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eglPostSubBufferNV is used to communicate the size of the window, as
otherwise there is no way for the renderer to know if the last frame was
rendered in landscape or portrait, causing rendering glitches when the
orientation changes. The rotation flags are utilized in a few additional
places now to fix some corner cases where the rotation was not applied.
This patch should be squashed into "ANGLE-Improve-Windows-Phone-Support"
during the next ANGLE rebase.
Task-number: QTBUG-44333
Task-number: QTBUG-43502
Change-Id: Iec37f7531854184819c30c87eab82d96d56ff133
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
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