 implement any kind of graphic output: on-screen (platform specific, OpenGL), off-screen (raw bitmaps), files (pdf, svg, postscript), network streams...</p>
<p><code>VGDevices</code> derived classes must provide standard graphic functions (Lines, Arcs, Boxes,Polygons, Text), coordinate transformations (zoom / scaling), and symbolic music symbols handlers (DrawSymbol method). <code><a class="el" href="classVGDevice.html" title="Generic platform independant drawing device.">VGDevice</a></code> design makes a 