ENH: Create textures from vtkImageData.
ENH: Create textures from vtkImageData.

This function is still pretty raw, and will only work as expected when
used with an OpenGL 2 card. It is only called in one of the DrawImage
functions right now, and will either be generalized or removed. It is
also hardwired right now for drawing images the way I need them drawn.

Change-Id: Icf3a7160edadb47e2f857430ba7f9ae82a30e2d0

hendradarwin/VTK,jmerkow/VTK,jmerkow/VTK,gram526/VTK,johnkit/vtk-dev,arnaudgelas/VTK,gram526/VTK,SimVascular/VTK,biddisco/VTK,aashish24/VTK-old,johnkit/vtk-dev,sankhesh/VTK,gram526/VTK,sumedhasingla/VTK,SimVascular/VTK,ashray/VTK-EVM,sumedhasingla/VTK,ashray/VTK-EVM,candy7393/VTK,jmerkow/VTK,sumedhasingla/VTK,arnaudgelas/VTK,mspark93/VTK,gram526/VTK,johnkit/vtk-dev,sumedhasingla/VTK,collects/VTK,daviddoria/PointGraphsPhase1,SimVascular/VTK,msmolens/VTK,sumedhasingla/VTK,msmolens/VTK,msmolens/VTK,keithroe/vtkoptix,msmolens/VTK,demarle/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,SimVascular/VTK,candy7393/VTK,demarle/VTK,biddisco/VTK,biddisco/VTK,sumedhasingla/VTK,spthaolt/VTK,SimVascular/VTK,SimVascular/VTK,biddisco/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,msmolens/VTK,cjh1/VTK,arnaudgelas/VTK,johnkit/vtk-dev,johnkit/vtk-dev,keithroe/vtkoptix,collects/VTK,candy7393/VTK,biddisco/VTK,candy7393/VTK,mspark93/VTK,ashray/VTK-EVM,spthaolt/VTK,demarle/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,cjh1/VTK,SimVascular/VTK,ashray/VTK-EVM,mspark93/VTK,biddisco/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,daviddoria/PointGraphsPhase1,aashish24/VTK-old,sankhesh/VTK,candy7393/VTK,cjh1/VTK,ashray/VTK-EVM,demarle/VTK,spthaolt/VTK,spthaolt/VTK,johnkit/vtk-dev,sankhesh/VTK,mspark93/VTK,biddisco/VTK,arnaudgelas/VTK,msmolens/VTK,sankhesh/VTK,msmolens/VTK,demarle/VTK,mspark93/VTK,aashish24/VTK-old,sumedhasingla/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,arnaudgelas/VTK,berendkleinhaneveld/VTK,cjh1/VTK,keithroe/vtkoptix,collects/VTK,sankhesh/VTK,demarle/VTK,mspark93/VTK,daviddoria/PointGraphsPhase1,hendradarwin/VTK,gram526/VTK,jmerkow/VTK,jmerkow/VTK,hendradarwin/VTK,daviddoria/PointGraphsPhase1,collects/VTK,collects/VTK,msmolens/VTK,cjh1/VTK,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,aashish24/VTK-old,SimVascular/VTK,cjh1/VTK,candy7393/VTK,sankhesh/VTK,gram526/VTK,gram526/VTK,aashish24/VTK-old,daviddoria/PointGraphsPhase1,johnkit/vtk-dev,gram526/VTK,candy7393/VTK,mspark93/VTK,daviddoria/PointGraphsPhase1,aashish24/VTK-old,sankhesh/VTK,ashray/VTK-EVM,mspark93/VTK,candy7393/VTK,spthaolt/VTK,demarle/VTK,jmerkow/VTK,jmerkow/VTK,demarle/VTK,keithroe/vtkoptix,spthaolt/VTK,collects/VTK,spthaolt/VTK,ashray/VTK-EVM,keithroe/vtkoptix,arnaudgelas/VTK,hendradarwin/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM