Contains a few experimental software optimizations, specifically for 64-bit systems. Optimizations currently applied:
Texture offsets calculated with multiplication rather than division.
Draw function variables are now pointer-sized, which avoids integer promotion within performance-critical loops.
Software wrapping fix is removed on 64-bit systems, as they are no longer necessary thanks to large integer sizes.
Backbuffer is transposed, allowing the CPU to take advantage of write cache more efficiently. Reverted due to to many problems.
Buffer flipping is now done directly to video memory rather than via SDL - this also have the side effect that the game runs in actual screen resolutions, which prohibits certain resolutions from working in fullscreen if the monitor doesn't support it.