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GLSL
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#version 310 es
precision mediump float;
precision highp int;
layout(location = 0) out vec4 FragColor;
layout(location = 0) in vec4 vIn;
layout(location = 1) flat in mediump ivec4 vIn1;
void main()
{
FragColor = -(-vIn);
mediump ivec4 a = ~(~vIn1);
bool b = false;
b = !(!b);
}