Issue with Pixel in Canvas

[micah-williamson]

Offending lines-

Canny calls _traverseEdge.

  Canny.prototype._traverseEdge = function(current, imgData, threshold, traversed) {
    
    ...

    var neighbors = getEdgeNeighbors(current, imgData, threshold, traversed);

    ...

  };

Which called getEdgeNeighbors in the helpers.

  exports.getEdgeNeighbors = function(i, imgData, threshold, includedEdges) {
    var neighbors = [],
        pixel = new Pixel(i, imgData.width, imgData.height);
    for(var j = 0; j < pixel.neighbors.length; j++)
      if(imgData.data[pixel.neighbors[j]] >= threshold && (includedEdges === undefined || includedEdges.indexOf(pixel.neighbors[j]) === -1))
        neighbors.push(pixel.neighbors[j]);

    return neighbors;
  };

Which constructs a new pixel with the pixel index, and the x/y coords. This is defined in cabbage.min.js (which is minified! why??)

And blows up on e.shift

    function b(a,b,e){var f=this;this.x=a,this.y=b,this.neighbors={},e&&d.forEach(function(a){f[a]=e.shift()}),

b is the Pixel constructor. a is the pixel index, b is the x coord, and e is the y coord.

Foreach item in d ('r', 'g', 'b', 'a') it calls e.shift- which is a number and does not have a shift method.

Could you tell me where the source to this stuff is? Minified code makes it difficult to debug :)

[Tiantian-kaixin]

(e instanceof Array) && d.forEach(function(a) {
f[a] = e.shift()
});