Merge branch 'uli42-pr/various7' into 3.6.x

Attributes GH PR #1007: https://github.com/ArcticaProject/nx-libs/pull/1007

29 files changed, 493 insertions, 363 deletions

diff --git a/nx-X11/programs/Xserver/composite/compext.c b/nx-X11/programs/Xserver/composite/compext.c
index 8513c6d73..a63b02075 100644
--- a/nx-X11/programs/Xserver/composite/compext.c
+++ b/nx-X11/programs/Xserver/composite/compext.c
@@ -39,6 +39,7 @@ static DevPrivateKeyRec CompositeClientPrivateKeyRec;
 
 #define CompositeClientPrivateKey (&CompositeClientPrivateKeyRec)
 #else /* !defined(NXAGENT_SERVER) */
+#include "../hw/nxagent/Options.h"
 static int CompositeClientPrivIndex = -1;
 #endif /* !defined(NXAGENT_SERVER) */
 
@@ -623,6 +624,11 @@ CompositeExtensionInit (void)
     /* Assume initialization is going to fail */
     noCompositeExtension = TRUE;
 
+#ifdef NXAGENT_SERVER
+    if (!nxagentOption(Composite))
+      return;
+#endif
+
     fprintf(stderr, "COMPOSITE: trying to initialize extension.\n");
 
     for (s = 0; s < screenInfo.numScreens; s++) {
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Args.c b/nx-X11/programs/Xserver/hw/nxagent/Args.c
index 72d6d050c..be13efacd 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Args.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Args.c
@@ -197,10 +197,12 @@ int ddxProcessArgument(int argc, char *argv[], int i)
     nxagentProgName = strdup(basename(basec));
     SAFE_free(basec);
 
+#ifdef X2GO
     /*
      * Check if we are running as X2Go Agent
      */
     checkX2goAgent();
+#endif
   }
 
   #ifdef TEST
@@ -691,6 +693,7 @@ int ddxProcessArgument(int argc, char *argv[], int i)
     {
       SAFE_free(nxagentKeyboard);
 
+#ifdef X2GO
       if (nxagentX2go && strcmp(argv[i], "null/null") == 0)
       {
         #ifdef TEST
@@ -701,6 +704,7 @@ int ddxProcessArgument(int argc, char *argv[], int i)
         nxagentKeyboard = strdup("clone");
       }
       else
+#endif
       {
         nxagentKeyboard = strdup(argv[i]);
       }
@@ -733,6 +737,14 @@ int ddxProcessArgument(int argc, char *argv[], int i)
     return 1;
   }
 
+  /* the composite extension is disabled by default so we provide a
+     way to enable it */
+  if (!strcmp(argv[i], "-composite"))
+  {
+    nxagentChangeOption(Composite, True);
+    return 1;
+  }
+
   if (!strcmp(argv[i], "-nodamage"))
   {
     nxagentChangeOption(UseDamage, False);
@@ -1775,11 +1787,13 @@ N/A
 
     if (*nxagentWindowName == '\0')
     {
-      if(nxagentX2go)
+#ifdef X2GO
+      if (nxagentX2go)
       {
         snprintf(nxagentWindowName, NXAGENTWINDOWNAMELENGTH, "X2Go Agent");
       }
       else
+#endif
       {
         snprintf(nxagentWindowName, NXAGENTWINDOWNAMELENGTH, "NX Agent");
       }
@@ -1870,11 +1884,11 @@ N/A
         fprintf(stderr, "nxagentPostProcessArgs: WARNING! Using backward compatible alpha encoding.\n");
         #endif
 
-        nxagentAlphaCompat = 1;
+        nxagentAlphaCompat = True;
       }
       else
       {
-        nxagentAlphaCompat = 0;
+        nxagentAlphaCompat = False;
       }
 
       nxagentRemoteMajor = remoteMajor;
@@ -1984,16 +1998,16 @@ FIXME: In rootless mode the backing-store support is not functional yet.
 */
     if (nxagentOption(Rootless))
     {
-      enableBackingStore = 0;
+      enableBackingStore = FALSE;
     }
     else if (nxagentOption(BackingStore) == BackingStoreUndefined ||
                  nxagentOption(BackingStore) == BackingStoreForce)
     {
-      enableBackingStore = 1;
+      enableBackingStore = TRUE;
     }
     else if (nxagentOption(BackingStore) == BackingStoreNever)
     {
-      enableBackingStore = 0;
+      enableBackingStore = FALSE;
     }
 
     /*
@@ -2098,9 +2112,13 @@ void ddxUseMsg(void)
   ErrorF("-autodpi               detect real server's DPI and use that in the session\n");
   ErrorF("-display string        display name of the real server\n");
   ErrorF("-sync                  synchronize with the real server\n");
+  ErrorF("-nxrealwindowprop      set property NX_REAL_WINDOW for each X11 window inside nxagent\n");
+  ErrorF("-reportwids            report externally exposed X11 window IDs to the session log\n");
+  ErrorF("-reportprivatewids     report internal X11 window ID to the session log\n");
 #ifdef RENDER
   ErrorF("-norender              disable the use of the render extension\n");
-  ErrorF("-nocomposite           disable the use of the composite extension\n");
+  ErrorF("-nocomposite           disable the use of the composite extension (default)\n");
+  ErrorF("-composite             enable the use of the composite extension\n");
 #endif
   ErrorF("-nopersistent          disable disconnection/reconnection to the X display on SIGHUP\n");
   ErrorF("-noshmem               disable use of shared memory extension\n");
@@ -2114,6 +2132,7 @@ void ddxUseMsg(void)
   ErrorF("-irlimit               maximum image data rate to the encoder input in kB/s.\n");
   ErrorF("-tile WxH              maximum size of image tiles (minimum allowed: 32x32)\n");
   ErrorF("-keystrokefile file    file with keyboard shortcut definitions\n");
+  ErrorF("-options file|string   path to an options file or an option string (for testing/debugging)\n");
   ErrorF("-verbose               print more warning and error messages\n");
   ErrorF("-D                     enable desktop mode\n");
   ErrorF("-R                     enable rootless mode\n");
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Atoms.c b/nx-X11/programs/Xserver/hw/nxagent/Atoms.c
index ea7ad7599..2ddf87e55 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Atoms.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Atoms.c
@@ -89,9 +89,12 @@ static char *nxagentAtomNames[NXAGENT_NUMBER_OF_ATOMS + 1] =
   "WM_NX_READY",                 /*  3 */
       /* nxagent takes the ownership of the selection with this name
          to signal the nxclient (or any other watching program)
-         it is ready. */
+         it is ready. This is only used if NXAGENT_ONSTART is defined.
+         We cannot enclose it in #ifdef here because we use the numeric
+         indices to this structure at multiple places. */
   "MCOPGLOBALS",                 /*  4 */
-      /* used for artsd support. */
+      /* used for artsd support. Only used if compiled with
+         NXAGENT_ARTSD */
   "NX_CUT_BUFFER_SERVER",        /*  5 */
       /* this is the name of a property on nxagent's window on the
          real X server. This property is used for passing clipboard
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
index 8ac2241a6..22fc96f4f 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
@@ -2237,6 +2237,7 @@ Bool nxagentInitClipboard(WindowPtr pWin)
     nxagentXFixesInfo.Initialized = True;
   }
 
+#ifdef NXAGENT_ONSTART
   /*
      The first paste from CLIPBOARD did not work directly after
      session start. Removing this code makes it work. It is unsure why
@@ -2247,6 +2248,7 @@ Bool nxagentInitClipboard(WindowPtr pWin)
 
   if (nxagentSessionId[0])
   {
+    // nxagentAtoms[10] is the CLIPBOARD atom
     #ifdef TEST
     fprintf(stderr, "%s: setting the ownership of %s to %lx"
                 " and registering for PropertyChangeMask events\n", __func__,
@@ -2258,6 +2260,7 @@ Bool nxagentInitClipboard(WindowPtr pWin)
     nxagentChangeWindowAttributes(pWin, CWEventMask);
   }
   */
+#endif
 
   if (nxagentReconnectTrap)
   {
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Composite.c b/nx-X11/programs/Xserver/hw/nxagent/Composite.c
index 745696219..9e14a82bb 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Composite.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Composite.c
@@ -47,7 +47,7 @@
  * Set if the composite extension is supported by the remote display.
  */
 
-int nxagentCompositeEnable = UNDEFINED;
+Bool nxagentCompositeEnable = False;
 
 void nxagentCompositeExtensionInit(void)
 {
@@ -55,7 +55,7 @@ void nxagentCompositeExtensionInit(void)
    * Set the flag only if the initialization completes.
    */
 
-  nxagentCompositeEnable = 0;
+  nxagentCompositeEnable = False;
 
   if (nxagentOption(Composite))
   {
@@ -96,7 +96,7 @@ void nxagentCompositeExtensionInit(void)
       fprintf(stderr, "nxagentCompositeExtensionInit: Enabling the use of the composite extension.\n");
       #endif
 
-      nxagentCompositeEnable = 1;
+      nxagentCompositeEnable = True;
     }
     #ifdef TEST
     else
@@ -115,8 +115,7 @@ void nxagentCompositeExtensionInit(void)
 
 void nxagentRedirectDefaultWindows(void)
 {
-  if (nxagentOption(Rootless) ||
-          nxagentCompositeEnable == 0)
+  if (nxagentOption(Rootless) || !nxagentCompositeEnable)
   {
     #ifdef TEST
     fprintf(stderr, "nxagentRedirectDefaultWindows: Not redirecting default "
@@ -140,10 +139,10 @@ void nxagentRedirectDefaultWindows(void)
 
     /*
      * When trying to redirect only the top level window, and not the
-     * subwindows, we incur in a strange be- haviour. The top level is
-     * unmapped, mapped, unmap- ped and then reparented. This at first
+     * subwindows, we incur in a strange behaviour. The top level is
+     * unmapped, mapped, unmapped and then reparented. This at first
      * makes the agent think that the window manager is gone, then the
-     * agent window disappears. To make thinks even more weird, this
+     * agent window disappears. To make things even more weird, this
      * happens only at reconnection.
      */
  
@@ -154,8 +153,7 @@ void nxagentRedirectDefaultWindows(void)
 
 void nxagentRedirectWindow(WindowPtr pWin)
 {
-  if (!nxagentOption(Rootless) ||
-          nxagentCompositeEnable == 0)
+  if (!nxagentOption(Rootless) || !nxagentCompositeEnable)
   {
     #ifdef TEST
     fprintf(stderr, "nxagentRedirectWindow: Not redirecting window id [%ld] "
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Composite.h b/nx-X11/programs/Xserver/hw/nxagent/Composite.h
index abe2551bf..02f08f878 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Composite.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Composite.h
@@ -31,7 +31,7 @@
  * its use is enabled.
  */
 
-extern int nxagentCompositeEnable;
+extern Bool nxagentCompositeEnable;
 
 /*
  * Query the composite extension on the
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Display.c b/nx-X11/programs/Xserver/hw/nxagent/Display.c
index 89d49edf1..95b5aa3af 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Display.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Display.c
@@ -92,7 +92,9 @@ is" without express or implied warranty.
 #include "compext/Compext.h"
 
 #include NXAGENT_ICON_NAME
+#ifdef X2GO
 #include X2GOAGENT_ICON_NAME
+#endif
 
 /*
  * Set here the required log level.
@@ -1849,6 +1851,7 @@ Bool nxagentMakeIcon(Display *disp, Pixmap *nxIcon, Pixmap *nxMask)
 {
   char** agentIconData;
 
