New upstream version 3.5.99.27

nxcompshad/.gitignore

@@ -0,0 +1,21 @@
+Makefile
+Makefile.in
+aclocal.m4
+build-aux/compile
+build-aux/config.guess
+build-aux/config.sub
+build-aux/depcomp
+build-aux/install-sh
+build-aux/ltmain.sh
+build-aux/missing
+config.h
+config.h.in
+libtool
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
+nxcompshad.pc
+src/Makefile
+src/Makefile.in

nxcompshad/Makefile.am

@@ -0,0 +1,23 @@
+SUBDIRS = src
+
+pkgconfig_DATA = nxcompshad.pc
+
+ACLOCAL_AMFLAGS = -I m4
+
+MAINTAINERCLEANFILES =			\
+    $(srcdir)/autom4te.cache/*		\
+    $(srcdir)/build-aux/*		\
+    $(srcdir)/Makefile.in		\
+    $(srcdir)/src/Makefile.in		\
+    $(srcdir)/aclocal.m4		\
+    $(srcdir)/config.h.in		\
+    $(srcdir)/config.h.in~		\
+    $(srcdir)/configure			\
+    $(srcdir)/m4/libtool.m4		\
+    $(srcdir)/m4/lt~obsolete.m4		\
+    $(srcdir)/m4/ltoptions.m4		\
+    $(srcdir)/m4/ltsugar.m4		\
+    $(srcdir)/m4/ltversion.m4		\
+    $(NULL)
+
+DISTCLEANFILES=$(MAINTAINERCLEANFILES)

nxcompshad/VERSION

@@ -0,0 +1 @@
+../VERSION

nxcompshad/configure.ac

@@ -0,0 +1,71 @@
+dnl ***************************************************************************
+dnl *** configure.ac for nxcompshad                                         ***
+dnl ***************************************************************************
+
+m4_define([nxcompshad_version], m4_esyscmd([tr -d '\n' < VERSION]))
+
+# Initialize Autoconf
+AC_PREREQ(2.60)
+
+AC_INIT([libXcompshad], [nxcompshad_version], [https://github.com/ArcticaProject/nx-libs/issues])
+AC_PROG_CXX
+AC_CONFIG_SRCDIR([Makefile.am])
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_AUX_DIR([build-aux])
+
+AM_INIT_AUTOMAKE([foreign no-dist-gzip dist-bzip2])
+
+# Initialize libtool
+AC_PROG_LIBTOOL
+
+# enable this to add the variable to the Makefiles
+#AC_ARG_VAR(NX_VERSION_CUSTOM, [custom version string])
+
+if test "x$NX_VERSION_CUSTOM" != x; then
+    AC_DEFINE_UNQUOTED([NX_VERSION_CUSTOM], ["${NX_VERSION_CUSTOM}"], [user provided custom version string])
+fi
+
+COMPSHAD_VERSION=nxcompshad_version
+AC_SUBST([COMPSHAD_VERSION])
+
+LT_COMPSHAD_VERSION=["$(printf '%s\n' "${COMPSHAD_VERSION}" | awk -F '.' '/^[0-9]+\.[0-9]+\.[0-9]+.*$/ { print $1 ":" $2 ":" $3; }')"]
+AC_SUBST([LT_COMPSHAD_VERSION])
+
+# Silence warning: ar: 'u' modifier ignored since 'D' is the default
+AC_SUBST(AR_FLAGS, [cr])
+
+PKG_CHECK_MODULES(Xext, xext)
+PKG_CHECK_MODULES(Xdamage, xdamage)
+PKG_CHECK_MODULES(Xrandr, xrandr)
+PKG_CHECK_MODULES(Xtst, xtst)
+
+# Upstream's pkg.m4 (since 0.27) offers this now, but define our own
+# compatible version in case the local version of pkgconfig isn't new enough.
+# https://bugs.freedesktop.org/show_bug.cgi?id=48743
+m4_ifdef([PKG_INSTALLDIR], [PKG_INSTALLDIR],
+         [AC_ARG_WITH([pkgconfigdir],
+                      [AS_HELP_STRING([--with-pkgconfigdir],
+                      [install directory for nxcompshad.pc pkg-config file])],
+                       [],[with_pkgconfigdir='$(libdir)/pkgconfig'])
+          AC_SUBST([pkgconfigdir], [${with_pkgconfigdir}])])
+
+AC_LANG([C++])
+NX_COMPILER_BRAND
+NX_DEFAULT_OPTIONS
+
+NX_TARGET_USE_ELF
+
+AC_ARG_ENABLE([cxx11],
+              [AS_HELP_STRING([--enable-cxx11],
+                              [enable optional features requiring C++11 support (disabled by default)])],
+              [AS_IF([test x$enableval = xyes],
+                     [AX_CXX_COMPILE_STDCXX_11([], [mandatory])])])
+
+AC_CONFIG_FILES([
+Makefile
+src/Makefile
+nxcompshad.pc
+])
+
+AC_OUTPUT

nxcompshad/include/Shadow.h

@@ -0,0 +1,111 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Shadow_H
+#define Shadow_H
+
+#include <nx-X11/Xlib.h>
+
+#define NXShadowCorrectColor(length, buffer) \
+\
+{ \
+  unsigned short a; \
+  unsigned short b; \
+  unsigned short *shorts; \
+  int i; \
+\
+  length >>= 1; \
+  shorts = (unsigned short *)buffer; \
+  for (i = 0; i < length ; i++) \
+  { \
+    a = shorts[i]; \
+\
+    b = a & 63; \
+    a <<= 1; \
+    a = (a & ~127) | b; \
+\
+    shorts[i] = a; \
+  } \
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef char* UpdaterHandle;
+
+typedef struct _ShadowOptions
+{
+  char  optionShmExtension;
+  char  optionDamageExtension;
+  int   optionShadowDisplayUid;
+} ShadowOptions;
+
+extern ShadowOptions NXShadowOptions;
+
+extern void NXShadowResetOptions();
+
+extern int           NXShadowCreate(void *, char *, char *, void **);
+extern void          NXShadowDestroy(void);
+
+/*
+ * Use an already opened Display connection.
+ * We use <void *> instead of <Display *> to avoid
+ * useless dependences from Xlib headers.
+ */
+
+extern int NXShadowAddUpdaterDisplay(void *display, int *width, int *height,
+                                         unsigned char *depth);
+extern UpdaterHandle NXShadowAddUpdater(char *displayName);
+extern int           NXShadowRemoveUpdater(UpdaterHandle handle);
+extern int           NXShadowRemoveAllUpdaters(void);
+
+extern void          NXShadowHandleInput(void);
+extern int           NXShadowHasChanged(int (*)(void *), void *, int *);
+extern void          NXShadowExportChanges(long *, char **);
+extern int           NXShadowHasUpdaters(void);
+extern int           NXShadowCaptureCursor(unsigned int wnd, void *vis);
+extern void          NXShadowColorCorrect(int, int, unsigned int, unsigned int, char *);
+extern void          NXShadowUpdateBuffer(void **);
+
+extern void          NXShadowEvent(Display *, XEvent);
+extern void          NXShadowWebKeyEvent(KeySym keysym, Bool isKeyPress);
+
+extern void          NXShadowSetDisplayUid(int uid);
+
+extern void          NXShadowDisableShm(void);
+extern void          NXShadowDisableDamage(void);
+
+extern void          NXShadowGetScreenSize(int *width, int *height);
+extern void          NXShadowSetScreenSize(int *width, int *height);
+
+extern void          NXShadowInitKeymap(void *keysyms);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Shadow_H */
+

nxcompshad/m4/ax_cxx_compile_stdcxx.m4

@@ -0,0 +1 @@
+../../m4/ax_cxx_compile_stdcxx.m4

nxcompshad/m4/ax_cxx_compile_stdcxx_11.m4

@@ -0,0 +1 @@
+../../m4/ax_cxx_compile_stdcxx_11.m4

nxcompshad/m4/nx-macros.m4

@@ -0,0 +1 @@
+../../m4/nx-macros.m4

nxcompshad/nxcompshad.pc.in

@@ -0,0 +1,13 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: nxcompshad
+Description: Shadow Session Support for NX Compression Library
+Version: @COMPSHAD_VERSION@
+Requires: nxcomp
+Requires.private: x11
+Cflags: -I${includedir}
+Libs: -L${libdir} -lXcompshad
+

