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| 1 | 1 |
| 2 /* | 2 /* |
| 3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
| 4 * | 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
| 7 */ | 7 */ |
| 8 | 8 |
| 9 | 9 |
| 10 #ifndef SkFloatingPoint_DEFINED | 10 #ifndef SkFloatingPoint_DEFINED |
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| 49 return (float)_copysign(x, y); | 49 return (float)_copysign(x, y); |
| 50 | 50 |
| 51 // Otherwise convert to bits and extract sign. | 51 // Otherwise convert to bits and extract sign. |
| 52 #else | 52 #else |
| 53 int32_t xbits = SkFloat2Bits(x); | 53 int32_t xbits = SkFloat2Bits(x); |
| 54 int32_t ybits = SkFloat2Bits(y); | 54 int32_t ybits = SkFloat2Bits(y); |
| 55 return SkBits2Float((xbits & 0x7FFFFFFF) | (ybits & 0x80000000)); | 55 return SkBits2Float((xbits & 0x7FFFFFFF) | (ybits & 0x80000000)); |
| 56 #endif | 56 #endif |
| 57 } | 57 } |
| 58 | 58 |
| 59 #ifdef SK_BUILD_FOR_WINCE | 59 #define sk_float_sqrt(x) sqrtf(x) |
| 60 #define sk_float_sqrt(x) (float)::sqrt(x) | 60 #define sk_float_sin(x) sinf(x) |
| 61 #define sk_float_sin(x) (float)::sin(x) | 61 #define sk_float_cos(x) cosf(x) |
| 62 #define sk_float_cos(x) (float)::cos(x) | 62 #define sk_float_tan(x) tanf(x) |
| 63 #define sk_float_tan(x) (float)::tan(x) | 63 #define sk_float_floor(x) floorf(x) |
| 64 #define sk_float_acos(x) (float)::acos(x) | 64 #define sk_float_ceil(x) ceilf(x) |
| 65 #define sk_float_asin(x) (float)::asin(x) | 65 #ifdef SK_BUILD_FOR_MAC |
| 66 #define sk_float_atan2(y,x) (float)::atan2(y,x) | 66 # define sk_float_acos(x) static_cast<float>(acos(x)) |
| 67 #define sk_float_abs(x) (float)::fabs(x) | 67 # define sk_float_asin(x) static_cast<float>(asin(x)) |
| 68 #define sk_float_mod(x,y) (float)::fmod(x,y) | |
| 69 #define sk_float_exp(x) (float)::exp(x) | |
| 70 #define sk_float_log(x) (float)::log(x) | |
| 71 #define sk_float_floor(x) (float)::floor(x) | |
| 72 #define sk_float_ceil(x) (float)::ceil(x) | |
| 73 #else | 68 #else |
| 74 #define sk_float_sqrt(x) sqrtf(x) | 69 # define sk_float_acos(x) acosf(x) |
| 75 #define sk_float_sin(x) sinf(x) | 70 # define sk_float_asin(x) asinf(x) |
| 76 #define sk_float_cos(x) cosf(x) | |
| 77 #define sk_float_tan(x) tanf(x) | |
| 78 #define sk_float_floor(x) floorf(x) | |
| 79 #define sk_float_ceil(x) ceilf(x) | |
| 80 #ifdef SK_BUILD_FOR_MAC | |
| 81 #define sk_float_acos(x) static_cast<float>(acos(x)) | |
| 82 #define sk_float_asin(x) static_cast<float>(asin(x)) | |
| 83 #else | |
| 84 #define sk_float_acos(x) acosf(x) | |
| 85 #define sk_float_asin(x) asinf(x) | |
| 86 #endif | 71 #endif |
| 87 #define sk_float_atan2(y,x) atan2f(y,x) | 72 #define sk_float_atan2(y,x) atan2f(y,x) |
| 88 #define sk_float_abs(x) fabsf(x) | 73 #define sk_float_abs(x) fabsf(x) |
| 89 #define sk_float_mod(x,y) fmodf(x,y) | 74 #define sk_float_mod(x,y) fmodf(x,y) |
| 90 #define sk_float_exp(x) expf(x) | 75 #define sk_float_exp(x) expf(x) |
| 91 #define sk_float_log(x) logf(x) | 76 #define sk_float_log(x) logf(x) |
| 92 #endif | |
| 93 | 77 |
| 94 #define sk_float_round(x) sk_float_floor((x) + 0.5f) | 78 #define sk_float_round(x) sk_float_floor((x) + 0.5f) |
| 95 | 79 |
| 96 // can't find log2f on android, but maybe that just a tool bug? | 80 // can't find log2f on android, but maybe that just a tool bug? |
| 97 #ifdef SK_BUILD_FOR_ANDROID | 81 #ifdef SK_BUILD_FOR_ANDROID |
| 98 static inline float sk_float_log2(float x) { | 82 static inline float sk_float_log2(float x) { |
| 99 const double inv_ln_2 = 1.44269504088896; | 83 const double inv_ln_2 = 1.44269504088896; |
| 100 return (float)(log(x) * inv_ln_2); | 84 return (float)(log(x) * inv_ln_2); |
| 101 } | 85 } |
| 102 #else | 86 #else |
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| 171 float estimate = *SkTCast<float*>(&i); | 155 float estimate = *SkTCast<float*>(&i); |
| 172 | 156 |
| 173 // One step of Newton's method to refine. | 157 // One step of Newton's method to refine. |
| 174 const float estimate_sq = estimate*estimate; | 158 const float estimate_sq = estimate*estimate; |
| 175 estimate *= 0.703952253f*(2.38924456f-x*estimate_sq); | 159 estimate *= 0.703952253f*(2.38924456f-x*estimate_sq); |
| 176 return estimate; | 160 return estimate; |
| 177 #endif | 161 #endif |
| 178 } | 162 } |
| 179 | 163 |
| 180 #endif | 164 #endif |
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