1 | /* $Id: display.cpp 44967 2013-03-11 09:07:46Z vboxsync $ */
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2 | /** @file
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3 | * X11 guest client - display management.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2012 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | /** @todo this should probably be replaced by something IPRT */
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19 | /* For system() and WEXITSTATUS() */
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20 | #include <stdlib.h>
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21 | #include <sys/types.h>
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22 | #include <sys/wait.h>
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23 | #include <errno.h>
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24 |
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25 | #include <X11/Xlib.h>
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26 | #include <X11/cursorfont.h>
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27 | #include <X11/extensions/Xrandr.h>
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28 |
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29 | #include <iprt/assert.h>
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30 | #include <iprt/err.h>
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31 | #include <iprt/file.h>
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32 | #include <iprt/string.h>
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33 | #include <iprt/thread.h>
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34 | #include <VBox/log.h>
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35 | #include <VBox/VMMDev.h>
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36 | #include <VBox/VBoxGuestLib.h>
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37 |
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38 | #include "VBoxClient.h"
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39 |
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40 | static int initDisplay(Display *pDisplay)
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41 | {
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42 | int rc = VINF_SUCCESS;
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43 | uint32_t fMouseFeatures = 0;
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44 |
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45 | LogRelFlowFunc(("testing dynamic resizing\n"));
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46 | int iDummy;
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47 | if (!XRRQueryExtension(pDisplay, &iDummy, &iDummy))
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48 | rc = VERR_NOT_SUPPORTED;
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49 | if (RT_SUCCESS(rc))
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50 | rc = VbglR3CtlFilterMask(VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST, 0);
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51 | else
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52 | VbglR3CtlFilterMask(0, VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST);
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53 | /* Log and ignore the return value, as there is not much we can do with
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54 | * it. */
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55 | LogRelFlowFunc(("dynamic resizing: result %Rrc\n", rc));
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56 | /* Enable support for switching between hardware and software cursors */
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57 | LogRelFlowFunc(("enabling relative mouse re-capturing support\n"));
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58 | rc = VbglR3GetMouseStatus(&fMouseFeatures, NULL, NULL);
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59 | if (RT_SUCCESS(rc))
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60 | {
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61 | rc = VbglR3CtlFilterMask(VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED,
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62 | 0);
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63 | if (RT_SUCCESS(rc))
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64 | rc = VbglR3SetMouseStatus
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65 | ( fMouseFeatures
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66 | & ~VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR);
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67 | }
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68 | if (RT_FAILURE(rc))
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69 | {
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70 | VbglR3CtlFilterMask(0, VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED);
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71 | VbglR3SetMouseStatus( fMouseFeatures
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72 | | VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR);
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73 | }
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74 | LogRelFlowFunc(("mouse re-capturing support: result %Rrc\n", rc));
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75 | return VINF_SUCCESS;
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76 | }
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77 |
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78 | void cleanupDisplay(void)
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79 | {
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80 | uint32_t fMouseFeatures = 0;
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81 | LogRelFlowFunc(("\n"));
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82 | VbglR3CtlFilterMask(0, VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST
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83 | | VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED);
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84 | int rc = VbglR3GetMouseStatus(&fMouseFeatures, NULL, NULL);
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85 | if (RT_SUCCESS(rc))
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86 | VbglR3SetMouseStatus( fMouseFeatures
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87 | | VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR);
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88 | LogRelFlowFunc(("returning\n"));
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89 | }
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90 |
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91 | /** This thread just runs a dummy X11 event loop to be sure that we get
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92 | * terminated should the X server exit. */
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93 | static int x11ConnectionMonitor(RTTHREAD, void *)
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94 | {
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95 | XEvent ev;
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96 | Display *pDisplay = XOpenDisplay(NULL);
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97 | while (true)
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98 | XNextEvent(pDisplay, &ev);
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99 | return 0;
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100 | }
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101 |
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102 | /**
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103 | * This method first resets the current resolution using RandR to wake up
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104 | * the graphics driver, then sets the resolution requested if it is among
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105 | * those offered by the driver.
