Avoid tearing in graphics display

Cross-platform BBS (ANSI) Terminal

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#143 Avoid tearing in graphics display

Milestone: NextMajor

Status: open

Owner: Stephen James Hurd

Labels: graphics (2)

Priority: 5

Updated: 2 hours ago

Created: 1 day ago

Creator: Rob Swindell

Private: No

I see this both in JXL and Sixel output, but interestingly, it's seems door (e.g. side-scroller) and possibly host or OS dependant (e.g. see it much more on doors running on cvs.synchro.net/Linux than vert.synchro.net/Windows) though my local capture of the transmitted door frames never contain the tearing. Note: SyncRetro (through which the NES roms currently play) only support Sixel, I had just experimented with JXL output to see if the tearing still occurred, and it did.

Super Mario Bros seems to be best example of this, particularly in the lower brick walk way.

3 Attachments

vlcsnap-2026-07-26-23h32m19s783.png

vlcsnap-2026-07-26-23h38m29s044.png

vlcsnap-2026-07-27-18h38m18s783.png

Discussion

Rob Swindell - 1 day ago

summary: Tearing in graphial display --> Tearing in graphics display
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Stephen James Hurd - 16 hours ago

Sixel tearing isn't really a surprise, but JXL is.

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Stephen James Hurd - 16 hours ago

It looks like GDI has no mechanism to avoid tearing.

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Rob Swindell - 6 hours ago

Attachments has changed:

Diff:

--- old +++ new @@ -1,2 +1,3 @@ vlcsnap-2026-07-26-23h32m19s783.png (196.2 kB; image/png) vlcsnap-2026-07-26-23h38m29s044.png (192.2 kB; image/png) +vlcsnap-2026-07-27-18h38m18s783.png (106.4 kB; image/png)
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Rob Swindell - 6 hours ago

In Wayland mode too

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Rob Swindell - 6 hours ago

in X11 mode too

vlcsnap-2026-07-27-18h44m41s860.png

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Stephen James Hurd - 2 hours ago

Ticket moved from /p/syncterm/tickets/274/

Can't be converted:

_output_type: Win32-GDI

_found_in_version: 1.10a
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Stephen James Hurd - 2 hours ago

summary: Tearing in graphics display --> Avoid tearing in graphics display

Priority: --> 5

Milestone: 1.10 --> NextMajor
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Stephen James Hurd - 2 hours ago

Interestingly, Wayland doesn't support tearing.

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