[PATCH 0/4] fb support for 8bpp bitmaps

Michel Dänzer michel at daenzer.net
Mon Jan 13 23:02:22 PST 2014

On Mon, 2014-01-13 at 18:00 -0800, Keith Packard wrote:
> Here's a fun sequence of patches. What it does is make fb support
> bitmaps (depth 1 pixmaps) that are stored in 8 bits per pixel. Why
> would you want to do this, you ask? Well, Glamor wants to use GL for
> all rendering, and GL has no support for 1bpp surfaces. Making fb
> support bitmaps in 8bpp means we'll have "native" format support in GL
> for the same pixmaps which means we can map them instead of copying
> them.

Didn't SNA prove though that sharing the same pixel storage for GPU and
CPU doesn't give the overall best performance even with Intel GPUs? It
certainly doesn't with most other GPUs.

Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer

More information about the xorg-devel mailing list