| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| // This only supports a 2-color single interval so it is a simple linear interpolation between the |
| // two end points based on t. But it serves as a good test for connecting all of the plumbing into a |
| // functional gradient shader. |
| |
| layout(ctype=SkPMColor4f, tracked) in uniform half4 start; |
| layout(ctype=SkPMColor4f, tracked) in uniform half4 end; |
| |
| void main() { |
| half t = sk_InColor.x; |
| |
| // Clamping and/or wrapping was already handled by the parent shader so the output color is a |
| // simple lerp. |
| sk_OutColor = (1 - t) * start + t * end; |
| } |
