[FIXED] Graphics Issues.. weird.

MikeDX · Post by **MikeDX** » Mon Nov 07, 2005 7:35 am

Hey people. I've just about completed porting Bruno's Mikie Emulator to the PSP. It works great.

However. There seems to be an issue with some sort of tearing (not vsync related) when displaying graphics.

I would attach a screenshot but this forum doesnt seem to allow it. Any offer on image hosting or anything?

I'm happy to send our binaries for people to test if they can help.

danzel · Post by **danzel** » Mon Nov 07, 2005 8:37 am

throw an image up on http://www.imageshack.us/

Danzel.

MikeDX · Post by **MikeDX** » Mon Nov 07, 2005 9:02 am

Righto... now where was that screencap code I saw...

Hmm.. anybody got any screencap code that I can use from within the app itself? dumping the output of my buffer to a file results in "perfect" graphics.

failing that, anybody got a camera that they can take a photo of - If i send them a binary.

MikeDX · Post by **MikeDX** » Mon Nov 07, 2005 9:43 am

ok now this is even more weird

If I call my drawsprites() function twice, it seems the problem doesnt occur..

is there some kind of write-delay that I need to be aware of???

Paco · Post by **Paco** » Mon Nov 07, 2005 10:50 am

MikeDX wrote:ok now this is even more weird

If I call my drawsprites() function twice, it seems the problem doesnt occur..

is there some kind of write-delay that I need to be aware of???

Possibly, the GE chip can't read stuff from the CPU's cache, so try calling sceKernelDcacheWriteback() (check name in header files). Alternatively, you can write your vertex buffers to uncached memory.

MikeDX · Post by **MikeDX** » Mon Nov 07, 2005 8:03 pm

Thanks Paco, that is perfect

sceKernelDcacheWritebackAll(); was the one I needed!