JxPond
Posts: 29
Joined: Wed May 22, 2013 9:32 pm

Accessing the GPU (VideoCore IV)

Fri May 31, 2013 6:18 pm

Is it possible to access the GPU in RISC OS as one can currently do full screen in Raspbian?
to take advantage of the following:

OpenGLES
OpenVG
OpenMAX

mimi123
Posts: 583
Joined: Thu Aug 22, 2013 3:32 pm

Re: Accessing the GPU (VideoCore IV)

Thu Aug 22, 2013 10:27 pm

VideoCore IV acceleration isn't yet implemented.
If you are a developer, try to port userland librairies from:

http://www.github.com/raspberrypi/userland
(Graphical Acceleration does'nt work in FreeBSD and Plan9 as well)

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DavidS
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Re: Accessing the GPU (VideoCore IV)

Fri Oct 04, 2013 2:12 am

mimi123 wrote:VideoCore IV acceleration isn't yet implemented.
If you are a developer, try to port userland librairies from:

http://www.github.com/raspberrypi/userland
(Graphical Acceleration does'nt work in FreeBSD and Plan9 as well)
Wow it is no wonder that Linux seems to be the only OS to support VideoCore IV acceleration on the RPi. Having finaly taken the time to look at that code, it would take a very long time to strip out the OS dependant stuff while keeping it working.

I take it that Broadcom does not like non-Linux OSes?
RPi = The best ARM based RISC OS computer around
More than 95% of posts made from RISC OS on RPi 1B/1B+ computers. Most of the rest from RISC OS on RPi 2B/3B/3B+ computers

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AndrewS
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Re: Accessing the GPU (VideoCore IV)

Fri Oct 04, 2013 2:42 am

DavidS wrote:I take it that Broadcom does not like non-Linux OSes?
Probably more likely that there's been no commercial requests for non-Linux support... ? ;)

gsh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: Accessing the GPU (VideoCore IV)

Fri Oct 04, 2013 6:16 am

Yes,

That's right, there is little commercial call for anything other than Linux based (or Windows based) operating systems and therefore no resources to concentrate on that work.

There's nothing wrong with non-linux OSes but it'd be a complete waste of money doing anything with it...

Gordon
--
Gordon Hollingworth PhD
Raspberry Pi - Director of Software Engineering

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DavidS
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Location: USA
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Re: Accessing the GPU (VideoCore IV)

Fri Oct 04, 2013 11:52 am

Ok. That is an understandable view. I had not realy thought about that, though Linux does rule the OS world at this time.
RPi = The best ARM based RISC OS computer around
More than 95% of posts made from RISC OS on RPi 1B/1B+ computers. Most of the rest from RISC OS on RPi 2B/3B/3B+ computers

mimi123
Posts: 583
Joined: Thu Aug 22, 2013 3:32 pm

Re: Accessing the GPU (VideoCore IV)

Wed Oct 09, 2013 3:12 pm

The abstraction with the OS is in vcos library.

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