* Allow terrains to be loaded and saved from streams as well as directly to and from files

* Should be making use of this in the next revisions

9 files changed, 179 insertions, 44 deletions

diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/BMP.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/BMP.cs
index 98d69a5..34bbf78 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/BMP.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/BMP.cs
@@ -24,8 +24,10 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -49,6 +51,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Bmp);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public override void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateGrayscaleBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Png);
+        }         
 
         /// <summary>
         /// The human readable version of the file format(s) this loader handles
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GIF.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GIF.cs
index 9bfe851..0cd9000 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GIF.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GIF.cs
@@ -24,8 +24,10 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -38,6 +40,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Gif);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public override void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateGrayscaleBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Gif);
+        }             
 
         public override string ToString()
         {
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GenericSystemDrawing.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GenericSystemDrawing.cs
index f87d3ee..4d213e0 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GenericSystemDrawing.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/GenericSystemDrawing.cs
@@ -28,6 +28,7 @@
 using System;
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -57,26 +58,34 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
         /// <returns>A terrain channel generated from the image.</returns>
         public virtual ITerrainChannel LoadFile(string filename)
         {
-            Bitmap file = new Bitmap(filename);
+            return LoadBitmap(new Bitmap(filename));            
+        }
 
-            ITerrainChannel retval = new TerrainChannel(file.Width, file.Height);
+        public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
+        {
+            throw new NotImplementedException();
+        }
+        
+        public virtual ITerrainChannel LoadStream(Stream stream)
+        {
+            return LoadBitmap(new Bitmap(stream));
+        }
+        
+        protected virtual ITerrainChannel LoadBitmap(Bitmap bitmap)
+        {
+            ITerrainChannel retval = new TerrainChannel(bitmap.Width, bitmap.Height);
 
             int x;
-            for (x = 0; x < file.Width; x++)
+            for (x = 0; x < bitmap.Width; x++)
             {
                 int y;
-                for (y = 0; y < file.Height; y++)
+                for (y = 0; y < bitmap.Height; y++)
                 {
-                    retval[x, y] = file.GetPixel(x, file.Height - y - 1).GetBrightness() * 128;
+                    retval[x, y] = bitmap.GetPixel(x, bitmap.Height - y - 1).GetBrightness() * 128;
                 }
             }
 
-            return retval;
-        }
-
-        public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
-        {
-            throw new NotImplementedException();
+            return retval;            
         }
 
         /// <summary>
@@ -90,6 +99,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Png);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public virtual void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateGrayscaleBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Png);
+        }        
 
         #endregion
 
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/JPEG.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/JPEG.cs
index 628c201..9886b81 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/JPEG.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/JPEG.cs
@@ -28,6 +28,7 @@
 using System;
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -50,6 +51,11 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
         {
             throw new NotImplementedException();
         }
+        
+        public ITerrainChannel LoadStream(Stream stream)
+        {
+            throw new NotImplementedException();
+        }        
 
         public void SaveFile(string filename, ITerrainChannel map)
         {
@@ -57,6 +63,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Jpeg);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Jpeg);
+        }        
 
         #endregion
 
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/LLRAW.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/LLRAW.cs
index 85afaf8..d8d0648 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/LLRAW.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/LLRAW.cs
@@ -71,10 +71,24 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
         public ITerrainChannel LoadFile(string filename)
         {
-            TerrainChannel retval = new TerrainChannel();
-
             FileInfo file = new FileInfo(filename);
             FileStream s = file.Open(FileMode.Open, FileAccess.Read);
+            ITerrainChannel retval = LoadStream(s);
+            
+            s.Close();
+
+            return retval;
+        }
+
+        public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
+        {
+            throw new NotImplementedException();
+        }
+        
+        public ITerrainChannel LoadStream(Stream s)
+        {            
+            TerrainChannel retval = new TerrainChannel();
+            
             BinaryReader bs = new BinaryReader(s);
             int y;
             for (y = 0; y < retval.Height; y++)
@@ -87,21 +101,22 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
                 }
             }
 
-            bs.Close();
-            s.Close();
-
+            bs.Close();  
+            
             return retval;
         }
 
-        public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
-        {
-            throw new NotImplementedException();
-        }
-
         public void SaveFile(string filename, ITerrainChannel map)
         {
             FileInfo file = new FileInfo(filename);
             FileStream s = file.Open(FileMode.CreateNew, FileAccess.Write);
+            SaveStream(s, map);
+
+            s.Close();
+        }
+        
+        public void SaveStream(Stream s, ITerrainChannel map)
+        {
             BinaryWriter binStream = new BinaryWriter(s);
 