+#ifdef X2GO
   /*
    * selecting x2go icon when running as X2Go agent
    */
@@ -1857,6 +1860,7 @@ Bool nxagentMakeIcon(Display *disp, Pixmap *nxIcon, Pixmap *nxMask)
     agentIconData = x2goagentIconData;
   }
   else
+#endif
   {
     agentIconData = nxagentIconData;
   }
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Error.c b/nx-X11/programs/Xserver/hw/nxagent/Error.c
index 8c9a52d2e..93f4f4387 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Error.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Error.c
@@ -136,105 +136,105 @@ static int nxagentPrintError(dpy, event, fp)
     XGetErrorDatabaseText(dpy, mtype, "XError", "X Error", mesg, BUFSIZ);
     (void) fprintf(fp, "%s:  %s\n  ", mesg, buffer);
     XGetErrorDatabaseText(dpy, mtype, "MajorCode", "Request Major code %d",
-	mesg, BUFSIZ);
+        mesg, BUFSIZ);
     (void) fprintf(fp, mesg, event->request_code);
     if (event->request_code < 128) {
-	snprintf(number, sizeof(number), "%d", event->request_code);
-	XGetErrorDatabaseText(dpy, "XRequest", number, "", buffer, BUFSIZ);
+        snprintf(number, sizeof(number), "%d", event->request_code);
+        XGetErrorDatabaseText(dpy, "XRequest", number, "", buffer, BUFSIZ);
     } else {
 #ifndef NXAGENT_SERVER
-	for (ext = dpy->ext_procs;
-	     ext && (ext->codes.major_opcode != event->request_code);
-	     ext = ext->next)
-	  ;
-	if (ext) {
-	    strncpy(buffer, ext->name, BUFSIZ);
-	    buffer[BUFSIZ - 1] = '\0';
+        for (ext = dpy->ext_procs;
+             ext && (ext->codes.major_opcode != event->request_code);
+             ext = ext->next)
+          ;
+        if (ext) {
+            strncpy(buffer, ext->name, BUFSIZ);
+            buffer[BUFSIZ - 1] = '\0';
         } else
 #endif
-	    buffer[0] = '\0';
+            buffer[0] = '\0';
     }
     (void) fprintf(fp, " (%s)\n", buffer);
     if (event->request_code >= 128) {
-	XGetErrorDatabaseText(dpy, mtype, "MinorCode", "Request Minor code %d",
-			      mesg, BUFSIZ);
-	fputs("  ", fp);
-	(void) fprintf(fp, mesg, event->minor_code);
+        XGetErrorDatabaseText(dpy, mtype, "MinorCode", "Request Minor code %d",
+                              mesg, BUFSIZ);
+        fputs("  ", fp);
+        (void) fprintf(fp, mesg, event->minor_code);
 #ifndef NXAGENT_SERVER
-	if (ext) {
-	    snprintf(mesg, sizeof(mesg), "%s.%d", ext->name, event->minor_code);
-	    XGetErrorDatabaseText(dpy, "XRequest", mesg, "", buffer, BUFSIZ);
-	    (void) fprintf(fp, " (%s)", buffer);
-	}
+        if (ext) {
+            snprintf(mesg, sizeof(mesg), "%s.%d", ext->name, event->minor_code);
+            XGetErrorDatabaseText(dpy, "XRequest", mesg, "", buffer, BUFSIZ);
+            (void) fprintf(fp, " (%s)", buffer);
+        }
 #endif
-	fputs("\n", fp);
+        fputs("\n", fp);
     }
     if (event->error_code >= 128) {
-	/* kludge, try to find the extension that caused it */
-	buffer[0] = '\0';
+        /* kludge, try to find the extension that caused it */
+        buffer[0] = '\0';
 #ifndef NXAGENT_SERVER
-	for (ext = dpy->ext_procs; ext; ext = ext->next) {
-	    if (ext->error_string)
-		(*ext->error_string)(dpy, event->error_code, &ext->codes,
-				     buffer, BUFSIZ);
-	    if (buffer[0]) {
-		bext = ext;
-		break;
-	    }
-	    if (ext->codes.first_error &&
-		ext->codes.first_error < (int)event->error_code &&
-		(!bext || ext->codes.first_error > bext->codes.first_error))
-		bext = ext;
-	}
-	if (bext)
-	    snprintf(buffer, sizeof(buffer), "%s.%d", bext->name,
-		    event->error_code - bext->codes.first_error);
-	else
+        for (ext = dpy->ext_procs; ext; ext = ext->next) {
+            if (ext->error_string)
+                (*ext->error_string)(dpy, event->error_code, &ext->codes,
+                                     buffer, BUFSIZ);
+            if (buffer[0]) {
+                bext = ext;
+                break;
+            }
+            if (ext->codes.first_error &&
+                ext->codes.first_error < (int)event->error_code &&
+                (!bext || ext->codes.first_error > bext->codes.first_error))
+                bext = ext;
+        }
+        if (bext)
+            snprintf(buffer, sizeof(buffer), "%s.%d", bext->name,
+                    event->error_code - bext->codes.first_error);
+        else
 #endif
-	    strcpy(buffer, "Value");
-	XGetErrorDatabaseText(dpy, mtype, buffer, "", mesg, BUFSIZ);
-	if (mesg[0]) {
-	    fputs("  ", fp);
-	    (void) fprintf(fp, mesg, event->resourceid);
-	    fputs("\n", fp);
-	}
-	/* let extensions try to print the values */
+            strcpy(buffer, "Value");
+        XGetErrorDatabaseText(dpy, mtype, buffer, "", mesg, BUFSIZ);
+        if (mesg[0]) {
+            fputs("  ", fp);
+            (void) fprintf(fp, mesg, event->resourceid);
+            fputs("\n", fp);
+        }
+        /* let extensions try to print the values */
 #ifndef NXAGENT_SERVER
-	for (ext = dpy->ext_procs; ext; ext = ext->next) {
-	    if (ext->error_values)
-		(*ext->error_values)(dpy, event, fp);
-	}
+        for (ext = dpy->ext_procs; ext; ext = ext->next) {
+            if (ext->error_values)
+                (*ext->error_values)(dpy, event, fp);
+        }
 #endif
     } else if ((event->error_code == BadWindow) ||
-	       (event->error_code == BadPixmap) ||
-	       (event->error_code == BadCursor) ||
-	       (event->error_code == BadFont) ||
-	       (event->error_code == BadDrawable) ||
-	       (event->error_code == BadColor) ||
-	       (event->error_code == BadGC) ||
-	       (event->error_code == BadIDChoice) ||
-	       (event->error_code == BadValue) ||
-	       (event->error_code == BadAtom)) {
-	if (event->error_code == BadValue)
-	    XGetErrorDatabaseText(dpy, mtype, "Value", "Value 0x%x",
-				  mesg, BUFSIZ);
-	else if (event->error_code == BadAtom)
-	    XGetErrorDatabaseText(dpy, mtype, "AtomID", "AtomID 0x%x",
-				  mesg, BUFSIZ);
-	else
-	    XGetErrorDatabaseText(dpy, mtype, "ResourceID", "ResourceID 0x%x",
-				  mesg, BUFSIZ);
-	fputs("  ", fp);
-	(void) fprintf(fp, mesg, event->resourceid);
-	fputs("\n", fp);
+               (event->error_code == BadPixmap) ||
+               (event->error_code == BadCursor) ||
+               (event->error_code == BadFont) ||
+               (event->error_code == BadDrawable) ||
+               (event->error_code == BadColor) ||
+               (event->error_code == BadGC) ||
+               (event->error_code == BadIDChoice) ||
+               (event->error_code == BadValue) ||
+               (event->error_code == BadAtom)) {
+        if (event->error_code == BadValue)
+            XGetErrorDatabaseText(dpy, mtype, "Value", "Value 0x%x",
+                                  mesg, BUFSIZ);
+        else if (event->error_code == BadAtom)
+            XGetErrorDatabaseText(dpy, mtype, "AtomID", "AtomID 0x%x",
+                                  mesg, BUFSIZ);
+        else
+            XGetErrorDatabaseText(dpy, mtype, "ResourceID", "ResourceID 0x%x",
+                                  mesg, BUFSIZ);
+        fputs("  ", fp);
+        (void) fprintf(fp, mesg, event->resourceid);
+        fputs("\n", fp);
     }
     XGetErrorDatabaseText(dpy, mtype, "ErrorSerial", "Error Serial #%d",
-			  mesg, BUFSIZ);
+                          mesg, BUFSIZ);
     fputs("  ", fp);
     (void) fprintf(fp, mesg, event->serial);
 #ifndef NXAGENT_SERVER
     XGetErrorDatabaseText(dpy, mtype, "CurrentSerial", "Current Serial #%d",
-			  mesg, BUFSIZ);
+                          mesg, BUFSIZ);
     fputs("\n  ", fp);
     (void) fprintf(fp, mesg, (unsigned long long)(X_DPY_GET_REQUEST(dpy)));
 #endif
diff --git a/nx-X11/programs/Xserver/hw/nxagent/GCOps.c b/nx-X11/programs/Xserver/hw/nxagent/GCOps.c
index 57b7c2b57..bac9947f0 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/GCOps.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/GCOps.c
@@ -700,7 +700,7 @@ RegionPtr nxagentCopyArea(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable,
 
   if (!nxagentOption(IgnoreVisibility) && pDstDrawable -> type == DRAWABLE_WINDOW &&
           (!nxagentWindowIsVisible((WindowPtr) pDstDrawable) ||
-              (!nxagentDefaultWindowIsVisible() && nxagentCompositeEnable == 0)))
+              (!nxagentDefaultWindowIsVisible() && !nxagentCompositeEnable)))
   {
     #ifdef TEST
     fprintf(stderr, "nxagentCopyArea: Prevented operation on fully obscured window at [%p].\n",
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Icons.h b/nx-X11/programs/Xserver/hw/nxagent/Icons.h
index a8a155cec..30457402b 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Icons.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Icons.h
@@ -32,6 +32,8 @@
 
 #define NXAGENT_ICON_NAME  "nxagent.xpm"
 
+#ifdef X2GO
 #define X2GOAGENT_ICON_NAME  "x2goagent.xpm"
+#endif
 
 #endif /* __Icons_H__ */
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Image.c b/nx-X11/programs/Xserver/hw/nxagent/Image.c
index 8c828df20..c033bf70d 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Image.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Image.c
@@ -87,8 +87,8 @@ int nxagentSplitThreshold = -1;
  * Set if images can use the alpha channel.
  */
 
-int nxagentAlphaEnabled = 0;
-int nxagentAlphaCompat  = 0;
+Bool nxagentAlphaEnabled = False;
+Bool nxagentAlphaCompat = False;
 
 /*
  * Used to reformat image when connecting to displays having different
@@ -418,7 +418,7 @@ FIXME: Here the split trap is always set and so the caching of the
      * send the alpha data in compressed form.
      */
 
-    if (nxagentAlphaCompat == 0)
+    if (!nxagentAlphaCompat)
     {
       NXSetUnpackAlpha(nxagentDisplay, resource, PACK_NONE, size, data, size);
     }
@@ -526,7 +526,7 @@ void nxagentPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth,
 
   if (!nxagentOption(IgnoreVisibility) && pDrawable -> type == DRAWABLE_WINDOW &&
           (!nxagentWindowIsVisible((WindowPtr) pDrawable) ||
-              (!nxagentDefaultWindowIsVisible() && nxagentCompositeEnable == 0)))
+              (!nxagentDefaultWindowIsVisible() && !nxagentCompositeEnable)))
   {
 
     #ifdef TEST
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Image.h b/nx-X11/programs/Xserver/hw/nxagent/Image.h
index 6e22fa9f6..5876f5152 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Image.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Image.h
@@ -61,8 +61,8 @@ extern int nxagentSplitThreshold;
  * can be sent in compressed form.
  */
 
-extern int nxagentAlphaEnabled;
-extern int nxagentAlphaCompat;
+extern Bool nxagentAlphaEnabled;
+extern Bool nxagentAlphaCompat;
 
 /*
  * Reset the visual and alpha cache
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Imakefile b/nx-X11/programs/Xserver/hw/nxagent/Imakefile
index a713467ae..4e48f62f5 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Imakefile
+++ b/nx-X11/programs/Xserver/hw/nxagent/Imakefile
@@ -192,8 +192,6 @@ INCLUDES = \
 
