Commit 12491f35bbea7008b15fb0ba0ee7ea5bf6eb6b6c from Laszlo Agocs:
Fix transformation in eglfs backingstore
While not visible with forced-fullscreen windows, the formula used
to set up positioning on the Y axis is wrong. (with the GL
coordinate system Y goes 1..-1 when moving top-to-bottom)
Taken from kms' version of the backingstore which had the formulas
corrected.
I am crosscompiling qt5 for a Raspberry Pi board using eglfs, and the
latest raspbian (2012-08-16-wheezy-raspbian). It has gone well
with the most recent git masters, pulled today.
I noticed though that while running various qtbase widget examples
(scribble, sliders, etc) that the Y axis is inverted.
Those opengl examples that work, do show up properly regardless of
this patch (paintedwindow).
The commit above seems to be responsible. If I revert it, then the
apps display properly (though opening menus, etc still cause crashes,
but that's another issue.)
OpenGL apps, including qml via qmlscene still look correct.
I suspect that Y inversion is already being handled elsewhere within
Qt, so I am curious as to what problem was actually seen that required
this change?
Should it be reverted?
--
Jon Trulson
Atoms are what make us matter.
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