Why the 512 limit on images

Gbox · Post by **Gbox** » Wed Dec 21, 2005 3:07 pm

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

NovaCaine · Post by **NovaCaine** » Wed Dec 21, 2005 3:11 pm

my guess would be memory constraints...

rinco · Post by **rinco** » Wed Dec 21, 2005 4:09 pm

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 · Post by **chp** » Wed Dec 21, 2005 6:40 pm

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.

Brunni · Post by **Brunni** » Wed Apr 25, 2007 5:16 am

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 :)

Altair · Post by **Altair** » Thu Apr 26, 2007 2:48 am

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 · Post by **Insert_witty_name** » Fri May 04, 2007 8:00 am

chp wrote:The hardware does not support textures wider than 2^9 (512).

You should listen to chip.