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106 | */
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107 | static void setSize(Display *pDisplay, uint32_t cx, uint32_t cy)
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108 | {
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109 | XRRScreenConfiguration *pConfig;
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110 | XRRScreenSize *pSizes;
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111 | int cSizes;
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112 | pConfig = XRRGetScreenInfo(pDisplay, DefaultRootWindow(pDisplay));
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113 | /* Reset the current mode */
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114 | LogRelFlowFunc(("Setting size %ux%u\n", cx, cy));
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115 | if (pConfig)
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116 | {
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117 | pSizes = XRRConfigSizes(pConfig, &cSizes);
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118 | unsigned uDist = UINT32_MAX;
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119 | int iMode = -1;
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120 | for (int i = 0; i < cSizes; ++i)
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121 | {
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122 | #define VBCL_SQUARE(x) (x) * (x)
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123 | unsigned uThisDist = VBCL_SQUARE(pSizes[i].width - cx)
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124 | + VBCL_SQUARE(pSizes[i].height - cy);
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125 | LogRelFlowFunc(("Found size %dx%d, distance %u\n", pSizes[i].width,
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126 | pSizes[i].height, uThisDist));
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127 | #undef VBCL_SQUARE
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128 | if (uThisDist < uDist)
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129 | {
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130 | uDist = uThisDist;
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131 | iMode = i;
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132 | }
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133 | }
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134 | if (iMode >= 0)
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135 | {
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136 | Time config_timestamp = 0;
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137 | XRRConfigTimes(pConfig, &config_timestamp);
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138 | LogRelFlowFunc(("Setting new size %d\n", iMode));
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139 | XRRSetScreenConfig(pDisplay, pConfig,
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140 | DefaultRootWindow(pDisplay), iMode,
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141 | RR_Rotate_0, config_timestamp);
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142 | }
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143 | XRRFreeScreenConfigInfo(pConfig);
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144 | }
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145 | }
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146 |
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147 | /**
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148 | * Display change request monitor thread function.
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149 | * Before entering the loop, we re-read the last request
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150 | * received, and if the first one received inside the
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151 | * loop is identical we ignore it, because it is probably
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152 | * stale.
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153 | */
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154 | static int runDisplay(Display *pDisplay)
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155 | {
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156 | LogRelFlowFunc(("\n"));
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157 | Cursor hClockCursor = XCreateFontCursor(pDisplay, XC_watch);
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158 | Cursor hArrowCursor = XCreateFontCursor(pDisplay, XC_left_ptr);
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159 | int RRMaj, RRMin;
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160 | bool fExtDispReqSupport = true;
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161 | if (!XRRQueryVersion(pDisplay, &RRMaj, &RRMin))
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162 | RRMin = 0;
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163 | const char *pcszXrandr = "xrandr";
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164 | if (RTFileExists("/usr/X11/bin/xrandr"))
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165 | pcszXrandr = "/usr/X11/bin/xrandr";
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166 | int rc = RTThreadCreate(NULL, x11ConnectionMonitor, NULL, 0,
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167 | RTTHREADTYPE_INFREQUENT_POLLER, 0, "X11 monitor");
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168 | if (RT_FAILURE(rc))
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169 | return rc;
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170 | while (true)
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171 | {
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172 | uint32_t fEvents = 0, cx = 0, cy = 0, cBits = 0, iDisplay = 0, cxOrg = 0, cyOrg = 0;
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173 | bool fEnabled = false;
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174 | rc = VbglR3WaitEvent( VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST
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175 | | VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED,
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176 | RT_INDEFINITE_WAIT, &fEvents);
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177 | if (RT_FAILURE(rc) && rc != VERR_INTERRUPTED) /* VERR_NO_MEMORY? */
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178 | return rc;
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179 | /* Jiggle the mouse pointer to wake up the driver. */
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180 | XGrabPointer(pDisplay,
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181 | DefaultRootWindow(pDisplay), true, 0, GrabModeAsync,
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182 | GrabModeAsync, None, hClockCursor, CurrentTime);
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183 | XFlush(pDisplay);
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184 | XGrabPointer(pDisplay,
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185 | DefaultRootWindow(pDisplay), true, 0, GrabModeAsync,
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186 | GrabModeAsync, None, hArrowCursor, CurrentTime);
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187 | XFlush(pDisplay);
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188 | XUngrabPointer(pDisplay, CurrentTime);
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189 | XFlush(pDisplay);
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190 | /* And if it is a size hint, set the new size now that the video
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191 | * driver has had a chance to update its list. */
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192 | if (RT_SUCCESS(rc) && (fEvents & VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST))
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193 | {
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194 | int rc2 = VbglR3GetDisplayChangeRequestEx(&cx, &cy, &cBits,
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195 | &iDisplay, &cxOrg, &cyOrg, &fEnabled, true);
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196 | /* Extended display version not supported on host */
