// Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.
CCEffect %{
  techniques:
  - name: opaque
    passes:
    - vert: unlit-vs:vert
      frag: unlit-fs:frag
      properties: &props
        mainTexture:     { value: grey }
        tilingOffset:    { value: [1, 1, 0, 0] }
        mainColor:       { value: [1, 1, 1, 1], editor: { type: color } }
        colorScale:      { value: [1, 1, 1], target: colorScaleAndCutoff.xyz }
        alphaThreshold:  { value: 0.5, target: colorScaleAndCutoff.w, editor: { parent: USE_ALPHA_TEST } }
        dimensions:      { value: [2, 2], target: seqAnimParams.xy }
        frames:          { value: 4, target: seqAnimParams.z }
        speedOrProgress: { value: 10, target: seqAnimParams.w }
      migrations: &migs
        properties:
          dimensions:      { formerlySerializedAs: constants.xy }
          frames:          { formerlySerializedAs: constants.z }
          speedOrProgress: { formerlySerializedAs: constants.w }
          mainTexture:     { formerlySerializedAs: seqTexture }
          mainColor:       { formerlySerializedAs: weight }
  - name: transparent
    passes:
    - vert: unlit-vs:vert
      frag: unlit-fs:frag
      depthStencilState: &d1
        depthTest: true
        depthWrite: false
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendDstAlpha: one_minus_src_alpha
      properties: *props
      migrations: *migs
  - name: add
    passes:
    - vert: unlit-vs:vert
      frag: unlit-fs:frag
      rasterizerState: &r1 { cullMode: none }
      depthStencilState: *d1
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one
          blendSrcAlpha: src_alpha
          blendDstAlpha: one
      properties: *props
      migrations: *migs
  - name: alpha-blend
    passes:
    - vert: unlit-vs:vert
      frag: unlit-fs:frag
      rasterizerState: *r1
      depthStencilState: *d1
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendSrcAlpha: src_alpha
          blendDstAlpha: one_minus_src_alpha
      properties: *props
      migrations: *migs
}%

CCProgram unlit-vs %{
  precision highp float;
  #include <legacy/input>
  #include <builtin/uniforms/cc-global>
  #include <legacy/decode-base>
  #include <legacy/local-batch>

  #if USE_VERTEX_COLOR
    in lowp vec4 a_color;
    out lowp vec4 v_color;
  #endif

  #if USE_TEXTURE
    out vec2 v_uv;
    uniform TexCoords {
      vec4 tilingOffset;
    };
    #if USE_SEQUENCE_ANIM
      uniform SeqAnimConstants {
        vec4 seqAnimParams;
      };
    #endif
  #endif

  vec4 vert () {
    vec4 position;
    CCVertInput(position);

    mat4 matWorld;
    CCGetWorldMatrix(matWorld);

    #if USE_TEXTURE
      v_uv = a_texCoord;
      #if FLIP_UV
        v_uv.y = 1.0 - v_uv.y;
      #endif
      v_uv = v_uv * tilingOffset.xy + tilingOffset.zw;
      #if USE_SEQUENCE_ANIM
        #if MANUAL_PLAYBACK
          float seqAnimCurFrame = clamp(seqAnimParams.w, 0.0, 0.999) * seqAnimParams.z;
        #else
          float seqAnimCurFrame = mod(cc_time.x, seqAnimParams.z / seqAnimParams.w) * seqAnimParams.w; // iOS precision issue
        #endif
        vec2 seqAnimOffset = floor(vec2(mod(seqAnimCurFrame, seqAnimParams.x), seqAnimCurFrame / seqAnimParams.x));
        v_uv = (v_uv + seqAnimOffset) / seqAnimParams.xy;
      #endif
    #endif

    #if USE_VERTEX_COLOR
      v_color = a_color;
    #endif

    return cc_matProj * (cc_matView * matWorld) * position;
  }
}%

CCProgram unlit-fs %{
  precision highp float;
  #include <legacy/output>

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

  #if USE_TEXTURE
    in vec2 v_uv;
    uniform sampler2D mainTexture;
  #endif

  uniform Constant {
    vec4 mainColor;
    vec4 colorScaleAndCutoff;
  };

  #if USE_VERTEX_COLOR
    in lowp vec4 v_color;
  #endif

  vec4 frag () {
    vec4 o = mainColor;
    o.rgb *= colorScaleAndCutoff.xyz;

    #if USE_VERTEX_COLOR
      o *= v_color;
    #endif

    #if USE_TEXTURE
      o *= texture(mainTexture, v_uv);
    #endif

    #if USE_ALPHA_TEST
      if (o.ALPHA_TEST_CHANNEL < colorScaleAndCutoff.w) discard;
    #endif

    return CCFragOutput(o);
  }
}%