nxcompshad/src/Core.cpp

@@ -0,0 +1,626 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+#include <sys/time.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include "Core.h"
+#include "Logger.h"
+
+const int CorePoller::maxSliceHeight_ = 20;
+const int CorePoller::minSliceHeight_ = 3;
+
+const char CorePoller::interlace_[] =
+{
+  0, 16,
+  8, 24,
+  4, 20, 12, 28,
+  2, 18, 10, 26, 6, 22, 14, 30,
+  1, 17,
+  9, 25,
+  5, 21, 13, 29,
+  3, 19, 11, 27, 7, 23, 15, 31
+};
+
+CorePoller::CorePoller(Input *input, Display *display) : input_(input)
+{
+  logTrace("CorePoller::CorePoller");
+
+  buffer_ = NULL;
+  lastUpdatedRegion_ = NULL;
+  lineStatus_ = NULL;
+  linePriority_ = NULL;
+  lefts_ = NULL;
+  rights_ = NULL;
+}
+
+CorePoller::~CorePoller()
+{
+  logTrace("CorePoller::~CorePoller");
+
+  if (buffer_ != NULL)
+  {
+    delete [] buffer_;
+
+    buffer_ = NULL;
+  }
+
+  if (lastUpdatedRegion_ != NULL)
+  {
+    XDestroyRegion(lastUpdatedRegion_);
+
+    lastUpdatedRegion_ = NULL;
+  }
+
+  if (lineStatus_ != NULL)
+  {
+    delete [] lineStatus_;
+
+    lineStatus_ = NULL;
+  }
+
+  if (linePriority_ != NULL)
+  {
+    delete [] linePriority_;
+
+    linePriority_ = NULL;
+  }
+
+  if (lefts_ != NULL)
+  {
+    delete [] lefts_;
+
+    lefts_ = NULL;
+  }
+
+  if (rights_ != NULL)
+  {
+    delete [] rights_;
+
+    rights_ = NULL;
+  }
+}
+
+int CorePoller::init()
+{
+  logTrace("CorePoller::init");
+
+  createFrameBuffer();
+
+  if (buffer_ == NULL)
+  {
+    logError("CorePoller::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  logTest("CorePoller::init", "Allocated frame buffer at [%p] for [%d] bytes.",
+            buffer_, bpl_ * height_);
+
+  if (lastUpdatedRegion_ != NULL)
+  {
+    XDestroyRegion(lastUpdatedRegion_);
+
+    lastUpdatedRegion_ = NULL;
+  }
+
+  lastUpdatedRegion_ = XCreateRegion();
+
+  if (lineStatus_ != NULL)
+  {
+    delete[] lineStatus_;
+  }
+
+  lineStatus_ = new LineStatus[height_ + 1];
+
+  if (lineStatus_ == NULL)
+  {
+    logError("CorePoller::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  //
+  // We need this boundary element to
+  // speed up the algo.
+  //
+
+  if (linePriority_ != NULL)
+  {
+    delete[] linePriority_;
+  }
+
+  linePriority_ = new int [height_ + 1];
+
+  if (linePriority_ == NULL)
+  {
+    logError("CorePoller::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  for (unsigned int i = 0; i < height_; i++)
+  {
+    linePriority_[i] = HIGHEST_PRIORITY;
+  }
+
+  if (lefts_ != NULL)
+  {
+    delete[] lefts_;
+  }
+
+  lefts_ = new int [height_];
+
+  if (rights_ != NULL)
+  {
+    delete[] rights_;
+  }
+
+  rights_ = new int [height_];
+
+  for (unsigned int i = 0; i < height_; i++)
+  {
+    rights_[i] = lefts_[i] = 0;
+  }
+
+  return 1;
+}
+
+int CorePoller::isChanged(int (*checkIfInputCallback)(void *), void *arg, int *suspended)
+{
+  logTrace("CorePoller::isChanged");
+
+  if (mirror_ == 1)
+  {
+    int result = mirrorChanges_;
+
+    mirrorChanges_ = 0;
+
+    return result;
+  }
+
+  logDebug("CorePoller:isChanged", "Going to use default polling algorithm.\n");
+
+  //
+  // In order to allow this function to
+  // be suspended and resumed later, we
+  // need to save these two status vars.
+  //
+
+  static int idxIlace = 0;
+  static int curLine = 0;
+
+
+  const long timeout = 50;
+  long oldTime;
+  long newTime;
+  struct timeval ts;
+
+  gettimeofday(&ts, NULL);
+
+  oldTime = ts.tv_sec * 1000 + ts.tv_usec / 1000;
+
+  if (curLine == 0) // && idxIlace == 0 ?
+  {
+    for (unsigned int i = 0; i < height_; i++)
+    {
+      lineStatus_[i] = LINE_NOT_CHECKED;
+    }
+  }
+
+  int foundChanges = 0;
+
+  foundChanges = 0;
+
+  int curIlace = interlace_[idxIlace];
+
+  bool moveBackward = false;
+
+  logDebug("CorePoller::isChanged", "Interlace index [%d] interlace [%d].", idxIlace, curIlace);
+
+  for (; curLine < (int) height_; curLine++)
+  {
+    logDebug("CorePoller::isChanged", "Analyzing line [%d] move backward [%d] status [%d] priority [%d].",
+                curLine, moveBackward, lineStatus_[curIlace], linePriority_[curLine]);
+
+    //
+    // Ask the caller if the polling have to be suspended.
+    //
+
+    if ((*checkIfInputCallback)(arg) == 1)
+    {
+      *suspended = 1;
+
+      break;
+    }
+
+    //
+    // Suspend if too much time is elapsed.
+    //
+
+    gettimeofday(&ts, NULL);
+
+    newTime = ts.tv_sec * 1000 + ts.tv_usec / 1000;
+
+    if (newTime - oldTime >= timeout)
+    {
+      *suspended = 1;
+
+      break;
+    }
+
+    oldTime = newTime;
+
+    if (lineStatus_[curLine] != LINE_NOT_CHECKED)
+    {
+      continue;
+    }
+
+    if (moveBackward)
+    {
+      moveBackward = false;
+    }
+    else
+    {
+      switch (linePriority_[curLine])
+      {
+        case 1:
+        case 29:
+        {
+          //
+          // It was a priority,
+          // but now it may not be.
+          //
+        }
+        case 31:
+        {
+          //
+          // Not a priority, still isn't.
+          //
+
+          linePriority_[curLine] = NOT_PRIORITY;
+
+          break;
+        }
+        case 0:
+        {
+          //
+          // Make it a priority.
+          //
+
+          linePriority_[curLine] = PRIORITY;
+
+          break;
+        }
+        default:
+        {
+          linePriority_[curLine]--;
+
+          break;
+        }
+      }
+
+      if ((linePriority_[curLine] > PRIORITY) && ((curLine & 31) != curIlace))
+      {
+        continue;
+      }
+    }
+
+    XRectangle rect = {0,
+                       static_cast<short>(curLine),
+                       static_cast<unsigned short>(width_),
+                       1};
+
+    char *buffer;
+
+    logDebug("CorePoller::isChanged", "Checking line [%d].", curLine);
+
+    if ((buffer = getRect(rect)) == NULL)
+    {
+      logDebug("CorePoller::isChanged", "Failed to retrieve line [%d].", curLine);
+
+      return -1;
+    }
+
+    if (memcmp(buffer, buffer_ + curLine * bpl_, bpl_) == 0 || differ(buffer, rect) == 0)
+    {
+      logDebug("CorePoller::isChanged", "Data buffer didn't change.");
+
+      lineStatus_[curLine] = LINE_NOT_CHANGED;
+
+      continue;
+    }
+
+    rect.x = lefts_[rect.y];
+    rect.width = rights_[rect.y] - lefts_[rect.y] + 1;
+
+    update(buffer + rect.x * bpp_, rect);
+
+    foundChanges = 1;
+
+    lineStatus_[curLine] = LINE_HAS_CHANGED;
+
+    //
+    // Wake up the next line.
+    //
+
+    if (linePriority_[curLine + 1] > PRIORITY)
+    {
+      linePriority_[curLine + 1] = HIGHEST_PRIORITY;
+    }
+
+    //
+    // Give this line priority.
+    //
+
+    linePriority_[curLine] = HIGHEST_PRIORITY;
+
+    //
+    // Wake up previous line.
+    //
+
+    if (curLine > 0 && lineStatus_[curLine - 1] == LINE_NOT_CHECKED)
+    {
+      moveBackward = true;
+      curLine -= 2;
+    }
+  }
+
+  //
+  // Execution reached the end of loop.
+  //
+
+  if (curLine == (int) height_)
+  {
+    idxIlace = (idxIlace + 1) % 32;
+
+    curLine = 0;
+  }
+
+  //
+  // Create the region of changed pixels.
+  //
+
+  if (foundChanges)
+  {
+    int start, last, curWorkLine, left, right;
+
+    for (curWorkLine = 0; curWorkLine < (int) height_; curWorkLine++)
+    {
+      if (lineStatus_[curWorkLine] == LINE_HAS_CHANGED)
+      {
+        break;
+      }
+    }
+
+    start = curWorkLine;
+    last = curWorkLine;
+
+    left = lefts_[curWorkLine];
+    right = rights_[curWorkLine];
+    curWorkLine++;
+
+    while (1)
+    {
+      for (; curWorkLine < (int) height_; curWorkLine++)
+      {
+        if (lineStatus_[curWorkLine] == LINE_HAS_CHANGED)
+        {
+          break;
+        }
+      }
+
+      if (curWorkLine == (int) height_)
+      {
+        break;
+      }
+
+      if ((curWorkLine - last > minSliceHeight_) ||
+          (last - start > maxSliceHeight_))
+      {
+        XRectangle rect = {static_cast<short>(left),
+                           static_cast<short>(start),
+                           static_cast<unsigned short>(right - left + 1),
+                           static_cast<unsigned short>(last - start + 1)};
+
+        XUnionRectWithRegion(&rect, lastUpdatedRegion_, lastUpdatedRegion_);
+
+        start = curWorkLine;
+        left = lefts_[curWorkLine];
+        right = rights_[curWorkLine];
+      }
+      else
+      {
+        if (lefts_[curWorkLine] < left)
+        {
+          left = lefts_[curWorkLine];
+        }
+
+        if (rights_[curWorkLine] > right)
+        {
+          right = rights_[curWorkLine];
+        }
+      }
+
+      last = curWorkLine;
+
+      curWorkLine++;
+    }
+
+    //
+    // Send last block.
+    //
+
+    if (last >= start)
+    {
+      XRectangle rect = {static_cast<short>(left),
+                         static_cast<short>(start),
+                         static_cast<unsigned short>(right - left + 1),
+                         static_cast<unsigned short>(last - start + 1)};
+
+      XUnionRectWithRegion(&rect, lastUpdatedRegion_, lastUpdatedRegion_);
+    }
+  }
+
+  return foundChanges;
+}
+
+int CorePoller::differ(char *buffer, XRectangle r)
+{
+  logTrace("CorePoller::differ");
+
+  int bpl = bpp_ * r.width;
+  int i;
+  char *pBuf;
+  char *pFb;
+
+  pBuf = (buffer);
+  pFb = (buffer_ + r.x + r.y * bpl_);
+
+  for (i = 0; i < bpl; i++)
+  {
+    if (*pFb++ != *pBuf++)
+    {
+      lefts_[r.y] = i / bpp_;
+
+      break;
+    }
+  }
+
+  if (i == bpl)
+  {
+    return 0;
+  }
+
+  pBuf = (buffer) + bpl - 1;
+  pFb = (buffer_ + r.x + r.y * bpl_) + bpl - 1;
+
+  int j = i - 1;
+
+  for (i = bpl - 1; i > j; i--)
+  {
+    if (*pFb-- != *pBuf--)
+    {
+      rights_[r.y] = i / bpp_;
+
+      break;
+    }
+  }
+
+  return 1;
+}
+
+void CorePoller::update(char *src, XRectangle r)
+{
+  logTrace("CorePoller::update");
+
+  char *dst = buffer_ + r.x * bpp_ + r.y * bpl_;
+  int bpl = bpp_ * r.width;
+
+  for (unsigned int i = 0; i < r.height; i++)
+  {
+    if(((r.x * bpp_ + r.y * bpl_) + bpl) > (bpl_ * height_))
+    {
+      //
+      // Out of bounds. Maybe a resize is going on.
+      //
+
+      continue;
+    }
+
+    memcpy(dst, src, bpl);
+
+    src += bpl;
+
+    dst += bpl_;
+  }
+}
+
+void CorePoller::handleEvent(Display *display, XEvent *event)
+{
+  logTrace("CorePoller::handleEvent");
+
+  switch (event -> type)
+  {
+    case KeyPress:
+    case KeyRelease:
+    {
+      handleKeyboardEvent(display, event);
+      break;
+    }
+    case ButtonPress:
+    case ButtonRelease:
+    case MotionNotify:
+    {
+      handleMouseEvent(display, event);
+      break;
+    }
+    default:
+    {
+      logTest("CorePoller::handleEvent", "Handling unexpected event [%d] from display [%p].",
+                  event -> type, display);
+      break;
+    }
+  }
+}
+
+void CorePoller::handleWebKeyEvent(KeySym keysym, Bool isKeyPress)
+{
+  logTrace("CorePoller::handleWebKeyEvent");
+
+  handleWebKeyboardEvent(keysym, isKeyPress);
+}
+
+void CorePoller::handleInput()
+{
+  while (input_ -> checkIfEvent())
+  {
+    Display *display = input_ -> currentDisplay();
+    XEvent *event = input_ -> popEvent();
+
+    handleEvent(display, event);
+
+    delete event;
+  }
+}
+
+void CorePoller::createFrameBuffer()
+{
+  logTrace("CorePoller::createFrameBuffer");
+
+  if (buffer_ == NULL)
+  {
+    buffer_ = new char[bpl_ * height_];
+  }
+}

