| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkHalf_DEFINED |
| #define SkHalf_DEFINED |
| |
| #include "SkTypes.h" |
| |
| // 16-bit floating point value |
| // format is 1 bit sign, 5 bits exponent, 10 bits mantissa |
| // only used for storage |
| typedef uint16_t SkHalf; |
| |
| #define SK_HalfMin 0x0400 // 2^-24 (minimum positive normal value) |
| #define SK_HalfMax 0x7bff // 65504 |
| #define SK_HalfEpsilon 0x1400 // 2^-10 |
| |
| // convert between half and single precision floating point |
| float SkHalfToFloat(SkHalf h); |
| SkHalf SkFloatToHalf(float f); |
| |
| #endif |
