Drobe :: The archives
About Drobe | Contact | RSS | Twitter | Tech docs | Downloads | BBC Micro

Geminus graphics acceleration in beta

By Chris Williams. Published: 9th Nov 2005, 11:59:29 | Permalink | Printable

Put your foot down

Feel the speedTrue to their word, Spellings Software have publically released a beta version of the Geminus graphics acceleration driver this week. Those who paid for the upgrade can now test drive the features, which include hardware accelerated sprite and line plotting.

Using the Iyonix's Nvidia GeForce 2 graphics card, window redraw operations are cached so future plots happen instantaneously - more details on the benefits of the hardware acceleration support are in the South East show report. The overall effect is that the desktop should become faster to use and more efficient. One Geminus user described the release as "terrific".

Geminus, developed by Aemulor author Adrian Lees, also supports multiple screens and rotated displays.


Spellings Software website - a demo version is available too

Previous: The story behind RiScript 5
Next: Archive usage survey: VRPC edges past Iyonix


Viewing threaded comments | View comments unthreaded, listed by date | Skip to the end

Is there a resolution limit? ISTR 1280 x 1024 was mentioned somewhere previously.

 is a RISC OS Userbucksboy on 9/11/05 12:36PM
[ Reply | Permalink | Report ]

Not for the acceleration code, no. The multi-screen and rotation features constrain the widths to certain values.(256n pixels)

 is a RISC OS Useradrianl on 9/11/05 12:46PM
[ Reply | Permalink | Report ]

Every Iyonix owner should get the acceleration driver - it is that good!

 is a RISC OS UserROHC on 9/11/05 1:23PM
[ Reply | Permalink | Report ]

It certainly does what it says on the tin.....

 is a RISC OS Usermarkee174 on 9/11/05 5:50PM
[ Reply | Permalink | Report ]

:-) :-) :-) Worth every penny!!! Thanks, Guys!

 is a RISC OS Useroldstuts on 10/11/05 9:19AM
[ Reply | Permalink | Report ]

Dragging large jpegs is notably smoother (my standard graphics mode is 1376x1024x16M). The demo is very professionally presented and easy to use. Impressive stuff!

 is a RISC OS UserGavinWraith on 12/11/05 11:13AM
[ Reply | Permalink | Report ]

I'm not convinced that it's doing what it says it should do on my Iyonix.

Artworks' apple still takes the usual amount of time to redraw when dragged around the screen, PDFs scroll up and down like treacle, and F12-return is still something to avoid showing your cynical GeForce 7800-owning mates. There's a very slight increase in speed when filling in the rectangles of the screen using RDesktop but that could just be my own perception.

Adjust-clicking to toggle on and off has no noticeable effect except for possibly with RDesktop.

 is a RISC OS Usertamias on 12/11/05 1:21PM
[ Reply | Permalink | Report ]

tamias: Scrolling application windows is something that wont get cached as Geminus has no way of knowing whats going to be plotted in the new part of the workarea you have just exposed by scrolling. We can only accelerate existing screen contents *that have already been plotted onscreen* so that if another menu/window moves over it we can plot from the cache.

If you scroll a window up, then down, then up again, we cant cache the original contents, as it could of changed between the 2nd and 3rd scroll events.

The caching algorithmns are still being tweaked (hence the beta status) so you should see some improvement in the next release.



 is a RISC OS Userspellinn on 13/11/05 8:55AM
[ Reply | Permalink | Report ]

Please login before posting a comment. Use the form on the right to do so or create a free account.

Search the archives

Today's featured article

  • Of subnets and routers
    Part two of IP networking and RISC OS
     2 comments, latest by AMS on 7/9/04 8:11PM. Published: 7 Sep 2004

  • Random article

  • VNC server user interface released
    New front-end for remote desktop software
     Discuss this. Published: 23 Oct 2007

  • Useful links

    News and media:

    Top developers:
    RISCOS LtdRISC OS OpenMW SoftwareR-CompAdvantage SixVirtualAcorn

    CJE MicrosAPDLCastlea4X-AmpleLiquid SiliconWebmonster


    RISCOS.org.ukRISCOS.orgRISCOS.infoFilebaseChris Why's Acorn/RISC OS collectionNetSurf

    Non-RISC OS:
    The RegisterThe InquirerApple InsiderBBC NewsSky NewsGoogle Newsxkcddiodesign

    © 1999-2009 The Drobe Team. Some rights reserved, click here for more information
    Powered by MiniDrobeCMS, based on J4U | Statistics
    "Who cares? I, for one, rarely go to drobe..."
    Page generated in 0.0691 seconds.