| // Copyright 2013 The Flutter Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| uniform FragInfo { | |
| vec4 color; | |
| float square_size; | |
| } | |
| frag_info; | |
| out vec4 frag_color; | |
| void main() { | |
| vec2 square = floor(gl_FragCoord.xy / frag_info.square_size); | |
| frag_color = mod(square.x + square.y, 2.0) * frag_info.color; | |
| } |