bgfx/3rdparty/glsl-optimizer/tests/fragment/z-fxaa-preset3-outES3Metal.txt

#include <metal_stdlib>
using namespace metal;
struct xlatMtlShaderInput {
  float2 xlv_TEXCOORD0;
};
struct xlatMtlShaderOutput {
  half4 _fragData [[color(0)]];
};
struct xlatMtlShaderUniform {
  float4 _MainTex_TexelSize;
};
fragment xlatMtlShaderOutput xlatMtlMain (xlatMtlShaderInput _mtl_i [[stage_in]], constant xlatMtlShaderUniform& _mtl_u [[buffer(0)]]
  ,   texture2d<half> _MainTex [[texture(0)]], sampler _mtlsmp__MainTex [[sampler(0)]])
{
  xlatMtlShaderOutput _mtl_o;
  float2 rcpFrame_1;
  rcpFrame_1 = _mtl_u._MainTex_TexelSize.xy;
  half3 tmpvar_2;
  bool doneP_4;
  bool doneN_5;
  half lumaEndP_6;
  half lumaEndN_7;
  float2 offNP_8;
  float2 posP_9;
  float2 posN_10;
  half gradientN_11;
  float lengthSign_12;
  half3 rgbL_13;
  half lumaS_14;
  half lumaN_15;
  float4 tmpvar_16;
  tmpvar_16.zw = float2(0.0, 0.0);
  tmpvar_16.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(0.0, -1.0) * _mtl_u._MainTex_TexelSize.xy));
  half4 tmpvar_17;
  tmpvar_17 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_16.xy), level(0.0));
  float4 tmpvar_18;
  tmpvar_18.zw = float2(0.0, 0.0);
  tmpvar_18.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(-1.0, 0.0) * _mtl_u._MainTex_TexelSize.xy));
  half4 tmpvar_19;
  tmpvar_19 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_18.xy), level(0.0));
  half4 tmpvar_20;
  tmpvar_20 = _MainTex.sample(_mtlsmp__MainTex, (float2)(_mtl_i.xlv_TEXCOORD0), level(0.0));
  float4 tmpvar_21;
  tmpvar_21.zw = float2(0.0, 0.0);
  tmpvar_21.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(1.0, 0.0) * _mtl_u._MainTex_TexelSize.xy));
  half4 tmpvar_22;
  tmpvar_22 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_21.xy), level(0.0));
  float4 tmpvar_23;
  tmpvar_23.zw = float2(0.0, 0.0);
  tmpvar_23.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(0.0, 1.0) * _mtl_u._MainTex_TexelSize.xy));
  half4 tmpvar_24;
  tmpvar_24 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_23.xy), level(0.0));
  half tmpvar_25;
  tmpvar_25 = ((tmpvar_17.y * (half)1.96321) + tmpvar_17.x);
  lumaN_15 = tmpvar_25;
  half tmpvar_26;
  tmpvar_26 = ((tmpvar_19.y * (half)1.96321) + tmpvar_19.x);
  half tmpvar_27;
  tmpvar_27 = ((tmpvar_20.y * (half)1.96321) + tmpvar_20.x);
  half tmpvar_28;
  tmpvar_28 = ((tmpvar_22.y * (half)1.96321) + tmpvar_22.x);
  half tmpvar_29;
  tmpvar_29 = ((tmpvar_24.y * (half)1.96321) + tmpvar_24.x);
  lumaS_14 = tmpvar_29;
  half tmpvar_30;
  tmpvar_30 = max (max (tmpvar_27, tmpvar_25), max (max (tmpvar_26, tmpvar_29), tmpvar_28));
  half tmpvar_31;
  tmpvar_31 = (tmpvar_30 - min (min (tmpvar_27, tmpvar_25), min (
    min (tmpvar_26, tmpvar_29)
  , tmpvar_28)));
  half tmpvar_32;
  tmpvar_32 = max ((half)0.0416667, (tmpvar_30 * (half)0.125));
  if ((tmpvar_31 < tmpvar_32)) {
    tmpvar_2 = tmpvar_20.xyz;
  } else {
    half tmpvar_33;
    tmpvar_33 = min ((half)0.75, (max ((half)0.0, 
      ((abs((
        (((tmpvar_25 + tmpvar_26) + (tmpvar_28 + tmpvar_29)) * (half)0.25)
       - tmpvar_27)) / tmpvar_31) - (half)0.25)
    ) * (half)1.33333));
    float4 tmpvar_34;
    tmpvar_34.zw = float2(0.0, 0.0);
    tmpvar_34.xy = (_mtl_i.xlv_TEXCOORD0 - _mtl_u._MainTex_TexelSize.xy);
    half4 tmpvar_35;
    tmpvar_35 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_34.xy), level(0.0));
    float4 tmpvar_36;