 ### list of existing NXAGENT macros:
 #
-# NXAGENT_SHAPE                    Old shape code
-# NXAGENT_SHAPE2                   New shape code
 # NXAGENT_FIXKEYS                  Force the release of pressed key when losing focus
 # NXAGENT_CLIPBOARD                Enables clipboard cut and paste function between X servers.
 # NXAGENT_RANDR_MODE_PREFIX        Prefix for RandR display modes (i.e., nx_<x>x<y>) (default: nx_)
@@ -206,6 +204,7 @@ INCLUDES = \
 #                                  This only has an effect if NX_TRANS_WAKEUP is also set for os/WaitFor.c
 # NXAGENT_ARTSD                    enable special handling of MCOPGLOBALS property used by artsd.
 # NXAGENT_RENDER_CLEANUP           cleanup padding bits/bytes of glyphs to possibly increase compression rate
+# X2GO                             include code to support running as x2goagent
 #
 ### macros not investigated yet:
 #
@@ -245,7 +244,6 @@ DEFINES = \
         -UXF86VIDMODE -UXFreeXDGA -UXF86MISC -UXF86DRI \
         -DNXAGENT_SERVER \
         -DNXAGENT_RENDER_CLEANUP \
-        -DNXAGENT_SHAPE2 \
         -DNXAGENT_FIXKEYS \
         -DNXAGENT_CLIPBOARD \
         -DNXAGENT_WAKEUP=1000 \
@@ -259,6 +257,7 @@ DEFINES = \
         -DRANDR_15_INTERFACE=1 \
         -DPANORAMIX \
         -UDEBUG_TREE \
+        -DX2GO \
         -DSYSTEMFONTDIR=\"$(SYSTEMFONTDIR)\" \
         $(NULL)
 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Init.c b/nx-X11/programs/Xserver/hw/nxagent/Init.c
index e8e230956..8a9964154 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Init.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Init.c
@@ -156,7 +156,7 @@ FIXME: These, if not removed, should at least be moved to Display.h
        and Display.c.
 */
 int nxagentBackingStore;
-int nxagentSaveUnder;
+Bool nxagentSaveUnder;
 
 /*
  * This is true at startup and set to the value of
@@ -173,7 +173,8 @@ int nxagentSaveUnder;
  */
 Bool nxagentDoFullGeneration = True;
 
- /*
+#ifdef X2GO
+/*
  * True if agent is running as X2goAgent
  * False if agent is running as NXAgent
  */
@@ -196,6 +197,7 @@ void checkX2goAgent(void)
   else
     nxagentX2go = False;
 }
+#endif
 
 /*
  * Called at X server's initialization.
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Init.h b/nx-X11/programs/Xserver/hw/nxagent/Init.h
index 6fa1bedd7..ec0bb3483 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Init.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Init.h
@@ -40,13 +40,15 @@ is" without express or implied warranty.
 #ifndef __Init_H__
 #define __Init_H__
 
-extern int nxagentDoFullGeneration;
+extern Bool nxagentDoFullGeneration;
 
 extern int nxagentBackingStore;
-extern int nxagentSaveUnder;
+extern Bool nxagentSaveUnder;
 
-extern int nxagentX2go;
+#ifdef X2GO
+extern Bool nxagentX2go;
 void checkX2goAgent(void);
+#endif
 
 extern ServerGrabInfoRec nxagentGrabServerInfo;
 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Keyboard.c b/nx-X11/programs/Xserver/hw/nxagent/Keyboard.c
index 731844874..2142adc8e 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Keyboard.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Keyboard.c
@@ -663,7 +663,8 @@ XkbError:
             #endif
             nxagentChangeOption(KeycodeConversion, KeycodeConversionOff);
 
-	    /*
+#ifdef X2GO
+            /*
              * when cloning we do not want X2Go to set the keyboard
              * via a keyboard file generated by nxagent. The defined
              * method for switching that off is the creation of a dir
@@ -692,6 +693,7 @@ XkbError:
             {
               nxagentWriteKeyboardFile(nxagentRemoteRules, nxagentRemoteModel, nxagentRemoteLayout, nxagentRemoteVariant, nxagentRemoteOptions);
             }
+#endif
           }
           nxagentKeycodeConversionSetup();
         }
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Keystroke.c b/nx-X11/programs/Xserver/hw/nxagent/Keystroke.c
index aff2e56ab..5196e28b7 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Keystroke.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Keystroke.c
@@ -35,7 +35,7 @@
 #include "Options.h"
 #include "Keyboard.h"
 #include "Drawable.h"
-#include "Init.h" /* extern int nxagentX2go */
+#include "Init.h" /* extern Bool nxagentX2go */
 #include "Utils.h"
 
 #include <unistd.h>
@@ -314,11 +314,15 @@ void nxagentInitKeystrokes(Bool force)
 
   done = True;
 
+#ifdef X2GO
   if (nxagentX2go) {
     homefile = "/.x2go/config/keystrokes.cfg";
     etcfile = "/etc/x2go/keystrokes.cfg";
     envvar = "X2GO_KEYSTROKEFILE";
-  } else {
+  }
+  else
+#endif
+  {
     homefile = "/.nx/config/keystrokes.cfg";
     etcfile = "/etc/nxagent/keystrokes.cfg";
     envvar = "NXAGENT_KEYSTROKEFILE";
diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXrender.c b/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
index 5851eb05c..eed64f808 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
@@ -123,7 +123,7 @@ extern void nxagentRenderCreateConicalGradient(PicturePtr pPicture,
                                                xRenderColor *colors);
 
 #ifdef NXAGENT_SERVER
-extern int nxagentAlphaEnabled;
+extern Bool nxagentAlphaEnabled;
 #endif
 
 /*
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Options.c b/nx-X11/programs/Xserver/hw/nxagent/Options.c
index afc6899e3..be6e5d5e1 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Options.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Options.c
@@ -129,7 +129,7 @@ void nxagentInitOptions(void)
   nxagentOptions.DisplayBuffer  = UNDEFINED;
   nxagentOptions.DisplayCoalescence = 0;
 
-  nxagentOptions.Composite = True;
+  nxagentOptions.Composite = False;
 
   nxagentOptions.IgnoreVisibility = False;
 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Pixels.h b/nx-X11/programs/Xserver/hw/nxagent/Pixels.h
index cf5e50c04..f2b43b0fc 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Pixels.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Pixels.h
@@ -174,7 +174,7 @@ FIXME: Changed macro: NXAGENT_SHOULD_DEFER_COMPOSITE
 
 #define NXAGENT_SHOULD_SYNCHRONIZE_WINDOW(pDrawable)  \
     (nxagentWindowIsVisible((WindowPtr) pDrawable) && \
-        (nxagentDefaultWindowIsVisible() || nxagentCompositeEnable == 1))
+        (nxagentDefaultWindowIsVisible() || nxagentCompositeEnable))
 
 #define MINIMUM_PIXMAP_USAGE_COUNTER 2
 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Reconnect.c b/nx-X11/programs/Xserver/hw/nxagent/Reconnect.c
index e6d3ce6ec..58c1fc4e2 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Reconnect.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Reconnect.c
@@ -503,12 +503,14 @@ Bool nxagentReconnectSession(void)
 
   nxagentMapDefaultWindows();
 
+#ifdef NXAGENT_ONSTART
   /*
    * Ensure that the SetSelectionOwner request is sent through the
    * link.
    */
 
   XFlush(nxagentDisplay);
+#endif
 
   NXTransContinue(NULL);
 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Render.c b/nx-X11/programs/Xserver/hw/nxagent/Render.c
index 98d7aef67..205940ed7 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Render.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Render.c
@@ -703,7 +703,7 @@ int nxagentCreatePicture(PicturePtr pPicture, Mask mask)
 
   nxagentPicturePriv(pPicture) -> picture = id;
 
-  if (nxagentAlphaEnabled == 1 && pPicture -> pDrawable->depth == 32 &&
+  if (nxagentAlphaEnabled && pPicture -> pDrawable -> depth == 32 &&
           pPicture -> pFormat -> direct.alpha != 0)
   {
     if (pPicture -> pDrawable -> type == DRAWABLE_PIXMAP)
@@ -2431,7 +2431,7 @@ void nxagentReconnectPicture(void * p0, XID x1, void *p2)
               (void *) pPicture, nxagentPicture(pPicture));
   #endif
 
-  if (nxagentAlphaEnabled == 1 && pPicture -> pDrawable -> depth == 32 &&
+  if (nxagentAlphaEnabled && pPicture -> pDrawable -> depth == 32 &&
           pPicture -> pFormat -> direct.alpha != 0)
   {
     if (pPicture -> pDrawable -> type == DRAWABLE_PIXMAP)
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c
index b87c1e225..31b8b68a3 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c
@@ -1616,7 +1616,7 @@ N/A
     pScreen->ClearBackingStore = (RegionPtr (*)()) 0;
     pScreen->DrawGuarantee = (void (*)()) 0;
 
-    if (enableBackingStore == 1)
+    if (enableBackingStore)
     {
       #ifdef TEST
       fprintf(stderr, "nxagentOpenScreen: Going to initialize backing store.\n");
@@ -1814,11 +1814,13 @@ N/A
         #endif
       }
 
+#ifdef X2GO
       /*
        * Setting WM_CLASS to "X2GoAgent" when running in X2Go Agent mode
        * we need it to properly display all window parameters by some WMs
        * (for example on Maemo)
        */
+#endif
       {
         #ifdef TEST
         fprintf(stderr, "nxagentOpenScreen: Setting WM_CLASS and WM_NAME for window with id [%ld].\n",
@@ -1827,12 +1829,14 @@ N/A
 
         XClassHint hint;
 
-        if(nxagentX2go)
+#ifdef X2GO
+        if (nxagentX2go)
         {
           hint.res_name = strdup("X2GoAgent");
           hint.res_class = strdup("X2GoAgent");
         }
         else
+#endif
         {
           hint.res_name = strdup("NXAgent");
           hint.res_class = strdup("NXAgent");
@@ -1850,6 +1854,7 @@ N/A
 
     if (nxagentOption(Fullscreen))
     {
+#ifdef NXAGENT_ONSTART
       /*
        * FIXME: Do we still need to set this property?
        */
@@ -1865,6 +1870,7 @@ N/A
                         (unsigned char*) "X-AGENT",
                         strlen("X-AGENT"));
       }
+#endif
 
       XSelectInput(nxagentDisplay, nxagentFullscreenWindow, nxagentGetDefaultEventMask());
     }
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Splash.c b/nx-X11/programs/Xserver/hw/nxagent/Splash.c
index 37f965f04..d28a96df1 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Splash.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Splash.c
@@ -48,6 +48,12 @@
 #undef  TEST
 #undef  DEBUG
 
+#ifndef X2GO
+void nxagentShowSplashWindow(XlibWindow parentWindow) {}
+void nxagentPaintLogo(XlibWindow win, int scale, int width, int height) {}
+void nxagentRemoveSplashWindow(void) {}
+Bool nxagentHaveSplashWindow(void) {return False;}
+#else
 /*
  * Colors used to paint the splash screen.
  */
@@ -68,7 +74,7 @@ void nxagentShowSplashWindow(XlibWindow parentWindow)
   /*
    * Show splash window only when running as X2Go Agent
    */
-  if(!nxagentX2go)
+  if (!nxagentX2go)
     return;
 
   #ifdef TEST
@@ -344,6 +350,7 @@ void nxagentRemoveSplashWindow(void)
     nxagentSplashWindow = None;
     nxagentRefreshWindows(screenInfo.screens[0]->root);
 
+#ifdef NXAGENT_ONSTART
     #ifdef TEST
     fprintf(stderr, "%s: setting the ownership of %s (%d) on window [0x%lx]\n", __func__,
                 "NX_CUT_BUFFER_SERVER", (int)serverTransToAgentProperty, nxagentWindow(screenInfo.screens[0]->root));
@@ -351,6 +358,7 @@ void nxagentRemoveSplashWindow(void)
 
     XSetSelectionOwner(nxagentDisplay, serverTransToAgentProperty,
                            nxagentWindow(screenInfo.screens[0]->root), CurrentTime);
+#endif
   }
 
   if (nxagentPixmapLogo)
@@ -359,3 +367,4 @@ void nxagentRemoveSplashWindow(void)
     nxagentPixmapLogo = (XlibPixmap) 0;
   }
 }
+#endif /* ifdef X2GO */
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Trap.h b/nx-X11/programs/Xserver/hw/nxagent/Trap.h
index 4203d2b13..1c10f00ea 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Trap.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Trap.h
@@ -26,6 +26,8 @@
 #ifndef __Traps_H__
 #define __Traps_H__
 
+#include <nx-X11/Xdefs.h>
+
 #ifndef False
 #define False 0
 #endif
@@ -38,72 +40,72 @@
  * Set if we are dispatching a render extension request. Used to avoid
  * reentrancy in GC operations.
  */
-extern int nxagentGCTrap;
+extern Bool nxagentGCTrap;
 
 /*
  * Set if we are enqueing an internal operation, CreateWindow and
  * Reparent- Window. Used to remove any screen operation.
  */
-extern int nxagentScreenTrap;
+extern Bool nxagentScreenTrap;
 
 /*
  * Set if we are executing a GC operation only on the X side. Used to
  * avoid reentrancy in FB layer.
  */
-extern int nxagentFBTrap;
+extern Bool nxagentFBTrap;
 
