1### Compilation failed: 2 3error: 2: variables of type 'uint' may not be uniform 4uniform uint b; 5^^^^^^^^^^^^^^ 6error: 3: 'main' must return: 'vec4', 'float4', or 'half4' 7void main() { 8^^^^^^^^^^^ 9error: 4: unknown identifier 'sk_FragColor' 10 sk_FragColor.x = half(findMSB(a)); 11 ^^^^^^^^^^^^ 12error: 4: unknown identifier 'findMSB' 13 sk_FragColor.x = half(findMSB(a)); 14 ^^^^^^^ 15error: 5: unknown identifier 'sk_FragColor' 16 sk_FragColor.y = half(findMSB(b)); 17 ^^^^^^^^^^^^ 18error: 5: unknown identifier 'findMSB' 19 sk_FragColor.y = half(findMSB(b)); 20 ^^^^^^^ 216 errors 22