|  | #version 310 es | 
|  | #extension GL_OES_sample_variables : require | 
|  | precision mediump float; | 
|  |  | 
|  | struct FragmentInputs { | 
|  | vec4 position; | 
|  | bool front_facing; | 
|  | uint sample_index; | 
|  | uint sample_mask; | 
|  | }; | 
|  |  | 
|  | void tint_symbol(FragmentInputs inputs) { | 
|  | if (inputs.front_facing) { | 
|  | vec4 foo = inputs.position; | 
|  | uint bar = (inputs.sample_index + inputs.sample_mask); | 
|  | } | 
|  | } | 
|  |  | 
|  | void main() { | 
|  | FragmentInputs tint_symbol_1 = FragmentInputs(gl_FragCoord, gl_FrontFacing, uint(gl_SampleID), uint(gl_SampleMaskIn[0])); | 
|  | tint_symbol(tint_symbol_1); | 
|  | return; | 
|  | } |