| ### Compilation failed: | |
| error: 1: 'main' must return: 'vec4', 'float4', or 'half4' | |
| void main() { sk_FragColor.xy = half2(sk_FragCoord.xy); } | |
| ^^^^^^^^^^^ | |
| error: 1: unknown identifier 'sk_FragColor' | |
| void main() { sk_FragColor.xy = half2(sk_FragCoord.xy); } | |
| ^^^^^^^^^^^^ | |
| 2 errors |