Package vgx11 implements X-Window vg support.
Canvas implements the vg.Canvas interface, drawing to an image.Image using draw2d.
New returns a new image canvas with the size specified rounded up to the nearest pixel.
NewImage returns a new image canvas that draws to the given image. The minimum point of the given image should probably be 0,0.
NewPainter creates a new Painter for the given image.
Paint satisfies the Painter interface by painting ss onto an xgraphics.Image.
SetColor sets the color to paint the spans.