From: Christopher Yeoh <yeohc@au1.ibm.com>

The attached patch implements osGetDrawStringSize that looks like:

vector osGetDrawStringSize(string contentType, string text, string
fontName, int fontSize)

in LSL. It is meant to be used in conjunction with the osDraw*
functions. It returns accurate information on the size that a given
string will be rendered given the specified font and font size.
This allows for nicely formatted and positioned text on the generated
image.

3 files changed, 25 insertions, 0 deletions

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 564648b..597592d 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -677,6 +677,24 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return drawList;
         }
 
+        public LSL_Vector osGetDrawStringSize(string contentType, string text, string fontName, int fontSize)
+        {
+            CheckThreatLevel(ThreatLevel.VeryLow, "osGetDrawStringSize");
+            m_host.AddScriptLPS(1);
+
+            LSL_Vector vec = new LSL_Vector(0,0,0);
+            IDynamicTextureManager textureManager = World.RequestModuleInterface<IDynamicTextureManager>();
+            if (textureManager != null) 
+            {
+                double xSize, ySize;
+                textureManager.GetDrawStringSize(contentType, text, fontName, fontSize,
+                                                 out xSize, out ySize);
+                vec.x = xSize;
+                vec.y = ySize;
+            }
+            return vec;
+        }
+
         public void osSetStateEvents(int events)
         {
             // This function is a hack. There is no reason for it's existence
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
index 72bb60c..1150d76 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
@@ -88,6 +88,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
         string osSetPenSize(string drawList, int penSize);
         string osSetPenColour(string drawList, string colour);
         string osDrawImage(string drawList, int width, int height, string imageUrl);
+        vector osGetDrawStringSize(string contentType, string text, string fontName, int fontSize);
         void osSetStateEvents(int events);
 
         double osList2Double(LSL_Types.list src, int index);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
index a92f046..6ba8b20 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
@@ -212,6 +212,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
         {
             return m_OSSL_Functions.osDrawImage(drawList, width, height, imageUrl);
         }
+
+        public vector osGetDrawStringSize(string contentType, string text, string fontName, int fontSize)
+        {
+            return m_OSSL_Functions.osGetDrawStringSize(contentType, text, fontName, fontSize);
+        }
+
         public void osSetStateEvents(int events)
         {
             m_OSSL_Functions.osSetStateEvents(events);