Always convert paths to full UNC paths. Refs #177

* This avoids ambiguity/possible change between a mapped network drive
  like Z:\ and the UNC path \\hostname\foo\bar\

renderdocui/Code/Helpers.cs

@@ -187,9 +187,9 @@ namespace renderdocui.Code
             RefreshAssociations();
         }
 
-        private static string GetVulkanJSONPath(bool wow6432)
+        public static string GetVulkanJSONPath(bool wow6432)
         {
-            string basepath = Path.GetDirectoryName(Application.ExecutablePath);
+            string basepath = Win32PInvoke.GetUniversalName(Path.GetDirectoryName(Application.ExecutablePath));
             if (wow6432)
                 basepath = Path.Combine(basepath, "x86");
 

renderdocui/Code/Win32PInvoke.cs

@@ -117,5 +117,40 @@ namespace renderdocui.Code
 
             return new string(buffer);
         }
+
+        [DllImport("mpr.dll", CharSet = CharSet.Unicode)]
+        private static extern uint WNetGetUniversalNameW(string lpLocalPath, int dwInfoLevel, IntPtr lpBuffer, ref int lpBufferSize);
+        private const int UNIVERSAL_NAME_INFO_LEVEL = 0x00000001;
+        private const uint ERROR_MORE_DATA = 234;
+
+        public static string GetUniversalName(string localPath)
+        {
+            int size = 0;
+
+            IntPtr buf = (IntPtr)IntPtr.Size; // don't initialise to zero, as otherwise the call fails
+
+            uint ret = WNetGetUniversalNameW(localPath, UNIVERSAL_NAME_INFO_LEVEL, buf, ref size);
+
+            if (ret != ERROR_MORE_DATA)
+                return localPath;
+
+            buf = Marshal.AllocHGlobal(size);
+
+            ret = WNetGetUniversalNameW(localPath, UNIVERSAL_NAME_INFO_LEVEL, buf, ref size);
+
+            string universalPath = localPath;
+
+            if (ret == 0)
+            {
+                // buf points to a struct that contains just a string pointer, that points
+                // immediately after it. So we need to advance by one IntPtr to get to the
+                // actual string
+                universalPath = Marshal.PtrToStringUni(IntPtr.Add(buf, IntPtr.Size));
+            }
+
+            Marshal.FreeHGlobal(buf);
+
+            return universalPath;
+        }
     }
 }

renderdocui/Windows/Dialogs/CaptureDialog.cs

@@ -904,7 +904,7 @@ namespace renderdocui.Windows.Dialogs
 
             Helpers.CheckVulkanLayerRegistration(out hasOtherJSON, out thisRegistered, out otherJSONs);
 
-            string myJSON = Path.GetDirectoryName(Application.ExecutablePath) + Path.DirectorySeparatorChar + "renderdoc.json";
+            string myJSON = Helpers.GetVulkanJSONPath(false);
 
             string msg = "Vulkan capture happens through the API's layer mechanism. RenderDoc has detected that ";
 
@@ -938,7 +938,7 @@ namespace renderdocui.Windows.Dialogs
             {
                 msg += "Register: " + myJSON + "\n";
                 if (Environment.Is64BitProcess)
-                    msg += "Register: " + myJSON.Replace("renderdoc.json", @"x86\renderdoc.json") + "\n";
+                    msg += "Register: " + Helpers.GetVulkanJSONPath(true) + "\n";
                 msg += "\n";
             }