 /*
  * Set if we are dispatching a shared memory extension request.
  */
-extern int nxagentShmTrap;
+extern Bool nxagentShmTrap;
 
 /*
  * Set if a shared pixmap operation is requested by the client.
  */
-extern int nxagentShmPixmapTrap;
+extern Bool nxagentShmPixmapTrap;
 
 /*
  * Set if we are dispatching a XVideo extension request.
  */
-extern int nxagentXvTrap;
+extern Bool nxagentXvTrap;
 
 /*
  * Set if we are dispatching a GLX extension request.
  */
-extern int nxagentGlxTrap;
+extern Bool nxagentGlxTrap;
 
 /*
  * Set while we are resuming the session.
  */
-extern int nxagentReconnectTrap;
+extern Bool nxagentReconnectTrap;
 
 /*
  * Set if we need to realize a drawable by using a lossless encoding.
  */
-extern int nxagentLosslessTrap;
+extern Bool nxagentLosslessTrap;
 
 /*
  * Set to force the synchronization of a drawable.
  */
-extern int nxagentSplitTrap;
+extern Bool nxagentSplitTrap;
 
 /*
  * Set to avoid CapsLock synchronization problems when CapsLock is the
  * first key to be pressed in the session.
  */
-extern int nxagentXkbCapsTrap;
+extern Bool nxagentXkbCapsTrap;
 
 /*
  * Set to avoid NumLock synchronization problems when NumLock is the
  * first key to be pressed in the session.
  */
-extern int nxagentXkbNumTrap;
+extern Bool nxagentXkbNumTrap;
 
 /*
  * Set to indicate we are processing a clipboard event triggered by
  * the real X server. This is used to avoid endless loops if callbacks
  * would trigger another event by the real X server
  */
-extern int nxagentExternalClipboardEventTrap;
+extern Bool nxagentExternalClipboardEventTrap;
 
 #endif /* __Trap_H__ */
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Window.c b/nx-X11/programs/Xserver/hw/nxagent/Window.c
index 5f12fd48a..6f98ee57b 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Window.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Window.c
@@ -471,13 +471,8 @@ Bool nxagentCreateWindow(WindowPtr pWin)
   }
 
   #ifdef SHAPE
-    #ifdef NXAGENT_SHAPE2
-      nxagentWindowPriv(pWin)->boundingShape = NULL;
-      nxagentWindowPriv(pWin)->clipShape = NULL;
-    #else
-      nxagentWindowPriv(pWin)->boundingShape = RegionCreate(NULL, 1);
-      nxagentWindowPriv(pWin)->clipShape = RegionCreate(NULL, 1);
-    #endif
+  nxagentWindowPriv(pWin)->boundingShape = NULL;
+  nxagentWindowPriv(pWin)->clipShape = NULL;
   #endif /* SHAPE */
 
   fbCreateWindow(pWin);
@@ -583,21 +578,16 @@ Bool nxagentDestroyWindow(WindowPtr pWin)
            pWindowPriv->siblingAbove;
   }
 
-  #ifdef NXAGENT_SHAPE2
-    #ifdef SHAPE
-    if (pWindowPriv->boundingShape)
-    {
-      RegionDestroy(pWindowPriv->boundingShape);
-    }
-
-    if (pWindowPriv->clipShape)
-    {
-      RegionDestroy(pWindowPriv->clipShape);
-    }
-    #endif
-  #else
+  #ifdef SHAPE
+  if (pWindowPriv->boundingShape)
+  {
     RegionDestroy(pWindowPriv->boundingShape);
+  }
+
+  if (pWindowPriv->clipShape)
+  {
     RegionDestroy(pWindowPriv->clipShape);
+  }
   #endif
 
   if (pWindowPriv -> corruptedRegion)
@@ -2079,13 +2069,11 @@ void nxagentClipNotify(WindowPtr pWin, int dx, int dy)
   nxagentAddConfiguredWindow(pWin, CWStackMode);
   nxagentAddConfiguredWindow(pWin, CW_Shape);
 
-  #ifndef NXAGENT_SHAPE
-    #ifdef SHAPE
-    /*
-     * nxagentShapeWindow(pWin);
-     */
-    #endif /* SHAPE */
-  #endif /* NXAGENT_SHAPE */
+  #ifdef SHAPE
+  /*
+   * nxagentShapeWindow(pWin);
+   */
+  #endif /* SHAPE */
 }
 
 /*
@@ -2354,12 +2342,10 @@ void nxagentShapeWindow(WindowPtr pWin)
                   RegionNumRects(wBoundingShape(pWin)));
       #endif
 
-      #ifdef NXAGENT_SHAPE2
       if (!nxagentWindowPriv(pWin)->boundingShape)
       {
         nxagentWindowPriv(pWin)->boundingShape = RegionCreate(NULL, 1);
       }
-      #endif
 
       RegionCopy(nxagentWindowPriv(pWin)->boundingShape, wBoundingShape(pWin));
 
@@ -2378,10 +2364,8 @@ void nxagentShapeWindow(WindowPtr pWin)
         XUnionRectWithRegion(&rect, reg, reg);
       }
 
-      #ifndef NXAGENT_SHAPE
       XShapeCombineRegion(nxagentDisplay, nxagentWindow(pWin),
                               ShapeBounding, 0, 0, reg, ShapeSet);
-      #endif
 
       XDestroyRegion(reg);
     }
@@ -2393,10 +2377,8 @@ void nxagentShapeWindow(WindowPtr pWin)
 
       RegionEmpty(nxagentWindowPriv(pWin)->boundingShape);
 
-      #ifndef NXAGENT_SHAPE
       XShapeCombineMask(nxagentDisplay, nxagentWindow(pWin),
                             ShapeBounding, 0, 0, None, ShapeSet);
-      #endif
     }
   }
 
@@ -2413,12 +2395,10 @@ void nxagentShapeWindow(WindowPtr pWin)
                   RegionNumRects(wClipShape(pWin)));
       #endif
 
-      #ifdef NXAGENT_SHAPE2
       if (!nxagentWindowPriv(pWin)->clipShape)
       {
         nxagentWindowPriv(pWin)->clipShape = RegionCreate(NULL, 1);
       }
-      #endif
 
       RegionCopy(nxagentWindowPriv(pWin)->clipShape, wClipShape(pWin));
 
@@ -2437,10 +2417,8 @@ void nxagentShapeWindow(WindowPtr pWin)
         XUnionRectWithRegion(&rect, reg, reg);
       }
 
-      #ifndef NXAGENT_SHAPE
       XShapeCombineRegion(nxagentDisplay, nxagentWindow(pWin),
                               ShapeClip, 0, 0, reg, ShapeSet);
-      #endif
 
       XDestroyRegion(reg);
     }
@@ -2452,10 +2430,8 @@ void nxagentShapeWindow(WindowPtr pWin)
 
       RegionEmpty(nxagentWindowPriv(pWin)->clipShape);
 
-      #ifndef NXAGENT_SHAPE
       XShapeCombineMask(nxagentDisplay, nxagentWindow(pWin),
                             ShapeClip, 0, 0, None, ShapeSet);
-      #endif
     }
   }
 }
@@ -2575,12 +2551,14 @@ void nxagentMapDefaultWindows(void)
       }
     }
 
+#ifdef NXAGENT_ONSTART
     /*
      * Send a SetSelectionOwner request to notify of the agent start.
      */
 
     XSetSelectionOwner(nxagentDisplay, serverTransToAgentProperty,
                            nxagentDefaultWindows[i], CurrentTime);
+#endif
   }
 
   /*
diff --git a/nx-X11/programs/Xserver/hw/nxagent/compext/Compext.c b/nx-X11/programs/Xserver/hw/nxagent/compext/Compext.c
index 7a6cb9e30..dcb91348b 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/compext/Compext.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/compext/Compext.c
@@ -74,7 +74,23 @@
 #define PANIC
 #define WARNING
 #undef  TEST
+#undef  TEST_DISPLAY
+#undef  TEST_IMAGE
+#undef  TEST_INPUT
+#undef  TEST_PARAMS
+#undef  TEST_POINTER
+#undef  TEST_PROPERTY
+#undef  TEST_SPLIT
+#undef  TEST_UNPACK
 #undef  DEBUG
+#undef  DEBUG_DISPLAY
+#undef  DEBUG_IMAGE
+#undef  DEBUG_INPUT
+#undef  DEBUG_PARAMS
+#undef  DEBUG_POINTER
+#undef  DEBUG_PROPERTY
+#undef  DEBUG_SPLIT
+#undef  DEBUG_UNPACK
 #undef  DUMP
 
 /*
@@ -271,7 +287,7 @@ extern int _NXInternalResetEncoders(Display *dpy);
 
 int NXInitDisplay(Display *dpy)
 {
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXInitDisplay: Called for display at [%p].\n", (void *) dpy);
   #endif
 
@@ -286,7 +302,7 @@ int NXInitDisplay(Display *dpy)
     return 1;
   }
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXInitDisplay: WARNING! Internal structures already initialized.\n");
   #endif
 
@@ -295,7 +311,7 @@ int NXInitDisplay(Display *dpy)
 
 int NXResetDisplay(Display *dpy)
 {
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXResetDisplay: Called for display at [%p].\n", (void *) dpy);
   #endif
 
@@ -310,7 +326,7 @@ int NXResetDisplay(Display *dpy)
     return 1;
   }
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXResetDisplay: WARNING! Internal structures already reset.\n");
   #endif
 
@@ -324,20 +340,18 @@ int _NXInternalInitResources(Display *dpy)
 
 int _NXInternalResetResources(Display *dpy)
 {
-  int i;
-
-  #ifdef TEST
+  #if defined(TEST_IMAGE) || defined(TEST_PROPERTY) || defined(TEST_POINTER) || defined(TEST_INPUT)
   fprintf(stderr, "******_NXInternalResetResources: Clearing all the internal structures.\n");
   #endif
 
-  for (i = 0; i < NXNumberOfResources; i++)
+  for (int i = 0; i < NXNumberOfResources; i++)
   {
     _NXSplitResources[i]  = 0;
     _NXUnpackResources[i] = 0;
 
     if (_NXCollectedImages[i] != NULL)
     {
-      #ifdef TEST
+      #ifdef TEST_IMAGE
       fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect image data "
                   "for resource [%d].\n", i);
       #endif
@@ -359,7 +373,7 @@ int _NXInternalResetResources(Display *dpy)
 
     if (_NXCollectedProperties[i] != NULL)
     {
-      #ifdef TEST
+      #ifdef TEST_PROPERTY
       fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect property data "
                   "for resource [%d].\n", i);
       #endif
@@ -378,7 +392,7 @@ int _NXInternalResetResources(Display *dpy)
 
     if (_NXCollectedGrabPointers[i] != NULL)
     {
-      #ifdef TEST
+      #ifdef TEST_POINTER
       fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing grab pointer data "
                   "for resource [%d].\n", i);
       #endif
@@ -395,7 +409,7 @@ int _NXInternalResetResources(Display *dpy)
 
     if (_NXCollectedInputFocuses[i] != NULL)
     {
-      #ifdef TEST
+      #ifdef TEST_INPUT
       fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect input focus data "
                   "for resource [%d].\n", i);
       #endif
@@ -440,6 +454,11 @@ int NXSetDisplayPolicy(Display *dpy, int policy)
   }
 }
 
+/*
+ * return codes:
+ * -1  something went wrong
+ * 1   success
+ */
 int NXSetDisplayBuffer(Display *dpy, int size)
 {
   /*
@@ -454,7 +473,7 @@ int NXSetDisplayBuffer(Display *dpy, int size)
 
   if (dpy -> bufmax - size == dpy -> buffer)
   {
-    #ifdef TEST
+    #ifdef TEST_DISPLAY
     fprintf(stderr, "******NXSetDisplayBuffer: Nothing to do with buffer size matching.\n");
     #endif
 
@@ -484,7 +503,7 @@ int NXSetDisplayBuffer(Display *dpy, int size)
   dpy -> bufptr = dpy -> buffer;
   dpy -> bufmax = dpy -> bufptr + size;
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayBuffer: Set the display output buffer size to [%d].\n",
               size);
   #endif
@@ -527,7 +546,7 @@ int NXHandleDisplayError(int value)
 
