Implemented osPenCap, that sets EndCap and StartCap to Pen. This allows using arrow, diamond, round and flat caps.

* Made image request safer, if it can't find an image for any reason, draws a square where the image should be and a message alerting the user.

OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs

@@ -443,7 +443,16 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
                     endPoint.X = (int) x;
                     endPoint.Y = (int) y;
                     Image image = ImageHttpRequest(nextLine);
+                    if (image != null)
+                    {
                         graph.DrawImage(image, (float)startPoint.X, (float)startPoint.Y, x, y);
+                    }
+                    else
+                    {
+                        graph.DrawString("URL couldn't be resolved or is", new Font("Arial",6), myBrush, startPoint);
+                        graph.DrawString("not an image. Please check URL.", new Font("Arial", 6), myBrush, new Point(startPoint.X, 12 + startPoint.Y));
+                        graph.DrawRectangle(drawPen, startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
+                    }
                     startPoint.X += endPoint.X;
                     startPoint.Y += endPoint.Y;
                 }
@@ -539,6 +548,57 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
                     float size = Convert.ToSingle(nextLine, CultureInfo.InvariantCulture);
                     drawPen.Width = size;
                 }
+                else if (nextLine.StartsWith("PenCap"))
+                {
+                    bool start = true, end = true;
+                    nextLine = nextLine.Remove(0, 6);
+                    nextLine = nextLine.Trim();
+                    string[] cap = nextLine.Split(partsDelimiter);
+                    if (cap[0].ToLower() == "start")
+                        end = false;
+                    else if (cap[0].ToLower() == "end")
+                        start = false;
+                    else if (cap[0].ToLower() != "both")
+                        return;
+                    string type = cap[1].ToLower();
+                    
+                    if (end)
+                    {
+                        switch (type)
+                        {
+                            case "arrow":
+                                drawPen.EndCap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;
+                                break;
+                            case "round":
+                                drawPen.EndCap = System.Drawing.Drawing2D.LineCap.RoundAnchor;
+                                break;
+                            case "diamond":
+                                drawPen.EndCap = System.Drawing.Drawing2D.LineCap.DiamondAnchor;
+                                break;
+                            case "flat":
+                                drawPen.EndCap = System.Drawing.Drawing2D.LineCap.Flat;
+                                break;
+                        }
+                    }
+                    if (start)
+                    {
+                        switch (type)
+                        {
+                            case "arrow":
+                                drawPen.StartCap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;
+                                break;
+                            case "round":
+                                drawPen.StartCap = System.Drawing.Drawing2D.LineCap.RoundAnchor;
+                                break;
+                            case "diamond":
+                                drawPen.StartCap = System.Drawing.Drawing2D.LineCap.DiamondAnchor;
+                                break;
+                            case "flat":
+                                drawPen.StartCap = System.Drawing.Drawing2D.LineCap.Flat;
+                                break;
+                        }
+                    }
+                }
                 else if (nextLine.StartsWith("PenColour"))
                 {
                     nextLine = nextLine.Remove(0, 9);
@@ -609,6 +669,8 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
         }
 
         private Bitmap ImageHttpRequest(string url)
+        {
+            try
             {
             WebRequest request = HttpWebRequest.Create(url);
 //Ckrinke: Comment out for now as 'str' is unused. Bring it back into play later when it is used.
@@ -619,7 +681,8 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
                     Bitmap image = new Bitmap(response.GetResponseStream());
                     return image;
                 }
-
+            }
+            catch { }
             return null;
         }
     }

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs

@@ -879,6 +879,15 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return drawList;
         }
 
+        public string osSetPenCap(string drawList, string direction, string type)
+        {
+            CheckThreatLevel(ThreatLevel.None, "osSetPenColour");
+
+            m_host.AddScriptLPS(1);
+            drawList += "PenCap " + direction + "," + type + "; ";
+            return drawList;
+        }
+
         public string osDrawImage(string drawList, int width, int height, string imageUrl)
         {
             CheckThreatLevel(ThreatLevel.None, "osDrawImage");

OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs

@@ -101,6 +101,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
         string osSetFontSize(string drawList, int fontSize);
         string osSetPenSize(string drawList, int penSize);
         string osSetPenColour(string drawList, string colour);
+        string osSetPenCap(string drawList, string direction, string type);
         string osDrawImage(string drawList, int width, int height, string imageUrl);
         vector osGetDrawStringSize(string contentType, string text, string fontName, int fontSize);
         void osSetStateEvents(int events);

OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs

@@ -282,6 +282,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
             return m_OSSL_Functions.osSetPenSize(drawList, penSize);
         }
 
+        public string osSetPenCap(string drawList, string direction, string type)
+        {
+            return m_OSSL_Functions.osSetPenCap(drawList, direction, type);
+        }
+
         public string osSetPenColour(string drawList, string colour)
         {
             return m_OSSL_Functions.osSetPenColour(drawList, colour);