Imported nxcompshad-3.1.0-2.tar.gznxcompshad/3.1.0-2

Summary: Imported nxcompshad-3.1.0-2.tar.gz
Keywords:

Imported nxcompshad-3.1.0-2.tar.gz
into Git repository

1 files changed, 1130 insertions, 0 deletions

diff --git a/nxcompshad/Win.cpp b/nxcompshad/Win.cpp
new file mode 100644
index 000000000..9f8cdc9dd
--- /dev/null
+++ b/nxcompshad/Win.cpp
@@ -0,0 +1,1130 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of Medialogic S.p.A.                   */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#if defined(__CYGWIN32__) || defined(WIN32)
+
+#include <X11/keysym.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include "Poller.h"
+#include "Logger.h"
+
+Poller::Poller(Input *input, Display *display, int depth) : CorePoller(input, display)
+{
+  logTrace("Poller::Poller");
+
+  screenDC_ = NULL;
+  screenBmp_ = NULL;
+  memoryDC_ = NULL;
+  pDIBbits_ = NULL;
+  DIBBuffer_ = NULL;
+  pKey_ = NULL;
+  pMouse_ = NULL;
+  path_ = NULL;
+  keymapName_ = input -> getKeymap();
+  keymap_ = NULL;
+  toggleButtonState_ = 0;
+  serverModifierState_ = 0;
+  display_ = display;
+  depth_ = DefaultDepth(display_, DefaultScreen(display_));
+  oldCursor_ = 0;
+  xCursor_ = 0;
+}
+
+Poller::~Poller()
+{
+  logTrace("Poller::~Poller");
+
+  if (screenDC_)
+  {
+    BOOL result = ReleaseDC(NULL, screenDC_);
+
+    logTest("Poller::~Poller", "ReleaseDC returned [%d].", result);
+
+    screenDC_ = NULL;
+  }
+
+  if (memoryDC_)
+  {
+    BOOL result = DeleteDC(memoryDC_);
+
+    logTest("Poller::~Poller", "DeleteDC returned [%d].", result);
+
+    memoryDC_ = NULL;
+  }
+
+  if (screenBmp_)
+  {
+    BOOL result = DeleteObject(screenBmp_);
+
+    logTest("Poller::~Poller", "DeleteObject returned [%d].", result);
+
+    screenBmp_ = NULL;
+  }
+
+  if (DIBBuffer_)
+  {
+    logDebug("Poller::~Poller", "Delete DIBBuffer_ [%p].", DIBBuffer_);
+
+    delete [] DIBBuffer_;
+  }
+
+  if (pKey_)
+  {
+    logDebug("Poller::~Poller", " pKey_[%p].", pKey_);
+
+    delete [] pKey_;
+  }
+
+  if (pMouse_)
+  {
+    logDebug("Poller::~Poller", " pMouse_[%p].", pMouse_);
+
+    delete [] pMouse_;
+  }
+
+  if (keymap_)
+  {
+    logDebug("Poller::~Poller", " keymap_[%p].", keymap_);
+
+    delete [] keymap_;
+  }
+}
+
+int Poller::init()
+{
+  logTrace("Poller::init");
+
+  int maxLengthArrayINPUT = 6;
+
+  platformOS();
+
+  pKey_ = new INPUT [maxLengthArrayINPUT];
+
+  if (pKey_ == NULL)
+  {
+    logError("Poller::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  for (int i = 0; i < maxLengthArrayINPUT; i++)
+  {
+    pKey_[i].type = INPUT_KEYBOARD;
+    pKey_[i].ki.wVk = (WORD) 0;
+    pKey_[i].ki.time = (DWORD) 0;
+    pKey_[i].ki.dwExtraInfo = (DWORD) 0;
+  }
+
+  pMouse_ = new INPUT;
+
+  if (pMouse_ == NULL)
+  {
+    logError("Poller::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  pMouse_ -> type = INPUT_MOUSE;
+
+  pMouse_ -> mi.dx = 0;
+  pMouse_ -> mi.dy = 0;
+  pMouse_ -> mi.mouseData = (DWORD) 0;
+  pMouse_ -> mi.time = 0;
+  pMouse_ -> mi.dwExtraInfo = (ULONG_PTR) NULL;
+
+  screenDC_ = GetDC(NULL);
+
+  if (screenDC_ == NULL)
+  {
+    logError("Poller::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  switch(depth_)
+  {
+    case 8:
+    {
+      depth_ = 16;
+      break;
+    }
+    case 16:
+    {
+      depth_ = 16;
+      break;
+    }
+    case 24:
+    {
+      depth_ = 32;
+      break;
+    }
+    default:
+    {
+      logError("Poller::init", ESET(EINVAL));
+
+      return -1;
+    }
+  }
+
+  width_ = GetDeviceCaps(screenDC_, HORZRES);
+  height_ = GetDeviceCaps(screenDC_, VERTRES);
+
+  bpl_ = width_ * (depth_ >> 3);
+  bpp_ = (depth_ >> 3);
+
+  logTest("Poller::init", "Screen geometry is [%d, %d] depth is [%d] bpl [%d] bpp [%d].",
+              width_, height_, depth_, bpl_, bpp_);
+
+  logTest("Poller::init", "Got device context at [%p] screen size is (%d,%d).",
+            screenDC_, width_, height_);
+
+  memoryDC_ = CreateCompatibleDC(screenDC_);
+
+  if (memoryDC_ == NULL)
+  {
+    logError("Poller::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  //
+  // Delete the old bitmap for the memory device.
+  //
+
+  HBITMAP bitmap = (HBITMAP) GetCurrentObject(memoryDC_, OBJ_BITMAP);
+
+  if (bitmap && DeleteObject(bitmap) == 0)
+  {
+    logError("Poller::init", ESET(ENOMSG));
+  }
+
+  //
+  // Bitmap header describing the bitmap we want to get from GetDIBits.
+  //
+
+  bmi_.bmiHeader.biSize          = sizeof(BITMAPINFOHEADER);
+  bmi_.bmiHeader.biWidth         = width_;
+  bmi_.bmiHeader.biHeight        = -height_;
+  bmi_.bmiHeader.biPlanes        = 1;
+  bmi_.bmiHeader.biBitCount      = depth_;
+  bmi_.bmiHeader.biCompression   = BI_RGB;
+  bmi_.bmiHeader.biSizeImage     = 0;
+  bmi_.bmiHeader.biXPelsPerMeter = 0;
+  bmi_.bmiHeader.biYPelsPerMeter = 0;
+  bmi_.bmiHeader.biClrUsed       = 0;
+  bmi_.bmiHeader.biClrImportant  = 0;
+
+  screenBmp_ = CreateDIBSection(memoryDC_, &bmi_, DIB_RGB_COLORS, &pDIBbits_, NULL, 0);
+  ReleaseDC(NULL,memoryDC_);
+
+  if (screenBmp_ == NULL)
+  {
+    logTest ("Poller::init", "This video device is not supporting DIB section");
+
+    pDIBbits_ = NULL;
+
+    screenBmp_ = CreateCompatibleBitmap(screenDC_, width_, height_);
+
+    if (screenBmp_ == NULL)
+    {
+      logError("Poller::init", ESET(ENOMSG));
+
+      return -1;
+    }
+
+    if (SelectObject(memoryDC_, screenBmp_) == NULL)
+    {
+      logError("Poller::init", ESET(ENOMSG));
+
+      return -1;
+    }
+  }
+  else
+  {
+    logTest ("Poller::init", "Enabled the DIB section");
+
+    if (SelectObject(memoryDC_, screenBmp_) == NULL)
+    {
+      logError("Poller::init", ESET(ENOMSG));
+
+      return -1;
+    }
+  }
+
+  //
+  // Check if the screen device raster capabilities
+  // support the bitmap transfer.
+  //
+
+  if ((GetDeviceCaps(screenDC_, RASTERCAPS) & RC_BITBLT) == 0)
+  {
+    logTest("Poller::init", "This video device is not supporting the bitmap transfer.");
+
+    logError("Poller::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  //
+  // Check if the memory device raster capabilities
+  // support the GetDIBits and SetDIBits functions.
+  //
+
+  if ((GetDeviceCaps(memoryDC_, RASTERCAPS) & RC_DI_BITMAP) == 0)
+  {
+    logTest("Poller::init", "This memory device is not supporting the GetDIBits and SetDIBits "
+               "function.");
+
+    logError("Poller::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  if (GetDeviceCaps(screenDC_, PLANES) != 1)
+  {
+    logTest("Poller::init", "This video device has more than 1 color plane.");
+
+    logError("Poller::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  return CorePoller::init();
+}
+
+//
+// FIXME: Remove me.