   _NXHandleDisplayError = value;
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXHandleDisplayError: Set the flag to [%d] with previous value [%d].\n",
               value, previous);
   #endif
@@ -596,7 +615,7 @@ int NXDisplayReadable(Display *dpy)
 
   if (result == 0)
   {
-    #ifdef DEBUG
+    #ifdef DEBUG_DISPLAY
     fprintf(stderr, "******NXDisplayReadable: Returning [%d] bytes readable from fd [%d].\n",
                 readable, dpy -> fd);
     #endif
@@ -604,7 +623,7 @@ int NXDisplayReadable(Display *dpy)
     return readable;
   }
 
-  #ifdef DEBUG
+  #ifdef DEBUG_DISPLAY
   fprintf(stderr, "******NXDisplayReadable: WARNING! Error detected on display fd [%d].\n",
               dpy -> fd);
   #endif
@@ -614,7 +633,7 @@ int NXDisplayReadable(Display *dpy)
 
 int NXDisplayFlushable(Display *dpy)
 {
-  #ifdef DEBUG
+  #ifdef DEBUG_DISPLAY
 
   int flushable;
 
@@ -637,7 +656,7 @@ int NXDisplayFlushable(Display *dpy)
 
 int NXDisplayCongestion(Display *dpy)
 {
-  #ifdef DEBUG
+  #ifdef DEBUG_DISPLAY
 
   int congestion = NXTransCongestion(dpy -> fd);
 
@@ -658,7 +677,7 @@ int NXFlushDisplay(Display *dpy, int what)
   if (!(dpy -> flags & XlibDisplayWriting) &&
           dpy -> bufptr - dpy -> buffer > 0)
   {
-    #ifdef DEBUG
+    #ifdef DEBUG_DISPLAY
     fprintf(stderr, "******NXFlushDisplay: Writing with [%d] bytes in the buffer.\n",
             (int) (dpy -> bufptr - dpy -> buffer));
     #endif
@@ -671,7 +690,7 @@ int NXFlushDisplay(Display *dpy, int what)
     return 0;
   }
 
-  #ifdef DEBUG
+  #ifdef DEBUG_DISPLAY
   fprintf(stderr, "******NXFlushDisplay: Flushing with [%d] bytes in the NX transport.\n",
               NXDisplayFlushable(dpy));
   #endif
@@ -685,7 +704,7 @@ NXDisplayErrorPredicate NXSetDisplayErrorPredicate(NXDisplayErrorPredicate predi
 
   _NXDisplayErrorFunction = predicate;
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayErrorPredicate: Set the predicate to [%p] with previous value [%p].\n",
               predicate, previous);
   #endif
@@ -699,7 +718,7 @@ NXDisplayBlockHandler NXSetDisplayBlockHandler(NXDisplayBlockHandler handler)
 
   _NXDisplayBlockFunction = handler;
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayBlockHandler: Set the handler to [%p] with previous value [%p].\n",
               handler, previous);
   #endif
@@ -713,7 +732,7 @@ NXDisplayWriteHandler NXSetDisplayWriteHandler(NXDisplayWriteHandler handler)
 
   _NXDisplayWriteFunction = handler;
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayWriteHandler: Set the handler to [%p] with previous value [%p].\n",
               handler, previous);
   #endif
@@ -730,7 +749,7 @@ NXDisplayFlushHandler NXSetDisplayFlushHandler(NXDisplayFlushHandler handler, Di
   NXTransHandler(NX_FD_ANY, NX_HANDLER_FLUSH,
                      (void (*)(void *, int)) handler, (void *) display);
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayFlushHandler: Set the handler to [%p] with display [%p] "
               "and previous value [%p].\n", handler, display, previous);
   #endif
@@ -751,7 +770,7 @@ NXDisplayStatisticsHandler NXSetDisplayStatisticsHandler(NXDisplayStatisticsHand
   NXTransHandler(NX_FD_ANY, NX_HANDLER_STATISTICS,
                      (void (*)(void *, int)) handler, (void *) buffer);
 
-  #ifdef TEST
+  #ifdef TEST_DISPLAY
   fprintf(stderr, "******NXSetDisplayStatisticsHandler: Set the handler to [%p] with buffer pointer [%p] "
               "and previous value [%p].\n", handler, buffer, previous);
   #endif
@@ -803,6 +822,11 @@ void _NXInternalLostSequenceFunction(Display *dpy, unsigned long newseq,
   #endif
 }
 
+/*
+ * return codes:
+ * 0  error receiving reply
+ * 1  success
+ */
 Status NXGetControlParameters(Display *dpy, unsigned int *link_type, unsigned int *local_major,
                                   unsigned int *local_minor, unsigned int *local_patch,
                                       unsigned int *remote_major, unsigned int *remote_minor,
@@ -820,14 +844,14 @@ Status NXGetControlParameters(Display *dpy, unsigned int *link_type, unsigned in
 
   GetEmptyReq(NXGetControlParameters, req);
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetControlParameters: Sending message opcode [%d].\n",
               X_NXGetControlParameters);
   #endif
 
   if (_XReply(dpy, (xReply *) &rep, 0, xTrue) == xFalse)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetControlParameters: Error receiving reply.\n");
     #endif
 
@@ -838,7 +862,7 @@ Status NXGetControlParameters(Display *dpy, unsigned int *link_type, unsigned in
     return 0;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetControlParameters: Got reply with link type [%u].\n", rep.linkType);
 
   fprintf(stderr, "******NXGetControlParameters: Local protocol major [%u] minor [%u] patch [%u].\n",
@@ -905,6 +929,11 @@ Status NXGetControlParameters(Display *dpy, unsigned int *link_type, unsigned in
  * remote proxy?
  */
 
+/*
+ * return codes:
+ * 0  something went wrong
+ * 1  success
+ */
 Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char supported_methods[])
 {
   register xNXGetUnpackParametersReq *req;
@@ -913,13 +942,9 @@ Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char
 
   register unsigned n;
 
-  #ifdef TEST
-  register unsigned i;
-  #endif
-
   if (*entries < NXNumberOfPackMethods)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetUnpackParameters: Requested only [%d] entries while they should be [%d].\n",
                 *entries, NXNumberOfPackMethods);
     #endif
@@ -933,14 +958,14 @@ Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char
 
   req -> entries = *entries;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetUnpackParameters: Sending message opcode [%d] with [%d] requested entries.\n",
               X_NXGetUnpackParameters, *entries);
   #endif
 
   if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == xFalse || rep.length == 0)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetUnpackParameters: Error receiving reply.\n");
     #endif
 
@@ -953,7 +978,7 @@ Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char
 
   if ((n = rep.length << 2) > *entries)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetUnpackParameters: Got [%d] bytes of reply data while they should be [%d].\n",
                 n, *entries);
     #endif
@@ -969,17 +994,17 @@ Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char
 
   *entries = n;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetUnpackParameters: Reading [%d] bytes of reply data.\n", n);
   #endif
 
   _XReadPad(dpy, (char *) supported_methods, n);
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
 
   fprintf(stderr, "******NXGetUnpackParameters: Got reply with methods: ");
 
-  for (i = 0; i < n; i++)
+  for (unsigned int i = 0; i < n; i++)
   {
     if (supported_methods[i] != 0)
     {
@@ -1011,6 +1036,11 @@ Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char
  * reserve the XID that will be used by the remote.
  */
 
+/*
+ * return codes:
+ * 0  something went wrong
+ * 1  success
+ */
 Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
                                 unsigned int *enable_server, unsigned int *client_segment,
                                     unsigned int *server_segment, unsigned int *client_size,
@@ -1057,12 +1087,12 @@ Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
     req -> clientSegment = *client_segment;
     req -> serverSegment = *server_segment;
 
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetShmemParameters: Sending message opcode [%d] at stage [%d].\n",
                 X_NXGetShmemParameters, stage);
     #endif
 
-    #ifdef TEST
+    #ifdef TEST_PARAMS
 
     if (stage == 0)
     {
@@ -1101,7 +1131,7 @@ Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
 
       if (_XReply(dpy, (xReply *) &rep, 0, xTrue) == xFalse)
       {
-        #ifdef TEST
+        #ifdef TEST_PARAMS
         fprintf(stderr, "******NXGetShmemParameters: Error receiving reply.\n");
         #endif
 
@@ -1126,7 +1156,7 @@ Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
   *client_size = rep.clientSize;
   *server_size = rep.serverSize;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetShmemParameters: Got final reply with enabled client [%u] and server [%u].\n",
               *enable_client, *enable_server);
 
@@ -1160,6 +1190,11 @@ Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
  * advertise only the fonts that can be opened at both sides.
  */
 
+/*
+ * return codes:
+ * 0  something went wrong
+ * 1  success
+ */
 Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_data[])
 {
   _X_UNUSED register xNXGetFontParametersReq *req;
@@ -1168,13 +1203,13 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
 
   register unsigned n;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   register unsigned i;
   #endif
 
   if (path_length < 1)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetFontParameters: No room to store the reply.\n");
     #endif
 
@@ -1187,14 +1222,14 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
 
   GetReq(NXGetFontParameters, req);
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetFontParameters: Sending message opcode [%d].\n",
               X_NXGetFontParameters);
   #endif
 
   if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == xFalse || rep.length == 0)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetFontParameters: Error receiving reply.\n");
     #endif
 
@@ -1207,7 +1242,7 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
 
   if ((n = rep.length << 2) > path_length)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetFontParameters: Got [%d] bytes of reply data with only room for [%d].\n",
                 n, path_length);
     #endif
@@ -1221,7 +1256,7 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
     return 0;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXGetFontParameters: Reading [%d] bytes of reply data.\n", n);
   #endif
 
@@ -1234,7 +1269,7 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
 
   if (*path_data > path_length - 1)
   {
-    #ifdef TEST
+    #ifdef TEST_PARAMS
     fprintf(stderr, "******NXGetFontParameters: Inconsistent length in the returned string.\n");
     #endif
 
@@ -1245,7 +1280,7 @@ Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_dat
     return 0;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
 
   fprintf(stderr, "******NXGetFontParameters: Got font path of [%d] bytes and value [",
               (int) *path_data);
@@ -1276,7 +1311,7 @@ unsigned int NXAllocSplit(Display *dpy, unsigned int resource)
       {
         _NXSplitResources[resource] = 1;
 
-        #ifdef TEST
+        #ifdef TEST_SPLIT
         fprintf(stderr, "******NXAllocSplit: Reserved resource [%u].\n",
                     resource);
         #endif
@@ -1285,7 +1320,7 @@ unsigned int NXAllocSplit(Display *dpy, unsigned int resource)
       }
     }
 
-    #ifdef TEST
+    #ifdef TEST_SPLIT
     fprintf(stderr, "******NXAllocSplit: WARNING! Resource limit exausted.\n");
     #endif
 
@@ -1293,7 +1328,7 @@ unsigned int NXAllocSplit(Display *dpy, unsigned int resource)
   }
   else if (resource >= 0 && resource < NXNumberOfResources)
   {
-    #ifdef TEST
+    #ifdef TEST_SPLIT
 
     if (_NXSplitResources[resource] == 0)
     {
@@ -1334,7 +1369,7 @@ int NXStartSplit(Display *dpy, unsigned int resource, unsigned int mode)
   req -> resource = resource;
   req -> mode     = mode;
 
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   fprintf(stderr, "******NXStartSplit: Sending opcode [%d] with resource [%d] mode [%d].\n",
               X_NXStartSplit, resource, mode);
   #endif
@@ -1361,7 +1396,7 @@ int NXEndSplit(Display *dpy, unsigned int resource)
 
   req -> resource = resource;
 
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   fprintf(stderr, "******NXEndSplit: Sending opcode [%d] with resource [%d].\n",
               X_NXStartSplit, resource);
   #endif
@@ -1395,7 +1430,7 @@ int NXCommitSplit(Display *dpy, unsigned int resource, unsigned int propagate,
   req -> request   = request;
   req -> position  = position;
 
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   fprintf(stderr, "******NXCommitSplit: Sending opcode [%d] with resource [%d] propagate [%d] "
               "request [%d] position [%d].\n", X_NXCommitSplit, resource,
                   propagate, request, position);
@@ -1416,7 +1451,7 @@ int NXAbortSplit(Display *dpy, unsigned int resource)
 
   GetReq(NXAbortSplit, req);
 
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   fprintf(stderr, "******NXAbortSplit: Sending message opcode [%d] with resource [%u].\n",
               X_NXAbortSplit, resource);
   #endif
@@ -1438,7 +1473,7 @@ int NXFinishSplit(Display *dpy, unsigned int resource)
 
   GetReq(NXFinishSplit, req);
 
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   fprintf(stderr, "******NXFinishSplit: Sending message opcode [%d] with resource [%u].\n",
               X_NXFinishSplit, resource);
   #endif
@@ -1462,7 +1497,7 @@ int NXFreeSplit(Display *dpy, unsigned int resource)
 
