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

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 sampler2D _CameraDepthTexture;
uniform sampler2D _MainTex;
uniform vec4 _ZBufferParams;
float LinearEyeDepth( in float z );
vec4 frag( in v2f_img i );
float LinearEyeDepth( in float z ) {
    return (1.00000 / ((_ZBufferParams.z  * z) + _ZBufferParams.w ));
}
vec4 frag( in v2f_img i ) {
    vec4 tex;
    vec4 depth;
    float z;
    vec4 col;
    tex = texture2D( _MainTex, i.uv);
    depth = texture2D( _CameraDepthTexture, i.uv);
    z = (LinearEyeDepth( depth.x ) * 0.0100000);
    col = tex;
    col.xy  = vec2( z);
    return col;
}
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);
}