// Copyright (c) 2017-2022 Xiamen Yaji Software Co., Ltd.

CCEffect %{
  techniques:
  - name: opaque
    passes:
    - vert: standard-vs
      frag: standard-fs
      properties: &props
        tilingOffset:                     { value: [1.0, 1.0, 0.0, 0.0] }
        mainColor:                        { value: [1.0, 1.0, 1.0, 1.0], target: albedo, linear: true, editor: { displayName: Albedo, type: color } }
        albedoScale:                      { value: [1.0, 1.0, 1.0], target: albedoScaleAndCutoff.xyz }
        alphaThreshold:                   { value: 0.5, target: albedoScaleAndCutoff.w, editor: { parent: USE_ALPHA_TEST, slide: true, range: [0, 1.0], step: 0.001 } }
        occlusion:                        { value: 0.0, target: pbrParams.x, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        roughness:                        { value: 0.5, target: pbrParams.y, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        metallic:                         { value: 0.0, target: pbrParams.z, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        specularIntensity:                { value: 0.5, target: pbrParams.w, editor: { slide: true, range: [0.0, 1.0], step: 0.001 } }
        normalStrength:                   { value: 1.0, target: emissiveScaleParam.w, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 5.0], step: 0.001 } }
        anisotropyIntensity:              { value: 1.0, target: anisotropyParam.x, editor: { parent: IS_ANISOTROPY, slide : true, range : [0.0, 1.0] , step : 0.0001 } }
        anisotropyRotation:               { value: 0.0, target: anisotropyParam.y, editor: { parent: IS_ANISOTROPY, slide : true, range : [0, 1.0] , step : 0.0001 } }
        anisotropyMapResolutionHeight:    { value: 0.0, target: anisotropyParam.w, editor: { parent: FIX_ANISOTROPIC_ROTATION_MAP } }
        addOnShadowBias:                  { value: 0.0, target: anisotropyParam.z }
        mainTexture:                      { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
        normalMap:                        { value: normal }
        pbrMap:                           { value: grey }
        occlusionMap:                     { value: white }
        anisotropyMap:                    { value: black, editor : { parent: IS_ANISOTROPY } }
        sheenColor:                       { value: [1.0, 1.0, 1.0, 1.0], linear: true, editor: { type: color } }
        sheenRoughness:                   { value: 1.0, target: emissiveScaleParam.x, editor: { slide: true, range: [0.0, 1.0], step: 0.001 } }
        sheenOpacity:                     { value: 1.0, target: emissiveScaleParam.y, editor: { slide: true, range: [0.0, 1.0], step: 0.001 } }
        sheenIntensity:                   { value: 1.0, target: emissiveScaleParam.w, editor: { slide: true, range: [1.0, 3.0], step: 0.001 } }
        sheenColorMap:                    { value: white, editor: { parent: USE_SHEEN_COLOR_MAP } }
        sheenDataMap:                     { value: white, editor: { parent: USE_SHEEN_DATA_MAP, tooltips: 'r: sheen roughness  g: sheen opacity' } }
    - &forward-add
      vert: standard-vs
      frag: standard-fs
      phase: forward-add
      propertyIndex: 0
      embeddedMacros: { CC_FORWARD_ADD: true }
      depthStencilState:
        depthFunc: equal
        depthTest: true
        depthWrite: false
      blendState:
        targets:
        - blend: true
          blendSrc: one
          blendDst: one
          blendSrcAlpha: zero
          blendDstAlpha: one
    - &shadow-caster
      vert: shadow-caster-vs
      frag: shadow-caster-fs
      phase: shadow-caster
      propertyIndex: 0
      rasterizerState:
        cullMode: front
      properties:
        tilingOffset:   { value: [1.0, 1.0, 0.0, 0.0] }
        mainColor:      { value: [1.0, 1.0, 1.0, 1.0], target: albedo, editor: { displayName: Albedo, type: color } }
        albedoScale:    { value: [1.0, 1.0, 1.0], target: albedoScaleAndCutoff.xyz }
        alphaThreshold: { value: 0.5, target: albedoScaleAndCutoff.w, editor: { parent: USE_ALPHA_TEST } }
        mainTexture:    { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
    - &reflect-map
      vert: standard-vs
      frag: reflect-map-fs
      phase: reflect-map
      propertyIndex: 0
    - &planar-shadow
      vert: planar-shadow-vs
      frag: planar-shadow-fs
      phase: planar-shadow
      propertyIndex: 0
      depthStencilState:
        depthTest: true
        depthWrite: false
        stencilTestFront: true
        stencilFuncFront: not_equal
        stencilPassOpFront: replace
        stencilRef: 0x80 # only use the leftmost bit
        stencilReadMask: 0x80
        stencilWriteMask: 0x80
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendDstAlpha: one_minus_src_alpha
    - &deferred
      vert: standard-vs
      frag: standard-fs
      pass: gbuffer
      phase: gbuffer
      embeddedMacros: { CC_PIPELINE_TYPE: 1 }
      propertyIndex: 0
  - name: transparent
    passes:
    - vert: standard-vs
      frag: standard-fs
      embeddedMacros: { CC_FORCE_FORWARD_SHADING: true }
      depthStencilState: &d1
        depthTest: true
        depthWrite: false
      blendState: &b1
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendDstAlpha: one_minus_src_alpha
      properties: *props
    - *forward-add
    - *shadow-caster
    - *planar-shadow
    - &deferred-forward
      vert: standard-vs
      frag: standard-fs
      phase: deferred-forward
      embeddedMacros: { CC_PIPELINE_TYPE: 0 }
      propertyIndex: 0
      depthStencilState: *d1
      blendState: *b1
}%

