TiledTileSet does not load multi-image set correctly

[MM1nd]

Symptom

public inline function hasGid(Gid:Int):Bool
{
	return (Gid >= firstGID) && Gid < (firstGID + numTiles);
}

is used to load the tilemap and always returns false because numTiles==0.

Cause

numTiles is calculated like this:

if (tileWidth > 0 && tileHeight > 0)
{
	numRows = Std.int(imgHeight / tileHeight);
	numCols = Std.int(imgWidth / tileWidth);
	numTiles = numRows * numCols;
}

this might work for single image tilesets (I did not test that, but I suspect that is the case that was tested when writing this code). It does not work for this simple tileset:

<?xml version="1.0" encoding="UTF-8"?>
<tileset version="1.10" tiledversion="1.11.2" name="tileset" tilewidth="111" tileheight="128" tilecount="2" columns="0">
 <grid orientation="orthogonal" width="1" height="1"/>
 <tile id="0">
  <image source="../images/blue.png" width="111" height="128"/>
 </tile>
 <tile id="1">
  <image source="../images/green.png" width="111" height="128"/>
 </tile>
</tileset>

The loading code looks for imgWidth and imgHeight in what it assumes to be the image node but will be a tile node. That is, we are in the else case of this code:

if (source.hasNode.image)
{
	// single image
	node = source.node.image;
	imageSource = node.att.source;
}
else
{
	// several images
	node = source.node.tile;

Note that even if we would take width and hight from the image nodes, that would not make the calculation of numTiles correct. The code is simply not equipped to deal with this case at all.