bgfx/3rdparty/glsl-optimizer/tests/fragment/bug-loop-undeclaredinductor-inES3.txt

#version 300 es

// from case 685794 at Unity; a particular form of a loop
// started to generate invalid shaders around Unity 4.6.3.

out mediump vec4 _fragData;


struct v2f_surf {
    mediump vec2 uv;
    highp vec4 pos;
};
uniform sampler2D _MainTex;
uniform mediump float _NumPasses;
uniform mediump vec4 _ContrastShift;
uniform mediump vec4 _SaturationShift;
uniform lowp vec4 _HueShift;
uniform lowp vec4 _LuminosityShift;

lowp vec3 TestCycle2( in lowp vec3 res, in mediump float val )
{
    return ((res - 0.5) * pow( (cos(val) + 1.0), val));
}

lowp vec3 TestCycle( in lowp vec3 rgb, in mediump float passes )
{
    lowp vec3 res = rgb;
    // a weird form of loop that was causing a bug
    highp float i = 0.0;
    for ( ; (i < 4.0); i += 1.0) {
       
        if ((i == passes)){
            break;
        }
        if ((i == 0.0)){
            res = TestCycle2( res, ((_ContrastShift.x * 3.0) + 12.0));
        }
        else{
            if ((i == 1.0)){
                res = TestCycle2( res, ((_SaturationShift.y * 3.0) + 12.0));
            }
            else{
                if ((i == 2.0)){
                    res = TestCycle2( res, ((_HueShift.z * 3.0) + 12.0));
                }
                else{
                    res = TestCycle2( res, ((_LuminosityShift.x * 3.0) + 12.0));
                }
            }
        }
    }
   
    return res;
}

lowp vec3 surf( in mediump vec2 uv )
{   
    lowp vec4 t = texture(_MainTex, uv);
    if (_NumPasses > 0.0)
        t.xyz = TestCycle(t.xyz, _NumPasses);
    return t.xyz;
}

lowp vec4 frag_surf( in v2f_surf IN )
{   
    lowp vec3 col = surf( IN.uv);
    return vec4( col, 1.0);
}
in mediump vec2 xlv_TEXCOORD0;
void main() {
    lowp vec4 xl_retval;
    v2f_surf xlt_IN;
    xlt_IN.uv = vec2(xlv_TEXCOORD0);
    xlt_IN.pos = vec4(0.0);
    xl_retval = frag_surf(xlt_IN);
    _fragData = vec4(xl_retval);
}