PostScript images should use dpi=72 to get the right size.
Fix for bug 2425 is incorrect. First, the users' graph should never cause
the code to enter the if (ND_shape(n)->usershape) {} block, as the nodes
just use the image attribute. Second, the logic fails to handle the case
of postscript library shapes.
Simplify gvusershape_find();
fix bug 2425. With the use of cgraph, the strings used in attributes are attached to
the root graph, so file name pointers being stored in the image cache are no longer
valid when the graph is deleted. The image cache needs to use the global string cache.
As this could lead to many unsed image cache items, we might consider limiting the cache
size, or starting afresh with each new graph.
Merge branch 'master' of ssh://github.com/ellson/graphviz
Merge branch 'master' of ssh://github.com/ellson/graphviz
Merge branch 'master' of ssh://github.com/ellson/graphviz
Allow _draw_ as well as _background to describe graph background.