| OLD | NEW |
|---|
| 1 /* | 1 /* |
| 2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
| 6 */ | 6 */ |
| 7 | 7 |
| 8 #ifndef SkHalf_DEFINED | 8 #ifndef SkHalf_DEFINED |
| 9 #define SkHalf_DEFINED | 9 #define SkHalf_DEFINED |
| 10 | 10 |
| 11 #include "SkTypes.h" | 11 #include "SkTypes.h" |
| 12 | 12 |
| 13 // 16-bit floating point value | 13 // 16-bit floating point value |
| 14 // format is 1 bit sign, 5 bits exponent, 10 bits mantissa | 14 // format is 1 bit sign, 5 bits exponent, 10 bits mantissa |
| 15 // only used for storage | 15 // only used for storage |
| 16 typedef uint16_t SkHalf; | 16 typedef uint16_t SkHalf; |
| 17 | 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 |
| 18 // convert between half and single precision floating point | 22 // convert between half and single precision floating point |
| 19 float SkHalfToFloat(SkHalf h); | 23 float SkHalfToFloat(SkHalf h); |
| 20 SkHalf SkFloatToHalf(float f); | 24 SkHalf SkFloatToHalf(float f); |
| 21 | 25 |
| 22 #endif | 26 #endif |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 762923003:
Add support for half float alpha textures. (Closed)
Base URL: https://skia.googlesource.com/skia.git@master