+//
+
+void ErrorExit(LPTSTR lpszFunction)
+{
+    LPVOID lpMsgBuf;
+    DWORD dw = GetLastError();
+
+    FormatMessage(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER |
+        FORMAT_MESSAGE_FROM_SYSTEM,
+        NULL,
+        dw,
+        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        (LPTSTR) &lpMsgBuf,
+        0, NULL );
+
+    logTest(lpszFunction, " Failed with error [%ld]: %s", dw, (char*)lpMsgBuf);
+
+    LocalFree(lpMsgBuf);
+    ExitProcess(dw);
+}
+
+//
+// FIXME: End.
+//
+
+char *Poller::getRect(XRectangle r)
+{
+  logTrace("Poller::getRect");
+
+  logDebug("Poller::getRect", "Going to retrive rectangle [%d, %d, %d, %d].",
+              r.x, r.y, r.width, r.height);
+
+  //
+  // The CAPTUREBLT operation could be a very
+  // cpu-consuming task. We should make some
+  // test to see how much it is expensive.
+  // Anyway we get tooltip windows and any
+  // other special effect not included with
+  // only the SRCCOPY operation.
+  //
+
+  if (BitBlt(memoryDC_, r.x, r.y, r.width, r.height,
+                 screenDC_, r.x, r.y, SRCCOPY | CAPTUREBLT) == 0)
+  {
+    logError("Poller::getRect", ESET(ENOMSG));
+
+    logTest("Poller::getRect", "Failed to perform a bit-block transfer.");
+    logTest("Poller::getRect", "bit-block error=%lu", GetLastError());
+
+    return NULL;
+  }
+
+  // bmi_.bmiHeader.biWidth = r.width;
+  // bmi_.bmiHeader.biHeight = -r.height;
+
+  if (pDIBbits_ == NULL)
+  {
+    static long nPixel = 0;
+
+    if (nPixel < r.width * r.height)
+    {
+
+      if (DIBBuffer_)
+      {
+        delete [] DIBBuffer_;
+      }
+
+      nPixel = r.width * r.height;
+
+      DIBBuffer_ = new char [nPixel * bpp_];
+
+      if (DIBBuffer_ == NULL)
+      {
+        logError("Poller::getRect", ESET(ENOMEM));
+
+        nPixel = 0;
+
+        return NULL;
+      }
+    }
+
+    if (GetDIBits(memoryDC_, screenBmp_, height_ - r.height - r.y, r.height,
+                      DIBBuffer_, &bmi_, DIB_RGB_COLORS) == 0)
+    {
+      logError("Poller::getRect", ESET(ENOMSG));
+
+      logTest("Poller::getRect", "Failed to retrieve the screen bitmap.");
+
+      return NULL;
+    }
+
+    return DIBBuffer_;
+  }
+  else
+  {
+    return (char *) pDIBbits_ + r.y * bpl_ + r.x * bpp_;
+  }
+}
+
+void Poller::handleKeyboardEvent(Display *display, XEvent *event)
+{
+  KeySym keysym;
+  char *keyname = new char [31];
+  keyTranslation tr = {0, 0};
+  unsigned char scancode = 0;
+  int lengthArrayINPUT = 0;
+
+  if (XLookupString((XKeyEvent *) event, keyname, 30, &keysym, NULL) > 0)
+  {
+    logTest("Poller::handleKeyboardEvent", "keyname %s, keysym [%x]", keyname, (unsigned int)keysym);
+  }
+
+  if (specialKeys(keysym, event -> xkey.state, event -> type) == 1)
+  {
+    delete[] keyname;
+    return;
+  }
+
+  tr = xkeymapTranslateKey(keysym, event -> xkey.keycode, event -> xkey.state);
+  scancode = tr.scancode;
+
+  logTest("Poller::handleKeyboardEvent", "keyname [%s] scancode [0x%x], keycode[0x%x], keysym [%x]", keyname,
+              tr.scancode, event ->xkey.keycode, (unsigned int)keysym);
+
+  if (scancode == 0)
+  {
+    delete[] keyname;
+    return;
+  }
+
+  if (event -> type == KeyPress)
+  {
+    int test1 = MapVirtualKey(scancode, MAPVK_VSC_TO_VK_EX);
