Am Samstag, 1. April 2006 19:34 schrieb Stefan Dösinger:
The attached patch stops WineD3D from re-setting the GL_TEXTURE_MAX_LEVEL texture parameter every time a texture is used. It is not necessary, as the max level is a property of the texture and not the active unit(according to Lionel Ulmer). Setting the maximum level causes the 3d driver to dirtify the texture in the video memory, which has to be reloaded then every time it is used.
This patch should greatly increase the performance of most games. (I noticed an fps improvement of a factor of 5)
A small addition here: This case seems to be handled by the nvidia driver already, so the performance improvement applies only to ati cards. I tested this with my mobility radeon 9000 with the open source driver from Xorg7.0 and fglrx 8.23.7
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Stefan Dösinger