ATI M7 BLTs don't work on screen width not divisible by 64

Michel Dänzer michel at
Fri Apr 27 06:33:55 PDT 2007

On Fri, 2007-04-27 at 04:55 -0700, John Klingler wrote:
> Once again I am getting complaints from customers about the slowness of BLTs
> on screen widths of 1400, which is now quite prevalent. Before we talked 
> about solving the by defining surfaces that are multiples of 64 bytes but 
> displaying only the 1400 byte screen width but we never found a way to implement this.

As I think I pointed out earlier, the xf86-video-ati radeon driver
supports this. pScrn->virtualX is the virtual width, pScrn->displayWidth
the pitch.

Earthling Michel Dänzer           |
Libre software enthusiast         |          Debian, X and DRI developer

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