+    int test2 = MapVirtualKey(0x24, MAPVK_VSC_TO_VK_EX);
+
+    if (test1 == test2)
+    {
+      simulateCtrlAltDel();
+    }
+
+    if (isModifier(scancode) == 0)
+    {
+      savedServerModifierState_ = serverModifierState_;
+    }
+
+    ensureServerModifiers(tr, &lengthArrayINPUT);
+    if (sendInput(scancode, 1, &lengthArrayINPUT) == 0)
+    {
+      logTest("Poller::handleKeyboardEvent", "lengthArrayINPUT [%d].", lengthArrayINPUT);
+    }
+    restoreServerModifiers(scancode);
+  }
+  else if (event -> type == KeyRelease)
+  {
+    if (sendInput(scancode, 0, &lengthArrayINPUT) == 0)
+    {
+      logTest("Poller::handleKeyboardEvent", "lengthArrayINPUT [%d].", lengthArrayINPUT);
+    }
+  }
+
+  updateModifierState(scancode, (event -> type == KeyPress));
+
+  delete[] keyname;
+}
+
+void Poller::handleMouseEvent(Display *display, XEvent *event)
+{
+  DWORD flg = 0;
+  DWORD whl = 0;
+
+  if (event -> type == ButtonPress)
+  {
+    logTest("Poller::handleMouseEvent", "ButtonPress.\n");
+    switch (event -> xbutton.button)
+    {
+      case Button1:
+      {
+        flg = MOUSEEVENTF_LEFTDOWN;
+        break;
+      }
+      case Button2:
+      {
+        flg = MOUSEEVENTF_MIDDLEDOWN;
+        break;
+      }
+      case Button3:
+      {
+        flg = MOUSEEVENTF_RIGHTDOWN;
+        break;
+      }
+      case Button4:
+      {
+        flg = MOUSEEVENTF_WHEEL;
+        whl = WHEEL_DELTA;
+        pMouse_ -> mi.mouseData = whl;
+        break;
+      }
+      case Button5:
+      {
+        flg = MOUSEEVENTF_WHEEL;
+        whl = (DWORD) (-WHEEL_DELTA);
+        pMouse_ -> mi.mouseData = whl;
+        break;
+      }
+    }
+  }
+  else if (event -> type == ButtonRelease)
+  {
+    switch (event -> xbutton.button)
+    {
+      case Button1:
+      {
+        flg = MOUSEEVENTF_LEFTUP;
+        break;
+      }
+      case Button2:
+      {
+        flg = MOUSEEVENTF_MIDDLEUP;
+        break;
+      }
+      case Button3:
+      {
+        flg = MOUSEEVENTF_RIGHTUP;
+        break;
+      }
+      case Button4:
+      {
+        flg = MOUSEEVENTF_WHEEL;
+        whl = 0;
+        pMouse_ -> mi.mouseData = whl;
+        break;
+      }
+      case Button5:
+      {
+        flg = MOUSEEVENTF_WHEEL;
+        whl = 0;
+        pMouse_ -> mi.mouseData = whl;
+        break;
+      }
+    }
+  }
+  else if (event -> type == MotionNotify)
+  {
+    logTest("Poller::handleMouseEvent", "SetCursor - MotionNotify");
+
+    SetCursorPos(event -> xmotion.x, event -> xmotion.y);
+  }
+
+  if (flg > 0)
+  {
+  //  logTest("Poller::handleMouseEvent", "SetCursor - flg > 0");
+    //
+    // FIXME: move the cursor to the pace the event occurred
+    //
+
+    SetCursorPos(event -> xbutton.x, event -> xbutton.y);
+
+    //
+    // FIXME: Remove me: send the click/release event
+    // mouse_event(flg, 0, 0, whl, (ULONG_PTR)NULL);
+    //
+
+    pMouse_ -> mi.dwFlags = flg;
+
+    if (SendInput(1, pMouse_, sizeof(INPUT)) == 0)
+    {
+      logTest("Poller::handleMouseEvent", "Failed SendInput");
+    }
+  }
+}
+
+int Poller::updateCursor(Window wnd, Visual* vis)
+{
+  BYTE *mBits, *andBits, *xorBits;
+
+  logTrace("Poller::Cursor");
+
+  //
+  // Retrieve mouse cursor handle.
