* Allow terrain load-tile for RAW files

* Patch from Sophie Lee [webmage] - IBM.  Thanks very much!

OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs

@@ -609,6 +609,10 @@ namespace OpenSim.Region.Terrain
                                 LoadFromFileF32(args[2], Convert.ToInt32(args[3]), Convert.ToInt32(args[4]),
                                                 Convert.ToInt32(args[5]), Convert.ToInt32(args[6]));
                                 break;
+                            case "raw":
+                                LoadFromFileSLRAW(args[2], Convert.ToInt32(args[3]), Convert.ToInt32(args[4]),
+                                                Convert.ToInt32(args[5]), Convert.ToInt32(args[6]));
+                                break;
                             case "img":
                                 LoadFromFileIMG(args[2], Convert.ToInt32(args[3]), Convert.ToInt32(args[4]),
                                                 Convert.ToInt32(args[5]), Convert.ToInt32(args[6]));
@@ -961,6 +965,58 @@ namespace OpenSim.Region.Terrain
             tainted++;
         }
 
+        /// <summary>
+        /// Loads a section of a larger heightmap (RAW)
+        /// </summary>
+        /// <param name="filename">File to load</param>
+        /// <param name="dimensionX">Size of the file</param>
+        /// <param name="dimensionY">Size of the file</param>
+        /// <param name="lowerboundX">Where do the region coords start for this terrain?</param>
+        /// <param name="lowerboundY">Where do the region coords start for this terrain?</param>
+        public void LoadFromFileSLRAW(string filename, int dimensionX, int dimensionY, int lowerboundX, int lowerboundY)
+        {
+            // TODO: Mutex fails to release readlock on folder! --> only one file can be loaded into sim
+            //fileIOLock.WaitOne();
+            //try
+            //{
+                int sectionToLoadX = ((offsetX - lowerboundX)*w);
+                int sectionToLoadY = ((offsetY - lowerboundY)*h);
+
+                double[,] tempMap = new double[dimensionX,dimensionY];
+
+                FileInfo file = new FileInfo(filename);
+                FileStream s = file.Open(FileMode.Open, FileAccess.Read);
+                BinaryReader bs = new BinaryReader(s);
+
+                int x, y;
+                for (x = 0; x < dimensionX; x++)
+                {
+                    for (y = 0; y < dimensionY; y++)
+                    {
+                        tempMap[x, y] = (double) bs.ReadByte()*((double) bs.ReadByte()/127.0);
+                        bs.ReadBytes(11); // Advance the stream to next bytes.
+                    }
+                }
+
+                for (y = 0; y < h; y++)
+                {
+                    for (x = 0; x < w; x++)
+                    {
+                        heightmap.Set(x, y, tempMap[x + sectionToLoadX, y + sectionToLoadY]);
+                    }
+                }
+
+                bs.Close();
+                s.Close();
+
+                tainted++;
+            //}
+            //finally
+            //{
+            //    fileIOLock.ReleaseMutex();
+            //}
+        }
+
         /// <summary>
         /// Writes the current terrain heightmap to disk, in the format of a 65536 entry double[] array.
         /// </summary>