1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkFloatingPoint_DEFINED 11 #define SkFloatingPoint_DEFINED 12 13 #include "SkTypes.h" 14 15 #include <math.h> 16 #include <float.h> 17 #include "SkFloatBits.h" 18 19 // C++98 cmath std::pow seems to be the earliest portable way to get float pow. 20 // However, on Linux including cmath undefines isfinite. 21 // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14608 22 static inline float sk_float_pow(float base, float exp) { 23 return powf(base, exp); 24 } 25 26 static inline float sk_float_copysign(float x, float y) { 27 int32_t xbits = SkFloat2Bits(x); 28 int32_t ybits = SkFloat2Bits(y); 29 return SkBits2Float((xbits & 0x7FFFFFFF) | (ybits & 0x80000000)); 30 } 31 32 #ifdef SK_BUILD_FOR_WINCE 33 #define sk_float_sqrt(x) (float)::sqrt(x) 34 #define sk_float_sin(x) (float)::sin(x) 35 #define sk_float_cos(x) (float)::cos(x) 36 #define sk_float_tan(x) (float)::tan(x) 37 #define sk_float_acos(x) (float)::acos(x) 38 #define sk_float_asin(x) (float)::asin(x) 39 #define sk_float_atan2(y,x) (float)::atan2(y,x) 40 #define sk_float_abs(x) (float)::fabs(x) 41 #define sk_float_mod(x,y) (float)::fmod(x,y) 42 #define sk_float_exp(x) (float)::exp(x) 43 #define sk_float_log(x) (float)::log(x) 44 #define sk_float_floor(x) (float)::floor(x) 45 #define sk_float_ceil(x) (float)::ceil(x) 46 #else 47 #define sk_float_sqrt(x) sqrtf(x) 48 #define sk_float_sin(x) sinf(x) 49 #define sk_float_cos(x) cosf(x) 50 #define sk_float_tan(x) tanf(x) 51 #define sk_float_floor(x) floorf(x) 52 #define sk_float_ceil(x) ceilf(x) 53 #ifdef SK_BUILD_FOR_MAC 54 #define sk_float_acos(x) static_cast<float>(acos(x)) 55 #define sk_float_asin(x) static_cast<float>(asin(x)) 56 #else 57 #define sk_float_acos(x) acosf(x) 58 #define sk_float_asin(x) asinf(x) 59 #endif 60 #define sk_float_atan2(y,x) atan2f(y,x) 61 #define sk_float_abs(x) fabsf(x) 62 #define sk_float_mod(x,y) fmodf(x,y) 63 #define sk_float_exp(x) expf(x) 64 #define sk_float_log(x) logf(x) 65 #endif 66 67 #ifdef SK_BUILD_FOR_WIN 68 #define sk_float_isfinite(x) _finite(x) 69 #define sk_float_isnan(x) _isnan(x) 70 static inline int sk_float_isinf(float x) { 71 int32_t bits = SkFloat2Bits(x); 72 return (bits << 1) == (0xFF << 24); 73 } 74 #else 75 #define sk_float_isfinite(x) isfinite(x) 76 #define sk_float_isnan(x) isnan(x) 77 #define sk_float_isinf(x) isinf(x) 78 #endif 79 80 #define sk_double_isnan(a) sk_float_isnan(a) 81 82 #ifdef SK_USE_FLOATBITS 83 #define sk_float_floor2int(x) SkFloatToIntFloor(x) 84 #define sk_float_round2int(x) SkFloatToIntRound(x) 85 #define sk_float_ceil2int(x) SkFloatToIntCeil(x) 86 #else 87 #define sk_float_floor2int(x) (int)sk_float_floor(x) 88 #define sk_float_round2int(x) (int)sk_float_floor((x) + 0.5f) 89 #define sk_float_ceil2int(x) (int)sk_float_ceil(x) 90 #endif 91 92 extern const uint32_t gIEEENotANumber; 93 extern const uint32_t gIEEEInfinity; 94 extern const uint32_t gIEEENegativeInfinity; 95 96 #define SK_FloatNaN (*SkTCast<const float*>(&gIEEENotANumber)) 97 #define SK_FloatInfinity (*SkTCast<const float*>(&gIEEEInfinity)) 98 #define SK_FloatNegativeInfinity (*SkTCast<const float*>(&gIEEENegativeInfinity)) 99 #endif 100