+  //
+
+  CURSORINFO cursorInfo;
+  cursorInfo.cbSize = sizeof(CURSORINFO);
+
+  if (GetCursorInfo(&cursorInfo) == 0)
+  {
+    logTest("Poller::Cursor", "GetCursorInfo() failed [%u].\n", (unsigned int)GetLastError());
+    LocalFree(&cursorInfo);
+    return -1;
+  }
+
+  HCURSOR hCursor = cursorInfo.hCursor;
+
+  if (hCursor == 0)
+  {
+    logTest("Poller::Cursor","Cursor Handle is NULL. Error[%u].\n", (unsigned int)GetLastError());
+    return 1;
+  }
+
+  if (hCursor == oldCursor_)
+  {
+    LocalFree(&cursorInfo);
+    return 1;
+  }
+  else
+  {
+    oldCursor_ = hCursor;
+  }
+
+  //
+  // Get cursor info.
+  //
+
+  //  logTest("Poller::Cursor","hCursor [%xH] GetCursor [%xH].\n", hCursor, GetCursor());
+
+  ICONINFO iconInfo;
+  if (GetIconInfo(hCursor, &iconInfo) == 0)
+  {
+    logTest("Poller::Cursor","GetIconInfo() failed. Error[%d].", (unsigned int)GetLastError());
+    LocalFree(&iconInfo);
+    //    return -1;
+  }
+
+  BOOL isColorCursor = FALSE;
+  if (iconInfo.hbmColor != NULL)
+  {
+    isColorCursor = TRUE;
+  }
+
+  if (iconInfo.hbmMask == NULL)
+  {
+    logTest("Poller::Cursor","Cursor bitmap handle is NULL.\n");
+    return -1;
+  }
+
+  //
+  // Check bitmap info for the cursor
+  //
+
+  BITMAP bmMask;
+  if (!GetObject(iconInfo.hbmMask, sizeof(BITMAP), (LPVOID)&bmMask))
+  {
+    logTest("Poller::Cursor","GetObject() for bitmap failed.\n");
+    DeleteObject(iconInfo.hbmMask);
+    LocalFree(&bmMask);
+    return -1;
+  }
+
+  if (bmMask.bmPlanes != 1 || bmMask.bmBitsPixel != 1)
+  {
+    logTest("Poller::Cursor","Incorrect data in cursor bitmap.\n");
+    LocalFree(&bmMask);
+    DeleteObject(iconInfo.hbmMask);
+    return -1;
+  }
+
+  // Get monochrome bitmap data for cursor
+  // NOTE: they say we should use GetDIBits() instead of GetBitmapBits().
+  mBits = new BYTE[bmMask.bmWidthBytes * bmMask.bmHeight];
+
+  if (mBits == NULL)//Data bitmap
+  {
+    DeleteObject(iconInfo.hbmMask);
+    DestroyCursor(cursorInfo.hCursor);
+    LocalFree(&iconInfo);
+    LocalFree(&bmMask);
+    delete[] mBits;
+    return -1;
+  }
+
+  BOOL success = GetBitmapBits(iconInfo.hbmMask, bmMask.bmWidthBytes * bmMask.bmHeight, mBits);
+
+  if (!success)
+  {
+    logTest("Poller::Cursor","GetBitmapBits() failed.\n");
+    delete[] mBits;
+    return -1;
+  }
+
+  andBits = mBits;
+
+  long width = bmMask.bmWidth;
+  long height = (isColorCursor) ? bmMask.bmHeight : bmMask.bmHeight/2;
+
+  //
+  // The bitmask is formatted so that the upper half is
+  // the icon AND bitmask and the lower half is the icon XOR bitmask.
