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Reviewed-by: Trust Me
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Some OpenVG GPU's have limitations on the amount of memory
available to create VGImage's. When the memory runs out,
vgCreateImage() will fail.
This change introduces QVGImagePool, which keeps track of all
QVGPixmapData image allocations and ejects least-recently-used
pixmaps when GPU memory is exhausted.
Task-number: QT-2554
Reviewed-by: trustme
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Reviewed-by: Sarah Smith
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Previously, the drop shadow was colorizing the incoming
image and then blurring the colorized version. This change
first blurs the image to an alpha-only VGImage and then uses
that VGImage as a stencil to draw the drop shadow color.
This way, there is only 1 filter step and a draw instead of
2 filter steps and a draw. The result is to make the performance
of the drop shadow filter almost identical to the blur filter.
Reviewed-by: trustme
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Task-number: QT-2016
Reviewed-by: trustme
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It wasn't possible for the paint engine to override the drop
shadow filter because QPixmapDropShadowFilter::draw() was not
asking for an engine-specific filter object.
Also, change the OpenVG filter to use vgGaussianBlur() instead of
vgConvolve(), and draw the original image on top of the shadow.
Task-number: QTBUG-4583
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: Sarah Smith
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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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