On Thu, 5 May 2005, James Simmons wrote:

quoted

What if we just got rid of fb_read/write and converted fbconsole to
use fb_imageblt?

   fbconsole does use only fb_imageblit. The only place where screen_base 
is used is fb_write and fb_read in fbmem.c. If that could be converted to use 
the accelerated image blitting functions then we could replace it. To do 
that requires one thing and that is to add image blitting from screen 
memory to system memory. Currently no driver including the software 
blitting supports that. Plus we have no standard api to handle that. 
   So first we have to come up with a standard way to handling image 
blitting from card memory to system memory without breaking badly the 
current api. Second we have to add bi directional blitting to every 
driver. Then once we are done we can convert the fb_read and fb_write 
functions to using the fb_imageblit functon. Have have plans to do this 
but have not yet done it.

What if the graphics memory format is not chunked pixels? In that case
fb_{read,write}() will behave differently than mmap().

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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