Re-enabled terrain texture generation for the world map. Adam can clean up/ sort it out when he gets time.

Most likely doesn't really work in grid mode as the generated textures are marked as temporary and I don't think they are updated to the asset server. We have to either live with these textures being sent to the asset server, and manually clean them out from time to time or wait until there is some asset management system in place. 
Also currently the texture is only generated at region startup, it is not updated after terraforming. 

5 files changed, 80 insertions, 13 deletions

diff --git a/OpenSim/Region/Environment/Interfaces/ITerrain.cs b/OpenSim/Region/Environment/Interfaces/ITerrain.cs
index d3070b2..2cef17e 100644
--- a/OpenSim/Region/Environment/Interfaces/ITerrain.cs
+++ b/OpenSim/Region/Environment/Interfaces/ITerrain.cs
@@ -70,4 +70,9 @@ namespace OpenSim.Region.Environment.Interfaces
         void ExportImage(string filename, string gradientmap);
         byte[] ExportJpegImage(string gradientmap);
     }
+
+    public interface ITerrainTemp
+    {
+        byte[] WriteJpegImage(string gradientmap);
+    }
 }
diff --git a/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs b/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
index c8b9c98..0db1294 100644
--- a/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
+++ b/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
@@ -35,5 +35,6 @@ namespace OpenSim.Region.Environment.Interfaces
         float[] GetFloatsSerialised();
         double[,] GetDoubles();
         bool Tainted(int x, int y);
+        ITerrainChannel MakeCopy();
     }
 }
diff --git a/OpenSim/Region/Environment/Modules/Terrain/TerrainChannel.cs b/OpenSim/Region/Environment/Modules/Terrain/TerrainChannel.cs
index 4ab7782..74af2c1 100644
--- a/OpenSim/Region/Environment/Modules/Terrain/TerrainChannel.cs
+++ b/OpenSim/Region/Environment/Modules/Terrain/TerrainChannel.cs
@@ -56,6 +56,14 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             return copy;
         }
 
+        public ITerrainChannel MakeCopy()
+        {
+            TerrainChannel copy = new TerrainChannel(false);
+            copy.map = (double[,])this.map.Clone();
+
+            return copy;
+        } 
+
         public float[] GetFloatsSerialised()
         {
             float[] heights = new float[Width * Height];
diff --git a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
index cdcc648..742ea5b 100644
--- a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
@@ -27,15 +27,17 @@
 
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using libsecondlife;
 using Nini.Config;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Scenes;
 
+
 namespace OpenSim.Region.Environment.Modules.Terrain
 {
-    public class TerrainModule : IRegionModule
+    public class TerrainModule : IRegionModule , ITerrainTemp
     {
         public enum StandardTerrainEffects : byte
         {
@@ -139,6 +141,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
         public void Initialise(Scene scene, IConfigSource config)
         {
             m_scene = scene;
+            m_scene.RegisterModuleInterface<ITerrainTemp>(this);
             m_gConfig = config;
 
             // Install terrain module in the simulator
@@ -312,6 +315,51 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             }
         }
 
+        public byte[] WriteJpegImage(string gradientmap)
+        {
+            byte[] imageData = null;
+            try
+            {
+                Bitmap bmp = TerrainToBitmap(gradientmap);
+
+                imageData = OpenJPEGNet.OpenJPEG.EncodeFromImage(bmp, true);
+                
+            }
+            catch (Exception e) // LEGIT: Catching problems caused by OpenJPEG p/invoke
+            {
+                Console.WriteLine("Failed generating terrain map: " + e.ToString());
+            }
+
+            return imageData;
+        }
+
+        private Bitmap TerrainToBitmap(string gradientmap)
+        {
+            Bitmap gradientmapLd = new Bitmap(gradientmap);
+
+            int pallete = gradientmapLd.Height;
+
+            Bitmap bmp = new Bitmap(m_channel.Width, m_channel.Height);
+            Color[] colours = new Color[pallete];
+
+            for (int i = 0; i < pallete; i++)
+            {
+                colours[i] = gradientmapLd.GetPixel(0, i);
+            }
+
+            TerrainChannel copy =(TerrainChannel) m_channel.MakeCopy();
+            for (int y = 0; y < copy.Height; y++)
+            {
+                for (int x = 0; x < copy.Width; x++)
+                {
+                    // 512 is the largest possible height before colours clamp
+                    int colorindex = (int)(Math.Max(Math.Min(1.0, copy[x, y] / 512.0), 0.0) * (pallete - 1));
+                    bmp.SetPixel(x, copy.Height - y - 1, colours[colorindex]);
+                }
+            }
+            return bmp;
+        }
+
         public void PostInitialise()
         {
             InstallDefaultEffects();
diff --git a/OpenSim/Region/Environment/Scenes/Scene.cs b/OpenSim/Region/Environment/Scenes/Scene.cs
index b8a4831..c07f718 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.cs
@@ -946,6 +946,7 @@ namespace OpenSim.Region.Environment.Scenes
                 {
                     Heightmap = new Modules.Terrain.TerrainChannel(map);
                 }
+               
             }
             catch (Exception e)
             {
@@ -981,19 +982,23 @@ namespace OpenSim.Region.Environment.Scenes
         public void CreateTerrainTexture(bool temporary)
         {
             //TODOADAM: Move this to TerrainModule
-            /*
+          
             //create a texture asset of the terrain 
-            byte[] data = Terrain.WriteJpegImage("defaultstripe.png");
-            m_regInfo.EstateSettings.terrainImageID = LLUUID.Random();
-            AssetBase asset = new AssetBase();
-            asset.FullID = m_regInfo.EstateSettings.terrainImageID;
-            asset.Data = data;
-            asset.Name = "terrainImage";
-            asset.Description = RegionInfo.RegionName;
-            asset.Type = 0;
-            asset.Temporary = temporary;
-            AssetCache.AddAsset(asset);
-            */
+            ITerrainTemp terrain = RequestModuleInterface<ITerrainTemp>();
+            if (terrain != null)
+            {
+                byte[] data = terrain.WriteJpegImage("defaultstripe.png");
+                m_regInfo.EstateSettings.terrainImageID = LLUUID.Random();
+                AssetBase asset = new AssetBase();
+                asset.FullID = m_regInfo.EstateSettings.terrainImageID;
+                asset.Data = data;
+                asset.Name = "terrainImage";
+                asset.Description = RegionInfo.RegionName;
+                asset.Type = 0;
+                asset.Temporary = temporary;
+                AssetCache.AddAsset(asset);
+            }
+            
         }
 
         #endregion