Tight PNG ? about novnc HOT 3 CLOSED

There are currently two VNC servers that support tightPNG: qemu-kvm and my fork of libvncserver. libvncserver is reportedly able to build on Windows however I suspect it would be a non-trivial task. qemu-kvm can run a Windows instance inside it but I don't think that's what you are after.

I would love to have tightPNG and WebSockets supported more broadly in VNC servers but it's unlikely that I will get time to do so anytime in the near future. This isn't really a noVNC specific feature so I'm going to close the issue. However, feel free to contact me if you or somebody you know is interested in porting the functionality. I would love to help but I can't personally drive the project.

from novnc.

Ok no problem, thanks !

I want just to use noVnc with a 'normal' VNC server (such as UltraVNC, TightVNC,...)

However, the performance is not very good (slow display), i tried using "Tight Encoder" => Is faster but I get an error ... :\

Fill Compression: OK
JPEG compression: OK
Palette Filter: PROBLEM (apparently noVnc is not compatible), and my framebuffer stop at 70% loading.

it is possible to use that "Tight Encoder" (JPEG) at 100% ?

(Sorry for my English)

Thanks in advance.

from novnc.

No, unfortunately for the moment any encoding that uses zlib is too slow to be usable. Javascript implementations are fast enough to do raw zlib decoding yet.

That was actually the reason why I developed the tightPNG encoding. It's very similar to tight but the zlib portions are replaced with PNG data (which can be handled by the browser directly).

I'm playing with a hack that might speed up zlib decompression sufficiently. That's tracked by this bug:

https://github.com/kanaka/noVNC/issues#issue/25

from novnc.