/**
* FreeRDP: A Remote Desktop Protocol Implementation
* X11 Monitor Handling
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2017 David Fort <contact@hardening-consulting.com>
* Copyright 2018 Kai Harms <kharms@rangee.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <winpr/crt.h>
#include <freerdp/log.h>
#define TAG CLIENT_TAG("x11")
#ifdef WITH_XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#ifdef WITH_XRANDR
#include <X11/extensions/Xrandr.h>
#include <X11/extensions/randr.h>
#if (RANDR_MAJOR * 100 + RANDR_MINOR) >= 105
#define USABLE_XRANDR
#endif
#endif
#include "xf_monitor.h"
/* See MSDN Section on Multiple Display Monitors: http://msdn.microsoft.com/en-us/library/dd145071
*/
int xf_list_monitors(xfContext* xfc)
{
Display* display;
int major, minor;
int i, nmonitors = 0;
display = XOpenDisplay(NULL);
if (!display)
{
WLog_ERR(TAG, "failed to open X display");
return -1;
}
#if defined(USABLE_XRANDR)
if (XRRQueryExtension(xfc->display, &major, &minor) &&
(XRRQueryVersion(xfc->display, &major, &minor) == True) && (major * 100 + minor >= 105))
{
XRRMonitorInfo* monitors =
XRRGetMonitors(xfc->display, DefaultRootWindow(xfc->display), 1, &nmonitors);
for (i = 0; i < nmonitors; i++)
{
printf(" %s [%d] %dx%d\t+%d+%d\n", monitors[i].primary ? "*" : " ", i,
monitors[i].width, monitors[i].height, monitors[i].x, monitors[i].y);
}
XRRFreeMonitors(monitors);
}
else
#endif
#ifdef WITH_XINERAMA
if (XineramaQueryExtension(display, &major, &minor))
{
if (XineramaIsActive(display))
{
XineramaScreenInfo* screen = XineramaQueryScreens(display, &nmonitors);
for (i = 0; i < nmonitors; i++)
{
printf(" %s [%d] %hdx%hd\t+%hd+%hd\n", (i == 0) ? "*" : " ", i,
screen[i].width, screen[i].height, screen[i].x_org, screen[i].y_org);
}
XFree(screen);
}
}
else
#else
{
Screen* screen = ScreenOfDisplay(display, DefaultScreen(display));
printf(" * [0] %dx%d\t+0+0\n", WidthOfScreen(screen), HeightOfScreen(screen));
}
#endif
XCloseDisplay(display);
return 0;
}
static BOOL xf_is_monitor_id_active(xfContext* xfc, UINT32 id)
{
UINT32 index;
rdpSettings* settings = xfc->context.settings;
if (!settings->NumMonitorIds)
return TRUE;
for (index = 0; index < settings->NumMonitorIds; index++)
{
if (settings->MonitorIds[index] == id)
return TRUE;
}
return FALSE;
}
BOOL xf_detect_monitors(xfContext* xfc, UINT32* pMaxWidth, UINT32* pMaxHeight)
{
int nmonitors = 0;
int monitor_index = 0;
BOOL primaryMonitorFound = FALSE;
VIRTUAL_SCREEN* vscreen;
rdpSettings* settings;
int mouse_x, mouse_y, _dummy_i;
Window _dummy_w;
int current_monitor = 0;
Screen* screen;
MONITOR_INFO* monitor;
#if defined WITH_XINERAMA || defined WITH_XRANDR
int major, minor;
#endif
#if defined(USABLE_XRANDR)
XRRMonitorInfo* rrmonitors = NULL;
BOOL useXRandr = FALSE;
#endif
if (!xfc || !pMaxWidth || !pMaxHeight || !xfc->context.settings)
return FALSE;
settings = xfc->context.settings;
vscreen = &xfc->vscreen;
*pMaxWidth = settings->DesktopWidth;
*pMaxHeight = settings->DesktopHeight;
/* get mouse location */
if (!XQueryPointer(xfc->display, DefaultRootWindow(xfc->display), &_dummy_w, &_dummy_w,
&mouse_x, &mouse_y, &_dummy_i, &_dummy_i, (void*)&_dummy_i))
mouse_x = mouse_y = 0;
#if defined(USABLE_XRANDR)
if (XRRQueryExtension(xfc->display, &major, &minor) &&
(XRRQueryVersion(xfc->display, &major, &minor) == True) && (major * 100 + minor >= 105))
{
XRRMonitorInfo* rrmonitors =
XRRGetMonitors(xfc->display, DefaultRootWindow(xfc->display), 1, &vscreen->nmonitors);
if (vscreen->nmonitors > 16)
vscreen->nmonitors = 0;
if (vscreen->nmonitors)
{
int i;
for (i = 0; i < vscreen->nmonitors; i++)
{
vscreen->monitors[i].area.left = rrmonitors[i].x;
vscreen->monitors[i].area.top = rrmonitors[i].y;
vscreen->monitors[i].area.right = rrmonitors[i].x + rrmonitors[i].width - 1;
vscreen->monitors[i].area.bottom = rrmonitors[i].y + rrmonitors[i].height - 1;