     GetReq(NXFreeSplit, req);
 
-    #ifdef TEST
+    #ifdef TEST_SPLIT
     fprintf(stderr, "******NXFreeSplit: Sending message opcode [%d] with resource [%u].\n",
                 X_NXFreeSplit, resource);
     #endif
@@ -1473,14 +1508,14 @@ int NXFreeSplit(Display *dpy, unsigned int resource)
 
     SyncHandle();
 
-    #ifdef TEST
+    #ifdef TEST_SPLIT
     fprintf(stderr, "******NXFreeSplit: Making the resource [%u] newly available.\n",
                 resource);
     #endif
 
     _NXSplitResources[resource] = 0;
   }
-  #ifdef TEST
+  #ifdef TEST_SPLIT
   else
   {
     fprintf(stderr, "******NXFreeSplit: Nothing to do for resource [%u].\n",
@@ -1508,7 +1543,7 @@ int NXSetExposeParameters(Display *dpy, int expose, int graphics_expose, int no_
   req -> graphicsExpose = graphics_expose;
   req -> noExpose       = no_expose;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXSetExposeParameters: Sending message opcode [%d] with flags [%d][%d][%d].\n",
               X_NXSetExposeParameters, req -> expose, req -> graphicsExpose, req -> noExpose);
   #endif
@@ -1538,7 +1573,7 @@ int NXSetCacheParameters(Display *dpy, int enable_cache, int enable_split,
   req -> enableSave  = enable_save;
   req -> enableLoad  = enable_load;
 
-  #ifdef TEST
+  #ifdef TEST_PARAMS
   fprintf(stderr, "******NXSetCacheParameters: Sending message opcode [%d] with "
               "flags [%d][%d][%d][%d].\n", X_NXSetCacheParameters, req -> enableCache,
                   req -> enableSplit, req -> enableSave, req -> enableLoad);
@@ -1561,7 +1596,7 @@ unsigned int NXAllocUnpack(Display *dpy, unsigned int resource)
       {
         _NXUnpackResources[resource] = 1;
 
-        #ifdef TEST
+        #ifdef TEST_UNPACK
         fprintf(stderr, "******NXAllocUnpack: Reserved resource [%u].\n",
                     resource);
         #endif
@@ -1570,7 +1605,7 @@ unsigned int NXAllocUnpack(Display *dpy, unsigned int resource)
       }
     }
 
-    #ifdef TEST
+    #ifdef TEST_UNPACK
     fprintf(stderr, "******NXAllocUnpack: WARNING! Resource limit exausted.\n");
     #endif
 
@@ -1578,7 +1613,7 @@ unsigned int NXAllocUnpack(Display *dpy, unsigned int resource)
   }
   else if (resource >= 0 && resource < NXNumberOfResources)
   {
-    #ifdef TEST
+    #ifdef TEST_UNPACK
 
     if (_NXUnpackResources[resource] == 0)
     {
@@ -1640,7 +1675,7 @@ int NXSetUnpackGeometry(Display *dpy, unsigned int resource, Visual *visual)
     return -1;
   }
 
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   fprintf(stderr, "******NXSetUnpackGeometry: Resource [%u] Depth/Bpp [1/%d][4/%d][8/%d]"
               "[16/%d][24/%d][32/%d].\n", resource, req -> depth1Bpp, req -> depth4Bpp,
                   req -> depth8Bpp, req -> depth16Bpp, req -> depth24Bpp, req -> depth32Bpp);
@@ -1683,7 +1718,7 @@ int NXSetUnpackColormap(Display *dpy, unsigned int resource, unsigned int method
 
   req -> length += (dst_data_length >> 2);
 
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   fprintf(stderr, "******NXSetUnpackColormap: Resource [%u] data size [%u] destination "
               "data size [%u].\n", resource, data_length, dst_data_length);
   #endif
@@ -1746,7 +1781,7 @@ int NXSetUnpackAlpha(Display *dpy, unsigned int resource, unsigned int method,
 
   req -> length += (dst_data_length >> 2);
 
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   fprintf(stderr, "******NXSetUnpackAlpha: Resource [%u] data size [%u] destination data size [%u].\n",
               resource, data_length, dst_data_length);
   #endif
@@ -1812,12 +1847,6 @@ int NXSetUnpackColormapCompat(Display *dpy, unsigned int resource,
 
   register int dst_data_length;
 
-  #ifdef DUMP
-
-  int i;
-
-  #endif
-
   LockDisplay(dpy);
 
   GetReq(NXSetUnpackColormapCompat, req);
@@ -1829,7 +1858,7 @@ int NXSetUnpackColormapCompat(Display *dpy, unsigned int resource,
 
   req -> length += (dst_data_length >> 2);
 
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   fprintf(stderr, "******NXSetUnpackColormapCompat: Resource [%u] number of entries [%u] "
               "destination data size [%u].\n", resource, entries, dst_data_length);
   #endif
@@ -1862,7 +1891,7 @@ int NXSetUnpackColormapCompat(Display *dpy, unsigned int resource,
 
     fprintf(stderr, "******NXSetUnpackColormapCompat: Dumping colormap entries:\n");
 
-    for (i = 0; i < entries; i++)
+    for (int i = 0; i < entries; i++)
     {
       fprintf(stderr, "******NXSetUnpackColormapCompat: [%d] -> [0x%x].\n",
                   i, *((int *) (dst_data + (i * 4))));
@@ -1907,12 +1936,6 @@ int NXSetUnpackAlphaCompat(Display *dpy, unsigned int resource,
 
   register unsigned int dst_data_length;
 
-  #ifdef DUMP
-
-  int i;
-
-  #endif
-
   LockDisplay(dpy);
 
   GetReq(NXSetUnpackAlphaCompat, req);
@@ -1924,7 +1947,7 @@ int NXSetUnpackAlphaCompat(Display *dpy, unsigned int resource,
 
   req -> length += (dst_data_length >> 2);
 
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   fprintf(stderr, "******NXSetUnpackAlphaCompat: Resource [%u] number of entries [%u] "
               "destination data size [%u].\n", resource, entries, dst_data_length);
   #endif
@@ -1962,7 +1985,7 @@ int NXSetUnpackAlphaCompat(Display *dpy, unsigned int resource,
 
     fprintf(stderr, "******NXSetUnpackAlphaCompat: Dumping alpha channel data:\n");
 
-    for (i = 0; i < dst_data_length; i++)
+    for (int i = 0; i < dst_data_length; i++)
     {
       fprintf(stderr, "******NXSetUnpackAlphaCompat: [%d] -> [0x%02x].\n",
                   i, ((unsigned int) *(dst_data + i)) & 0xff);
@@ -2004,7 +2027,7 @@ int NXFreeUnpack(Display *dpy, unsigned int resource)
 
     GetReq(NXFreeUnpack, req);
 
-    #ifdef TEST
+    #ifdef TEST_UNPACK
     fprintf(stderr, "******NXFreeUnpack: Sending message opcode [%d] with resource [%u].\n",
                 X_NXFreeUnpack, resource);
     #endif
@@ -2015,14 +2038,14 @@ int NXFreeUnpack(Display *dpy, unsigned int resource)
 
     SyncHandle();
 
-    #ifdef TEST
+    #ifdef TEST_UNPACK
     fprintf(stderr, "******NXFreeUnpack: Making the resource [%u] newly available.\n",
                 resource);
     #endif
 
     _NXUnpackResources[resource] = 0;
   }
-  #ifdef TEST
+  #ifdef TEST_UNPACK
   else
   {
     fprintf(stderr, "******NXFreeUnpack: Nothing to do for resource [%u].\n",
@@ -2074,7 +2097,7 @@ int NXDestroyPackedImage(NXPackedImage *image)
 
 int NXCleanImage(XImage *image)
 {
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXCleanImage: Cleaning image with format [%d] depth [%d] "
               "bits per pixel [%d].\n", image -> format, image -> depth,
                   image -> bits_per_pixel);
@@ -2109,7 +2132,7 @@ NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
   unsigned int dst_bits_per_pixel;
   unsigned int dst_packed_bits_per_pixel;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPackImage: Going to pack a new image with method [%d].\n",
               method);
   #endif
@@ -2161,7 +2184,7 @@ NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
 
   *dst_image = *src_image;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPackImage: Source width [%d], bytes per line [%d] with depth [%d].\n",
               src_image -> width, src_image -> bytes_per_line, src_image -> depth);
   #endif
@@ -2192,7 +2215,7 @@ NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
   dst_bits_per_pixel = dst_image -> bits_per_pixel;
   dst_packed_bits_per_pixel = MethodBitsPerPixel(method);
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPackImage: Destination depth [%d], bits per pixel [%d], packed bits per pixel [%d].\n",
              dst_image -> depth, dst_bits_per_pixel, dst_packed_bits_per_pixel);
   #endif
@@ -2239,7 +2262,7 @@ NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
    * be able to handle ovelapping areas.
    */
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPackImage: Plain bits per pixel [%d], data size [%d].\n",
               dst_bits_per_pixel, dst_data_size);
   #endif
@@ -2247,7 +2270,7 @@ NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
   dst_packed_data_size = dst_data_size * dst_packed_bits_per_pixel /
                               dst_bits_per_pixel;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPackImage: Packed bits per pixel [%d], data size [%d].\n",
               dst_packed_bits_per_pixel, dst_packed_data_size);
   #endif
@@ -2296,7 +2319,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
   unsigned int dst_bits_per_pixel;
   unsigned int dst_packed_bits_per_pixel;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXInPlacePackImage: Going to pack a new image with method [%d].\n",
               method);
   #endif
@@ -2347,7 +2370,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
 
   *dst_image = *src_image;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXInPlacePackImage: Source width [%d], bytes per line [%d] with depth [%d].\n",
               src_image -> width, src_image -> bytes_per_line, src_image -> depth);
   #endif
@@ -2365,7 +2388,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
   dst_bits_per_pixel = dst_image -> bits_per_pixel;
   dst_packed_bits_per_pixel = MethodBitsPerPixel(method);
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXInPlacePackImage: Destination depth [%d], bits per pixel [%d], packed bits per pixel [%d].\n",
               dst_image -> depth, dst_bits_per_pixel, dst_packed_bits_per_pixel);
   #endif
@@ -2373,7 +2396,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
   if (dst_packed_bits_per_pixel > dst_bits_per_pixel ||
           ShouldMaskImage(src_image, mask) == 0)
   {
-    #ifdef TEST
+    #ifdef TEST_IMAGE
     fprintf(stderr, "******NXInPlacePackImage: Just clean image packed_bits_per_pixel[%d], bits_per_pixel[%d].\n",
                 dst_packed_bits_per_pixel, dst_bits_per_pixel);
     #endif
@@ -2408,7 +2431,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
    * be able to handle ovelapping areas.
    */
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXInPlacePackImage: Plain bits per pixel [%d], data size [%d].\n",
              dst_bits_per_pixel, dst_data_size);
   #endif
@@ -2416,7 +2439,7 @@ XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
   dst_packed_data_size = dst_data_size * dst_packed_bits_per_pixel /
     dst_bits_per_pixel;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXInPlacePackImage: Packed bits per pixel [%d], data size [%d].\n",
              dst_packed_bits_per_pixel, dst_packed_data_size);
   #endif
@@ -2451,7 +2474,7 @@ int NXPutPackedImage(Display *dpy, unsigned int resource, Drawable drawable,
   req -> drawable = drawable;
   req -> gc = ((GC) gc) -> gid;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPutPackedImage: Image resource [%d] drawable [%d] gc [%d].\n",
               req -> resource, (int) req -> drawable, (int) req -> gc);
   #endif
@@ -2492,7 +2515,7 @@ int NXPutPackedImage(Display *dpy, unsigned int resource, Drawable drawable,
 
   req -> method = method;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPutPackedImage: Source image depth [%d] destination depth [%d] "
               "method [%d].\n", req -> srcDepth, req -> dstDepth, req -> method);
   #endif
@@ -2526,7 +2549,7 @@ int NXPutPackedImage(Display *dpy, unsigned int resource, Drawable drawable,
 
   dst_data_length = ROUNDUP(src_data_length, 4);
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXPutPackedImage: Source data length [%d] request data length [%d].\n",
               src_data_length, dst_data_length);
   #endif
@@ -2573,11 +2596,9 @@ int NXAllocColors(Display *dpy, Colormap colormap, unsigned int entries,
 
