Re: Accelerated frame buffer functions

Haakon Riiser
2005-02-02T15:42:05Z

[Xavier Bestel]

> Le mercredi 02 février 2005 à 15:21 +0100, Haakon Riiser a
> écrit :

>> How can I use a frame buffer driver's optimized copyarea,
>> fillrect, blit, etc. from userspace? The only way I've ever
>> seen anyone use the frame buffer device is by mmap()ing it
>> and doing everything manually in the mapped memory. I assume
>> there must be ioctls for accessing the accelerated functions,
>> but after several hours of grepping and googling, I give up. :-(

> Did you try DirectFB ?

Thanks for the tip, I hadn't heard about it. I will take a look,
but only to see if it can show me the user space API of /dev/fb.
I don't need a general library that supports a bunch of different
graphics cards. I'm writing my own frame buffer driver for the
GX2 CPU, and I just want to know how to call the various functions
registered in struct fb_ops, so that I can test my code. I mean,
all those functions registered in fb_ops must be accessible
somehow; if they weren't, what purpose would they serve?

--
Haakon