[Direct3D11.Effects] Added HasSignature Property on EffectPassDescrip…

…tion

[D3DCompiler] Added LastErrorString property on function linking graph

Source/SharpDX.D3DCompiler/FunctionLinkingGraph.cs

@@ -104,6 +104,15 @@ public ModuleInstance CreateModuleInstance()
             return module;
         }
 
+        /// <summary>
+        /// Gets the error from the last function call of the function-linking-graph, as a string
+        /// </summary>
+        public string LastErrorString
+        {
+            get { return Utilities.BlobToString(this.LastError);  }
+        }
+
+
         /// <summary>	
         /// <p>[This documentation is preliminary and is subject to change.]</p><p>Creates a call-function linking node to use in the function-linking-graph.</p>	
         /// </summary>	

Source/SharpDX.Direct3D11.Effects/EffectPassDescription.cs

@@ -34,6 +34,14 @@ public ShaderBytecode Signature
                 return new ShaderBytecode(this.PIAInputSignature, this.IAInputSignatureSize);
             }
         }
+
+        /// <summary>
+        /// Returns true if this Effect pass has a Signature (eg: if a VertexShader or Geometry Shader is present), false otherwise
+        /// </summary>
+        public bool HasSignature
+        {
+            get { return this.PIAInputSignature != System.IntPtr.Zero; }
+        }
     }
 }
 #endif