TileCook.Layer.GetTile C# (CSharp) Method

        public byte[] GetTile(Coord coord, string format)
        {
            // Get envelope
            // throws TileOutOfRange exception
            Envelope tileEnvelope = this._gridSet.CoordToEnvelope(coord);

            //TO DO: add filter?

            // Set coord y value
            // must align coord y value origin with gridset
            coord = this._gridSet.SetY(coord);

            //TO DO: add filter

            byte[] img = null;

            // Get tile from cache?
            if (this.Cache != null)
                img = this.Cache.Get(coord, format);

            // Get tile from provider ?
            if (img == null)
            {
                if (this.Provider is IEnvelopeProvider)
                {
                    IEnvelopeProvider provider = (IEnvelopeProvider)this.Provider;
                    img = provider.Render(tileEnvelope, format, this._gridSet.TileWidth, this._gridSet.TileHeight);
                }
                else if (this.Provider is IPassThoughProvider)
                {
                    IPassThoughProvider provider = (IPassThoughProvider)this.Provider;
                    img = provider.Render(coord, format, this._gridSet.TileWidth, this._gridSet.TileHeight);
                }
                else
                {
                    throw new InvalidOperationException("Unexpected provider type");
                }

                // Put tile in cache?
                if (this.Cache != null && this._cacheFitler.IsValid(coord.Z, tileEnvelope, format))
                {
                    this.Cache.Put(coord, format, img);
                }
            }
            return img;
        }