushort oldCW, newCW; + int result; + + __asm fld QWORD PTR x + __asm fnstcw WORD PTR oldCW + __asm mov ax, WORD PTR oldCW + __asm and ax, 0xf3ff + __asm or ax, 0x0800 + __asm mov WORD PTR newCW, ax // round up + __asm fldcw WORD PTR newCW + __asm fistp DWORD PTR result + __asm fldcw WORD PTR oldCW + return result; +#else + return (int)ceil(x); +#endif +} + +static inline int splashRound(SplashCoord x) { +#if USE_FIXEDPOINT + return FixedPoint::round(x); +#elif __GNUC__ && __i386__ + // this could use round-to-nearest mode and avoid the "+0.5", + // but that produces slightly different results (because i+0.5 + // sometimes rounds up and sometimes down using the even rule) + Gushort oldCW, newCW, t; + int result; + + x += 0.5; + __asm__ volatile("fldl %4\n" + "fnstcw %0\n" + "movw %0, %3\n" + "andw $0xf3ff, %3\n" + "orw $0x0400, %3\n" + "movw %3, %1\n" // round down + "fldcw %1\n" + "fistpl %2\n" + "fldcw %0\n" + : "=m" (oldCW), "=m" (newCW), "=m" (result), "=r" (t) + : "m" (x)); + return result; +#elif defined(WIN32) && defined(_M_IX86) + // this could use round-to-nearest mode and avoid the "+0.5", + // but that produces slightly different results (because i+0.5 + // sometimes rounds up and sometimes down using the even rule) + Gushort oldCW, newCW; + int result; + + x += 0.5; + __asm fld QWORD PTR x + __asm fnstcw WORD PTR oldCW + __asm mov ax, WORD PTR oldCW + __asm and ax, 0xf3ff + __asm or ax, 0x0400 + __asm mov WORD PTR newCW, ax // round down + __asm fldcw WORD PTR newCW + __asm fistp DWORD PTR result + __asm fldcw WORD PTR oldCW + return result; +#else + return (int)splashFloor(x + 0.5); +#endif +} + +static inline SplashCoord splashAvg(SplashCoord x, SplashCoord y) { +#if USE_FIXEDPOINT + return FixedPoint::avg(x, y); +#else + return 0.5 * (x + y); +#endif +} + +static inline SplashCoord splashSqrt(SplashCoord x) { +#if USE_FIXEDPOINT + return FixedPoint::sqrt(x); +#elif USE_FLOAT + return sqrtf(x); +#else + return sqrt(x); +#endif +} + +static inline SplashCoord splashPow(SplashCoord x, SplashCoord y) { +#if USE_FIXEDPOINT + return FixedPoint::pow(x, y); +#elif USE_FLOAT + return powf(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, d; + dxa = splashAbs(dx); + dya = splashAbs(dy); + if (dxa == 0 && dya == 0) { + return 0; + } else if (dxa > dya) { + d = dya / dxa; + return dxa * FixedPoint::sqrt(d*d + 1); + } else { + d = dxa / dya; + return dya * FixedPoint::sqrt(d*d + 1); + } +#else + return splashSqrt(dx * dx + dy * dy); +#endif +} + +static inline GBool splashCheckDet(SplashCoord m11, SplashCoord m12, + SplashCoord m21, SplashCoord m22, + SplashCoord epsilon) { +#if USE_FIXEDPOINT + return FixedPoint::checkDet(m11, m12, m21, m22, epsilon); +#else + return fabs(m11 * m22 - m12 * m21) >= epsilon; +#endif +} + +#endif |