   Bool alloc_error = False;
 
-  register unsigned int i;
-
   LockDisplay(dpy);
 
-  for (i = 0; i < entries; i++)
+  for (unsigned int i = 0; i < entries; i++)
   {
     GetReq(AllocColor, req);
 
@@ -2588,7 +2609,7 @@ int NXAllocColors(Display *dpy, Colormap colormap, unsigned int entries,
     req -> blue  = screens_in_out[i].blue;
   }
 
-  for (i = 0; i < entries; i++)
+  for (unsigned int i = 0; i < entries; i++)
   {
     result = _XReply(dpy, (xReply *) &rep, 0, xTrue);
 
@@ -2941,7 +2962,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_8_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_8_COLORS\n");
       #endif
 
@@ -2952,7 +2973,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_64_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_64K_COLORS\n");
       #endif
 
@@ -2963,7 +2984,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_256_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_256_COLORS\n");
       #endif
 
@@ -2974,7 +2995,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_512_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_512K_COLORS\n");
       #endif
 
@@ -2985,7 +3006,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_4K_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_4K_COLORS\n");
       #endif
 
@@ -2996,7 +3017,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_32K_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_32K_COLORS\n");
       #endif
 
@@ -3007,7 +3028,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_64K_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_64K_COLORS\n");
       #endif
 
@@ -3018,7 +3039,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_256K_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_256K_COLORS\n");
       #endif
 
@@ -3029,7 +3050,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_2M_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_2M_COLORS\n");
       #endif
 
@@ -3040,7 +3061,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     {
       maskMethod = MASK_16M_COLORS;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXMaskImage: Method is MASK_16M_COLORS\n");
       #endif
 
@@ -3057,7 +3078,7 @@ void NXMaskImage(XImage *image, unsigned int method)
     }
   }
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXMaskImage: packMethod[%d] => maskMethod[%d]\n",
               method, maskMethod);
   #endif
@@ -3100,7 +3121,7 @@ void NXMaskImage(XImage *image, unsigned int method)
 
   if (ShouldMaskImage(image, mask) == 0)
   {
-    #ifdef TEST
+    #ifdef TEST_IMAGE
     fprintf(stderr, "******NXMaskImage: the image will not be masked\n");
     #endif
   }
@@ -3123,7 +3144,7 @@ void NXInitCache(Display *dpy, int entries)
 {
   if (NXImageCache != NULL && NXImageCacheSize == entries)
   {
-    #ifdef DEBUG
+    #ifdef DEBUG_IMAGE
     fprintf(stderr, "******NXInitCache: Nothing to do with image cache at [%p] and [%d] entries.\n",
                 NXImageCache,  NXImageCacheSize);
     #endif
@@ -3131,7 +3152,7 @@ void NXInitCache(Display *dpy, int entries)
     return;
   }
 
-  #ifdef DEBUG
+  #ifdef DEBUG_IMAGE
   fprintf(stderr, "******NXInitCache: Initializing the cache with [%d] entries.\n",
               entries);
   #endif
@@ -3150,7 +3171,7 @@ void NXInitCache(Display *dpy, int entries)
 
       NXImageCacheSize = entries;
 
-      #ifdef DEBUG
+      #ifdef DEBUG_IMAGE
       fprintf(stderr, "******NXInitCache: Image cache initialized with [%d] entries.\n", entries);
       #endif
     }
@@ -3163,26 +3184,23 @@ void _NXCacheDump(const char *label)
 {
   char s[MD5_LENGTH * 2 + 1];
 
-  int i;
-  int j;
-
-  #ifdef DEBUG
+  #ifdef DEBUG_IMAGE
   fprintf(stderr, "%s: Dumping the content of image cache:\n", label);
   #endif
 
-  for (i = 0; i < NXImageCacheSize; i++)
+  for (int i = 0; i < NXImageCacheSize; i++)
   {
     if (NXImageCache[i].image == NULL)
     {
       break;
     }
 
-    for (j = 0; j < MD5_LENGTH; j++)
+    for (int j = 0; j < MD5_LENGTH; j++)
     {
       sprintf(s + (j * 2), "%02X", ((unsigned char *) NXImageCache[i].md5)[j]);
     }
 
-    #ifdef DEBUG
+    #ifdef DEBUG_IMAGE
     fprintf(stderr, "%s: [%d][%s].\n", label, i, s);
     #endif
   }
@@ -3244,7 +3262,7 @@ XImage *NXCacheFindImage(NXPackedImage *src_image, unsigned int *method, unsigne
 
         NXImageCacheHits++;
 
-        #ifdef DEBUG
+        #ifdef DEBUG_IMAGE
         fprintf(stderr, "******NXCacheFindImage: Found at position [%d] with hits [%d] and [%d] packs.\n",
                     i, NXImageCacheHits, NXImageCacheOps);
         #endif
@@ -3259,7 +3277,7 @@ XImage *NXCacheFindImage(NXPackedImage *src_image, unsigned int *method, unsigne
 
         if (i > 16)
         {
-          #ifdef DEBUG
+          #ifdef DEBUG_IMAGE
           fprintf(stderr, "******NXCacheFindImage: Moving the image at the head of the list.\n");
           #endif
 
@@ -3320,7 +3338,7 @@ int NXCacheAddImage(NXPackedImage *image, unsigned int method, unsigned char *md
 
   if (NXImageCacheOps >= NXImageCacheSize)
   {
-    #ifdef DEBUG
+    #ifdef DEBUG_IMAGE
     fprintf(stderr, "******NXCacheAddImage: Freeing up the oldest entry.\n");
     #endif
 
@@ -3338,7 +3356,7 @@ int NXCacheAddImage(NXPackedImage *image, unsigned int method, unsigned char *md
 
   NXImageCacheOps++;
 
-  #ifdef DEBUG
+  #ifdef DEBUG_IMAGE
   fprintf(stderr, "******NXCacheAddImage: Going to add new image with data size [%d].\n",
               image -> xoffset);
   #endif
@@ -3362,23 +3380,21 @@ int NXCacheAddImage(NXPackedImage *image, unsigned int method, unsigned char *md
 
 void NXFreeCache(Display *dpy)
 {
-  int i;
-
   if (NXImageCache == NULL)
   {
-    #ifdef DEBUG
+    #ifdef DEBUG_IMAGE
     fprintf(stderr, "******NXFreeCache: Nothing to do with a null image cache.\n");
     #endif
 
     return;
   }
 
-  #ifdef DEBUG
+  #ifdef DEBUG_IMAGE
   fprintf(stderr, "******NXFreeCache: Freeing the cache with [%d] entries.\n",
               NXImageCacheSize);
   #endif
 
-  for (i = 0; i < NXImageCacheSize; i++)
+  for (int i = 0; i < NXImageCacheSize; i++)
   {
     if (NXImageCache[i].image != NULL)
     {
@@ -3434,11 +3450,18 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
 
   state = (_NXCollectImageState *) data;
 
+  #ifdef DEBUG_IMAGE
+  fprintf(stderr, "******%s: sequence: received [%hu] expected [%lu]  16bit received [%hu] expected [%hu]\n",
+          __func__,
+          rep -> generic.sequenceNumber, state -> sequence,
+          rep -> generic.sequenceNumber % 65536, (CARD16)(state -> sequence) % 65536);
+  #endif
+
   if ((rep -> generic.sequenceNumber % 65536) !=
           ((CARD16)(state -> sequence) % 65536))
   {
-    #ifdef TEST
-    fprintf(stderr, "******_NXCollectImageHandler: Unmatched sequence [%d] for opcode [%d] "
+    #ifdef TEST_IMAGE
+    fprintf(stderr, "******_NXCollectImageHandler: Unmatched sequence [%d] of type [%d] "
                 "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
                     (int) rep -> generic.length << 2);
     #endif
@@ -3446,7 +3469,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******_NXCollectImageHandler: Going to handle asynchronous GetImage reply.\n");
   #endif
 
@@ -3463,7 +3486,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
 
   if (rep -> generic.type == X_Error)
   {
-    #ifdef TEST
+    #ifdef TEST_IMAGE
     fprintf(stderr, "******_NXCollectImageHandler: Error received from X server for resource [%d].\n",
                 state -> resource);
     #endif
@@ -3477,7 +3500,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******_NXCollectImageHandler: Matched request with sequence [%ld].\n",
               state -> sequence);
   #endif
@@ -3502,7 +3525,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******_NXCollectImageHandler: Going to get reply with size [%d].\n",
               (int) rep -> generic.length << 2);
   #endif
@@ -3527,7 +3550,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******_NXCollectImageHandler: Got reply with depth [%d] visual [%d] size [%d].\n",
               async_rep -> depth, (int) async_rep -> visual, (int) async_rep -> length << 2);
   #endif
@@ -3556,7 +3579,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
       return False;
     }
 
-    #ifdef TEST
+    #ifdef TEST_IMAGE
     fprintf(stderr, "******_NXCollectImageHandler: Going to get data with size [%d].\n",
                 async_size);
     #endif
@@ -3603,7 +3626,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
       return True;
     }
 
-    #ifdef TEST
+    #ifdef TEST_IMAGE
     fprintf(stderr, "******_NXCollectImageHandler: Successfully stored image data for resource [%d].\n",
                 state -> resource);
     #endif
@@ -3625,9 +3648,7 @@ static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
 
 int NXGetCollectImageResource(Display *dpy)
 {
-  int i;
-
-  for (i = 0; i < NXNumberOfResources; i++)
+  for (int i = 0; i < NXNumberOfResources; i++)
   {
     if (_NXCollectedImages[i] == NULL)
     {
@@ -3638,6 +3659,12 @@ int NXGetCollectImageResource(Display *dpy)
   return -1;
 }
 
+/*
+ * return codes:
+ * 0          no data found for resource (currently unused)
+ * -1         Failed
+ * True (1)   Handler has been installed, will generate NXCollectImageNotify event when answer arrives
+ */
 int NXCollectImage(Display *dpy, unsigned int resource, Drawable drawable,
                        int src_x, int src_y, unsigned int width, unsigned int height,
                            unsigned long plane_mask, int format)
@@ -3695,7 +3722,7 @@ int NXCollectImage(Display *dpy, unsigned int resource, Drawable drawable,
   req -> height    = height;
   req -> planeMask = plane_mask;
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXCollectImage: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
               X_GetImage, dpy -> request, resource);
 
@@ -3772,7 +3799,7 @@ int NXGetCollectedImage(Display *dpy, unsigned int resource, XImage **image)
 
   SAFE_free(state);
 
-  #ifdef TEST
+  #ifdef TEST_IMAGE
   fprintf(stderr, "******NXGetCollectedImage: Returning GetImage data for resource [%u].\n",
               resource);
   #endif
@@ -3818,19 +3845,27 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
 
   state = (_NXCollectPropertyState *) data;
 
+  #ifdef DEBUG_PROPERTY
+  fprintf(stderr, "******%s: sequence: received [%hu] expected [%lu]  16bit received [%hu] expected [%hu]\n",
+          __func__,
+          rep -> generic.sequenceNumber, state -> sequence,
+          rep -> generic.sequenceNumber % 65536, (CARD16)(state -> sequence) % 65536);
+  #endif
+
   if ((rep -> generic.sequenceNumber % 65536) !=
           ((CARD16)(state -> sequence) % 65536))
   {
-    #ifdef TEST
-    fprintf(stderr, "******_NXCollectPropertyHandler: Unmatched sequence [%d] for opcode [%d] "
-                "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
+    #ifdef TEST_PROPERTY
+    fprintf(stderr, "******_NXCollectPropertyHandler: Unmatched sequence [%d] of type [%d] "
+            "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
                     (int) rep -> generic.length << 2);
+
     #endif
 
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******_NXCollectPropertyHandler: Going to handle asynchronous GetProperty reply.\n");
   #endif
 
@@ -3847,7 +3882,7 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
 
   if (rep -> generic.type == X_Error)
   {
-    #ifdef TEST
+    #ifdef TEST_PROPERTY
     fprintf(stderr, "******_NXCollectPropertyHandler: Error received from X server for resource [%d].\n",
                 state -> resource);
     #endif
@@ -3861,7 +3896,7 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******_NXCollectPropertyHandler: Matched request with sequence [%ld].\n",
               state -> sequence);
   #endif
@@ -3886,7 +3921,7 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******_NXCollectPropertyHandler: Going to get reply with size [%d].\n",
               (int) rep -> generic.length << 2);
   #endif
@@ -3911,7 +3946,7 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******_NXCollectPropertyHandler: Got reply with format [%d] type [%d] size [%d].\n",
               async_rep -> format, (int) async_rep -> propertyType, (int) async_rep -> length << 2);
 
