Homebrew GX_SetTextureCopy

[elhobbs]

Has anyone been able to get GX_SetTextureCopy to work - if so can someone point me to an example?

 

[zoogie]

Has anyone been able to get GX_SetTextureCopy to work - if so can someone point me to an example?

Take your pick:
https://github.com/search?p=4&q=GX_SetTextureCopy&ref=searchresults&type=Code&utf8=✓

It's part of gspwn, so any type of exploit code will have it.

 

[elhobbs]

Take your pick:
https://github.com/search?p=4&q=GX_SetTextureCopy&ref=searchresults&type=Code&utf8=✓

It's part of gspwn, so any type of exploit code will have it.

thanks - stupid assumption on my part. Looks like source needs to be in linear address space. linear to linear works as expected.
edit: and really slow - I thought it would be faster than memcpy. doesnt appear to be the case.

 

[machinamentum]

thanks - stupid assumption on my part. Looks like source needs to be in linear address space. linear to linear works as expected.
edit: and really slow - I thought it would be faster than memcpy. doesnt appear to be the case.

memcpy can be really efficient at copying memory but fact of the matter is that it takes time (a lot of time) to get memory into the CPU from main memory and it takes time to write it back to main memory. The GPU suffers this same problem and quite often a 1024x1024 texture takes a long time to draw from main memory and quite often VRAM textures will be many many times faster.

One of my favorite quotes on this problem (on x64 PC's):
"We can execute 36 instructions in a single cycle and it takes 100 cycles to get a byte of memory into the CPU. We have a problem."