vscreen->monitors[i].primary = rrmonitors[i].primary > 0;
}
}
XRRFreeMonitors(rrmonitors);
useXRandr = TRUE;
}
else
#endif
#ifdef WITH_XINERAMA
if (XineramaQueryExtension(xfc->display, &major, &minor) && XineramaIsActive(xfc->display))
{
XineramaScreenInfo* screenInfo = XineramaQueryScreens(xfc->display, &vscreen->nmonitors);
if (vscreen->nmonitors > 16)
vscreen->nmonitors = 0;
if (vscreen->nmonitors)
{
int i;
for (i = 0; i < vscreen->nmonitors; i++)
{
vscreen->monitors[i].area.left = screenInfo[i].x_org;
vscreen->monitors[i].area.top = screenInfo[i].y_org;
vscreen->monitors[i].area.right = screenInfo[i].x_org + screenInfo[i].width - 1;
vscreen->monitors[i].area.bottom = screenInfo[i].y_org + screenInfo[i].height - 1;
}
}
XFree(screenInfo);
}
#endif
xfc->fullscreenMonitors.top = xfc->fullscreenMonitors.bottom = xfc->fullscreenMonitors.left =
xfc->fullscreenMonitors.right = 0;
/* Determine which monitor that the mouse cursor is on */
if (vscreen->monitors)
{
int i;
for (i = 0; i < vscreen->nmonitors; i++)
{
if ((mouse_x >= vscreen->monitors[i].area.left) &&
(mouse_x <= vscreen->monitors[i].area.right) &&
(mouse_y >= vscreen->monitors[i].area.top) &&
(mouse_y <= vscreen->monitors[i].area.bottom))
{
current_monitor = i;
break;
}
}
}
/*
Even for a single monitor, we need to calculate the virtual screen to support
window managers that do not implement all X window state hints.
If the user did not request multiple monitor or is using workarea
without remote app, we force the number of monitors be 1 so later
the rest of the client don't end up using more monitors than the user desires.
*/
if ((!settings->UseMultimon && !settings->SpanMonitors) ||
(settings->Workarea && !settings->RemoteApplicationMode))
{
/* If no monitors were specified on the command-line then set the current monitor as active
*/
if (!settings->NumMonitorIds)
{
settings->MonitorIds[0] = current_monitor;
}
/* Always sets number of monitors from command-line to just 1.
* If the monitor is invalid then we will default back to current monitor
* later as a fallback. So, there is no need to validate command-line entry here.
*/
settings->NumMonitorIds = 1;
}
/* WORKAROUND: With Remote Application Mode - using NET_WM_WORKAREA
* causes issues with the ability to fully size the window vertically
* (the bottom of the window area is never updated). So, we just set
* the workArea to match the full Screen width/height.
*/
if (settings->RemoteApplicationMode || !xf_GetWorkArea(xfc))
{
/*
if only 1 monitor is enabled, use monitor area
this is required in case of a screen composed of more than one monitor
but user did not enable multimonitor
*/
if ((settings->NumMonitorIds == 1) && (vscreen->nmonitors > current_monitor))
{
monitor = vscreen->monitors + current_monitor;
if (!monitor)
return FALSE;
xfc->workArea.x = monitor->area.left;
xfc->workArea.y = monitor->area.top;
xfc->workArea.width = monitor->area.right - monitor->area.left + 1;
xfc->workArea.height = monitor->area.bottom - monitor->area.top + 1;
}
else
{
xfc->workArea.x = 0;
xfc->workArea.y = 0;
xfc->workArea.width = WidthOfScreen(xfc->screen);
xfc->workArea.height = HeightOfScreen(xfc->screen);
}
}
if (settings->Fullscreen)
{
*pMaxWidth = WidthOfScreen(xfc->screen);
*pMaxHeight = HeightOfScreen(xfc->screen);
}
else if (settings->Workarea)
{
*pMaxWidth = xfc->workArea.width;
*pMaxHeight = xfc->workArea.height;
}
else if (settings->PercentScreen)
{
/* If we have specific monitor information then limit the PercentScreen value
* to only affect the current monitor vs. the entire desktop
*/
if (vscreen->nmonitors > 0)
{
if (!vscreen->monitors)
return FALSE;
*pMaxWidth = vscreen->monitors[current_monitor].area.right -
vscreen->monitors[current_monitor].area.left + 1;
*pMaxHeight = vscreen->monitors[current_monitor].area.bottom -
vscreen->monitors[current_monitor].area.top + 1;
if (settings->PercentScreenUseWidth)