@@ -3948,7 +3983,7 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
       return False;
     }
 
-    #ifdef TEST
+    #ifdef TEST_PROPERTY
     fprintf(stderr, "******_NXCollectPropertyHandler: Going to get data with size [%d].\n",
                 async_size);
     #endif
@@ -3962,12 +3997,12 @@ static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
 
     state -> data = async_data;
 
-    #ifdef TEST
+    #ifdef TEST_PROPERTY
     fprintf(stderr, "******_NXCollectPropertyHandler: Successfully stored property data for resource [%d].\n",
                 state -> resource);
     #endif
   }
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   else
   {
     fprintf(stderr, "******_NXCollectPropertyHandler: WARNING! Null property data stored for resource [%d].\n",
@@ -3995,6 +4030,12 @@ int NXGetCollectPropertyResource(Display *dpy)
   return -1;
 }
 
+/*
+ * return codes:
+ * 0      no data found for resource (currently unused)
+ * -1     Failed
+ * True   Handler has been installed, will generate NXCollectPropertyNotify event when answer arrives
+ */
 int NXCollectProperty(Display *dpy, unsigned int resource, Window window, Atom property,
                           long long_offset, long long_length, Bool delete, Atom req_type)
 {
@@ -4046,7 +4087,7 @@ int NXCollectProperty(Display *dpy, unsigned int resource, Window window, Atom p
   req -> longOffset = long_offset;
   req -> longLength = long_length;
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******NXCollectProperty: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
               X_GetProperty, dpy -> request, resource);
 
@@ -4103,6 +4144,11 @@ int NXCollectProperty(Display *dpy, unsigned int resource, Window window, Atom p
   return True;
 }
 
+/*
+ * return codes:
+ * 0     not data available
+ * True  success
+ */
 int NXGetCollectedProperty(Display *dpy, unsigned int resource, Atom *actual_type_return,
                                int *actual_format_return, unsigned long *nitems_return,
                                    unsigned long *bytes_after_return, unsigned char **data)
@@ -4132,7 +4178,7 @@ int NXGetCollectedProperty(Display *dpy, unsigned int resource, Atom *actual_typ
 
   _NXCollectedProperties[resource] = NULL;
 
-  #ifdef TEST
+  #ifdef TEST_PROPERTY
   fprintf(stderr, "******NXGetCollectedProperty: Returning GetProperty data for resource [%u].\n",
               resource);
   #endif
@@ -4172,11 +4218,18 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
 
   state = (_NXCollectGrabPointerState *) data;
 
+  #ifdef DEBUG_POINTER
+  fprintf(stderr, "******%s: sequence: received [%hu] expected [%lu]  16bit received [%hu] expected [%hu]\n",
+          __func__,
+          rep -> generic.sequenceNumber, state -> sequence,
+          rep -> generic.sequenceNumber % 65536, (CARD16)(state -> sequence) % 65536);
+  #endif
+
   if ((rep -> generic.sequenceNumber % 65536) !=
           ((CARD16)(state -> sequence) % 65536))
   {
-    #ifdef TEST
-    fprintf(stderr, "******_NXCollectGrabPointerHandler: Unmatched sequence [%d] for opcode [%d] "
+    #ifdef TEST_POINTER
+    fprintf(stderr, "******_NXCollectGrabPointerHandler: Unmatched sequence [%d] of type [%d] "
                 "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
                     (int) rep -> generic.length << 2);
     #endif
@@ -4184,7 +4237,7 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******_NXCollectGrabPointerHandler: Going to handle asynchronous GrabPointer reply.\n");
   #endif
 
@@ -4194,7 +4247,7 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
 
   if (rep -> generic.type == X_Error)
   {
-    #ifdef TEST
+    #ifdef TEST_POINTER
     fprintf(stderr, "******_NXCollectGrabPointerHandler: Error received from X server for resource [%d].\n",
                 state -> resource);
     #endif
@@ -4208,7 +4261,7 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******_NXCollectGrabPointerHandler: Matched request with sequence [%ld].\n",
               state -> sequence);
   #endif
@@ -4233,7 +4286,7 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******_NXCollectGrabPointerHandler: Going to get reply with size [%d].\n",
               (int) rep -> generic.length << 2);
   #endif
@@ -4258,7 +4311,7 @@ static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******_NXCollectGrabPointerHandler: Got reply with status [%d] size [%d].\n",
               async_rep -> status, (int) async_rep -> length << 2);
   #endif
@@ -4285,6 +4338,12 @@ int NXGetCollectGrabPointerResource(Display *dpy)
   return -1;
 }
 
+/*
+ * return codes:
+ * 0      no data found for resource
+ * -1     Failed
+ * True   Handler has been installed, will generate NXCollectGrabPointerNotify event when answer arrives
+ */
 int NXCollectGrabPointer(Display *dpy, unsigned int resource, Window grab_window, Bool owner_events,
                              unsigned int event_mask, int pointer_mode, int keyboard_mode,
                                  Window confine_to, Cursor cursor, Time time)
@@ -4338,7 +4397,7 @@ int NXCollectGrabPointer(Display *dpy, unsigned int resource, Window grab_window
   req -> cursor       = cursor;
   req -> time         = time;
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******NXCollectGrabPointer: Sending message opcode [%d] sequence [%ld] "
               "for resource [%d].\n", X_GrabPointer, dpy -> request, resource);
   #endif
@@ -4384,6 +4443,11 @@ int NXCollectGrabPointer(Display *dpy, unsigned int resource, Window grab_window
   return True;
 }
 
+/*
+ * return codes:
+ * 0     not data available
+ * True  success
+ */
 int NXGetCollectedGrabPointer(Display *dpy, unsigned int resource, int *status)
 {
   register _NXCollectGrabPointerState *state;
@@ -4406,7 +4470,7 @@ int NXGetCollectedGrabPointer(Display *dpy, unsigned int resource, int *status)
 
   _NXCollectedGrabPointers[resource] = NULL;
 
-  #ifdef TEST
+  #ifdef TEST_POINTER
   fprintf(stderr, "******NXGetCollectedGrabPointer: Returning GrabPointer data for resource [%u].\n",
               resource);
   #endif
@@ -4446,11 +4510,18 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
 
   state = (_NXCollectInputFocusState *) data;
 
+  #ifdef DEBUG_INPUT
+  fprintf(stderr, "******%s: sequence: received [%hu] expected [%lu]  16bit received [%hu] expected [%hu]\n",
+          __func__,
+          rep -> generic.sequenceNumber, state -> sequence,
+          rep -> generic.sequenceNumber % 65536, (CARD16)(state -> sequence) % 65536);
+  #endif
+
   if ((rep -> generic.sequenceNumber % 65536) !=
           ((CARD16)(state -> sequence) % 65536))
   {
-    #ifdef TEST
-    fprintf(stderr, "******_NXCollectInputFocusHandler: Unmatched sequence [%d] for opcode [%d] "
+    #ifdef TEST_INPUT
+    fprintf(stderr, "******_NXCollectInputFocusHandler: Unmatched sequence [%d] of type [%d] "
                 "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
                     (int) rep -> generic.length << 2);
     #endif
@@ -4458,7 +4529,7 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******_NXCollectInputFocusHandler: Going to handle asynchronous GetInputFocus reply.\n");
   #endif
 
@@ -4468,7 +4539,7 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
 
   if (rep -> generic.type == X_Error)
   {
-    #ifdef TEST
+    #ifdef TEST_INPUT
     fprintf(stderr, "******_NXCollectInputFocusHandler: Error received from X server for resource [%d].\n",
                 state -> resource);
     #endif
@@ -4482,7 +4553,7 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******_NXCollectInputFocusHandler: Matched request with sequence [%ld].\n",
               state -> sequence);
   #endif
@@ -4507,7 +4578,7 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******_NXCollectInputFocusHandler: Going to get reply with size [%d].\n",
               (int) rep -> generic.length << 2);
   #endif
@@ -4532,7 +4603,7 @@ static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
     return False;
   }
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******_NXCollectInputFocusHandler: Got reply with focus [%d] revert to [%d] "
               "size [%d].\n", (int) async_rep -> focus, (int) async_rep -> revertTo,
                   (int) async_rep -> length << 2);
@@ -4561,6 +4632,12 @@ int NXGetCollectInputFocusResource(Display *dpy)
   return -1;
 }
 
+/*
+ * return codes:
+ * 0          no data found for resource (currently unused)
+ * -1         Failed
+ * True (1)   Handler has been installed, will generate NXCollectInputFocusNotify event when answer arrives
+ */
 int NXCollectInputFocus(Display *dpy, unsigned int resource)
 {
   _X_UNUSED register xReq *req;
@@ -4603,7 +4680,7 @@ int NXCollectInputFocus(Display *dpy, unsigned int resource)
 
   GetEmptyReq(GetInputFocus, req);
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******NXCollectInputFocus: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
               X_GetInputFocus, dpy -> request, resource);
   #endif
@@ -4650,6 +4727,11 @@ int NXCollectInputFocus(Display *dpy, unsigned int resource)
   return True;
 }
 
+/*
+ * return codes:
+ * 0     not data available
+ * True  success
+ */
 int NXGetCollectedInputFocus(Display *dpy, unsigned int resource,
                                  Window *focus_return, int *revert_to_return)
 {
@@ -4674,7 +4756,7 @@ int NXGetCollectedInputFocus(Display *dpy, unsigned int resource,
 
   _NXCollectedInputFocuses[resource] = NULL;
 
-  #ifdef TEST
+  #ifdef TEST_INPUT
   fprintf(stderr, "******NXGetCollectedInputFocus: Returning GetInputFocus data for resource [%u].\n",
               resource);
   #endif
diff --git a/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1 b/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1
index 2a83a5afb..74349cda7 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1
+++ b/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1
@@ -459,6 +459,9 @@ The nx-X11 system adds the following command line arguments:
 .B \-forcenx
 force use of NX protocol messages assuming communication through \fBnxproxy\fR
 .TP 8
+.B \-id \fIstring\fP
+The session id.
+.TP 8
 .B \-autograb
 enable autograb mode on \fBnxagent\fR startup. The autograb feature can be toggled via nxagent keystrokes
 .TP 8
@@ -503,8 +506,8 @@ nx/nx option on session resumption
 .B \-norender
 disable the use of the render extension
 .TP 8
-.B \-nocomposite
-disable the use of the composite extension
+.B \-nocomposite/-composite
+disable/enable the use of the composite extension (default ist disabled)
 .TP 8
 .B \-nopersistent
 disable disconnection/reconnection to the X display on
@@ -740,6 +743,9 @@ enable/disable shared pixmaps support. Accepted values: \fI1\fR (enable, default
 type of connecting operating system (supported: \fIlinux\fR,
 \fIwindows\fR, \fIsolaris\fR and \fImacosx\fR)
 .TP 8
+.B clients=<string>
+filename where to log output of the nxagent's clients. This is ignored if no session id has been provided. It then points to stderr. Default: <sessiondir>/clients.
+.TP 8
 .B shadow=<string>
 define the display that should be shadowed
 .TP 8
@@ -749,6 +755,9 @@ unique identifier for the shadow session
 .B shadowmode=<bool>
 full access (set to \fI1\fR) or viewing-only (set to \fI0\fR, default)
 .TP 8
+.B state=<string>
+filename where to store the state of the nxagent (for easier interoperation with software like x2go. Default: sessiondir/state.
+.TP 8
 .B defer=<int>
 defer image updates (enabled for all connection types except LAN),
 accepts values \fI0\fR, \fI1\fR and \fI2\fR
diff --git a/nx-X11/programs/Xserver/os/utils.c b/nx-X11/programs/Xserver/os/utils.c
index 853a33736..c788fae01 100644
--- a/nx-X11/programs/Xserver/os/utils.c
+++ b/nx-X11/programs/Xserver/os/utils.c
@@ -146,9 +146,7 @@ Bool noTestExtensions;
 Bool noBigReqExtension = FALSE;
 #endif
 #ifdef COMPOSITE
-/* COMPOSITE is disabled by default for now until the
- * interface is stable */
-Bool noCompositeExtension = TRUE;
+Bool noCompositeExtension = FALSE;
 #endif
 #ifdef DAMAGE
 Bool noDamageExtension = FALSE;