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 16 typedef 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 23 float SkHalfToFloat(SkHalf h); 24 SkHalf SkFloatToHalf(float f); 25 26 #endif 27