*pMaxWidth = ((vscreen->monitors[current_monitor].area.right -
vscreen->monitors[current_monitor].area.left + 1) *
settings->PercentScreen) /
100;
if (settings->PercentScreenUseHeight)
*pMaxHeight = ((vscreen->monitors[current_monitor].area.bottom -
vscreen->monitors[current_monitor].area.top + 1) *
settings->PercentScreen) /
100;
}
else
{
*pMaxWidth = xfc->workArea.width;
*pMaxHeight = xfc->workArea.height;
if (settings->PercentScreenUseWidth)
*pMaxWidth = (xfc->workArea.width * settings->PercentScreen) / 100;
if (settings->PercentScreenUseHeight)
*pMaxHeight = (xfc->workArea.height * settings->PercentScreen) / 100;
}
}
else if (settings->DesktopWidth && settings->DesktopHeight)
{
*pMaxWidth = settings->DesktopWidth;
*pMaxHeight = settings->DesktopHeight;
}
/* Create array of all active monitors by taking into account monitors requested on the
* command-line */
{
int i;
for (i = 0; i < vscreen->nmonitors; i++)
{
MONITOR_ATTRIBUTES* attrs;
if (!xf_is_monitor_id_active(xfc, (UINT32)i))
continue;
if (!vscreen->monitors)
return FALSE;
settings->MonitorDefArray[nmonitors].x =
(vscreen->monitors[i].area.left *
(settings->PercentScreenUseWidth ? settings->PercentScreen : 100)) /
100;
settings->MonitorDefArray[nmonitors].y =
(vscreen->monitors[i].area.top *
(settings->PercentScreenUseHeight ? settings->PercentScreen : 100)) /
100;
settings->MonitorDefArray[nmonitors].width =
((vscreen->monitors[i].area.right - vscreen->monitors[i].area.left + 1) *
(settings->PercentScreenUseWidth ? settings->PercentScreen : 100)) /
100;
settings->MonitorDefArray[nmonitors].height =
((vscreen->monitors[i].area.bottom - vscreen->monitors[i].area.top + 1) *
(settings->PercentScreenUseWidth ? settings->PercentScreen : 100)) /
100;
settings->MonitorDefArray[nmonitors].orig_screen = i;
#ifdef USABLE_XRANDR
if (useXRandr && rrmonitors)
{
Rotation rot, ret;
attrs = &settings->MonitorDefArray[nmonitors].attributes;
attrs->physicalWidth = rrmonitors[i].mwidth;
attrs->physicalHeight = rrmonitors[i].mheight;
ret = XRRRotations(xfc->display, i, &rot);
attrs->orientation = rot;
}
#endif
if ((UINT32)i == settings->MonitorIds[0])
{
settings->MonitorDefArray[nmonitors].is_primary = TRUE;
settings->MonitorLocalShiftX = settings->MonitorDefArray[nmonitors].x;
settings->MonitorLocalShiftY = settings->MonitorDefArray[nmonitors].y;
primaryMonitorFound = TRUE;
}
nmonitors++;
}
}
/* If no monitor is active(bogus command-line monitor specification) - then lets try to fallback
* to go fullscreen on the current monitor only */
if (nmonitors == 0 && vscreen->nmonitors > 0)
{
INT32 width, height;
if (!vscreen->monitors)
return FALSE;
width = vscreen->monitors[current_monitor].area.right -
vscreen->monitors[current_monitor].area.left + 1L;
height = vscreen->monitors[current_monitor].area.bottom -
vscreen->monitors[current_monitor].area.top + 1L;
settings->MonitorDefArray[0].x = vscreen->monitors[current_monitor].area.left;
settings->MonitorDefArray[0].y = vscreen->monitors[current_monitor].area.top;
settings->MonitorDefArray[0].width = MIN(width, (INT64)(*pMaxWidth));
settings->MonitorDefArray[0].height = MIN(height, (INT64)(*pMaxHeight));
settings->MonitorDefArray[0].orig_screen = current_monitor;
nmonitors = 1;
}
settings->MonitorCount = nmonitors;
/* If we have specific monitor information */
if (settings->MonitorCount)
{
UINT32 i;
/* Initialize bounding rectangle for all monitors */
int vX = settings->MonitorDefArray[0].x;
int vY = settings->MonitorDefArray[0].y;
int vR = vX + settings->MonitorDefArray[0].width;
int vB = vY + settings->MonitorDefArray[0].height;
xfc->fullscreenMonitors.top = xfc->fullscreenMonitors.bottom =
xfc->fullscreenMonitors.left = xfc->fullscreenMonitors.right =
settings->MonitorDefArray[0].orig_screen;
/* Calculate bounding rectangle around all monitors to be used AND
* also set the Xinerama indices which define left/top/right/bottom monitors.
