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Reviewed-by: Trust Me
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Add support for accelerated scrolling in the "direct" window surface
implementation. Using vgCopyPixels(), the already rasterized content on
the surface can be shifted to a new location such that only a portion
of the suqsequent frame needs to be repainted instead of the entire
frame.
This only works when the "preserved" EGL swap behavior is enabled and
the impact on performance is highly dependant on the specific hardware
platform in use.
Task-number: QT-2972
Reviewed-by: Rhys Weatherley
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Reviewed-by: Trust Me
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Rendering into a QImage as a window backing store isn't very efficient
and isn't needed by any of our current platforms. If a specific
graphics system needs it in the future, it can implement it directly.
Reviewed-by: trustme
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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This change also moves the EGL support classes from QtOpenGL to QtGui
so they can be shared between OpenGL and OpenVG.
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