[BlackBerry][CSS Filters] Blur filter fails to recompute blur size when layer size changes
https://bugs.webkit.org/show_bug.cgi?id=114272

Reviewed by Rob Buis.

Blur appeared blocky or pixelated when surface changed size after
creating the filter actions. The initial image size was used to
determine the blur size (expressed in texture coordinate system).
Fixed by recomputing the blur size when the surface size changes, using
a new Uniform1f subclass that can use a functor to compute the uniform
value per-frame.

This fixes css3/filters/effect-blur-hw.html. This can only be verified
by manual inspection because the BlackBerry port is not currently using
pixel tests.

PR 323730

* platform/graphics/blackberry/LayerFilterRenderer.cpp:
(WebCore):
(SurfaceFunctor):
(WebCore::SurfaceFunctor::SurfaceFunctor):
(InverseSurfaceWidth):
(WebCore::InverseSurfaceWidth::InverseSurfaceWidth):
(WebCore::InverseSurfaceWidth::operator()):
(InverseSurfaceHeight):
(WebCore::InverseSurfaceHeight::InverseSurfaceHeight):
(WebCore::LayerFilterRenderer::actionsForOperations):
* platform/graphics/blackberry/LayerFilterRenderer.h:
(Uniform1f):
(WebCore):
(Uniform1fWithFunctor):
(WebCore::Uniform1fWithFunctor::create):
(WebCore::Uniform1fWithFunctor::Uniform1fWithFunctor):
(WebCore::Uniform1fWithFunctor::apply):
(WebCore::Uniform1f::createWithFunctor):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148201 268f45cc-cd09-0410-ab3c-d52691b4dbfc