bgfx/3rdparty/glsl-optimizer/tests/fragment/zun-Hidden_Shadow-ScreenBlur-in.txt

float xll_saturate( float x) {
  return clamp( x, 0.0, 1.0);
}
vec2 xll_saturate( vec2 x) {
  return clamp( x, 0.0, 1.0);
}
vec3 xll_saturate( vec3 x) {
  return clamp( x, 0.0, 1.0);
}
vec4 xll_saturate( vec4 x) {
  return clamp( x, 0.0, 1.0);
}
mat2 xll_saturate(mat2 m) {
  return mat2( clamp(m[0], 0.0, 1.0), clamp(m[1], 0.0, 1.0));
}
mat3 xll_saturate(mat3 m) {
  return mat3( clamp(m[0], 0.0, 1.0), clamp(m[1], 0.0, 1.0), clamp(m[2], 0.0, 1.0));
}
mat4 xll_saturate(mat4 m) {
  return mat4( clamp(m[0], 0.0, 1.0), clamp(m[1], 0.0, 1.0), clamp(m[2], 0.0, 1.0), clamp(m[3], 0.0, 1.0));
}
struct v2f_vertex_lit {
    vec2 uv;
    vec4 diff;
    vec4 spec;
};
struct v2f_img {
    vec4 pos;
    vec2 uv;
};
struct appdata_img {
    vec4 vertex;
    vec2 texcoord;
};
uniform vec4 _BlurOffsets[8];
uniform sampler2D _MainTex;
uniform vec4 unity_ShadowBlurParams;
vec4 frag( in v2f_img i );
vec4 frag( in v2f_img i ) {
    vec4 coord;
    vec4 mask;
    float dist;
    float radius;
    float diffTolerance;
    int i_1 = 0;
    vec4 sample;
    float sampleDist;
    float diff;
    float shadow;
    coord = vec4( i.uv, 0.000000, 0.000000);
    mask = texture2D( _MainTex, coord.xy );
    dist = (mask.z  + (mask.w  / 255.000));
    radius = xll_saturate( (unity_ShadowBlurParams.y  / (1.00000 - dist)) );
    diffTolerance = unity_ShadowBlurParams.x ;
    mask.xy  *= diffTolerance;
    for ( ; (i_1 < 8); ( i_1++ )) {
        sample = texture2D( _MainTex, (coord + (radius * _BlurOffsets[ i_1 ])).xy );
        sampleDist = (sample.z  + (sample.w  / 255.000));
        diff = (dist - sampleDist);
        diff = xll_saturate( (diffTolerance - abs( diff )) );
        mask.xy  += (diff * sample.xy );
    }
    shadow = (mask.x  / mask.y );
    return vec4( shadow);
}
void main() {
    vec4 xl_retval;
    v2f_img xlt_i;
    xlt_i.pos = vec4(0.0);
    xlt_i.uv = vec2( gl_TexCoord[0]);
    xl_retval = frag( xlt_i);
    gl_FragData[0] = vec4( xl_retval);
}