R3 = mode to check for, or -1 for current mode
Exit:
R0 = bit meaning if set
0 a pixel translation table would be needed
1 a scaling table would be needed
2-31 undefined; will be 0 if the sprite doesn't need transforming
Checks whether the specified sprite needs to be scaled or needs a pixel translation table to be plotted correctly in the specified mode. If either of these things are required, other WimpExt_SpriteOp calls exist to calculate them for you.
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