public override ICollection <ImageData> LoadImages()
        {
            // Error when suspended
            if (issuspended)
            {
                throw new Exception("Data reader is suspended");
            }

            List <ImageData> images = new List <ImageData>();

            foreach (Tile t in artfile.Tiles.Values)
            {
                ARTImage img = new ARTImage(t);
                images.Add(img);
            }

            // Add images to the container-specific texture set
            foreach (ImageData img in images)
            {
                textureset.AddImage(img);
            }

            // Done
            return(images);
        }
        public override ICollection <ImageData> LoadImages()
        {
            // Error when suspended
            if (issuspended)
            {
                throw new Exception("Data reader is suspended");
            }

            List <ImageData> images = new List <ImageData>();

            // Find TILES###.ART lumps
            Dictionary <int, Lump> artlumps    = new Dictionary <int, Lump>();
            List <int>             artlumpnums = new List <int>();

            foreach (var l in lumps)
            {
                if (artfile.IsMatch(l.Name))
                {
                    // Get art number
                    int num;
                    int.TryParse(l.Name.Substring(5, 3), NumberStyles.Integer, CultureInfo.InvariantCulture, out num);

                    if (artlumps.ContainsKey(num))
                    {
                        General.ErrorLogger.Add(ErrorType.Error, "ART file \"" + l.Name + "\" is double-defined in resource \"" + location.location + "\"");
                    }
                    else
                    {
                        artlumps.Add(num, l);
                        artlumpnums.Add(num);
                    }
                }
            }

            // No ART lumps?
            if (artlumps.Count == 0)
            {
                return(images);
            }

            // Check sequentiality
            artlumpnums.Sort();
            List <int> validartlumpnums = new List <int>();

            for (int i = 0; i < artlumpnums.Count - 1; i++)
            {
                validartlumpnums.Add(artlumpnums[i]);
                if (artlumpnums[i + 1] - 1 != artlumpnums[i])
                {
                    General.ErrorLogger.Add(ErrorType.Error, "GRP file \"" + location.location + "\" contains inconsistently named ART files (\"TILES" + artlumpnums[i].ToString("D3") + ".ART\" file is missing)");
                    break;
                }
            }

            // Create Art readers
            foreach (int i in validartlumpnums)
            {
                ART art = new ART(artlumps[i].Name);
                if (art.Create(artlumps[i].Stream))
                {
                    artfiles.Add(art);
                }
            }

            // Load textures
            foreach (ART art in artfiles)
            {
                foreach (Tile t in art.Tiles.Values)
                {
                    ARTImage img = new ARTImage(t);
                    images.Add(img);
                }
            }

            // Add images to the container-specific texture set
            foreach (ImageData img in images)
            {
                textureset.AddImage(img);
            }

            // Done
            return(images);
        }