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197 | if (RT_FAILURE(rc2))
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198 | {
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199 | LogRel(("GetDisplayChangeReq Extended Version not supported. "
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200 | "Trying for Normal Mode with cx=%d & cy=%d\n", cx, cy));
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201 | fExtDispReqSupport = false;
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202 | rc2 = VbglR3GetDisplayChangeRequest(&cx, &cy, &cBits, &iDisplay, true);
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203 | }
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204 | else
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205 | LogRelFlowFunc(("Got Extended Param from Host cx=%d, cy=%d, bpp=%d, iDisp=%d, "
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206 | "OrgX=%d, OrgY=%d Enb=%d\n", cx, cy, cBits, iDisplay,
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207 | cxOrg, cyOrg, fEnabled));
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208 | /* If we are not stopping, sleep for a bit to avoid using up
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209 | too much CPU while retrying. */
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210 | if (RT_FAILURE(rc2))
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211 | RTThreadYield();
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212 | else
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213 | if (RRMin < 2)
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214 | setSize(pDisplay, cx, cy);
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215 | else
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216 | {
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217 | char szCommand[256];
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218 | if (fExtDispReqSupport)
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219 | {
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220 | if (fEnabled)
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221 | {
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222 | if (cx != 0 && cy != 0)
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223 | {
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224 | RTStrPrintf(szCommand, sizeof(szCommand),
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225 | "%s --output VBOX%u --set VBOX_MODE %dx%d",
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226 | pcszXrandr, iDisplay, cx, cy);
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227 | system(szCommand);
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228 | }
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229 | /* Extended Display support possible . Secondary monitor position supported */
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230 | if (cxOrg != 0 || cyOrg != 0)
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231 | {
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232 | RTStrPrintf(szCommand, sizeof(szCommand),
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233 | "%s --output VBOX%u --auto --pos %dx%d",
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234 | pcszXrandr, iDisplay, cxOrg, cyOrg);
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235 | system(szCommand);
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236 | }
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237 | RTStrPrintf(szCommand, sizeof(szCommand),
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238 | "%s --output VBOX%u --preferred",
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239 | pcszXrandr, iDisplay);
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240 | system(szCommand);
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241 | }
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242 | else /* disable the virtual monitor */
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243 | {
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244 | RTStrPrintf(szCommand, sizeof(szCommand),
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245 | "%s --output VBOX%u --off",
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246 | pcszXrandr, iDisplay);
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247 | system(szCommand);
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248 | }
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249 | }
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250 | else /* Extended display support not possible */
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251 | {
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252 | if (cx != 0 && cy != 0)
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253 | {
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254 | RTStrPrintf(szCommand, sizeof(szCommand),
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255 | "%s --output VBOX%u --set VBOX_MODE %dx%d",
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256 | pcszXrandr, iDisplay, cx, cy);
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257 | system(szCommand);
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258 | RTStrPrintf(szCommand, sizeof(szCommand),
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259 | "%s --output VBOX%u --preferred",
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260 | pcszXrandr, iDisplay);
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261 | system(szCommand);
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262 | }
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263 | }
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264 |
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265 | }
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266 | }
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267 | }
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268 | return VINF_SUCCESS;
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269 | }
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270 |
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271 | class DisplayService : public VBoxClient::Service
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272 | {
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273 | public:
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274 | virtual const char *getPidFilePath()
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275 | {
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276 | return ".vboxclient-display.pid";
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277 | }
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278 | virtual int run(bool fDaemonised /* = false */)
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279 | {
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280 | Display *pDisplay = XOpenDisplay(NULL);
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281 | if (!pDisplay)
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282 | return VERR_NOT_FOUND;
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283 | int rc = initDisplay(pDisplay);
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284 | if (RT_SUCCESS(rc))
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285 | rc = runDisplay(pDisplay);
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286 | XCloseDisplay(pDisplay);
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287 | return rc;
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288 | }
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289 | virtual void cleanup()
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290 | {
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291 | cleanupDisplay();
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292 | }
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293 | };
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294 |
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295 | VBoxClient::Service *VBoxClient::GetDisplayService()
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296 | {
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297 | return new DisplayService;
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298 | }
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