<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="#954F72" style="word-wrap:break-word"> <div class="WordSection1"> <o:p> </o:p> <o:p> </o:p> <div style="mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:ddeyo@tireprofiles.com">David Deyo</a> Sent: Monday, August 2, 2021 3:53 PM To: <a href="mailto:ppaalanen@gmail.com">Pekka Paalanen</a> Subject: RE: xrandr and xwayland </div> <o:p> </o:p> On Fri, 30 Jul 2021 23:30:38 +0100<o:p></o:p> Carsten Haitzler <raster@rasterman.com> wrote:<o:p></o:p> <o:p> </o:p> > On Fri, 30 Jul 2021 16:28:02 +0000 David Deyo <ddeyo@tireprofiles.com> said:<o:p></o:p> > <o:p></o:p> > No - this is up to the compositor itself to do in its own internal ways. Far<o:p></o:p> > too many abuses have happened over the years with xrandr available to any<o:p></o:p> > client anywhere. While in theory a wayland compositor could create an extension<o:p></o:p> > that works like xrandr, it'd be problematic to make it general-access like<o:p></o:p> > xrandr.<o:p></o:p> <o:p> </o:p> >>>Indeed.<o:p></o:p> <o:p> </o:p> > > <o:p></o:p> > > Hello everyone,<o:p></o:p> > > <o:p></o:p> > > I need to rotate my screen 90 degrees and back to normal in xwayland on an<o:p></o:p> > > iMX8 running gatesgarth distro.<o:p></o:p> <o:p> </o:p> >>>Maybe you could explain your top-level use case for this, and the<o:p></o:p> >>>general system architecture (which relevant programs are running and<o:p></o:p> >>>what their responsibilities are)?<o:p></o:p> <o:p> </o:p> Distro:<o:p></o:p> I am working on a product that our company is creating. It uses an imx8 som from Boundary. The system is not a normal desktop.<o:p></o:p> The DISTRO is created by yocto using the gatesgarth branch. Just recently we were notified that Xwayland was working, so I don’t expect we will be removing it just yet.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Use case:<o:p></o:p> We will have a kiosk-looking desktop. Some of our pages will have the option for the end user to enter text from an on-screen keyboard.<o:p></o:p> <div> Since our display will be so small (68.04mm (2.68") x 120.96mm (4.76")), we will have to turn our unit sideways to make the keyboard fit. We have already done this on a smaller screen (1.0).<o:p></o:p> </div> On our 1.0 product, we used Segger as our graphics library. Compared to Android, and the like, it seems like rotating the screen would be a standard capability.<o:p></o:p> <o:p> </o:p> I believe our compositor (Weston) can do it, transform=90, but to use this method, it has to be restarted; causing our gui app to crash and lose all entered data.<o:p></o:p> The client probably needs to drive the orientation. Considering our gui will likely be in python3/tkinter, I will need some way create a page and rotate the display.<o:p></o:p> <o:p> </o:p> I am somewhat limited by the packages available to me in my distro.<o:p></o:p> <o:p> </o:p> Thanks,<o:p></o:p> <o:p> </o:p> -dwd<o:p></o:p> <o:p> </o:p> <o:p> </o:p> >>>Quite likely the solution will start by removing Xwayland from the<o:p></o:p> >>>equation, and to have the compositor you use to automatically apply<o:p></o:p> >>>that rotation when needed, but how to achieve that depends on your use<o:p></o:p> >>>case. Can the compositor do it all on its own, does the client need to<o:p></o:p> >>>synchronise to the orientation change, does the client need to drive<o:p></o:p> >>>the orientation change, etc.<o:p></o:p> <o:p> </o:p> >>>Also sounds like this might not be a normal desktop system you are<o:p></o:p> >>>working on, which means you have more options on how to design this<o:p></o:p> >>>than on normal desktop systems with arbitrary applications.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> >>>Thanks,<o:p></o:p> >>>pq<o:p></o:p> <o:p> </o:p> > > <o:p></o:p> > > Does anyone know if xrandr can be coerced/modified to make rotations work?<o:p></o:p> > > I’m in the middle of xserver, libX11, libxrandr and xrandr source.<o:p></o:p> > > <o:p></o:p> > > How would a client communicating to Xwayland as the xserver request a<o:p></o:p> > > rotation? Does Xwayland listen to a unix socket and pass commands on to the<o:p></o:p> > > kernel?<o:p></o:p> > > <o:p></o:p> > > (Thanks Hans,)<o:p></o:p> > > <o:p></o:p> > > -dwd<o:p></o:p> > > David<o:p></o:p> <o:p> </o:p> <o:p> </o:p> David Deyo<o:p></o:p> <table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" style="margin-left:.15in;border-collapse:collapse"> <tbody> <tr> <td width="150" valign="top" style="width:112.5pt;padding:0in 5.4pt 0in 5.4pt"> <img border="0" width="170" height="82" style="width:1.7708in;height:.8541in" id="Picture_x0020_3" src="cid:image003.png@01D787B6.7E306F20"><o:p></o:p> </td> <td width="474" valign="top" style="width:355.5pt;padding:0in 5.4pt 0in 5.4pt"> <o:p></o:p> Firmware Engineer <o:p></o:p> TPI- Tire Profiles<o:p></o:p> O: 214-396-3063<o:p></o:p> E: <a href="mailto:ddeyo@tireprofiles.com">ddeyo@tireprofiles.com</a> | W: <a href="http://www.tireprofiles.com/" target="_blank">www.tireprofiles.com</a><o:p></o:p> A: 3010 Story Rd W, Irving, TX 75038<o:p></o:p> </td> </tr> </tbody> </table> <o:p> </o:p> <o:p> </o:p> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:ppaalanen@gmail.com">Pekka Paalanen</a> Sent: Monday, August 2, 2021 3:54 AM To: <a href="mailto:ddeyo@tireprofiles.com">David Deyo</a> Cc: <a href="mailto:raster@rasterman.com">Carsten Haitzler</a>; <a href="mailto:wayland-devel@lists.freedesktop.org"> wayland-devel@lists.freedesktop.org</a> Subject: Re: xrandr and xwayland<o:p></o:p> </div> <o:p> </o:p> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> </div> </body> </html>