CairoCanvas, implements clipping, fix issue 24217

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40726 4005530d-fff6-0310-9dd1-cebe43e6787f
CairoCanvas, updated test

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40727 4005530d-fff6-0310-9dd1-cebe43e6787f