bgfx/3rdparty/glsl-optimizer/tests/fragment/zun-RenderFX_Skybox-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 v2f {
    vec4 vertex;
    vec2 texcoord;
};
struct appdata_t {
    vec4 vertex;
    vec2 texcoord;
};
uniform vec4 _Tint;
uniform sampler2D _UpTex;
vec4 skybox_frag( in v2f i, in sampler2D smp );
vec4 frag( in v2f i );
vec4 skybox_frag( in v2f i, in sampler2D smp ) {
    vec4 tex;
    vec4 col;
    tex = texture2D( smp, i.texcoord);
    col.xyz  = ((tex.xyz  + _Tint.xyz ) - 0.500000);
    col.w  = (tex.w  * _Tint.w );
    return col;
}
vec4 frag( in v2f i ) {
    return skybox_frag( i, _UpTex);
}
void main() {
    vec4 xl_retval;
    v2f xlt_i;
    xlt_i.vertex = vec4(0.0);
    xlt_i.texcoord = vec2( gl_TexCoord[0]);
    xl_retval = frag( xlt_i);
    gl_FragData[0] = vec4( xl_retval);
}