bgfx/3rdparty/glsl-optimizer/tests/fragment/zun-Hidden_ShowDepthNTexture-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 _CameraDepthNormalsTexture;
uniform sampler2D _MainTex;
vec3 DecodeViewNormalStereo( in vec4 enc4 );
float DecodeFloatRG( in vec2 enc );
void DecodeDepthNormal( in vec4 enc, out float depth, out vec3 normal );
vec4 frag( in v2f_img i );
vec3 DecodeViewNormalStereo( in vec4 enc4 ) {
    float kScale = 1.77770;
    vec3 nn;
    float g;
    vec3 n;
    nn = ((enc4.xyz  * vec3( (2.00000 * kScale), (2.00000 * kScale), 0.000000)) + vec3( ( -kScale ), ( -kScale ), 1.00000));
    g = (2.00000 / dot( nn.xyz , nn.xyz ));
    n.xy  = (g * nn.xy );
    n.z  = (g - 1.00000);
    return n;
}
float DecodeFloatRG( in vec2 enc ) {
    vec2 kDecodeDot = vec2( 1.00000, 0.00392157);
    return dot( enc, kDecodeDot);
}
void DecodeDepthNormal( in vec4 enc, out float depth, out vec3 normal ) {
    depth = DecodeFloatRG( enc.zw );
    normal = DecodeViewNormalStereo( enc);
}
vec4 frag( in v2f_img i ) {
    vec4 tex;
    vec4 depth;
    float z;
    vec3 n;
    vec4 col;
    tex = texture2D( _MainTex, i.uv);
    depth = texture2D( _CameraDepthNormalsTexture, i.uv);
    DecodeDepthNormal( depth, z, n);
    col.x  = z;
    col.y  = ((n.x  * 0.500000) + 0.500000);
    col.z  = ((n.y  * 0.500000) + 0.500000);
    col.w  = tex.w ;
    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);
}