bgfx/3rdparty/glsl-optimizer/tests/fragment/zun-Surface_ScreenPosAlbedo1-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;
};
struct SurfaceOutput {
    vec3 Albedo;
    vec3 Normal;
    vec3 Emission;
    float Specular;
    float Gloss;
    float Alpha;
};
struct Input {
    vec4 screenPos;
};
struct v2f_surf {
    vec4 pos;
    float fog;
    vec4 hip_screenPos;
    vec4 hip_screen;
};
struct appdata_full {
    vec4 vertex;
    vec4 tangent;
    vec3 normal;
    vec4 texcoord;
    vec4 texcoord1;
    vec4 color;
};
uniform sampler2D _LightBuffer;
uniform sampler2D _MainTex;
uniform vec4 unity_Ambient;
void surf( in Input IN, inout SurfaceOutput o );
vec4 LightingLambert_PrePass( in SurfaceOutput s, in vec4 light );
vec4 frag_surf( in v2f_surf IN );
void surf( in Input IN, inout SurfaceOutput o ) {
    vec2 uv;
    uv = (IN.screenPos.xy  / IN.screenPos.w );
    uv *= vec2( 2.00000, 1.00000);
    o.Albedo = texture2D( _MainTex, uv).xyz ;
}
vec4 LightingLambert_PrePass( in SurfaceOutput s, in vec4 light ) {
    vec4 c;
    c.xyz  = (s.Albedo * light.xyz );
    c.w  = s.Alpha;
    return c;
}
vec4 frag_surf( in v2f_surf IN ) {
    Input surfIN;
    SurfaceOutput o;
    vec4 light;
    vec4 col;
    surfIN.screenPos = IN.hip_screenPos;
    o.Albedo = vec3( 0.000000);
    o.Emission = vec3( 0.000000);
    o.Specular = 0.000000;
    o.Alpha = 0.000000;
    o.Gloss = 0.000000;
    surf( surfIN, o);
    light = texture2DProj( _LightBuffer, IN.hip_screen);
    light = ( -log2( light ) );
    light.xyz  += unity_Ambient.xyz ;
    col = LightingLambert_PrePass( o, light);
    return col;
}
varying vec4 xlv_FOG;
void main() {
    vec4 xl_retval;
    v2f_surf xlt_IN;
    xlt_IN.pos = vec4(0.0);
    xlt_IN.fog = float( xlv_FOG);
    xlt_IN.hip_screenPos = vec4( gl_TexCoord[0]);
    xlt_IN.hip_screen = vec4( gl_TexCoord[1]);
    xl_retval = frag_surf( xlt_IN);
    gl_FragData[0] = vec4( xl_retval);
}