nxcompshad/src/Core.h

@@ -0,0 +1,208 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef CorePoller_H
+#define CorePoller_H
+
+#include <stdio.h>
+
+#include "Logger.h"
+#include "Regions.h"
+#include "Input.h"
+
+typedef enum{
+  LINE_HAS_CHANGED,
+  LINE_NOT_CHECKED,
+  LINE_NOT_CHANGED
+} LineStatus;
+
+typedef enum{
+  HIGHEST_PRIORITY = 0,
+  PRIORITY = 30,
+  NOT_PRIORITY = 90
+} LinePriority;
+
+class CorePoller
+{
+  public:
+
+  CorePoller(Input*, Display*);
+
+  virtual ~CorePoller();
+
+  virtual int init();
+
+  unsigned int width() const;
+
+  unsigned int height() const;
+
+  unsigned char depth() const;
+
+  int isChanged(int (*)(void*), void *, int *);
+
+  char *getFrameBuffer() const;
+
+  void destroyFrameBuffer();
+
+  void createFrameBuffer();
+
+  Region lastUpdatedRegion();
+
+  Region getLastUpdatedRegion();
+
+  void handleInput();
+
+  void handleEvent(Display *, XEvent *);
+
+  void handleWebKeyEvent(KeySym keysym, Bool isKeyPress);
+
+  Display *getShadowDisplay();
+
+  void setShadowDisplay(Display *shadowDisplay);
+
+  protected:
+
+  unsigned int bpp_;
+
+  unsigned int bpl_;
+
+  unsigned int width_;
+
+  unsigned int height_;
+
+  int depth_;
+
+  char *buffer_;
+
+  unsigned long redMask_;
+  unsigned long greenMask_;
+  unsigned long blueMask_;
+  unsigned long colorMask_[3];
+
+  char mirror_;
+
+  char mirrorChanges_;
+
+  virtual int updateShadowFrameBuffer(void) = 0;
+
+  virtual char *getRect(XRectangle r) = 0;
+
+  int imageByteOrder_;
+
+  Display *shadowDisplay_;
+
+  void update(char *src, XRectangle r);
+
+  Region lastUpdatedRegion_;
+
+  private:
+
+  virtual void handleKeyboardEvent(Display *, XEvent *) = 0;
+
+  virtual void handleWebKeyboardEvent(KeySym keysym, Bool isKeyPress) = 0;
+
+  virtual void handleMouseEvent(Display *, XEvent *) = 0;
+
+  Input *input_;
+
+  static const int maxSliceHeight_;
+  static const int minSliceHeight_;
+
+  LineStatus *lineStatus_;
+  int *linePriority_;
+
+  static const char interlace_[];
+
+  int *lefts_;
+  int *rights_;
+
+  // FIXME: Make them friend.
+
+  int differ(char *src, XRectangle r);
+};
+
+inline unsigned int CorePoller::width() const
+{
+  return width_;
+}
+
+inline unsigned int CorePoller::height() const
+{
+  return height_;
+}
+
+inline unsigned char CorePoller::depth() const
+{
+  return depth_;
+}
+
+inline char *CorePoller::getFrameBuffer() const
+{
+  return buffer_;
+}
+
+inline void CorePoller::destroyFrameBuffer()
+{
+  if (buffer_ != NULL)
+  {
+    delete[] buffer_;
+    buffer_ = NULL;
+  }
+}
+
+inline Region CorePoller::lastUpdatedRegion()
+{
+  Region region = lastUpdatedRegion_;
+
+  lastUpdatedRegion_ = XCreateRegion();
+
+  if (lastUpdatedRegion_ == NULL)
+  {
+    logError("CorePoller::lastUpdatedRegion", ESET(ENOMEM));
+
+    lastUpdatedRegion_ = region;
+
+    return NULL;
+  }
+
+  return region;
+}
+
+inline Region CorePoller::getLastUpdatedRegion()
+{
+  return lastUpdatedRegion_;
+}
+
+inline Display *CorePoller::getShadowDisplay()
+{
+  return shadowDisplay_ ;
+}
+
+inline void CorePoller::setShadowDisplay(Display *shadowDisplay)
+{
+  shadowDisplay_ = shadowDisplay;
+}
+
+#endif /* CorePoller_H */

nxcompshad/src/Input.cpp

@@ -0,0 +1,179 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include "Input.h"
+#include "Logger.h"
+
+Input::Input()
+{
+  logTrace("Input::Input");
+
+  eventsHead_ = NULL;
+  eventsTail_ = NULL;
+  keymap_ = NULL;
+}
+
+Input::~Input()
+{
+  logTrace("Input::~Input");
+
+  Event *head = eventsHead_;
+
+  while (head)
+  {
+    Event *next = head -> next;
+
+    delete head -> event;
+    delete head;
+
+    head = next;
+  }
+
+  if (keymap_ != NULL)
+  {
+    logDebug("Input::~Input", "Delete keymap_ [%p].", keymap_);
+
+    delete [] keymap_;
+  }
+}
+
+void Input::pushEvent(Display *display, XEvent *event)
+{
+  Event *tail = new Event;
+
+  if (tail == NULL)
+  {
+    logError("Input::pushEvent", ESET(ENOMEM));
+
+    return;
+  }
+
+  tail -> next = NULL;
+  tail -> display = display;
+  tail -> event = event;
+
+  if (eventsHead_ == NULL)
+  {
+    eventsHead_ = tail;
+  }
+  else
+  {
+    eventsTail_ -> next = tail;
+  }
+
+  eventsTail_ = tail;
+}
+
+XEvent *Input::popEvent()
+{
+  Event *head = eventsHead_;
+
+  if (head == NULL)
+  {
+    return 0;
+  }
+
+  XEvent *event = head -> event;
+
+  eventsHead_ = head -> next;
+
+  delete head;
+
+  if (eventsHead_ == NULL)
+  {
+    eventsTail_ = NULL;
+  }
+
+  return event;
+}
+
+int Input::removeAllEvents(Display *display)
+{
+  logTrace("Input::removeAllEvents");
+
+  int nRemoved = 0;
+
+  Event *current = eventsHead_;
+
+  while (current)
+  {
+    if (display == current -> display)
+    {
+      //
+      // Update head of list.
+      //
+
+      if (current == eventsHead_)
+      {
+        eventsHead_ = current -> next;
+      }
+
+      //
+      // Update tail of list.
+      //
+
+      if (current == eventsTail_)
+      {
+        eventsTail_ = eventsHead_;
+
+        while (eventsTail_ && eventsTail_ -> next)
+        {
+          eventsTail_ = eventsTail_ -> next;
+        }
+      }
+
+      //
+      // Remove event.
+      //
+
+      Event *next = current -> next;
+
+      delete current -> event;
+      delete current;
+
+      current = next;
+
+      nRemoved++;
+    }
+    else
+    {
+      current = current -> next;
+    }
+  }
+
+  return nRemoved;
+}
+

