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- Limitations of the ViRGE chip:
-
- The S3 ViRGE driver has a few limitations that are a result of the limitations
- of the chip itself, or are a result of insufficient documentation:
-
- - Texture wrapping cannot be disabled in the current driver version. It is
- uncertain whether this is a feature of the chip or not.
-
- - Most of the alpha blending modes are not supported. There is no
- source or destination function, and only texture values can be used
- for transparency.
-
- - There is no difference between magnification and minification filtering.
- Filtering of textures is for magnification, mipmapping for minification.
- Trilinear filtering is possible, though.
-
- - Only linear interpolated fogging is available. All other modes are rejected.
- You may override this with the variable Warp3D/ViRGE/Fog. If set to "linear",
- linear fog is accepted. If set to "all", all fogging is accepted. All other
- values only allow interploated fog.
-
- For more details, refer to docs/Warp3D_User.guide.
-