1### Compilation failed: 2 3error: 1: invalid type 4layout(binding=0) uniform sampler2D t; 5^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 6error: 2: 'main' must return: 'vec4', 'float4', or 'half4' 7void main() 8^^^^^^^^^^^ 9error: 4: unknown identifier 'sample' 10 half4 c = sample(t, half2(0)); 11 ^^^^^^ 12error: 5: unknown identifier 'sk_FragColor' 13 sk_FragColor = c * sample(t, half3(1)); 14 ^^^^^^^^^^^^ 15error: 5: unknown identifier 'c' 16 sk_FragColor = c * sample(t, half3(1)); 17 ^ 18error: 5: unknown identifier 'sample' 19 sk_FragColor = c * sample(t, half3(1)); 20 ^^^^^^ 216 errors 22