nxcompshad/src/Input.h

@@ -0,0 +1,99 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Input_H
+#define Input_H
+
+#include <nx-X11/Xlib.h>
+
+typedef struct Event
+{
+  struct Event *next;
+  Display *display;
+  XEvent *event;
+} Event;
+
+class Input
+{
+  public:
+
+  Input();
+
+  ~Input();
+
+  int checkIfEvent();
+
+  void pushEvent(Display *, XEvent *);
+
+  XEvent *popEvent();
+  Display *currentDisplay();
+
+  int removeAllEvents(Display *);
+
+  void setKeymap(char *keymap);
+  char *getKeymap();
+
+  void setShadowDisplayName(char *shadowDisplayName);
+  char *getShadowDisplayName();
+
+  private:
+
+  Event *eventsHead_;
+  Event *eventsTail_;
+  char *keymap_;
+  char *shadowDisplayName_;
+};
+
+inline Display *Input::currentDisplay()
+{
+  return eventsHead_ ? eventsHead_ -> display : NULL;
+}
+
+inline int Input::checkIfEvent()
+{
+  return (eventsHead_ != NULL);
+}
+
+inline void Input::setKeymap(char *keymap)
+{
+  keymap_ = keymap;
+}
+
+inline char *Input::getKeymap()
+{
+  return keymap_;
+}
+
+inline void Input::setShadowDisplayName(char *shadowDisplayName)
+{
+  shadowDisplayName_ = shadowDisplayName;
+}
+
+inline char *Input::getShadowDisplayName()
+{
+  return shadowDisplayName_;
+}
+
+#endif /* Input_H */

nxcompshad/src/Logger.cpp

@@ -0,0 +1,128 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#define DEBUG
+
+#include "Misc.h"
+#include "Logger.h"
+
+Logger logger;
+
+void Logger::user(const char *format, va_list arguments)
+{
+  char string[1024];
+
+  vsnprintf(string, 1024, format, arguments);
+
+  fprintf(stderr, "%s\n", string);
+}
+
+void Logger::error(const char *name, int error)
+{
+  fprintf(stderr, "PANIC! %s: Failed with code %d: %s\n",
+               name, error, strerror(error));
+}
+
+void Logger::warning(const char *name, const char *format, va_list arguments)
+{
+  char string[1024];
+
+  vsnprintf(string, 1024, format, arguments);
+
+  fprintf(stderr, "%s: WARNING! %s\n", name, string);
+}
+
+void Logger::test(const char *name, const char *format, va_list arguments)
+{
+  char string[1024];
+
+  vsnprintf(string, 1024, format, arguments);
+
+  fprintf(stderr, "%s: %s\n", name, string);
+}
+
+void Logger::trace(const char *name)
+{
+  fprintf(stderr, "%s\n", name);
+}
+
+void Logger::debug(const char *name, const char *format, va_list arguments)
+{
+  char string[1024];
+
+  vsnprintf(string, 1024, format, arguments);
+
+  fprintf(stderr, "%s: %s\n", name, string);
+}
+
+void Logger::dump(const char *name, const char *data, int size)
+{
+  fprintf(stderr, "%s: Dumping %d bytes of data at %p\n",
+              name, size, data);
+
+  for (int i = 0; i < size;)
+  {
+    fprintf(stderr, "[%d]\t", i);
+
+    int t = i;
+
+    for (unsigned int ii = 0; i < size && ii < 8; i++, ii++)
+    {
+      fprintf(stderr, "%02x/%d\t", data[i] & 0xff, data[i]);
+    }
+
+    for (unsigned int ii = i % 8; ii > 0 && ii < 8; ii++)
+    {
+      fprintf(stderr, "\t");
+    }
+
+    i = t;
+
+    for (unsigned int ii = 0; i < size && ii < 8; i++, ii++)
+    {
+      if (isprint(data[i]))
+      {
+        fprintf(stderr, "%c", data[i]);
+      }
+      else
+      {
+        fprintf(stderr, ".");
+      }
+    }
+
+    fprintf(stderr, "\n");
+  }
+}

nxcompshad/src/Logger.h

@@ -0,0 +1,167 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Logger_H
+#define Logger_H
+
+#include <cerrno>
+#include <cstdarg>
+
+//
+// Error handling macros.
+//
+
+#define ESET(e)  (errno = (e))
+#define EGET()   (errno)
+#define ESTR()   strerror(errno)
+
+extern class Logger logger;
+
+class Logger
+{
+  public:
+
+  void user(const char *format, va_list arguments) __attribute__((format(printf, 2, 0)));
+
+  void error(const char *name, int error);
+
+  void warning(const char *name, const char *format, va_list arguments) __attribute__((format(printf, 3, 0)));
+
+  void test(const char *name, const char *format, va_list arguments) __attribute__((format(printf, 3, 0)));
+
+  void trace(const char *name);
+
+  void debug(const char *name, const char *format, va_list arguments) __attribute__((format(printf, 3, 0)));
+
+  void dump(const char *name, const char *data, int size);
+};
+
+static inline void logUser(const char *format, ...) \
+    __attribute__((format(printf, 1, 2))) __attribute__((__unused__));
+
+static inline void logError(const char *name, int error) \
+    __attribute__((__unused__));
+
+static inline void logWarning(const char *name, const char *format, ...) \
+    __attribute__((format(printf, 2, 3))) __attribute__((__unused__));
+
+static inline void logTest(const char *name, const char *format, ...) \
+    __attribute__((format(printf, 2, 3))) __attribute__((__unused__));
+
+static inline void logTrace(const char *name) \
+    __attribute__((__unused__));
+
+static inline void logDebug(const char *name, const char *format, ...) \
+    __attribute__((format(printf, 2, 3))) __attribute__((__unused__));
+
+static inline void logDump(const char *name, const char *data, int size) \
+    __attribute__((__unused__));
+
+static inline void logUser(const char *format, ...)
+{
+  va_list arguments;
+
+  va_start(arguments, format);
+
+  logger.user(format, arguments);
+
+  va_end(arguments);
+}
+
+static inline void logError(const char *name, int error)
+{
+  #if defined(DEBUG) || defined(TEST) || \
+          defined(WARNING) || defined(PANIC)
+
+  logger.error(name, error);
+
+  #endif
+}
+
+static inline void logWarning(const char *name, const char *format, ...)
+{
+  #if defined(DEBUG) || defined(TEST) || \
+          defined(WARNING)
+
+  va_list arguments;
+
+  va_start(arguments, format);
+
+  logger.warning(name, format, arguments);
+
+  va_end(arguments);
+
+  #endif
+}
+
+static inline void logTest(const char *name, const char *format, ...)
+{
+  #if defined(TEST)
+
+  va_list arguments;
+
+  va_start(arguments, format);
+
+  logger.test(name, format, arguments);
+
+  va_end(arguments);
+
+  #endif
+}
+
+static inline void logTrace(const char *name)
+{
+  #if defined(DEBUG)
+
+  logger.trace(name);
+
+  #endif
+}
+
+static inline void logDebug(const char *name, const char *format, ...)
+{
+  #if defined(DEBUG)
+
+  va_list arguments;
+
+  va_start(arguments, format);
+
+  logger.debug(name, format, arguments);
+
+  va_end(arguments);
+
+  #endif
+}
+
+static inline void logDump(const char *name, const char *data, int size)
+{
+  #if defined(TEST)
+
+  logger.dump(name, data, size);
+
+  #endif
+}
+
+#endif /* Logger_H */

nxcompshad/src/Makefile.am

@@ -0,0 +1,54 @@
+NULL =
+
+lib_LTLIBRARIES = libXcompshad.la
+
+libXcompshad_la_SOURCES =				\
+    Core.cpp						\
+    Input.cpp						\
+    Logger.cpp						\
+    Manager.cpp						\
+    Shadow.cpp						\
+    Updater.cpp						\
+    X11.cpp						\
+    $(NULL)
+
+libXcompshad_la_LIBADD =				\
+    -lX11						\
+    @Xext_LIBS@						\
+    @Xdamage_LIBS@					\
+    @Xrandr_LIBS@					\
+    @Xtst_LIBS@						\
+    -L$(top_srcdir)/../nx-X11/lib/src/.libs -lNX_X11	\
+    $(NULL)
+
+AM_CFLAGS =						\
+    $(Xext_CFLAGS)					\
+    $(Xdamage_CFLAGS)					\
+    $(Xrandr_CFLAGS)					\
+    $(Xtst_CFLAGS)					\
+    $(NULL)
+
+AM_CXXFLAGS =						\
+    $(BASE_CXXFLAGS)					\
+    $(NULL)
+
+AM_CPPFLAGS =						\
+    -I$(top_srcdir)/include				\
+    -I$(top_srcdir)/../nx-X11/exports/include		\
+    $(NULL)
+
+libXcompshad_la_LDFLAGS =				\
+    -version-number @LT_COMPSHAD_VERSION@ -no-undefined	\
+    -R '$(libdir)/nx/X11'				\
+    $(NULL)
+
+if TARGET_ELF
+libXcompshad_la_LDFLAGS +=				\
+    -Wl,--enable-new-dtags				\
+    $(NULL)
+endif TARGET_ELF
+
+libXcompshadincludedir = $(includedir)/nx
+libXcompshadinclude_HEADERS =				\
+     $(top_srcdir)/include/Shadow.h			\
+     $(NULL)