CCProgram shared-ubos %{
  uniform Constants {
    vec4 tilingOffset;
    vec4 albedo;
    vec4 albedoScaleAndCutoff;
    vec4 pbrParams;
    vec4 sheenColor;
    vec4 emissiveScaleParam;
    vec4 anisotropyParam;
  };
}%

CCProgram macro-remapping %{
  // ui displayed macros
  #pragma define-meta HAS_SECOND_UV
  #pragma define-meta USE_TWOSIDE
  #pragma define-meta IS_ANISOTROPY
  #pragma define-meta USE_VERTEX_COLOR

  #define CC_SURFACES_USE_SECOND_UV HAS_SECOND_UV
  #define CC_SURFACES_USE_TWO_SIDED USE_TWOSIDE
  #define CC_SURFACES_LIGHTING_ANISOTROPIC IS_ANISOTROPY
  #define CC_SURFACES_USE_VERTEX_COLOR USE_VERTEX_COLOR
  #define CC_SURFACES_LIGHTING_SHEEN 1

  // sheen need tangent
  #define CC_SURFACES_USE_TANGENT_SPACE 1

  // functionality for each effect
  #define CC_SURFACES_LIGHTING_ANISOTROPIC_ENVCONVOLUTION_COUNT 31
}%

CCProgram surface-vertex %{
  #define CC_SURFACES_VERTEX_MODIFY_SHADOW_BIAS
  vec2 SurfacesVertexModifyShadowBias(in SurfacesStandardVertexIntermediate In, vec2 originShadowBias)
  {
    return originShadowBias + vec2(anisotropyParam.z, 0.0);
  }

  #define CC_SURFACES_VERTEX_MODIFY_UV
  void SurfacesVertexModifyUV(inout SurfacesStandardVertexIntermediate In)
  {
    In.texCoord = In.texCoord * tilingOffset.xy + tilingOffset.zw;
  #if CC_SURFACES_USE_SECOND_UV
    In.texCoord1 = In.texCoord1 * tilingOffset.xy + tilingOffset.zw;
  #endif
  }
}%

CCProgram surface-fragment %{
  #if USE_ALBEDO_MAP
    uniform sampler2D albedoMap;
    #pragma define-meta ALBEDO_UV options([v_uv, v_uv1])
  #endif
  #if USE_NORMAL_MAP
    uniform sampler2D normalMap;
    #pragma define-meta NORMAL_UV options([v_uv, v_uv1])
  #endif
  #pragma define-meta DEFAULT_UV options([v_uv, v_uv1])
  #if USE_PBR_MAP
    uniform sampler2D pbrMap;
  #endif
  #if USE_OCCLUSION_MAP
    uniform sampler2D occlusionMap;
  #endif
  #if IS_ANISOTROPY && USE_ANISOTROPY_MAP
    uniform sampler2D anisotropyMap;
  #endif
  #if USE_SHEEN_COLOR_MAP
    uniform sampler2D sheenColorMap;
  #endif
  #if USE_SHEEN_DATA_MAP
    uniform sampler2D sheenDataMap;
  #endif

  #pragma define OCCLUSION_CHANNEL          r
  #pragma define ROUGHNESS_CHANNEL          g
  #pragma define METALLIC_CHANNEL           b
  #pragma define SPECULAR_INTENSITY_CHANNEL a

