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98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkFloatingPoint_DEFINED
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#define SkFloatingPoint_DEFINED
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#include "SkTypes.h"
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#include <math.h>
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#include <float.h>
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#include "SkFloatBits.h"
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// C++98 cmath std::pow seems to be the earliest portable way to get float pow.
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// However, on Linux including cmath undefines isfinite.
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// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14608
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static inline float sk_float_pow(float base, float exp) {
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return powf(base, exp);
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}
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static inline float sk_float_copysign(float x, float y) {
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int32_t xbits = SkFloat2Bits(x);
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int32_t ybits = SkFloat2Bits(y);
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return SkBits2Float((xbits & 0x7FFFFFFF) | (ybits & 0x80000000));
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}
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#ifdef SK_BUILD_FOR_WINCE
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#define sk_float_sqrt(x) (float)::sqrt(x)
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#define sk_float_sin(x) (float)::sin(x)
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#define sk_float_cos(x) (float)::cos(x)
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#define sk_float_tan(x) (float)::tan(x)
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#define sk_float_acos(x) (float)::acos(x)
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#define sk_float_asin(x) (float)::asin(x)
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#define sk_float_atan2(y,x) (float)::atan2(y,x)
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#define sk_float_abs(x) (float)::fabs(x)
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#define sk_float_mod(x,y) (float)::fmod(x,y)
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#define sk_float_exp(x) (float)::exp(x)
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#define sk_float_log(x) (float)::log(x)
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#define sk_float_floor(x) (float)::floor(x)
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#define sk_float_ceil(x) (float)::ceil(x)
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#else
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#define sk_float_sqrt(x) sqrtf(x)
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#define sk_float_sin(x) sinf(x)
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#define sk_float_cos(x) cosf(x)
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#define sk_float_tan(x) tanf(x)
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#define sk_float_floor(x) floorf(x)
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#define sk_float_ceil(x) ceilf(x)
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#ifdef SK_BUILD_FOR_MAC
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#define sk_float_acos(x) static_cast<float>(acos(x))
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#define sk_float_asin(x) static_cast<float>(asin(x))
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#else
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#define sk_float_acos(x) acosf(x)
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#define sk_float_asin(x) asinf(x)
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#endif
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#define sk_float_atan2(y,x) atan2f(y,x)
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#define sk_float_abs(x) fabsf(x)
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#define sk_float_mod(x,y) fmodf(x,y)
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#define sk_float_exp(x) expf(x)
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#define sk_float_log(x) logf(x)
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#endif
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#ifdef SK_BUILD_FOR_WIN
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#define sk_float_isfinite(x) _finite(x)
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#define sk_float_isnan(x) _isnan(x)
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static inline int sk_float_isinf(float x) {
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int32_t bits = SkFloat2Bits(x);
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return (bits << 1) == (0xFF << 24);
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}
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#else
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#define sk_float_isfinite(x) isfinite(x)
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#define sk_float_isnan(x) isnan(x)
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#define sk_float_isinf(x) isinf(x)
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#endif
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#ifdef SK_USE_FLOATBITS
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#define sk_float_floor2int(x) SkFloatToIntFloor(x)
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#define sk_float_round2int(x) SkFloatToIntRound(x)
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#define sk_float_ceil2int(x) SkFloatToIntCeil(x)
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#else
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#define sk_float_floor2int(x) (int)sk_float_floor(x)
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#define sk_float_round2int(x) (int)sk_float_floor((x) + 0.5f)
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#define sk_float_ceil2int(x) (int)sk_float_ceil(x)
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#endif
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extern const uint32_t gIEEENotANumber;
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extern const uint32_t gIEEEInfinity;
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extern const uint32_t gIEEENegativeInfinity;
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#define SK_FloatNaN (*SkTCast<const float*>(&gIEEENotANumber))
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#define SK_FloatInfinity (*SkTCast<const float*>(&gIEEEInfinity))
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#define SK_FloatNegativeInfinity (*SkTCast<const float*>(&gIEEENegativeInfinity))
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#endif
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