-our buffered uhh buffer needs to be only advanced per column not per screenwidth, caused the buffer to advance beyond its boundaries
-brightmap drawers get the DC_DIRECT flag to make sure they never attempt to draw buffered
removed tempbuffer alignment for now as reported by ubsan
based on 2da89f1946
move screens array to vid struct
remove a bunch of unused stuff
this speeds up 4 player splitscreen ever so slighty
mostly just alot cleaner than the mess it was before
-Textures with 0 height are not checked for wraps, this helps speed up multipatch columns.
-A useless call to R_FakeFlat has been removed.
-Slopes now use floats rather than doubles to calculate UV coordinates.
Two reasons:
- Makes it more straight-forward to add brightmaps to the non-power-of-two rendering functions.
- Made it easier to split off brightmap rendering. Hopefully improves performance, but I haven't thoroughly tested this.
