Intel(R) 82852/82855 GM/GME Controller render target texture corruption

[vjudys]

Hello all,

Our company is working on a PC game and recently we faced the texture corruption issue that only manifests itself on Intel 82852/82855 GM/GME Controllers while using DirectX 9.0c, November 2007 release.

The issue is not consistent and some times does not appear at all. Please see attached file. We also do not have an issue like that on other chipsets, including Intel 82845G Graphics Controller.

I wonder if there are any limitations or conditions that needs to be met in order to get the proper texture rendering?

EDIT: Upon further investigation, I realized that we are having issues only with the textures that used be a render targets. Using PIX I had discovered that the texture was already corrupted before it was rendered to the back buffer, so it was corrupted when it was rendered into. Are there anything special with the render target handling on this chipset?

Thanks,

Vlad Judys

[delacy__david]

it could be a problem with how the texture is sampled

if the texture is a 32bit FP texture but the sample is a linear sample then there will be issues with that

the sampler would need to do a point sample and not linear....