aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/programs/Xserver/hw/nxagent/Composite.c
blob: 4cdcda9df939538231d15c20eb225a928028cda6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/**************************************************************************/
/*                                                                        */
/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
/* Copyright (c) 2008-2014 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
/* Copyright (c) 2011-2016 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
/* Copyright (c) 2014-2016 Mihai Moldovan <ionic@ionic.de>                */
/* Copyright (c) 2014-2016 Ulrich Sibiller <uli42@gmx.de>                 */
/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
/*                                                                        */
/* NXAGENT, 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.                                          */
/*                                                                        */
/**************************************************************************/

#include "scrnintstr.h"
#include "windowstr.h"

#include "Agent.h"
#include "Screen.h"
#include "Display.h"
#include "Options.h"
#include "Windows.h"

#include "X11/include/Xcomposite_nxagent.h"

/*
 * Set here the required log level.
 */

#define PANIC
#define WARNING
#undef  TEST
#undef  DEBUG

/*
 * Set if the composite extension is supported
 * by the remote display.
 */

int nxagentCompositeEnable = UNDEFINED;

void nxagentCompositeExtensionInit(void)
{
  /*
   * Set the flag only if the initialization
   * completes.
   */

  nxagentCompositeEnable = 0;

  if (nxagentOption(Composite))
  {
    int eventBase, errorBase;

    #ifdef TEST
    fprintf(stderr, "nxagentCompositeExtensionInit: Checking if the composite extension is supported.\n");
    #endif

    if (XCompositeQueryExtension(nxagentDisplay, &eventBase, &errorBase) == 1)
    {
      /*
       * At the moment we don't need to care
       * the version of the extension.
       */

      #ifdef TEST

      int major = -1;
      int minor = -1;

      XCompositeQueryVersion(nxagentDisplay, &major, &minor);

      fprintf(stderr, "nxagentCompositeExtensionInit: The remote display supports version [%d] "
                  "minor [%d].\n", major, minor);

      if (major < 0 || minor < 2)
      {
        #ifdef WARNING
        fprintf(stderr, "nxagentCompositeExtensionInit: WARNING! Potentially incompatible version "
                    "[%d] minor [%d] detected.\n", major, minor);
        #endif
      }

      #endif

      #ifdef TEST
      fprintf(stderr, "nxagentCompositeExtensionInit: Enabling the use of the composite extension.\n");
      #endif

      nxagentCompositeEnable = 1;
    }
    #ifdef TEST
    else
    {
      fprintf(stderr, "nxagentCompositeExtensionInit: Composite extension not supported on this display.\n");
    }
    #endif
  }
  #ifdef TEST
  else
  {
    fprintf(stderr, "nxagentCompositeExtensionInit: Use of the composite extension not enabled.\n");
  }
  #endif
}

void nxagentRedirectDefaultWindows(void)
{
  int i;

  if (nxagentOption(Rootless) ||
          nxagentCompositeEnable == 0)
  {
    #ifdef TEST
    fprintf(stderr, "nxagentRedirectDefaultWindows: Not redirecting default "
                "windows with rootless mode [%d] and composite [%d].\n",
                    nxagentOption(Rootless), nxagentCompositeEnable);
    #endif

    return;
  }

  for (i = 0; i < screenInfo.numScreens; i++)
  {
    WindowPtr pWin = screenInfo.screens[i]->root;

    ScreenPtr pScreen = pWin -> drawable.pScreen;

    #ifdef TEST
    fprintf(stderr, "nxagentRedirectDefaultWindows: WARNING! Redirecting default window id [%ld] "
                "to off-screen memory.\n", (long int)nxagentDefaultWindows[pScreen->myNum]);
    #endif

    /*
     * When trying to redirect only the top level window,
     * and not the subwindows, we incur in a strange be-
     * haviour. The top level is unmapped, mapped, unmap-
     * ped and then reparented. This at first makes the
     * agent think that the window manager is gone, then
     * the agent window disappears. To make thinks even
     * more weird, this happens only at reconnection.
     */
 
    XCompositeRedirectSubwindows(nxagentDisplay, nxagentDefaultWindows[pScreen->myNum],
                                     CompositeRedirectAutomatic);
  }
}

void nxagentRedirectWindow(WindowPtr pWin)
{
  if (!nxagentOption(Rootless) ||
          nxagentCompositeEnable == 0)
  {
    #ifdef TEST
    fprintf(stderr, "nxagentRedirectWindow: Not redirecting window id [%ld] "
                "to off-screen memory with rootless mode [%d] and composite [%d].\n",
                    nxagentWindow(pWin), nxagentOption(Rootless),
                        nxagentCompositeEnable);
    #endif

    return;
  }

  #ifdef TEST
  fprintf(stderr, "nxagentRedirectWindow: WARNING! Redirecting window id [%ld] "
              "to off-screen memory.\n", (long int)nxagentWindow(pWin));
  #endif

  XCompositeRedirectWindow(nxagentDisplay, nxagentWindow(pWin),
                               CompositeRedirectAutomatic);

  nxagentWindowPriv(pWin) -> isRedirected = 1;
}

void nxagentUnredirectWindow(WindowPtr pWin)
{
  if (nxagentWindowPriv(pWin) -> isRedirected == 1)
  {
    #ifdef TEST
    fprintf(stderr, "nxagentUnredirectWindow: Disabling redirection of window id [%ld] "
                "to off-screen memory.\n", nxagentWindow(pWin));
    #endif

    XCompositeUnredirectWindow(nxagentDisplay, nxagentWindow(pWin),
                                   CompositeRedirectAutomatic);

    nxagentWindowPriv(pWin) -> isRedirected = 0;
  }
  #ifdef WARNING
  else
  {
    fprintf(stderr, "nxagentUnredirectWindow: WARNING! The window id [%ld] "
                "was not redirected.\n", (long int)nxagentWindow(pWin));
  }
  #endif
}