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Commit 6f797a90 authored by Yifan Zhu's avatar Yifan Zhu
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Round up output geometry 

Under fractional scaling, output screens can have non-integral sizes.
Previous code uses QSizeF::toSize(), which rounds to the nearest
integer. This sometimes results in different screens sharing one pixel
at the edge, which causes BUG 464842 and BUG 477791.

Implement Output::explicitLogicalSizeInt() and
Config::logicalSizeForOutputInt to explicitly round up non-integral
sizes, and use them in calculating output geometry.

BUG: 464842
BUG: 477791
parent 1d1830cb
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