nxcompshad/src/Manager.cpp

@@ -0,0 +1,264 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <nx-X11/Xlib.h>
+#include <nx-X11/Xutil.h>
+#include <nx-X11/keysym.h>
+#include <string.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include "Manager.h"
+#include "Logger.h"
+
+UpdateManager::UpdateManager(int w, int h, char *f, Input *i)
+  : width_(w), height_(h), frameBuffer_(f), input_(i)
+{
+  logTrace("UpdateManager::UpdateManager");
+
+  nUpdater = 0;
+  updaterVector = NULL;
+  updateManagerRegion_ = NULL;
+}
+
+UpdateManager::~UpdateManager()
+{
+  logTrace("UpdateManager::~UpdateManager");
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    delete updaterVector[i];
+  }
+
+  delete [] updaterVector;
+}
+
+Updater *UpdateManager::createUpdater(char *displayName, Display *display)
+{
+  Updater *updater = new Updater(displayName, display);
+
+  if (updater == NULL)
+  {
+    logError("UpdateManager::createUpdater", ESET(ENOMEM));
+
+    return NULL;
+  }
+
+  if (updater -> init(width_, height_, frameBuffer_, input_) == -1)
+  {
+    logError("UpdateManager::createUpdater", EGET());
+
+    delete updater;
+
+    return NULL;
+  }
+
+  return updater;
+}
+
+UpdaterHandle UpdateManager::addUpdater(char *displayName, Display *display)
+{
+  Updater *newUpdater = createUpdater(displayName, display);
+
+  if (newUpdater == NULL)
+  {
+    logError("UpdateManager::addUpdater", EGET());
+
+    return NULL;
+  }
+
+  Updater **newUpdaterVector = new Updater*[nUpdater + 1];
+
+  if (newUpdaterVector == NULL)
+  {
+    logError("UpdateManager::addUpdater", ESET(ENOMEM));
+
+    delete newUpdater;
+
+    return NULL;
+  }
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    newUpdaterVector[i] = updaterVector[i];
+  }
+
+  newUpdaterVector[nUpdater] = newUpdater;
+
+  delete [] updaterVector;
+
+  updaterVector = newUpdaterVector;
+
+  nUpdater++;
+
+  logTest("UpdateManager::AddUpdater", "Number of updaters [%d].", nUpdater);
+
+  return reinterpret_cast<UpdaterHandle>(newUpdater);
+}
+
+int UpdateManager::removeAllUpdaters()
+{
+  logTest("UpdateManager::removeAllUpdaters", "Number of updaters [%d].", nUpdater);
+
+  int nullUpdaters = 0;
+
+  for (int i = nUpdater; i > 0; i--)
+  {
+    if (removeUpdater(reinterpret_cast<UpdaterHandle>(updaterVector[i - 1])) == 0)
+    {
+      nullUpdaters++;
+    }
+  }
+
+  if (nUpdater == 0)
+  {
+    return 1;
+  }
+
+  if (nUpdater == nullUpdaters)
+  {
+    logTest("UpdateManager::removeAllUpdaters", "Ignored null records in Updater vector.");
+
+    return 0;
+  }
+
+  logTest("UpdateManager::removeAllUpdaters", "Failed to remove some updaters.");
+
+  return -1;
+}
+
+int UpdateManager::removeUpdater(UpdaterHandle handle)
+{
+  Updater * const updater = (Updater*) handle;
+
+  logTest("UpdateManager::removeUpdater", "Removing Updater [%p].", updater);
+
+  if (updater == NULL)
+  {
+    return 0;
+  }
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    if (updater == updaterVector[i])
+    {
+      updaterVector[i] = updaterVector[nUpdater - 1];
+
+      nUpdater--;
+
+      delete updater;
+
+      return 1;
+    }
+  }
+
+  logTest("UpdateManager::removeUpdater", "Couldn't find Updater [%p].", updater);
+
+  return -1;
+}
+
+void UpdateManager::addRegion(Region region)
+{
+  logTrace("UpdateManager::addRegion");
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    updaterVector[i] -> addRegion(region);
+  }
+
+  XDestroyRegion(region);
+}
+
+void UpdateManager::update()
+{
+  logTrace("UpdateManager::update");
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    /*updaterVector[i] -> update();*/
+    if (updaterVector[i] -> getUpdateRegion())
+    {
+      logDebug("UpdateManager::update", "pRegion [%p] rect[%ld].",
+                   updaterVector[i] -> getUpdateRegion(), (updaterVector[i] -> getUpdateRegion()) -> numRects);
+
+      updateManagerRegion_ = updaterVector[i] -> getUpdateRegion();
+      //
+      // FIXME: Remove me.
+      //
+      for (int j = 0; j < updateManagerRegion_ -> numRects; j++)
+      {
+        int x = updateManagerRegion_ -> rects[j].x1;
+        int y = updateManagerRegion_ -> rects[j].y1;
+        unsigned int width = updateManagerRegion_ -> rects[j].x2 - updateManagerRegion_ -> rects[j].x1;
+        unsigned int height = updateManagerRegion_ -> rects[j].y2 - updateManagerRegion_ -> rects[j].y1;
+        logDebug("UpdateManager::update", "x[%d]y[%d]width[%u]height[%u], updateManagerRegion_[%p]",
+                  x, y, width, height, updateManagerRegion_);
+      }
+    }
+  }
+}
+
+void UpdateManager::handleInput()
+{
+  logTrace("UpdateManager::handleInput");
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    try
+    {
+      updaterVector[i] -> handleInput();
+    }
+    catch (UpdaterClosing u)
+    {
+      logTest("UpdateManager::handleInput", "Caught exception UpdaterClosing().");
+
+      removeUpdater((UpdaterHandle)updaterVector[i]);
+
+      //
+      // Now the i-element of the updaterVector
+      // is changed. We don't want to skip it.
+      //
+
+      i--;
+    }
+  }
+}
+
+void UpdateManager::newRegion()
+{
+  logTrace("UpdateManager::newRegion");
+
+  for (int i = 0; i < nUpdater; i++)
+  {
+    updaterVector[i] -> newRegion();
+  }
+}

nxcompshad/src/Manager.h

@@ -0,0 +1,123 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef UpdateManager_H
+#define UpdateManager_H
+
+#include <nx-X11/Xlib.h>
+
+#include "Updater.h"
+#include "Regions.h"
+#include "Input.h"
+
+typedef char* UpdaterHandle;
+
+class UpdateManager
+{
+  public:
+
+  UpdateManager(int, int, char *, Input *);
+
+  ~UpdateManager();
+
+  void handleInput();
+
+  void addRegion(Region);
+
+  void update();
+
+  UpdaterHandle addUpdater(char *displayName, Display *display);
+
+  int removeUpdater(UpdaterHandle);
+
+  int removeAllUpdaters();
+
+  int numberOfUpdaters();
+
+  int getWidth();
+
+  int getHeight();
+
+  char *getBuffer();
+
+  Region getUpdateManagerRegion();
+
+  void destroyUpdateManagerRegion();
+
+  void newRegion();
+
+  private:
+
+  Updater *createUpdater(char *displayName, Display *display);
+
+  int width_;
+  int height_;
+  char *frameBuffer_;
+  Input *input_;
+
+  int nUpdater;
+
+  Updater **updaterVector;
+
+  Region updateManagerRegion_;
+
+};
+
+inline int UpdateManager::numberOfUpdaters()
+{
+  return nUpdater;
+}
+
+inline int UpdateManager::getWidth()
+{
+  return width_;
+}
+
+inline int UpdateManager::getHeight()
+{
+  return height_;
+}
+
+inline char *UpdateManager::getBuffer()
+{
+  return frameBuffer_;
+}
+
+inline Region UpdateManager::getUpdateManagerRegion()
+{
+  return updateManagerRegion_;
+}
+
+inline void UpdateManager::destroyUpdateManagerRegion()
+{
+  if (updateManagerRegion_ != NULL)
+  {
+    XDestroyRegion(updateManagerRegion_);
+
+    updateManagerRegion_ = NULL;
+  }
+}
+
+#endif /* UpdateManager_H */

nxcompshad/src/Misc.h

@@ -0,0 +1,50 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Misc_H
+#define Misc_H
+
+#include <iostream>
+
+#include <cerrno>
+#include <cstring>
+
+using namespace std;
+
+//
+// Error handling macros.
+//
+
+#define ESET(e)  (errno = (e))
+#define EGET()   (errno)
+#define ESTR()   strerror(errno)
+
+//
+// Log file.
+//
+
+extern ostream *logofs;
+
+#endif /* Misc_H */

nxcompshad/src/Poller.h

@@ -0,0 +1,31 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Poller_H
+#define Poller_H
+
+#include "X11.h"
+
+#endif /* Poller_H */

nxcompshad/src/Regions.h

@@ -0,0 +1,43 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Region_H
+#define Region_H
+
+#include <nx-X11/Xlib.h>
+#include <nx-X11/Xutil.h>
+
+typedef struct {
+    short x1, x2, y1, y2;
+} Box, BOX, BoxRec, *BoxPtr;
+
+struct _XRegion {
+    long size;
+    long numRects;
+    BOX *rects;
+    BOX extents;
+};
+
+#endif /* Region_H */