+  //
+
+  if (!isColorCursor)
+  {
+    xorBits = andBits + bmMask.bmWidthBytes * height;
+
+/*    logTest("Poller::Cursor","no color widthB[%ld] width[%ld] height[%ld] totByte[%ld] mbits[%ld].\n",
+                 bmMask.bmWidthBytes,width,height,success,bmMask.bmHeight * bmMask.bmWidthBytes);*/
+
+    if (xCursor_ > 0)
+    {
+      XFreeCursor(display_, xCursor_);
+    }
+
+    xCursor_ = createCursor(wnd, vis, (unsigned int)iconInfo.xHotspot, (unsigned int)iconInfo.yHotspot,
+                    width, height, (unsigned char *)xorBits, (unsigned char *)andBits);
+
+    XDefineCursor(display_, wnd, xCursor_);
+  }
+
+  delete []mBits;
+  DeleteObject(iconInfo.hbmMask);
+  LocalFree(&bmMask);
+  DestroyCursor(cursorInfo.hCursor);
+  LocalFree(&iconInfo);
+
+  return success;
+}
+
+unsigned char Poller::specialKeys(unsigned int keysym, unsigned int state, int pressed)
+{
+  return 0;
+}
+
+void Poller::ensureServerModifiers(keyTranslation tr, int *lengthArrayINPUT)
+{
+  return;
+}
+
+void Poller::restoreServerModifiers(UINT scancode)
+{
+  keyTranslation dummy;
+  int lengthArrayINPUT = 0;
+
+  if (isModifier(scancode) == 1)
+  {
+    return;
+  }
+
+  dummy.scancode = 0;
+  dummy.modifiers = savedServerModifierState_;
+  ensureServerModifiers(dummy, &lengthArrayINPUT);
+  if (sendInput(0, 0, &lengthArrayINPUT) == 0)
+  {
+    logTest("Poller::restoreServerModifiers", "lengthArrayINPUT [%d]", lengthArrayINPUT);
+  }
+}
+
+int Poller::updateShadowFrameBuffer(void)
+{
+  return 1;
+}
+
+void Poller::addToKeymap(char *keyname, unsigned char scancode, unsigned short modifiers, char *mapname)
+{
+  return;
+}
+
+FILE *Poller::xkeymapOpen(char *filename)
+{
+  return NULL;
+}
+
+int Poller::xkeymapRead(char *mapname)
+{
+  return 1;
+}
+
+void Poller::xkeymapInit(char *keyMapName)
+{
+  return;
+}
+
+keyTranslation Poller::xkeymapTranslateKey(unsigned int keysym, unsigned int keycode,
+                                               unsigned int state)
+{
+  keyTranslation tr = { 0, 0 };
+
+  return tr;
+}
+
+unsigned char Poller::getKeyState(unsigned int state, unsigned int keysym)
+{
+  return 0;
+}
+
+char *Poller::getKsname(unsigned int keysym)
+{
+        char *ksname = NULL;
+
+        return ksname;
+}
+
+//
+// Routine used to fool Winlogon into thinking CtrlAltDel was pressed
+//
+char Poller::simulateCtrlAltDel(void)
+{
+  HDESK oldDesktop = GetThreadDesktop(GetCurrentThreadId());
+
+  //
+  // Switch into the Winlogon desktop.
+  //
+  if (selectDesktopByName("Winlogon") == 0)
+  {
+    logTest("SimulateCtrlAltDelThreadFn","Failed to select logon desktop.");
+    return 0;
+  }
+
+  logTest("SimulateCtrlAltDelThreadFn","Generating ctrl-alt-del.");
+
+  //
+  // Winlogon uses hotkeys to trap Ctrl-Alt-Del.
+  //
+  PostMessage(HWND_BROADCAST, WM_HOTKEY, 0, MAKELONG(MOD_ALT | MOD_CONTROL, VK_DELETE));
+
+  //
+  // Switch back to our original desktop.
+  //
+  if (oldDesktop != NULL)
+  {
+    selectDesktop(oldDesktop);
+  }
+
+  return 1;
+}
+
+// Switches the current thread into a different desktop by desktop handle
+// This call takes care of all the evil memory management involved
+char Poller::selectDesktop(HDESK newDesktop)
+{
+  //
+  // Only on NT.
