forums.ps2dev.org

Thanhda · Joined: 09 Apr 2005 Posts: 331 Location: Canada

has anyone manage to get dreamgl working on the psp.
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Oobles · Posted: Fri May 27, 2005 11:59 am Post subject:

dreamgl was written for the ps2. It will require some major changes to make it work with the psp.

You will also find that most code in the ps2cvs will not be able to run on the psp without major modifications. I will be setting up a pspcvs here and make it available for people to host projects.

Oobles.

rinco · Posted: Fri May 27, 2005 1:39 pm Post subject:

Most of the ps2 specifics of Dreamgl is in ps2_dgl.c.

Replacing those specifics wouldn't be too difficult.

With what is currently known about the PSP... it would make more sense
to port Mesa.

Thanhda · Joined: 09 Apr 2005 Posts: 331 Location: Canada

Warren · Joined: 24 Jan 2004 Posts: 173 Location: San Diego, CA

Most of the builtin PSP graphics APIs are very similar to openGL. Wait until they are fully reversed and use them, no need to port some heavyweight library or port dreamGL.

Guest · Posted: Fri May 27, 2005 3:27 pm Post subject:

Since there is direct access to the frame buffer, should be easy to do all OpenGL rendering in software with minimal porting effort. I think that is what Rinco meant by "what is currently known".

Now, you bring up "down the road" which is an entirely different matter, since issues such as how to know and make use of any hardware acceleration becomes more visible, if even possible.

Thanhda · Joined: 09 Apr 2005 Posts: 331 Location: Canada

Guest · Posted: Fri May 27, 2005 4:04 pm Post subject:

Neither, nor do I think you understand the matter at all.

Mesa renders OpenGL via software calls, not using hardware. As such, it should be trivial to port to the PSP, since it should only need to know where a framebuffer is. Again, this I think is the basis of Rinco's suggestion.

Any implementation of OpenGL that does hardware based rendering would require more time, effort, and especially understanding of the underlying graphics hardware api. This is why you won't see such from homebrew anytime soon...

Drakonite · Site Admin Joined: 17 Jan 2004 Posts: 989

Guest · Posted: Fri May 27, 2005 7:16 pm Post subject:

th0mas · Joined: 24 Apr 2005 Posts: 43 Location: Canada

software mesa is going to be slow. I ported it to the xbox using openxdk, and it is unuseably slow on that, so the psp on a similiarly unaccelerated framebuffer is going to be slow as well.

edit: I mean really, really slow :).
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mrbrown · Joined: 17 Jan 2004 Posts: 1536

Thanhda · Joined: 09 Apr 2005 Posts: 331 Location: Canada

what is needed to know to do reverse engineering, ASM? any tutorials? also for re writting it, i would have to compile my own lib file correct? i was told to look at the blue book for the reference manual. i was wondering is there such opengl.c file available. where the methods have already been written, making it easier to make it work on the psp.
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There are 10 types of people in the world: Those who understand binary, and those who don't...

ooPo · Posted: Sat May 28, 2005 2:10 am Post subject:

You never fail to amaze and amuse, sir.

Guest · Posted: Sat May 28, 2005 2:26 am Post subject:

Locked. Your question was anwered completely. If you want opengl at all right now, look at mesa. Don't ask anyone any other questions until yhou have downloaded and ported it to PSP.