nxcompshad/src/Shadow.cpp

@@ -0,0 +1,458 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <signal.h>
+#include <string.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include "Logger.h"
+#include "Shadow.h"
+#include "Poller.h"
+#include "Manager.h"
+
+typedef struct {
+    KeySym  *map;
+    KeyCode minKeyCode,
+            maxKeyCode;
+    int     mapWidth;
+} KeySymsRec, *KeySymsPtr;
+
+KeySymsPtr NXShadowKeymap = NULL;
+
+ShadowOptions NXShadowOptions = {1, 1, -1};
+
+static int mirrorException = 0;
+
+static UpdateManager *updateManager;
+static Poller *poller;
+static Input *input;
+
+inline bool NXShadowNotInitialized()
+{
+  //
+  // updateManager depends on input and poller.
+  // So this test seem redundant.
+  //
+  // return (input == NULL) || (poller == NULL) || (updateManager == NULL);
+  //
+
+  return (updateManager == NULL);
+}
+
+#ifdef NEED_SIGNAL_HANDLER
+static void NXSignalHandler(int signal)
+{
+  logTest("NXSignalHandler", "Got signal [%d]", signal);
+
+  if (signal == SIGINT)
+  {
+    mirrorException = 1;
+  }
+  else if (signal == SIGTERM)
+  {
+    mirrorException = 1;
+  }
+}
+
+static int NXInitSignal()
+{
+  logTrace("NXInitSignal");
+
+  struct sigaction sa;
+
+  sa.sa_handler = NXSignalHandler;
+  sigfillset(&sa.sa_mask);
+  sa.sa_flags = 0;
+
+  int res;
+
+  while ((res = sigaction(SIGINT, &sa, NULL)) == -1 &&
+             errno == EINTR);
+
+  if (res == -1)
+  {
+    logError("NXInitSignal", EGET());
+
+    return -1;
+  }
+
+  return 1;
+}
+#endif
+
+static void NXHandleException()
+{
+  if (mirrorException)
+  {
+    mirrorException = 0;
+
+    NXShadowRemoveAllUpdaters();
+  }
+}
+
+static int NXCreateInput(char *keymap, char *shadowDisplayName)
+{
+  logTrace("NXCreateInput");
+
+  input = new Input;
+
+  if (input == NULL)
+  {
+    logError("NXCreateInput", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  input -> setKeymap(keymap);
+
+  input -> setShadowDisplayName(shadowDisplayName);
+
+  return 1;
+}
+
+static int NXCreatePoller(Display *display, Display **shadowDisplay)
+{
+  logTrace("NXCreatePoller");
+
+  if (input == NULL)
+  {
+    logError("NXCreatePoller", ESET(EBADF));
+
+    return -1;
+  }
+
+  poller = new Poller(input,display);
+
+  if (poller == NULL)
+  {
+    logError("NXCreatePoller", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  if (poller -> init() == -1)
+  {
+    logWarning("NXCreatePoller", "Failed to initialize poller.");
+
+    return -1;
+  }
+
+  *shadowDisplay = poller -> getShadowDisplay();
+
+  logTest("NXCreatePoller", "Poller geometry [%d, %d], ShadowDisplay[%p].", poller -> width(),
+              poller -> height(), (Display *) *shadowDisplay);
+
+  return 1;
+}
+
+static int NXCreateUpdateManager()
+{
+  logTrace("NXCreateUpdateManager");
+
+  if (input == NULL || poller == NULL)
+  {
+    logError("NXCreateUpdateManager", ESET(EBADF));
+
+    return -1;
+  }
+
+  updateManager = new UpdateManager(poller -> width(), poller -> height(),
+                                        poller -> getFrameBuffer(), input);
+
+  if (updateManager == NULL)
+  {
+    logError("NXCreateUpdateManager", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  return 1;
+}
+
+void  NXShadowResetOptions()
+{
+  NXShadowOptions.optionShmExtension = 1;
+  NXShadowOptions.optionDamageExtension = 1;
+}
+
+//
+// Exported functions.
+//
+
+int NXShadowHasUpdaters()
+{
+  logTrace("NXShadowHasUpdaters");
+
+  return (updateManager && updateManager -> numberOfUpdaters()) ? 1 : 0;
+}
+
+int NXShadowRemoveAllUpdaters()
+{
+  logTrace("NXShadowRemoveAllUpdaters");
+
+  return updateManager ? updateManager -> removeAllUpdaters() : 0;
+}
+
+int NXShadowRemoveUpdater(UpdaterHandle handle)
+{
+  logTrace("NXShadowRemoveUpdater");
+
+  return updateManager ? updateManager -> removeUpdater(handle) : 0;
+}
+
+UpdaterHandle NXShadowAddUpdater(char *displayName)
+{
+  logTrace("NXShadowAddUpdater");
+
+  return updateManager ? updateManager -> addUpdater(displayName, NULL) : NULL;
+}
+
+int NXShadowAddUpdaterDisplay(void *dpy, int *w, int *h, unsigned char *d)
+{
+  Display *display = reinterpret_cast<Display*>(dpy);
+
+  logTrace("NXShadowAddUpdaterDisplay");
+
+  if ((updateManager ? updateManager -> addUpdater(NULL, display) : NULL) == NULL)
+  {
+    logTest("NXShadowAddUpdaterDisplay", "Error");
+
+    return 0;
+  }
+
+  *w = updateManager -> getWidth();
+  *h = updateManager -> getHeight();
+  *d = poller -> depth();
+
+  return 1;
+}
+
+int NXShadowCreate(void *dpy, char *keymap, char* shadowDisplayName, void **shadowDpy)
+{
+  logTrace("NXShadowCreate");
+
+  Display *display = reinterpret_cast<Display*>(dpy);
+  Display **shadowDisplay = reinterpret_cast<Display**>(shadowDpy);
+
+/*  if (NXInitSignal() != 1)
+  {
+    logError("NXShadowCreate", EGET());
+
+    return -1;
+  }*/
+
+  if (NXCreateInput(keymap, shadowDisplayName) != 1)
+  {
+    logError("NXShadowCreate", EGET());
+
+    return -1;
+  }
+
+  if (NXCreatePoller(display, shadowDisplay) != 1)
+  {
+    logWarning("NXShadowCreate", "NXCreatePoller failed.");
+
+    return -1;
+  }
+
+  if (NXCreateUpdateManager() != 1)
+  {
+    logError("NXShadowCreate", EGET());
+
+    return -1;
+  }
+
+  return 1;
+}
+
+void NXShadowSetDisplayUid(int uid)
+{
+  NXShadowOptions.optionShadowDisplayUid = uid;
+}
+
+void NXShadowDisableShm(void)
+{
+  logUser("NXShadowDisableShm: Disabling SHM.\n");
+
+  NXShadowOptions.optionShmExtension = 0;
+}
+
+void NXShadowDisableDamage(void)
+{
+  NXShadowOptions.optionDamageExtension = 0;
+}
+
+void NXShadowGetScreenSize(int *w, int *h)
+{
+  poller -> getScreenSize(w, h);
+}
+
+void NXShadowSetScreenSize(int *w, int *h)
+{
+  poller -> setScreenSize(w, h);
+}
+
+void NXShadowDestroy()
+{
+  if (poller)
+  {
+    delete poller;
+
+    poller = NULL;
+  }
+
+  if (updateManager)
+  {
+    delete updateManager;
+
+    updateManager = NULL;
+  }
+
+  if (input)
+  {
+    delete input;
+
+    input = NULL;
+  }
+}
+
+void NXShadowHandleInput()
+{
+  logTrace("NXShadowHandleInput");
+
+  if (NXShadowNotInitialized())
+  {
+    logError("NXShadowHandleInput - NXShadow not properly initialized.", ESET(EBADF));
+
+    return;
+  }
+
+  NXHandleException();
+
+  updateManager -> handleInput();
+
+  poller -> handleInput();
+}
+
+int NXShadowHasChanged(int (*callback)(void *), void *arg, int *suspended)
+{
+  int result;
+
+  logTrace("NXShadowHasChanged");
+
+  if (NXShadowNotInitialized())
+  {
+    logError("NXShadowHasChanged - NXShadow not properly initialized.", ESET(EBADF));
+
+    return -1;
+  }
+
+  //
+  // FIXME
+  //updateManager -> destroyUpdateManagerRegion();
+  //
+
+  updateManager -> newRegion();
+
+  poller -> getEvents();
+
+  result = poller -> isChanged(callback, arg, suspended);
+
+  if (result == 1)
+  {
+    updateManager -> addRegion(poller -> lastUpdatedRegion());
+
+    return 1;
+  }
+  else if (result == -1)
+  {
+    logTest("NXShadowHasChanged", "Scanline error.");
+    return -1;
+  }
+
+  return 0;
+}
+
+void NXShadowExportChanges(long *numRects, char **pBox)
+{
+  Region pReg;
+
+  logTrace("NXShadowExportChanges");
+
+  if (NXShadowNotInitialized())
+  {
+    logError("NXShadowExportChanges - NXShadow not properly initialized.", ESET(EBADF));
+  }
+
+  updateManager -> update();
+  pReg = updateManager -> getUpdateManagerRegion();
+  *numRects = pReg -> numRects;
+  *pBox = (char *)pReg -> rects;
+
+  logTest("NXShadowExportChanges", "numRects [%ld] pBox[%p], pReg->numRects[%ld], rects[%p], size[%lu]",
+              *numRects, *pBox, pReg -> numRects, &(pReg -> rects -> x2),
+                  (unsigned long) sizeof(pReg -> rects -> x2));
+}
+
+void NXShadowEvent(Display *display, XEvent event)
+{
+  poller -> handleEvent(display, &event);
+}
+
+void NXShadowWebKeyEvent(KeySym keysym, Bool isKeyPress)
+{
+  poller -> handleWebKeyEvent(keysym, isKeyPress);
+}
+
+void NXShadowUpdateBuffer(void **buffer)
+{
+  char **fBuffer = reinterpret_cast<char **>(buffer);
+
+  if (*fBuffer != NULL)
+  {
+    poller -> destroyFrameBuffer();
+
+    poller -> init();
+  }
+
+  *fBuffer = poller -> getFrameBuffer();
+
+  logTest("NXShadowUpdateBuffer","New frame buffer [0x%p]", (void *)*fBuffer);
+}
+
+void NXShadowInitKeymap(void *keysyms)
+{
+  NXShadowKeymap = (KeySymsPtr) keysyms;
+
+  logTest("NXShadowInitKeymap","KeySyms pointer [0x%p]", (void *)NXShadowKeymap);
+}

