vtkLineIntegralConvolution2D_fs1.glsl was using bReset in an expression to
compute tcord0. As it was not a conditional, there was a texture fetch on a
uninitialized texture. The result could be NaN or undefined and this value
multiplied by (1-bReset) would lead to a NaN or undefined result that would
propagate to the final value of tcord0 even if the actual value of (1-bReset)
is 0. The fix is to use a conditional statement instead.

Non-finite scalars are NAN, INF, and -INF.

This included creating the appropriate OpenGL class, renaming the
classes from vtkKWE to VTK, and moving the appropriate Tests.

Made the global renderer in TestAreaSelections static.

STYLE: Added description.

LIC tests. Also added were the datasets and baseline images
used by the LICtests.

STYLE: Changed comments in vtkTriangle and vtkPolygon so that header files do not contain details about implementation.

IF(VTK_USE_DISPLAY)
to
IF(VTK_DATA_ROOT)

in
VTK/Rendering/Testing/Cxx/CMakeLists.txt
because they would fail if DATA_ROOT was not specified.

STYLE: added description for ComputeArea in vtkTriangle.h and vtkPolygon.h

 - Adding new vtkLabelPlacementMapper to replace vtkLabelPlacer.

 - Making vtkLabelPlacementMapper the default in all rendered views.

 - Making label render strategies for freetype and Qt.

 - Fix memory leak in vtkQImageToImageSource.

 - vtkLabelPlacementMapper now supports multiple hierarchy inputs
   by using the new vtkLabelHierarchyCompositeIterator which uses
   round-robin to iterate through sub-iterators.

BUG: LoadOpenGLExtension makes direct calls to opengl, need to link to opengl lib. Remove previous patch

ENH: Merge changes from main tree into VTK-5-4 branch. (cvs -q up -j1.69 -j1.71 Rendering/Testing/Cxx/CMakeLists.txt)

     tests is pretty useless on MacOS X without turning the test into
     a bundle but CTest doesn't seem to like it.)

     not a depth-first search.
ENH: Add a test for the quadtree iterator.

ENH:Added TestBlurAndSobelPasses.cxx, TestGaussianBlurPass.cxx and TestSobelGradientMagnitudePass.cxx

ENH:Make TestGenericVertexAttributesGLSLDepthPeelingPass fail when there is a driver bug. An example of this case is the current nVidia driver on gaia (81.76, very old, 2006) for a Quadro NVS 285 for which there is an unexpected link error: (0) : error C9999: symbol @TMP1 already in table.

ENH: Adding test for the EdgeVisiblity flag in vtkProperty as well as the z-shift coincident topology resolution in the default painter.