sprites are drawn, but I think that's how it should be.
1: No bells or whistles.
2: This setting adds sprite blending, e.g. the smoke at the docks or the
display cases at the Glease Gallery.
3: This setting adds light map support, e.g. when walking under the shack
at the docks.
4: This setting adds better scaling algorithms.
The first three settings should work fine now. In fact, the third setting
is what we used to implement. The fourth setting still needs work and
testing. I've added code for downscaling case, but frankly I'm not
convinced the result is any better than with the simpler scaler. I usually
can't even tell the difference.
Of course, my translation of the original code could very well be buggy.
svn-id: r9867