+  //
+  if (isWinNT())
+  {
+    HDESK oldDesktop = GetThreadDesktop(GetCurrentThreadId());
+
+    DWORD dummy;
+    char newName[256];
+
+    if (GetUserObjectInformation(newDesktop, UOI_NAME, &newName, 256, &dummy) == 0)
+    {
+      logDebug("Poller::selectDesktop","GetUserObjectInformation() failed. Error[%lu].", GetLastError());
+      return 0;
+    }
+
+    logTest("Poller::selectDesktop","New Desktop to [%s] (%x) from (%x).",
+                 newName, (unsigned int)newDesktop, (unsigned int)oldDesktop);
+
+    //
+    // Switch the desktop.
+    //
+    if(SetThreadDesktop(newDesktop) == 0)
+    {
+      logDebug("Poller::SelectDesktop","Unable to SetThreadDesktop(), Error=%lu.", GetLastError());
+      return 0;
+    }
+
+    //
+    // Switched successfully - destroy the old desktop.
+    //
+    if (CloseDesktop(oldDesktop) == 0)
+    {
+      logDebug("Poller::selectHdesk","Failed to close old desktop (%x), Error=%lu.",
+                   (unsigned int)oldDesktop, GetLastError());
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+//
+// Switches the current thread into a different desktop, by name
+// Calling with a valid desktop name will place the thread in that desktop.
+// Calling with a NULL name will place the thread in the current input desktop.
+//
+
+char Poller::selectDesktopByName(char *name)
+{
+  //
+  // Only on NT.
+  //
+  if (isWinNT())
+  {
+    HDESK desktop;
+
+    if (name != NULL)
+    {
+      //
+      // Attempt to open the named desktop.
+      //
+      desktop = OpenDesktop(name, 0, FALSE,
+                                DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |
+                                DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL |
+                                DESKTOP_WRITEOBJECTS | DESKTOP_READOBJECTS |
+                                DESKTOP_SWITCHDESKTOP | GENERIC_WRITE);
+    }
+    else
+    {
+      //
+      // Open the input desktop.
+      //
+      desktop = OpenInputDesktop(0, FALSE,
+                                     DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |
+                                     DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL |
+                                     DESKTOP_WRITEOBJECTS | DESKTOP_READOBJECTS |
+                                     DESKTOP_SWITCHDESKTOP | GENERIC_WRITE);
+    }
+
+    if (desktop == NULL)
+    {
+      logDebug("Poller::selectDesktopByName","Unable to open desktop, Error=%lu.", GetLastError());
+      return 0;
+    }
+
+    //
+    // Switch to the new desktop
+    //
+    if (selectDesktop(desktop) == 0)
+    {
+      //
+      // Failed to enter the new desktop, so free it!
+      //
+      logDebug("Poller::selectDesktopByName","Failed to select desktop.");
+
+      if (CloseDesktop(desktop) == 0)
+      {
+        logDebug("Poller::selectDesktopByName","Failed to close desktop, Error=%lu.", GetLastError());
+        return 0;
+      }
+    }
+
+    return 1;
+  }
+
+  return (name == NULL);
+}
+
+void Poller::platformOS()
+{
+    OSVERSIONINFO osversioninfo;
+    osversioninfo.dwOSVersionInfoSize = sizeof(osversioninfo);
+
+    //
+    // Get the current OS version.
+    //
+    if (GetVersionEx(&osversioninfo) == 0)
+    {
+      platformID_ = 0;
+    }
+    platformID_ = osversioninfo.dwPlatformId;
+
+//
+//    versionMajor = osversioninfo.dwMajorVersion;
+//    versionMinor = osversioninfo.dwMinorVersion;
+//
+}
+
+char Poller::checkDesktop()
+{
+  //
+  // Only on NT.
+  //
+  if (isWinNT())
+  {
+    //
+    // Get the input and thread desktops.
+    //
+    HDESK desktop = GetThreadDesktop(GetCurrentThreadId());
+    HDESK inputDesktop = OpenInputDesktop(0, FALSE,
+                        DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |
+                        DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL |
+                        DESKTOP_WRITEOBJECTS | DESKTOP_READOBJECTS |
+                        DESKTOP_SWITCHDESKTOP | GENERIC_WRITE);
+
+    if (inputDesktop == NULL)
+    {
+      return 0;
+    }
+
+    DWORD dummy;
+    char desktopName[256];
+    char inputName[256];
+
+    if (GetUserObjectInformation(desktop, UOI_NAME, &desktopName, 256, &dummy) == 0)
+    {
+      if (CloseDesktop(inputDesktop) == 0)
+      {
+        logDebug("Poller::checkDesktop", "Failed to close desktop, Error[%d].", (unsigned int)GetLastError());
+        return 0;
+      }
+    }
+
+    if (GetUserObjectInformation(inputDesktop, UOI_NAME, &inputName, 256, &dummy) == 0)
+    {
+      if (CloseDesktop(inputDesktop) == 0)
+      {
+        logDebug("Poller::checkDesktop", "Failed to close input desktop, Error[%d].", (unsigned int)GetLastError());
+        return 0;
+      }
+    }
+
+    if (strcmp(desktopName, inputName) != 0)
+    {
+      //
+      // Switch to new desktop.
