On Apr 5, 2005 10:11 PM, Brian Paul <[EMAIL PROTECTED]> wrote:
Roland Mainz wrote:
Ian Romanick wrote: When I look at xc/extras/Mesa/src/mesa/main/config.h I see more items on my wishlist: Would it be possible to increase |MAX_WIDTH| and |MAX_HEIGHT| (and the matching texture limits of the software rasterizer) to 8192 to support larger displays (DMX, Xinerama and Xprint come in mind) ?
If you increase MAX_WIDTH/HEIGHT too far, you'll start to see interpolation errors in triangle rasterization (the software routines). The full explanation is long, but basically there needs to be enough fractional bits in the GLfixed datatype to accomodate interpolation across the full viewport width/height.
Will increasing MAX_WIDTH/HEIGHT affect applications which run in small windows or only those which use resolutions exceeding the 4Kx4K limit?
Increasing MAX_WIDTH/HEIGHT will result in more memory usage regardless of window size.
As is, you can't exceed 4K x 4K resolution without increasing MAX_WIDTH/HEIGHT. Your glViewport call will be clamped to those limits if you specify larger.
In fact, I'm not sure that we've already gone too far by setting MAX_WIDTH/HEIGHT to 4096 while the GLfixed type only has 11 fractional bits. I haven't heard any reports of bad triangles so far though.
Do you know any specific application which may expose bad rendering when the size gets to large?
No (there's far too many OpenGL apps out there for me to say).
But there probably aren't too many people generating 4Kx4K images.
We've been running tests with the glutdemo applications and Xprint at higher resolutions (6Kx8K window size) and did not notice any bad rendering using the software rasterizer.
How large are your triangles?
The interpolation error will accumulate and be most noticable with very large triangles.
-Brian
------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
