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WebKit draws rounded rectangles by setting a rounded rect path as a
clip and then filling the clip. This had problems when QVG_SCISSOR_CLIP
was enabled because the scissor would only clip to the bounding box
of complex paths. Thus, rounded rectangle clips were turned into
normal rectangle clips.
This change will make the scissor clipping code subdivide complex paths
into rectangles and use a tighter clip if the number of rectangles is
less than or equal to VG_MAX_SCISSOR_RECTS. If it is greater, then it
will fall back to the bounding box of the path.
Task-number: QT-3372
Reviewed-by: Jason Barron
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This change introduces the extra blending modes that are
defined in the VG_KHR_advanced_blending extension. Patch
originally provided by contributor:
http://qt.gitorious.org/qt/qt/merge_requests/505
Reviewed-by: Julian de Bhal
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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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Adding docs on how to use hardware acceleration on Embedded Linux and Windows CE
Task-number: QT-1109
Rev-by: Anders Bakken
Rev-by: Rhys Weatherley
Rev-by: Thomas Hartmann
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