1/* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#ifndef SkHalf_DEFINED 9#define SkHalf_DEFINED 10 11#include "SkTypes.h" 12 13// 16-bit floating point value 14// format is 1 bit sign, 5 bits exponent, 10 bits mantissa 15// only used for storage 16typedef uint16_t SkHalf; 17 18#define SK_HalfMin 0x0400 // 2^-24 (minimum positive normal value) 19#define SK_HalfMax 0x7bff // 65504 20#define SK_HalfEpsilon 0x1400 // 2^-10 21 22// convert between half and single precision floating point 23float SkHalfToFloat(SkHalf h); 24SkHalf SkFloatToHalf(float f); 25 26#endif 27