nxcompshad/src/Updater.cpp

@@ -0,0 +1,395 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <nx-X11/Xlib.h>
+#include <nx-X11/Xutil.h>
+#include <nx-X11/keysym.h>
+#include <string.h>
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+//
+#include <stdio.h>
+//
+#include "Updater.h"
+#include "Logger.h"
+
+Updater::Updater(char *displayName, Display *display)
+{
+  logTrace("Updater::Updater");
+
+  displayName_ = displayName;
+  display_ = display;
+  closeDisplay_ = false;
+  image_ = NULL;
+  updateRegion_ = NULL;
+  buffer_ = NULL;
+}
+
+Updater::~Updater()
+{
+  logTrace("Updater::~Updater");
+
+  if (input_)
+  {
+    int removedEvents = input_ -> removeAllEvents(display_);
+
+    logTest("Updater::~Updater", "Removed events in input queue is [%d].", removedEvents);
+  }
+
+  if (display_)
+  {
+    XDestroyWindow(display_, window_);
+    XFreePixmap(display_, pixmap_);
+
+    if (closeDisplay_)
+    {
+      XCloseDisplay(display_);
+    }
+  }
+
+  if (image_)
+  {
+    image_ -> data = NULL;
+
+    XDestroyImage(image_);
+  }
+
+  if (updateRegion_)
+  {
+    XDestroyRegion(updateRegion_);
+  }
+}
+
+int Updater::init(int width, int height, char *fb, Input *input)
+{
+  logTrace("Updater::init");
+
+  if (fb == NULL || input == NULL || width <= 0 || height <= 0)
+  {
+    logError("Updater::init", ESET(EINVAL));
+
+    return -1;
+  }
+
+  width_ = width;
+  height_ = height;
+  buffer_ = fb;
+  input_ = input;
+/*
+  if (display_ == NULL)
+  {
+    display_ = XOpenDisplay(displayName_);
+
+    closeDisplay_ = true;
+
+    if (display_ == NULL)
+    {
+      logError("Updater::init", ESET(ENOMSG));
+
+      return -1;
+    }
+  }
+*/
+  depth_ = DefaultDepth(display_, DefaultScreen(display_));
+
+  if (depth_ == 8) bpl_ = width_;
+  else if (depth_ == 16) bpl_ = width_ * 2;
+  else bpl_ = width_ * 4;
+
+  logTest("Updater::init", "Server geometry [%d, %d] depth [%d] bpl [%d].", width_, height_, depth_, bpl_);
+
+/*  int bitmap_pad = 8;
+
+  image_ = XCreateImage(display_, DefaultVisual(display_, DefaultScreen(display_)), depth_, ZPixmap, 0,
+                            buffer_, width_, height_, bitmap_pad, 0);
+
+  if (image_ == NULL)
+  {
+    logError("Updater::init", ESET(ENOMSG));
+
+    logTest("Updater::init", "Failed to create default image.");
+
+    return -1;
+  }
+
+  pixmap_ = XCreatePixmap(display_, DefaultRootWindow(display_), width_, height_, depth_);
+
+  unsigned int mask = CWBackPixmap | CWBorderPixel | CWEventMask;
+
+  XSetWindowAttributes attributes;
+
+  attributes.background_pixmap = pixmap_;
+  attributes.border_pixel = WhitePixel(display_, DefaultScreen(display_));
+  attributes.event_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask;
+
+  window_ = XCreateWindow(display_, DefaultRootWindow(display_),
+                              0, 0, width_, height_, 0, depth_, InputOutput,
+                                  DefaultVisual(display_, DefaultScreen(display_)), mask, &attributes);
+
+  if (window_ == None)
+  {
+    logError("Updater::init", ESET(ENOMSG));
+
+    return -1;
+  }
+
+  XSizeHints *size_hints;
+
+  if ((size_hints = XAllocSizeHints()) == NULL)
+  {
+    logError("Updater::init", ESET(ENOMEM));
+
+    return -1;
+  }
+
+  size_hints -> flags = PMinSize | PMaxSize;
+  size_hints -> min_width = width_;
+  size_hints -> max_width = width_;
+  size_hints -> min_height = height_;
+  size_hints -> max_height = height_;
+
+  XSetWMNormalHints(display_, window_, size_hints);
+
+  XFree(size_hints);
+
+  Atom deleteWMatom = XInternAtom(display_, "WM_DELETE_WINDOW", 1);
+
+  XSetWMProtocols(display_, window_, &deleteWMatom, 1);
+
+  XMapWindow(display_, window_);*/
+
+  updateRegion_ = XCreateRegion();
+
+  logTest("Updater::init", "updateRegion_[%p]", updateRegion_);
+  return 1;
+}
+
+void Updater::addRegion(Region region)
+{
+  //
+  // FIXME: Is this too paranoid ?
+  //
+
+  if (updateRegion_ == NULL)
+  {
+    logError("Updater::addRegion", ESET(EINVAL));
+
+    return;
+  }
+
+  XUnionRegion(region, updateRegion_, updateRegion_);
+}
+
+void Updater::update()
+{
+  logTrace("Updater::update");
+
+  if (updateRegion_ == NULL)
+  {
+    logError("Updater::update", ESET(EINVAL));
+
+    return;
+  }
+
+  logTest("Updater::update", "Number of rectangles [%ld].", updateRegion_ -> numRects);
+
+/*  for (; updateRegion_ -> numRects > 0; updateRegion_ -> numRects--)
+  {
+    int n = updateRegion_ -> numRects - 1;
+
+    int x = updateRegion_ -> rects[n].x1;
+    int y = updateRegion_ -> rects[n].y1;
+    unsigned int width = updateRegion_ -> rects[n].x2 - updateRegion_ -> rects[n].x1;
+    unsigned int height = updateRegion_ -> rects[n].y2 - updateRegion_ -> rects[n].y1;
+
+    logDebug("Updater::update", "Sending rectangle: [%d, %d, %d, %d].", x, y, width, height);
+
+    //
+    // We need to update the extents.
+    //
+
+    int bitmap_pad;
+
+    if (depth_ == 32 || depth_ == 24)
+    {
+      bitmap_pad = 32;
+    }
+    else if (depth_ == 16)
+    {
+      if ((width & 1) == 0)
+      {
+        bitmap_pad = 32;
+      }
+      else
+      {
+        bitmap_pad = 16;
+      }
+    }
+    else if ((width & 3) == 0)
+    {
+      bitmap_pad = 32;
+    }
+    else if ((width & 1) == 0)
+    {
+      bitmap_pad = 16;
+    }
+    else
+    {
+      bitmap_pad = 8;
+    }*/
+
+/*    image_ -> bitmap_pad = bitmap_pad;*/
+
+   /* NXShadowCorrectColor(x, y, width, height);*/
+
+/*    XPutImage(display_, pixmap_, DefaultGC(display_, DefaultScreen(display_)),
+                  image_, x, y, x, y, width, height);
+
+    XClearArea(display_, window_, x, y, width, height, 0);
+  }*/
+
+  //
+  // Should we reduces the box vector ?
+  //
+  // BOX *box = Xrealloc(updateRegion_ -> rects,
+  //                         updateRegion_ -> numRects == 0 ? sizeof(BOX) :
+  //                             updateRegion_ -> numRects * sizeof(BOX));
+  //
+  // if (box)
+  // {
+  //   updateRegion_ -> rects = box;
+  //   updateRegion_ -> size = 1;
+  // }
+  //
+
+  if (updateRegion_ -> numRects == 0)
+  {
+    updateRegion_ -> extents.x1 = 0;
+    updateRegion_ -> extents.y1 = 0;
+    updateRegion_ -> extents.x2 = 0;
+    updateRegion_ -> extents.y2 = 0;
+  }
+  else
+  {
+    //
+    // FIXME: We have to update the region extents.
+    //
+
+    logTest("Updater::update", "Region extents has not been updated.");
+  }
+}
+
+void Updater::handleInput()
+{
+  logTrace("Updater::handleInput");
+
+  XEvent *event = new XEvent;
+
+  if (event == NULL)
+  {
+    logError("Updater::handleInput", ESET(ENOMEM));
+
+    return;
+  }
+
+  while (XCheckIfEvent(display_, event, anyEventPredicate, NULL))
+  {
+    switch (event -> type)
+    {
+     /* case ClientMessage:
+      {
+        Atom wmProtocols = XInternAtom(display_, "WM_PROTOCOLS", 0);
+        Atom wmDeleteWindow = XInternAtom(display_, "WM_DELETE_WINDOW", 0);
+
+        if (event -> xclient.message_type == wmProtocols &&
+                (Atom)event -> xclient.data.l[0] == wmDeleteWindow)
+        {
+          logTest("Updater::handleInput", "Got client message of type WM_PROTOCOLS and value WM_DELETE_WINDOW,"
+                      " throwing exception UpdaterClosing.");
+
+          delete event;
+
+          throw UpdaterClosing();
+        }
+        else
+        {
+          logTest("Updater::handleInput", "Unexpected client message type [%ld] format [%d] first value [%ld]",
+                      event -> xclient.message_type, event -> xclient.format, event -> xclient.data.l[0]);
+        }
+
+        break;
+      }*/
+      case KeyPress:
+      case KeyRelease:
+      case ButtonPress:
+      case ButtonRelease:
+      case MotionNotify:
+      {
+        input_ -> pushEvent(display_, event);
+
+        event = new XEvent;
+
+        if (event == NULL)
+        {
+          logError("Updater::handleInput", ESET(ENOMEM));
+
+          return;
+        }
+
+        break;
+      }
+      default:
+      {
+        logTest("Updater::handleInput", "Handling unexpected event [%d].", event -> type);
+
+        break;
+      }
+    }
+  }
+
+  delete event;
+}
+
+void Updater::newRegion()
+{
+  if (updateRegion_ != NULL)
+  {
+    XDestroyRegion(updateRegion_);
+  }
+
+  updateRegion_ = XCreateRegion();
+
+  logTest("Updater::newRegion", "updateRegion_ [%p].", updateRegion_);
+}
+//
+// Private functions.
+//

