To begin output to a Scalable Vector Graphics (SVG) file. Scalable Vector Graphics files allow you to produce graphics file that are resolution independent.
INTEGER FUNCTION OPEN_SVG1@(FILE, NX, NY, ID)
Calling OPEN_SVG1@ will direct graphics to a new SVG graphics file. SVG has the advantage of being a vector format that will scale with the resolution required.
NX and NY specify the bounding box into which the graphics are to be drawn. FILE is the path of the file. This is
analogous to generating printer output. If ID is zero then the current "drawing surface" is selected when the file is closed otherwise ID
is the user's identifier of the graphics object to be selected (see SELECT_GRAPHICS_OBJECT@).
The function returns a handle which should be passed to CLOSE_SVG@ to terminate output to the file.