    tmpvar_36.zw = float2(0.0, 0.0);
    tmpvar_36.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(1.0, -1.0) * _mtl_u._MainTex_TexelSize.xy));
    half4 tmpvar_37;
    tmpvar_37 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_36.xy), level(0.0));
    float4 tmpvar_38;
    tmpvar_38.zw = float2(0.0, 0.0);
    tmpvar_38.xy = (_mtl_i.xlv_TEXCOORD0 + (float2(-1.0, 1.0) * _mtl_u._MainTex_TexelSize.xy));
    half4 tmpvar_39;
    tmpvar_39 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_38.xy), level(0.0));
    float4 tmpvar_40;
    tmpvar_40.zw = float2(0.0, 0.0);
    tmpvar_40.xy = (_mtl_i.xlv_TEXCOORD0 + _mtl_u._MainTex_TexelSize.xy);
    half4 tmpvar_41;
    tmpvar_41 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_40.xy), level(0.0));
    rgbL_13 = (((tmpvar_17.xyz + tmpvar_19.xyz) + (tmpvar_20.xyz + tmpvar_22.xyz)) + ((tmpvar_24.xyz + tmpvar_35.xyz) + (
      (tmpvar_37.xyz + tmpvar_39.xyz)
     + tmpvar_41.xyz)));
    rgbL_13 = (rgbL_13 * (half3)float3(0.111111, 0.111111, 0.111111));
    half tmpvar_42;
    tmpvar_42 = ((tmpvar_35.y * (half)1.96321) + tmpvar_35.x);
    half tmpvar_43;
    tmpvar_43 = ((tmpvar_37.y * (half)1.96321) + tmpvar_37.x);
    half tmpvar_44;
    tmpvar_44 = ((tmpvar_39.y * (half)1.96321) + tmpvar_39.x);
    half tmpvar_45;
    tmpvar_45 = ((tmpvar_41.y * (half)1.96321) + tmpvar_41.x);
    bool tmpvar_46;
    tmpvar_46 = (((
      abs(((((half)0.25 * tmpvar_42) + ((half)-0.5 * tmpvar_26)) + ((half)0.25 * tmpvar_44)))
     + 
      abs(((((half)0.5 * tmpvar_25) - tmpvar_27) + ((half)0.5 * tmpvar_29)))
    ) + abs(
      ((((half)0.25 * tmpvar_43) + ((half)-0.5 * tmpvar_28)) + ((half)0.25 * tmpvar_45))
    )) >= ((
      abs(((((half)0.25 * tmpvar_42) + ((half)-0.5 * tmpvar_25)) + ((half)0.25 * tmpvar_43)))
     + 
      abs(((((half)0.5 * tmpvar_26) - tmpvar_27) + ((half)0.5 * tmpvar_28)))
    ) + abs(
      ((((half)0.25 * tmpvar_44) + ((half)-0.5 * tmpvar_29)) + ((half)0.25 * tmpvar_45))
    )));
    float tmpvar_47;
    if (tmpvar_46) {
      tmpvar_47 = -(_mtl_u._MainTex_TexelSize.y);
    } else {
      tmpvar_47 = -(_mtl_u._MainTex_TexelSize.x);
    };
    lengthSign_12 = tmpvar_47;
    if (!(tmpvar_46)) {
      lumaN_15 = tmpvar_26;
    };
    if (!(tmpvar_46)) {
      lumaS_14 = tmpvar_28;
    };
    half tmpvar_48;
    tmpvar_48 = abs((lumaN_15 - tmpvar_27));
    gradientN_11 = tmpvar_48;
    half tmpvar_49;
    tmpvar_49 = abs((lumaS_14 - tmpvar_27));
    lumaN_15 = ((lumaN_15 + tmpvar_27) * (half)0.5);
    lumaS_14 = ((lumaS_14 + tmpvar_27) * (half)0.5);
    bool tmpvar_50;
    tmpvar_50 = (tmpvar_48 >= tmpvar_49);
    if (!(tmpvar_50)) {
      lumaN_15 = lumaS_14;
    };
    if (!(tmpvar_50)) {
      gradientN_11 = tmpvar_49;
    };
    if (!(tmpvar_50)) {
      lengthSign_12 = -(tmpvar_47);
    };
    float tmpvar_51;
    if (tmpvar_46) {
      tmpvar_51 = 0.0;
    } else {
      tmpvar_51 = (lengthSign_12 * 0.5);
    };
    posN_10.x = (_mtl_i.xlv_TEXCOORD0.x + tmpvar_51);
    float tmpvar_52;
    if (tmpvar_46) {
      tmpvar_52 = (lengthSign_12 * 0.5);
    } else {
      tmpvar_52 = 0.0;
    };
    posN_10.y = (_mtl_i.xlv_TEXCOORD0.y + tmpvar_52);
    gradientN_11 = (gradientN_11 * (half)0.25);
    posP_9 = posN_10;
    float2 tmpvar_53;
    if (tmpvar_46) {
      float2 tmpvar_54;
      tmpvar_54.y = 0.0;
      tmpvar_54.x = rcpFrame_1.x;
      tmpvar_53 = tmpvar_54;
    } else {
      float2 tmpvar_55;
      tmpvar_55.x = 0.0;
      tmpvar_55.y = rcpFrame_1.y;
      tmpvar_53 = tmpvar_55;
    };
    offNP_8 = tmpvar_53;
    lumaEndN_7 = lumaN_15;
    lumaEndP_6 = lumaN_15;
    doneN_5 = bool(bool(0));
    doneP_4 = bool(bool(0));
    posN_10 = (posN_10 - tmpvar_53);
    posP_9 = (posP_9 + tmpvar_53);
    for (int i_3 = 0; i_3 < 16; i_3++) {
      if (!(doneN_5)) {
        half4 tmpvar_56;
        tmpvar_56 = _MainTex.sample(_mtlsmp__MainTex, (float2)(posN_10), level(0.0));
        lumaEndN_7 = ((tmpvar_56.y * (half)1.96321) + tmpvar_56.x);
      };
      if (!(doneP_4)) {
        half4 tmpvar_57;
        tmpvar_57 = _MainTex.sample(_mtlsmp__MainTex, (float2)(posP_9), level(0.0));
        lumaEndP_6 = ((tmpvar_57.y * (half)1.96321) + tmpvar_57.x);
      };
      bool tmpvar_58;
      if (doneN_5) {
        tmpvar_58 = bool(bool(1));
      } else {
        tmpvar_58 = (abs((lumaEndN_7 - lumaN_15)) >= gradientN_11);
      };
      doneN_5 = tmpvar_58;
      bool tmpvar_59;
      if (doneP_4) {
        tmpvar_59 = bool(bool(1));
      } else {
        tmpvar_59 = (abs((lumaEndP_6 - lumaN_15)) >= gradientN_11);
      };
      doneP_4 = tmpvar_59;
      if ((tmpvar_58 && tmpvar_59)) {
        break;
      };
      if (!(tmpvar_58)) {
        posN_10 = (posN_10 - offNP_8);
      };
      if (!(tmpvar_59)) {
        posP_9 = (posP_9 + offNP_8);
      };
    };
    float tmpvar_60;
    if (tmpvar_46) {
      tmpvar_60 = (_mtl_i.xlv_TEXCOORD0.x - posN_10.x);
    } else {
      tmpvar_60 = (_mtl_i.xlv_TEXCOORD0.y - posN_10.y);
    };
    float tmpvar_61;
    if (tmpvar_46) {
      tmpvar_61 = (posP_9.x - _mtl_i.xlv_TEXCOORD0.x);
    } else {
      tmpvar_61 = (posP_9.y - _mtl_i.xlv_TEXCOORD0.y);
    };
    bool tmpvar_62;
    tmpvar_62 = (tmpvar_60 < tmpvar_61);
    half tmpvar_63;
    if (tmpvar_62) {
      tmpvar_63 = lumaEndN_7;
    } else {
      tmpvar_63 = lumaEndP_6;
    };
    lumaEndN_7 = tmpvar_63;
    if ((((tmpvar_27 - lumaN_15) < (half)0.0) == ((tmpvar_63 - lumaN_15) < (half)0.0))) {
      lengthSign_12 = 0.0;
    };
    float tmpvar_64;
    tmpvar_64 = (tmpvar_61 + tmpvar_60);
    float tmpvar_65;
    if (tmpvar_62) {
      tmpvar_65 = tmpvar_60;
    } else {
      tmpvar_65 = tmpvar_61;
    };
    float tmpvar_66;
    tmpvar_66 = ((0.5 + (tmpvar_65 * 
      (-1.0 / tmpvar_64)
    )) * lengthSign_12);
    float tmpvar_67;
    if (tmpvar_46) {
      tmpvar_67 = 0.0;
    } else {
      tmpvar_67 = tmpvar_66;
    };
    float tmpvar_68;
    if (tmpvar_46) {
      tmpvar_68 = tmpvar_66;
    } else {
      tmpvar_68 = 0.0;
    };
    float2 tmpvar_69;
    tmpvar_69.x = (_mtl_i.xlv_TEXCOORD0.x + tmpvar_67);
    tmpvar_69.y = (_mtl_i.xlv_TEXCOORD0.y + tmpvar_68);
    half4 tmpvar_70;
    tmpvar_70 = _MainTex.sample(_mtlsmp__MainTex, (float2)(tmpvar_69), level(0.0));
    half3 tmpvar_71;
    tmpvar_71.x = -(tmpvar_33);
    tmpvar_71.y = -(tmpvar_33);
    tmpvar_71.z = -(tmpvar_33);
    tmpvar_2 = ((tmpvar_71 * tmpvar_70.xyz) + ((rgbL_13 * half3(tmpvar_33)) + tmpvar_70.xyz));
  };
  half4 tmpvar_72;
  tmpvar_72.w = half(0.0);
  tmpvar_72.xyz = tmpvar_2;
  _mtl_o._fragData = tmpvar_72;
  return _mtl_o;
}


// stats: 191 alu 12 tex 26 flow
// inputs: 1
//  #0: xlv_TEXCOORD0 (high float) 2x1 [-1]
// uniforms: 1 (total size: 16)
//  #0: _MainTex_TexelSize (high float) 4x1 [-1] loc 0
// textures: 1
//  #0: _MainTex (low 2d) 0x0 [-1] loc 0