             // Output the calculated raw
@@ -150,11 +165,9 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
                 }
             }
 
-            binStream.Close();
-            s.Close();
+            binStream.Close();            
         }
-
-
+        
         public string FileExtension
         {
             get { return ".raw"; }
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/PNG.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/PNG.cs
index b893f70..cf95486 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/PNG.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/PNG.cs
@@ -24,8 +24,10 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -38,6 +40,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Png);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public override void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateGrayscaleBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Png);
+        }         
 
         public override string ToString()
         {
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/RAW32.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/RAW32.cs
index 689abcf..bb8b0f7 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/RAW32.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/RAW32.cs
@@ -41,22 +41,10 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
         public ITerrainChannel LoadFile(string filename)
         {
-            TerrainChannel retval = new TerrainChannel();
-
             FileInfo file = new FileInfo(filename);
             FileStream s = file.Open(FileMode.Open, FileAccess.Read);
-            BinaryReader bs = new BinaryReader(s);
-            int y;
-            for (y = 0; y < retval.Height; y++)
-            {
-                int x;
-                for (x = 0; x < retval.Width; x++)
-                {
-                    retval[x, y] = bs.ReadSingle();
-                }
-            }
+            ITerrainChannel retval = LoadStream(s);
 
-            bs.Close();
             s.Close();
 
             return retval;
@@ -124,11 +112,38 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             return retval;
         }
+        
+        public ITerrainChannel LoadStream(Stream s)
+        {
+            TerrainChannel retval = new TerrainChannel();
+            
+            BinaryReader bs = new BinaryReader(s);
+            int y;
+            for (y = 0; y < retval.Height; y++)
+            {
+                int x;
+                for (x = 0; x < retval.Width; x++)
+                {
+                    retval[x, y] = bs.ReadSingle();
+                }
+            }
 
+            bs.Close();
+            
+            return retval;
+        }
+            
         public void SaveFile(string filename, ITerrainChannel map)
         {
             FileInfo file = new FileInfo(filename);
             FileStream s = file.Open(FileMode.Create, FileAccess.Write);
+            SaveStream(s, map);
+
+            s.Close();
+        }
+        
+        public void SaveStream(Stream s, ITerrainChannel map)
+        {
             BinaryWriter bs = new BinaryWriter(s);
 
             int y;
@@ -141,8 +156,7 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
                 }
             }
 
-            bs.Close();
-            s.Close();
+            bs.Close();            
         }
 
         #endregion
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/TIFF.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/TIFF.cs
index c081aea..3f98f40 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/TIFF.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/TIFF.cs
@@ -24,8 +24,10 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
@@ -38,6 +40,18 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
             colours.Save(filename, ImageFormat.Tiff);
         }
+        
+        /// <summary>
+        /// Exports a stream using a System.Drawing exporter.
+        /// </summary>
+        /// <param name="stream">The target stream</param>
+        /// <param name="map">The terrain channel being saved</param>
+        public override void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            Bitmap colours = CreateGrayscaleBitmapFromMap(map);
+
+            colours.Save(stream, ImageFormat.Tiff);
+        }         
 
         public override string ToString()
         {
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/Terragen.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/Terragen.cs
index fe36cf7..5dc2aa5 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/Terragen.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FileLoaders/Terragen.cs
@@ -43,10 +43,19 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
 
         public ITerrainChannel LoadFile(string filename)
         {
-            TerrainChannel retval = new TerrainChannel();
-
             FileInfo file = new FileInfo(filename);
             FileStream s = file.Open(FileMode.Open, FileAccess.Read);
+            ITerrainChannel retval = LoadStream(s);
+
+            s.Close();
+
+            return retval;
+        }
+        
+        public ITerrainChannel LoadStream(Stream s)
+        {
+            TerrainChannel retval = new TerrainChannel();
+            
             BinaryReader bs = new BinaryReader(s);
 
             bool eof = false;
@@ -98,8 +107,7 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
             }
 
             bs.Close();
-            s.Close();
-
+            
             return retval;
         }
 
@@ -107,6 +115,11 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
         {
             throw new NotImplementedException();
         }
+        
+        public void SaveStream(Stream stream, ITerrainChannel map)
+        {
+            throw new NotImplementedException();
+        }
 
         public string FileExtension
         {