bgfx/3rdparty/glsl-optimizer/tests/fragment/z-DirLMBasis-inES3.txt

#version 300 es

// A variant produced by Unity's directional lightmap;
// has an inline medium precision matrix constructor,
// but even if unity_DirBasis is declared as mediump
// some code was promoting it to high precision.

#define gl_FragColor _glesFragData[0]
#define gl_FragData _glesFragData
layout(location = 0)out mediump vec4 _glesFragData[4];

mat3 xll_transpose_mf3x3(mat3 m) {
  return mat3( m[0][0], m[1][0], m[2][0],
               m[0][1], m[1][1], m[2][1],
               m[0][2], m[1][2], m[2][2]);
}
vec3 xll_saturate_vf3( vec3 x) {
  return clamp( x, 0.0, 1.0);
}
struct SurfaceOutput {
    lowp vec3 Albedo;
    lowp vec3 Normal;
    lowp vec3 Emission;
    mediump float Specular;
    lowp float Gloss;
    lowp float Alpha;
};
struct Input {
    highp vec2 uv_MainTex;
};
struct v2f_surf {
    highp vec4 pos;
    highp vec2 pack0;
    lowp vec3 tSpace0;
    lowp vec3 tSpace1;
    lowp vec3 tSpace2;
    highp vec4 lmap;
};
uniform mediump vec4 _WorldSpaceLightPos0;
uniform sampler2D unity_Lightmap;
uniform sampler2D unity_LightmapInd;
uniform lowp vec4 _LightColor0;
uniform lowp vec4 _SpecColor;
uniform sampler2D _MainTex;
uniform highp vec4 _MainTex_ST;
lowp vec3 DecodeLightmapDoubleLDR( in lowp vec4 color ) {
    return (2.0 * color.xyz);
}
lowp vec3 DecodeLightmap( in lowp vec4 color ) {
   
    return DecodeLightmapDoubleLDR( color);
}
mediump vec3 DirLightmapDiffuse( in mediump mat3 dirBasis, in lowp vec4 color, in lowp vec4 scale, in mediump vec3 normal, in bool surfFuncWritesNormal, out mediump vec3 scalePerBasisVector ) {
    mediump vec3 lm = DecodeLightmap( color);
   
    scalePerBasisVector = DecodeLightmap( scale);
    if (surfFuncWritesNormal){
       
        mediump vec3 normalInRnmBasis = xll_saturate_vf3((dirBasis * normal));
        lm *= dot( normalInRnmBasis, scalePerBasisVector);
    }
   
    return lm;
}
mediump vec4 LightingLambert_DirLightmap( in SurfaceOutput s, in lowp vec4 color, in lowp vec4 scale, in bool surfFuncWritesNormal ) {
    mediump mat3 unity_DirBasis = xll_transpose_mf3x3(mat3( vec3( 0.8164966, 0.0, 0.5773503), vec3( -0.4082483, 0.7071068, 0.5773503), vec3( -0.4082483, -0.7071068, 0.5773503)));
    mediump vec3 scalePerBasisVector;
   
    mediump vec4 c;
    c.xyz = DirLightmapDiffuse( unity_DirBasis, color, scale, s.Normal, surfFuncWritesNormal, scalePerBasisVector);
    c.w = 0.0;
   
    return c;
}
void surf( in Input IN, inout SurfaceOutput o ) {
    mediump vec4 c = texture( _MainTex, IN.uv_MainTex);
    o.Albedo = c.xyz;
    o.Alpha = c.w;
   
    o.Normal = ((c.xyz * 2.0) - 1.0);
}
lowp vec4 frag_surf( in v2f_surf IN ) {
    Input surfIN;
   
    surfIN.uv_MainTex = IN.pack0.xy;
    highp vec3 lightDir = _WorldSpaceLightPos0.xyz;
   
    SurfaceOutput o;
    o.Albedo = vec3( 0.0);
    o.Emission = vec3( 0.0);
   
    o.Specular = 0.0;
    o.Alpha = 0.0;
    o.Gloss = 0.0;
    lowp vec3 normalWorldVertex = vec3( 0.0, 0.0, 1.0);
   
    surf( surfIN, o);
    lowp float atten = 1.0;
   
    lowp vec4 c = vec4( 0.0);
   
    lowp vec4 lmtex = texture( unity_Lightmap, IN.lmap.xy);
    lowp vec4 lmIndTex = texture( unity_LightmapInd, IN.lmap.xy);
    mediump vec3 lm = LightingLambert_DirLightmap( o, lmtex, lmIndTex, true).xyz;
   
    lowp vec3 worldN;
    worldN.x = dot( IN.tSpace0.xyz, o.Normal);
    worldN.y = dot( IN.tSpace1.xyz, o.Normal);
    worldN.z = dot( IN.tSpace2.xyz, o.Normal);
   
    o.Normal = worldN;
   
    c.w = o.Alpha;
   
    c.xyz += (o.Albedo * lm);
   
    c.w = 1.0;
    return c;
}
in highp vec2 xlv_TEXCOORD0;
in lowp vec3 xlv_TEXCOORD1;
in lowp vec3 xlv_TEXCOORD2;
in lowp vec3 xlv_TEXCOORD3;
in highp vec4 xlv_TEXCOORD4;
void main() {
    lowp vec4 xl_retval;
    v2f_surf xlt_IN;
    xlt_IN.pos = vec4(0.0);
    xlt_IN.pack0 = vec2(xlv_TEXCOORD0);
    xlt_IN.tSpace0 = vec3(xlv_TEXCOORD1);
    xlt_IN.tSpace1 = vec3(xlv_TEXCOORD2);
    xlt_IN.tSpace2 = vec3(xlv_TEXCOORD3);
    xlt_IN.lmap = vec4(xlv_TEXCOORD4);
    xl_retval = frag_surf( xlt_IN);
    gl_FragData[0] = vec4(xl_retval);
}