  #if USE_ALPHA_TEST
    #pragma define-meta ALPHA_TEST_CHANNEL options([a, r])
  #endif

  #define CC_SURFACES_FRAGMENT_MODIFY_ANISOTROPY_PARAMS
  vec4 SurfacesFragmentModifyAnisotropyParams(out float isRotation)
  {
    float anisotropyRotation = anisotropyParam.y * PI;
    float anisotropyShape = anisotropyParam.x;
    #if IS_ANISOTROPY && USE_ANISOTROPY_MAP
      // Rotation angle should disable trilinear filtering
      vec4 tex = texture(anisotropyMap, DEFAULT_UV);
      anisotropyRotation = fract(anisotropyRotation * 0.5 + tex.y) * PI2;
      // less value is better for SP exported shape
      anisotropyShape *= tex.x;
    #endif

    isRotation = 1.0;
    return vec4(anisotropyShape, anisotropyRotation, 0.0, 0.0);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_SHEEN_PARAMS
  vec4 SurfacesFragmentModifySheenParams()
  {
    vec4 param = emissiveScaleParam;
    #if USE_SHEEN_DATA_MAP
      param.xy *= texture(sheenDataMap, FSInput_texcoord).xy;
    #endif
    return param;
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_SHEEN_COLOR
  vec3 SurfacesFragmentModifySheenColor()
  {
    #if USE_SHEEN_COLOR_MAP
      return sheenColor.rgb * texture(sheenColorMap, FSInput_texcoord).rgb;
    #else
      return sheenColor.rgb;
    #endif
  }

  #include <common-functions>
}%

CCProgram standard-vs %{
  precision highp float;

  // 1. surface internal macros, for technique usage or remapping some user (material) macros to surface internal macros
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>

  // 2. common include with corresponding shader stage, include before surface functions
  #include <surfaces/includes/common-vs>

  // 3. user surface functions that can use user (effect) parameters (ubo Constants)
  //    see surfaces/default-functions/xxx.chunk
  #include <shared-ubos>
  #include <surface-vertex>

  // 4. surface include with corresponding shader stage and shading-model (optional)
  #include <surfaces/includes/standard-vs>

  // 5. shader entry with corresponding shader stage and technique usage/type
  #include <shading-entries/main-functions/render-to-scene/vs>
}%


CCProgram shadow-caster-vs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-to-shadowmap>
  #include <surfaces/includes/common-vs>
  #include <shared-ubos>
  #include <surface-vertex>
  #include <shading-entries/main-functions/render-to-shadowmap/vs>
}%

CCProgram planar-shadow-vs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-planar-shadow>
  #include <surfaces/includes/common-vs>
  #include <shared-ubos>
  #include <surface-vertex>
  #include <shading-entries/main-functions/render-planar-shadow/vs>
}%


CCProgram standard-fs %{
  // shading-model : standard
  // lighting-model : standard (isotropy / anisotropy pbr)
  // shader stage : fs
  // technique usage/type : render-to-scene

  precision highp float;
  // 1. surface internal macros, for technique usage or remapping some user (material) macros to surface internal macros
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>

  // 2. common include with corresponding shader stage, include before surface functions
  #include <surfaces/includes/common-fs>

  // 3. user surface functions that can use user (effect) parameters (ubo Constants)
  //    see surfaces/default-functions/xxx.chunk
  #include <shared-ubos>
  #include <surface-fragment>

  // 4. lighting-model (optional)
  #include <lighting-models/includes/standard>

  // 5. surface include with corresponding shader stage and shading-model (optional)
  #include <surfaces/includes/standard-fs>

  // 6. shader entry with corresponding shader stage and technique usage/type
  #include <shading-entries/main-functions/render-to-scene/fs>
}%

CCProgram shadow-caster-fs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-to-shadowmap>
  #include <surfaces/includes/common-fs>
  #include <shared-ubos>
  #include <surface-fragment>
  #include <shading-entries/main-functions/render-to-shadowmap/fs>
}%

CCProgram planar-shadow-fs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-planar-shadow>
  #include <surfaces/includes/common-fs>
  #include <shared-ubos>
  #include <surface-fragment>
  #include <shading-entries/main-functions/render-planar-shadow/fs>
}%

CCProgram reflect-map-fs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>
  #include <surfaces/includes/common-fs>
  #include <shared-ubos>
  #include <surface-fragment>
  #include <lighting-models/includes/standard>
  #include <surfaces/includes/standard-fs>
  #include <shading-entries/main-functions/render-to-reflectmap/fs>
}%