[
  {
    "__type__": "cc.EffectAsset",
    "_name": "builtin-2d-gray-sprite",
    "properties": {
      "texture": {
        "type": 13,
        "value": null
      }
    },
    "techniques": [
      {
        "passes": [
          {
            "cullMode": 0,
            "blend": true,
            "program": "4c10e7ec534d3f65baabc458cc91fd8dfe66821a283acb75aea070ac"
          }
        ],
        "layer": 0,
        "stages": [
          "opaque"
        ],
        "queue": 0,
        "priority": 0
      }
    ],
    "shaders": [
      {
        "vert": "\n#define _IS_VERT_SHADER 1\n\nprecision highp float;\n\nuniform mat4 cc_matViewProj;\nattribute vec3 a_position;\nattribute mediump vec2 a_uv0;\nvarying mediump vec2 v_uv0;\n\nvoid main () {\n  gl_Position = cc_matViewProj * vec4(a_position, 1);\n  v_uv0 = a_uv0;\n}\n\n\n",
        "frag": "\n#define _IS_FRAG_SHADER 1\n\nprecision highp float;\n\nuniform sampler2D texture;\nvarying mediump vec2 v_uv0;\n\nvoid main () {\n  vec4 color = texture2D(texture, v_uv0);\n  #if _USE_ETC1_TEXTURE\n      color.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n  #endif\n  float gray = 0.2126*color.r + 0.7152*color.g + 0.0722*color.b;\n  gl_FragColor = vec4(gray, gray, gray, color.a);\n}\n\n\n",
        "defines": [
          {
            "name": "_USE_ETC1_TEXTURE",
            "type": "boolean",
            "defines": []
          }
        ],
        "uniforms": [
          {
            "name": "texture",
            "type": 13,
            "defines": []
          }
        ],
        "attributes": [
          {
            "name": "a_position",
            "type": 6,
            "defines": []
          },
          {
            "name": "a_uv0",
            "type": 5,
            "defines": []
          }
        ],
        "extensions": [],
        "name": "4c10e7ec534d3f65baabc458cc91fd8dfe66821a283acb75aea070ac"
      }
    ]
  },
  {
    "__type__": "cc.Material",
    "_name": "builtin-2d-gray-sprite",
    "_effectAsset": {
      "__uuid__": "14TDKXr2NJ6LjvHPops74o"
    },
    "_defines": {},
    "_props": {}
  }
]