forked from amazingfate/loongoffice
cb382034b0
Drawing fat lines is slow on linux due to X11 having no direct support for it. This leads to creating the PolyPolygon geometry for each fat line, then tesselate and draw as trapezoids. This is not buffered in any way and is done at each paint. As a side effect, fat lines composed of multiple anti-aliased lines also show errors since AA-ed edges do not add up graphically. Since we have cairo now available it makes sense to use it for fat line drawing, it is markedly faster despite being a software renderer. No such gains for PolyPolygons though. Change-Id: If4001556e2dd4c15ecf2587cad6ce1e864558f2d