OK, I pushed a commit now that implements the forcing of exact texture
scaling to full board size in register with the square pattern. It does
not do any padding yet when the board image does not contain enough
squares for the current board format, and I don't want to do that for
the upcoming release. For now people will simply have to provide a
bitmap that is large enough.
A -0x0 suffix does exact scaling to the height of the board, ignoring
the width. I am not sure what else I could do, because I don't want to
use scalings that change the aspect ratio. I guess this option only
makes sense for bitmaps that have the same aspect ratio as the board.
Fortunately most boards are square. Or they must make sure it is wide
enough.
I tried to suppress anti-aliasing with the size doubling of the XQ board
in the cut-and-tile method, but this does not seem to have any effect;
the lines after scaling remain blurred. I therefore made it a bit more
reluctant to scale up the bitmap; it now only does it when the board
window exceeds 125% of the bitmap size, as the cutting-and-tiling still
works acceptable upto those sizes, and I like the result better than
after size doubling. Of course the size doubling could be delayed
further by supplying a larger bitmap.
