forums.ps2dev.org

damark · Joined: 30 Jun 2005 Posts: 1

can someone please tell me if anyone is working on figuring out the GPU?

chp · Joined: 23 Jun 2004 Posts: 313

MindWall · Joined: 10 May 2005 Posts: 70

I don't know if you had this info, but just in case you don't and it may be of use...

as the slide says:

LibGU - primary graphics library is very similar to OpenGL
sceGuStart, sceGuFinish, sceGuMaterial, sceGuLight, sceGuDrawArray, sceGuDrawBezier...

LibGUM
matrix stack manipulation
somewhat similar to OpenGL's glu

LibGMO
high-level graphics library

source:
http://pc.watch.impress.co.jp/docs/2005/0323/kaigai_9.jpg

PSP Graphics Core (1)
-3D Curved Surface + 3D Polygon
-Compressed Texture
-Hardware Clipping, Morphing, Bone(8)
-Hardware Tessellator
-Bezier, B-Spline (NURBS)
ex)4x4,16x16,64x64 sub-division

source:
http://www.watch.impress.co.jp/game/docs/20030729/psp07.jpg

as far as PMFS go:

Video playback performed by Media Block
-AVC stream for video
-ATRAC3plus stream for audio
PSP Movie Format (psmf)
-BAsed on MPEG-2 program stream
--header dictates multiplexing
--Libmpeg used to decode
--64x64 smalest video size
--16x16 macroblocks
--Max 480x272
--Playback at 29.97Hz

source:
http://pc.watch.impress.co.jp/docs/2005/0323/kaigai_12.jpg

AVC Decoder
-AVC (H.264) Decoder
-Main Profile
-Baseline Profile
-@Level1, Level2, Level3
-2 hours DVD movie
-4 hours CS Digital

source:
http://pc.watch.impress.co.jp/docs/2003/0730/m21111.jpg

chp · Joined: 23 Jun 2004 Posts: 313

"Compressed Texture" sounds interesting... After a little searching:

http://www.anandtech.com/news/shownews.aspx?i=22852

This means we have DXT-compression available, so we can suddenly fit a lot more textures in that space.. No more VQ-compression. :) I think there's a DXT compression library available at developer.nvidia.com, but I didn't find it when I looked right now.

jboldiga · Joined: 20 Jun 2005 Posts: 27

I believe this is what you are looking for

http://developer.nvidia.com/object/nv_texture_tools.html

chp · Joined: 23 Jun 2004 Posts: 313

Niek · Joined: 02 Jul 2005 Posts: 1

I found the following info somewhere on a site (if this is illegal, please delete this post):

[Deleted as it's obviously from the official SDK]

mrbrown · Joined: 17 Jan 2004 Posts: 1536

Niek if you are unsure as to the legitimacy of documentation on another site, ask around before posting here (or at least post a link, so you look more legit).

To add to that, posting info from the official Sony SDK is against the rules, and seeing as how folks are getting banned left and right for that and the other thing, I'll have to give you a warning.

Be careful what you post next time.

cable16 · Joined: 22 Mar 2005 Posts: 22

could someone point me to win32 binaries for subversion 1.20?

EDIT: nevermind, they're on the official site :)

jboldiga · Joined: 20 Jun 2005 Posts: 27

ector · Joined: 12 May 2005 Posts: 195

It's not like DXT is complicated though. But I can imagine finding the optimal compression for each block, and also taking into account surrounding blocks for the best image quality, would be a challenge..

jboldiga · Joined: 20 Jun 2005 Posts: 27

now that I think of it...doesnt the latest nvidia sdk (9.0?) have source for the dxt stuff? I would try it but I am not at work so I dont have access to a windoze machine.

Kristof · Joined: 20 May 2005 Posts: 46

From what I've heard from developper friends, compressed textures are slow because uncompressed into 32bits texutres in vram. Like on PS2, paletised texture are the best on PSP.