2012-04-19 14:35:52 +08:00
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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#ifdef SK_CAN_USE_FLOAT
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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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// If math.h had powf(float, float), I could remove this wrapper
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static inline float sk_float_pow(float base, float exp) {
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return static_cast<float>(pow(static_cast<double>(base),
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static_cast<double>(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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#define sk_float_isNaN(x) _isnan(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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#endif
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#endif
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