The functions mvlineasm1, mvlineasm4 and tvlineasm2 can now be set to clamp
the vertical texture coordinate (vplc), preventing the unsightly stray lines
on the bottom of non-y-flipped sprites. (The first part of this effort, r3483,
handled their top).
However, this is only enabled for the mvlineasm ones: the vectorized variants
suffered almost no slowdown (even though a PADDUSD SSE instruction would be a
nice thing to have), while it was pretty significant for the sequential
translucent ones.
Summarizing, this leaves two cases where stray lines may appear in the non-ASM
build (the saturation is NYI for a.nasm):
- at the bottom of y-flipped sprites
- at the bottom of translucent sprites (can be toggled by #define)
Another observation is that recent GCC generates much faster code for this
stuff than Clang from SVN.
git-svn-id: https://svn.eduke32.com/eduke32@4161 1a8010ca-5511-0410-912e-c29ae57300e0
Credit to Plagman for the idea and doing the work on the game side, which is included in this commit.
(Building as C++ will give us features with which we can make improvements and optimizations on the multiplayer code and Polymer.)
git-svn-id: https://svn.eduke32.com/eduke32@3116 1a8010ca-5511-0410-912e-c29ae57300e0
With the same setup as before, a screen-filling translucent wall (with nothing
drawn behind it) renders at about 7 fps faster (from 60-something fps initially)
git-svn-id: https://svn.eduke32.com/eduke32@2498 1a8010ca-5511-0410-912e-c29ae57300e0
These two functions draw a vertical line 4 neighboring pixels at a time.
This gives a significant speed boost for a full screen solid and masked wall
scene for x86_64 (where we have plenty of registers), about 60 --> 76 fps.
git-svn-id: https://svn.eduke32.com/eduke32@2497 1a8010ca-5511-0410-912e-c29ae57300e0
