| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #ifndef SkPerlinNoiseShaderType_DEFINED |
| #define SkPerlinNoiseShaderType_DEFINED |
| |
| /** |
| * About the noise types : the difference between the first two is just minor tweaks to the |
| * algorithm; they're not two entirely different noises. The output looks different, but once the |
| * noise is generated in the [1, -1] range, the output is brought back in the [0, 1] range by doing: |
| * kFractalNoise : noise * 0.5 + 0.5 |
| * kTurbulence : abs(noise) |
| * Very little differs between the two types, although you can tell the difference visually. |
| */ |
| enum class SkPerlinNoiseShaderType { kFractalNoise, kTurbulence, kLast = kTurbulence }; |
| |
| #endif |