+      //
+      selectDesktop(inputDesktop);
+    }
+
+    if (CloseDesktop(desktop) == 0)
+    {
+      logDebug("Poller::checkDesktop", "Failed to close input desktop, Error[%d].", (unsigned int)GetLastError());
+      return 0;
+    }
+
+    if (CloseDesktop(inputDesktop) == 0)
+    {
+      logDebug("Poller::checkDesktop", "Failed to close input desktop, Error[%d].", (unsigned int)GetLastError());
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+unsigned char Poller::isModifier(UINT scancode)
+{
+  return 0;
+}
+
+void Poller::updateModifierState(UINT scancode, unsigned char pressed)
+{
+  return;
+}
+
+Cursor Poller::createCursor(Window wnd, Visual *vis,unsigned int x, unsigned int y,
+                                int width, int height, unsigned char *xormask, unsigned char *andmask)
+{
+  Pixmap maskglyph, cursorglyph;
+  XColor bg, fg;
+  Cursor xcursor;
+  unsigned char *cursor;
+  unsigned char *mask, *pmask, *pcursor, tmp;
+  int scanline, offset;
+
+  scanline = (width + 7) / 8;
+  offset = scanline * height;
+
+  pmask = andmask;
+  pcursor = xormask;
+  for (int i = 0; i < offset; i++)
+  {
+    //
+    // The pixel is black if both the bit of andmask and xormask is one.
+    //
+
+    tmp = *pcursor & *pmask;
+    *pcursor ^= tmp;
+    *pmask ^= tmp;
+
+    *pmask = ~(*pmask);
+
+    pmask++;
+    pcursor++;
+  }
+
+  cursor = new unsigned char[offset];
+  memcpy(cursor, xormask, offset);
+
+  mask = new unsigned char[offset];
+  memcpy(mask, andmask, offset);
+
+  fg.red = fg.blue = fg.green = 0xffff;
+  bg.red = bg.blue = bg.green = 0x0000;
+  fg.flags = bg.flags = DoRed | DoBlue | DoGreen;
+
+  cursorglyph = createGlyph(wnd, vis, width, height, cursor);
+  maskglyph = createGlyph(wnd, vis, width, height, mask);
+
+  xcursor = XCreatePixmapCursor(display_, cursorglyph, maskglyph, &fg, &bg, x, y);
+
+  XFreePixmap(display_, maskglyph);
+  XFreePixmap(display_, cursorglyph);
+  delete[]mask;
+  delete[]cursor;
+
+  return xcursor;
+}
+
+Pixmap Poller::createGlyph(Window wnd, Visual *visual, int width, int height, unsigned char *data)
+{
+  XImage *image;
+  Pixmap bitmap;
+  int scanline;
+  GC glyphGC;
+
+  scanline = (width + 7) / 8;
+
+  bitmap = XCreatePixmap(display_, wnd, width, height, 1);
+  glyphGC = XCreateGC(display_, bitmap, 0, NULL);
+
+  image = XCreateImage(display_, visual, 1, ZPixmap, 0, (char *)data, width, height, 8, scanline);
+  image->byte_order = 1; // MSBFirst -- LSBFirst = 0
+  image->bitmap_bit_order = 1;
+  XInitImage(image);
+
+/*  logTest("Poller::createGlyph","XPutImage on pixmap %d,%d,%d,%d.\n",
+              0, 0, width, height);*/
+  XPutImage(display_, bitmap, glyphGC, image, 0, 0, 0, 0, width, height);
+  XFree(image);
+
+  return bitmap;
+}
+#endif /* defined(__CYGWIN32__) || defined(WIN32) */