// Constructors, Finalizer and Dispose
//======================================================================
public CollectionImageTileBuilder(Collection collection, ImageRequest imageRequest,
int maxLevel, int tilePixelDimension)
{
m_collection = collection;
m_level = imageRequest.Level;
m_tilePixelDimension = tilePixelDimension;
m_imageDimensionCount = (1 << (maxLevel - imageRequest.Level));
m_levelBitCount = maxLevel - imageRequest.Level;
int mortonRange;
m_mortonStart = MortonHelpers.LevelXYToMorton(imageRequest.Level, imageRequest.X, imageRequest.Y,
maxLevel, out mortonRange);
}
public void ServeImageTile(HttpContext context)
{
ImageRequest request = new ImageRequest(context.Request.Url);
Collection collection = m_collectionCache.Get(request.DzcName);
if (null == collection)
{
//TODO: Draw this message onto an image tile so it can be seen in Pivot.
context.Response.StatusCode = (int)HttpStatusCode.NotFound;
context.Response.StatusDescription = "Pivot image not found. Cache may have expired.";
return;
}
CollectionImageTileBuilder builder = new CollectionImageTileBuilder(collection, request,
DzcSerializer.DefaultMaxLevel, DzcSerializer.DefaultTileDimension);
builder.Write(context.Response);
}
