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X11::Xlib::Screen(3) User Contributed Perl Documentation X11::Xlib::Screen(3)

X11::Xlib::Screen - Convenience wrapper around Display+ScreenID

In ancient history, a "Screen" represented one physical graphics device + monitor. Now days there tends to be only one per system, with multiple monitors or displays aggregated into a single screen using Xinerama or XRandR. This was mostly caused by the annoying restriction that graphic resources (i.e. windows) are bound to a single screen.
The short of that story is that "$display->screen_count" and "$screen->width" etc don't do what a person might expect them to do. If you want to know about the boundaries of physical monitors you'll need the yet-unwritten "X11::Xlib::Monitor" objects provided by a future wrapper around Xinerama or XRandR.

Reference to X11::Xlib::Display

The integer identifying this screen.

Width in pixels

Height in pixels

Physical width in millimeters.

Physical height in millimeters.

Color depth of the RootWindow of this screen.

The XID of the root window of this screen

The X11::Xlib::Window object for the root window of this screen

The default visual of this screen

  my $vinfo= $screen->visual_info();  # uses defualt visual for this screen
  my $vinfo= $screen->visual_info($visual);
  my $vinfo= $screen->visual_info($visual_id);
Shortcut to "visual_info" in X11::Xlib::Display, but using this screen's default visual when no argument is given.

  my $vinfo= $screen->match_visual_info($depth, $class);
Like "match_visual_info" in X11::Xlib::Display but with an implied $screen argument.

Olivier Thauvin, <>
Michael Conrad, <>

Copyright (C) 2009-2010 by Olivier Thauvin
Copyright (C) 2017 by Michael Conrad
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available.
2018-06-06 perl v5.28.1

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