nxcompshad/src/Updater.h

@@ -0,0 +1,103 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Updater_H
+#define Updater_H
+
+#include <nx-X11/Xlib.h>
+
+#include "Regions.h"
+#include "Input.h"
+
+class UpdaterClosing {};
+
+class Updater
+{
+  public:
+
+  Updater(char *displayName, Display *display);
+
+  ~Updater();
+
+  int init(int, int, char *, Input*);
+
+  void addRegion(Region r);
+
+  void update();
+
+  void handleInput();
+
+  XImage *getImage();
+
+  Region getUpdateRegion();
+
+  void newRegion();
+
+  private:
+
+  Input *input_;
+
+  static inline Bool anyEventPredicate(Display*, XEvent*, XPointer);
+
+  void handleKeyboardEvent(XEvent &event);
+
+  char *displayName_;
+
+  char *buffer_;
+
+  bool closeDisplay_;
+
+  Display *display_;
+
+  int depth_;
+
+  int width_;
+  int height_;
+
+  int bpl_;
+
+  Window window_;
+  XImage *image_;
+
+  Pixmap pixmap_;
+
+  Region updateRegion_;
+
+};
+
+Bool Updater::anyEventPredicate(Display*, XEvent*, XPointer)
+{
+  return true;
+}
+
+inline XImage* Updater::getImage()
+{
+  return image_;
+}
+inline Region Updater::getUpdateRegion()
+{
+  return updateRegion_;
+}
+#endif /* Updater_H */

nxcompshad/src/X11.h

@@ -0,0 +1,135 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMPSHAD, NX protocol compression and NX extensions to this software */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE which comes in the source       */
+/* distribution.                                                          */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef X11Poller_H
+#define X11Poller_H
+
+#include <nx-X11/Xlib.h>
+#include <X11/extensions/XShm.h>
+#include "X11/include/Xdamage_nxcompshad.h"
+#include "X11/include/Xrandr_nxcompshad.h"
+
+#include "Core.h"
+
+class Poller : public CorePoller
+{
+  public:
+
+  Poller(Input *, Display *display, int = 0);
+
+  ~Poller();
+
+  int init();
+
+  void setRootSize();
+
+  void destroyShmImage();
+
+  void getEvents(void);
+
+  void getScreenSize(int *width, int *height);
+
+  void setScreenSize(int *width, int *height);
+
+  private:
+
+  Display *display_;
+
+  char *shadowDisplayName_;
+
+  int shadowDisplayUid_;
+
+  char *tmpBuffer_;
+
+  char xtestExtension_;
+
+  char shmExtension_;
+
+  char randrExtension_;
+
+  int randrEventBase_;
+
+  char damageExtension_;
+
+  int damageEventBase_;
+
+  Damage damage_;
+
+  XShmSegmentInfo *shminfo_;
+
+  XImage *image_;
+
+  int updateShadowFrameBuffer(void);
+
+  char *getRect(XRectangle);
+
+  void keymapShadowInit(Display *display);
+
+  void keymapMasterInit();
+
+  KeySym keymapKeycodeToKeysym(KeyCode keycode, KeySym *keysyms,
+                                   int minKey, int per, int col);
+
+  KeyCode keymapKeysymToKeycode(KeySym keysym, KeySym *keysyms,
+                                    int minKey, int maxKey, int per, int *col);
+
+  KeyCode translateKeysymToKeycode(KeySym keysym, int *col);
+
+  Bool checkModifierKeys(KeySym keysym, Bool isKeyPress);
+
+  void sendFakeModifierEvents(int pos, Bool skip);
+
+  void cancelFakeModifierEvents();
+
+  Bool keyIsDown(KeyCode keycode);
+
+  void addKeyPressed(KeyCode received, KeyCode sent);
+
+  KeyCode getKeyPressed(KeyCode received);
+
+  void handleKeyboardEvent(Display *display, XEvent *);
+
+  void handleWebKeyboardEvent(KeySym keysym, Bool isKeyPress);
+
+  void handleMouseEvent(Display *, XEvent *);
+
+  void xtestInit(void);
+
+  void shmInit(void);
+
+  void randrInit(void);
+
+  void damageInit(void);
+
+  void handleRRScreenChangeNotify(XEvent *);
+
+  void handleDamageNotify(XEvent *);
+
+  void updateDamagedAreas(void);
+};
+
+int anyEventPredicate(Display *display, XEvent *event, XPointer parameter);
+
+#endif /* X11Poller_H */

nxcompshad/src/X11/include/XTest_nxcompshad.h

@@ -0,0 +1,71 @@
+/*
+
+Copyright 1992, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+#ifndef _XTEST_H_
+#define _XTEST_H_
+
+#include <nx-X11/Xfuncproto.h>
+
+_XFUNCPROTOBEGIN
+
+Bool XTestQueryExtension(
+    Display*		/* dpy */,
+    int*		/* event_basep */,
+    int*		/* error_basep */,
+    int*		/* majorp */,
+    int*		/* minorp */
+);
+
+extern int XTestFakeKeyEvent(
+    Display*		/* dpy */,
+    unsigned int	/* keycode */,
+    Bool		/* is_press */,
+    unsigned long	/* delay */
+);
+
+extern int XTestFakeButtonEvent(
+    Display*		/* dpy */,
+    unsigned int	/* button */,
+    Bool		/* is_press */,
+    unsigned long	/* delay */
+);
+
+extern int XTestFakeMotionEvent(
+    Display*		/* dpy */,
+    int			/* screen */,
+    int			/* x */,
+    int			/* y */,
+    unsigned long	/* delay */
+);
+
+extern int XTestGrabControl(
+    Display*		/* dpy */,
+    Bool		/* impervious */
+);
+
+_XFUNCPROTOEND
+
+#endif

nxcompshad/src/X11/include/Xdamage_nxcompshad.h

@@ -0,0 +1,92 @@
+/*
+ * Copyright © 2003 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This file is a reduced version of the header file of
+ * <X11/extensions/Xdamaga.h>
+ *
+ * This copy of code has been introduced to allow a clear namespace
+ * separation between <X11/...> and <nx-X11/...> header files.
+ *
+ * This version of the Xdamage library header file only contains symbols
+ * required by nxcompshad and strictly avoids indirectly including
+ * from an X11 library that is also shipped in nx-X11/lib/.
+ *
+ * When using <X11/extensions/Xdamage.h> instead for inclusion in
+ * nxcompshad, it will attempt pulling in the <X11/extensions/Xfixes.h>
+ * header which in turn will include <X11/Xlib.h>. However, the headers of
+ * the same name from <nx-X11/...> should be used instead.
+ *
+ * FIXME: Once the nxagent Xserver starts using libX11 from X.Org, this
+ * hack can be removed.
+ *
+ * 2015/06/26, Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
+ */
+
+
+#ifndef _XDAMAGE_H_
+#define _XDAMAGE_H_
+
+#include <X11/extensions/damagewire.h>
+#include <nx-X11/Xfuncproto.h>
+
+/* from <X11/extensions/Xfixes.h> */
+typedef XID XserverRegion;
+
+#define XDAMAGE_1_1_INTERFACE
+
+typedef XID Damage;
+
+typedef struct {
+    int type;			/* event base */
+    unsigned long serial;
+    Bool send_event;
+    Display *display;
+    Drawable drawable;
+    Damage damage;
+    int level;
+    Bool more;			/* more events will be delivered immediately */
+    Time timestamp;
+    XRectangle area;
+    XRectangle geometry;
+} XDamageNotifyEvent;
+
+_XFUNCPROTOBEGIN
+
+Bool XDamageQueryExtension (Display *dpy,
+                            int *event_base_return,
+                            int *error_base_return);
+
+Status XDamageQueryVersion (Display *dpy,
+			    int     *major_version_return,
+			    int     *minor_version_return);
+
+Damage
+XDamageCreate (Display	*dpy, Drawable drawable, int level);
+
+void
+XDamageSubtract (Display *dpy, Damage damage,
+		 XserverRegion repair, XserverRegion parts);
+
+_XFUNCPROTOEND
+
+#endif /* _XDAMAGE_H_ */

nxcompshad/src/X11/include/Xrandr_nxcompshad.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2000 Compaq Computer Corporation, Inc.
+ * Copyright © 2002 Hewlett-Packard Company, Inc.
+ * Copyright © 2006 Intel Corporation
+ * Copyright © 2008 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Author:  Jim Gettys, HP Labs, Hewlett-Packard, Inc.
+ *	    Keith Packard, Intel Corporation
+ */
+
+/*
+ * This file is a reduced version of the header file of
+ * <X11/extensions/Xrandr.h>
+ *
+ * This copy of code has been introduced to allow a clear namespace
+ * separation between <X11/...> and <nx-X11/...> header files.
+ *
+ * This version of the Xrandr library header file only contains symbols
+ * required by nxcompshad and strictly avoids indirectly including
+ * from an X11 library that is also shipped in nx-X11/lib/.
+ *
+ * When using <X11/extensions/Xrandr.h> instead for inclusion in
+ * nxcompshad, it will attempt pulling in the <X11/extensions/Xrender.h>
+ * header which in turn will include <X11/Xlib.h>. However, the headers of
+ * the same name from <nx-X11/...> should be used instead.
+ *
+ * FIXME: Once the nxagent Xserver starts using libXrender from X.Org, this
+ * hack can be removed.
+ *
+ * 2015/06/26, Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
+ */
+
+#ifndef _XRANDR_H_
+#define _XRANDR_H_
+
+/* from <X11/extensions/randr.h> */
+#define RRScreenChangeNotify		0
+#define RRScreenChangeNotifyMask	(1L << 0)
+
+#include <X11/Xfuncproto.h>
+
+_XFUNCPROTOBEGIN
+
+/* internal representation is private to the library */
+typedef struct _XRRScreenConfiguration XRRScreenConfiguration;
+
+Bool XRRQueryExtension (Display *dpy,
+			int *event_base_return,
+			int *error_base_return);
+
+void XRRSelectInput(Display *dpy, Window window, int mask);
+
+
+/*
+ * intended to take RRScreenChangeNotify,  or
+ * ConfigureNotify (on the root window)
+ * returns 1 if it is an event type it understands, 0 if not
+ */
+int XRRUpdateConfiguration(XEvent *event);
+_XFUNCPROTOEND
+
+#endif /* _XRANDR_H_ */