Brew MP 1.0.2
This function is used get the threshold percentage that is used to determine
when two invalidation rectangles should be joined or kept separate.
It will use the union if
(Area of Rect1 + Area of Rect2) > (Threshold% x Area of Union)
In other words, a smaller threshold encourages using the union of the
rects, while a larger threshold will track each rectangles. For the extreme
cases, a threshold of 0 will always use the union of the rects while a
theshold of 100 will only use the union of the invalidate overlap.
AEEResult IWidget_GetUnionThreshold(IWidget *pif, uint8 *pnThreshold);
AEE_SUCCESS -- The value was retrieved successfully
AEE_EFAILED -- The value could not be retrieved.