*/
for (i = 1; i < settings->MonitorCount; i++)
{
/* does the same as gdk_rectangle_union */
int destX = MIN(vX, settings->MonitorDefArray[i].x);
int destY = MIN(vY, settings->MonitorDefArray[i].y);
int destR =
MAX(vR, settings->MonitorDefArray[i].x + settings->MonitorDefArray[i].width);
int destB =
MAX(vB, settings->MonitorDefArray[i].y + settings->MonitorDefArray[i].height);
if (vX != destX)
xfc->fullscreenMonitors.left = settings->MonitorDefArray[i].orig_screen;
if (vY != destY)
xfc->fullscreenMonitors.top = settings->MonitorDefArray[i].orig_screen;
if (vR != destR)
xfc->fullscreenMonitors.right = settings->MonitorDefArray[i].orig_screen;
if (vB != destB)
xfc->fullscreenMonitors.bottom = settings->MonitorDefArray[i].orig_screen;
vX = destX / ((settings->PercentScreenUseWidth ? settings->PercentScreen : 100) / 100.);
vY =
destY / ((settings->PercentScreenUseHeight ? settings->PercentScreen : 100) / 100.);
vR = destR / ((settings->PercentScreenUseWidth ? settings->PercentScreen : 100) / 100.);
vB =
destB / ((settings->PercentScreenUseHeight ? settings->PercentScreen : 100) / 100.);
}
vscreen->area.left = 0;
vscreen->area.right = vR - vX - 1;
vscreen->area.top = 0;
vscreen->area.bottom = vB - vY - 1;
if (settings->Workarea)
{
vscreen->area.top = xfc->workArea.y;
vscreen->area.bottom = xfc->workArea.height + xfc->workArea.y - 1;
}
if (!primaryMonitorFound)
{
/* If we have a command line setting we should use it */
if (settings->NumMonitorIds)
{
/* The first monitor is the first in the setting which should be used */
monitor_index = settings->MonitorIds[0];
}
else
{
/* This is the same as when we would trust the Xinerama results..
and set the monitor index to zero.
The monitor listed with /monitor-list on index zero is always the primary
*/
screen = DefaultScreenOfDisplay(xfc->display);
monitor_index = XScreenNumberOfScreen(screen);
}
int j = monitor_index;
/* If the "default" monitor is not 0,0 use it */
if (settings->MonitorDefArray[j].x != 0 || settings->MonitorDefArray[j].y != 0)
{
settings->MonitorDefArray[j].is_primary = TRUE;
settings->MonitorLocalShiftX = settings->MonitorDefArray[j].x;
settings->MonitorLocalShiftY = settings->MonitorDefArray[j].y;
primaryMonitorFound = TRUE;
}
else
{
/* Lets try to see if there is a monitor with a 0,0 coordinate and use it as a
* fallback*/
for (i = 0; i < settings->MonitorCount; i++)
{
if (!primaryMonitorFound && settings->MonitorDefArray[i].x == 0 &&
settings->MonitorDefArray[i].y == 0)
{
settings->MonitorDefArray[i].is_primary = TRUE;
settings->MonitorLocalShiftX = settings->MonitorDefArray[i].x;
settings->MonitorLocalShiftY = settings->MonitorDefArray[i].y;
primaryMonitorFound = TRUE;
}
}
}
}
/* Subtract monitor shift from monitor variables for server-side use.
* We maintain monitor shift value as Window requires the primary monitor to have a
* coordinate of 0,0 In some X configurations, no monitor may have a coordinate of 0,0. This
* can also be happen if the user requests specific monitors from the command-line as well.
* So, we make sure to translate our primary monitor's upper-left corner to 0,0 on the
* server.
*/
for (i = 0; i < settings->MonitorCount; i++)
{
settings->MonitorDefArray[i].x =
settings->MonitorDefArray[i].x - settings->MonitorLocalShiftX;
settings->MonitorDefArray[i].y =
settings->MonitorDefArray[i].y - settings->MonitorLocalShiftY;
}
/* Set the desktop width and height according to the bounding rectangle around the active
* monitors */
*pMaxWidth = MIN(*pMaxWidth, (UINT32)vscreen->area.right - vscreen->area.left + 1);
*pMaxHeight = MIN(*pMaxHeight, (UINT32)vscreen->area.bottom - vscreen->area.top + 1);
}
/* some 2008 server freeze at logon if we announce support for monitor layout PDU with
* #monitors < 2. So let's announce it only if we have more than 1 monitor.
*/
if (settings->MonitorCount)
settings->SupportMonitorLayoutPdu = TRUE;
#ifdef USABLE_XRANDR
if (rrmonitors)
XRRFreeMonitors(rrmonitors);
#endif
return TRUE;
}