The vertex buffer implementation uses the shader manager to decide
whether core painting should be used or not. Shader manager is only
used by shaders using vertex attributes instead of gl_Vertex etc.
perfectionist people that want to move a window to the exact center of
the screen but can never get close enough to it for the automatic
snapping to trigger. OpenGL-only for now, gave up on XRender, if anyone
can get it to work go for it.
svn path=/trunk/KDE/kdebase/workspace/; revision=926393
