forums.ps2dev.org

Gbox · Joined: 21 Dec 2005 Posts: 1

Im just curious, why are image dimentions limited to 512x512?

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

my guess would be memory constraints...

rinco · Posted: Wed Dec 21, 2005 4:09 pm Post subject:

sceGuTexImage seems to have problems with images bigger than 512x512. The only way around this that I could see is to specify a smaller image to sceGuTexImage, with the appropriate memaligned x/y offset.

SDL compensates for images greater than 512x512 at the cost of some extra complexity. LuaPlayer probably doesn't workaround the limitation for the sake of simplicity.

chp · Joined: 23 Jun 2004 Posts: 313

The hardware does not support textures wider than 2^9 (512). You can of course do as rinco suggests and wrap this in multiple passes with a shifting base-address and a buffer-width that skips unneeded parts of the texture.
_________________
GE Dominator

Brunni · Joined: 08 Oct 2005 Posts: 186

I'm trying to do this but I've got a problem: the texture block width (third argument to sceGuTexImage) can't be larger than 1024 (else it will be clamped to 1024, or if it's greater than 2048 it will be wrapped), so it is impossible to draw textures larger than 1024xsomething, right?
Do you have any idea to improve that? Thanks :)
_________________
Sorry for my bad english

Oldschool library for PSP - PC version released

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

That limit is only for png's. JPG's can be larger, but I don't know what the limit on them is, my biggest image I've blitted is 1000x1000.

Insert_witty_name · Joined: 10 May 2006 Posts: 376