NAME
    InitRastPort -- Initialize raster port structure

SYNOPSIS
    InitRastPort( rp )
                  a1

    void InitRastPort(struct rastport *);


FUNCTION
   Initialize a rastport structure to standard values.

INPUTS
    rp = pointer to a rastport structure.

RESULT
    all entries in rastport get zeroed out, with the following exceptions:

        Mask, FgPen, AOLPen, and LinePtrn are set to -1.
        The DrawMode is set to JAM2
        The font is set to the standard system font

NOTES
    The struct Rastport describes a control structure
    for a write-able raster. The rastport structure
    describes how a complete single playfield display
    will be written into. A rastport structure is
    referenced whenever any drawing or filling
    operations are to be performed on a section of
    memory.

    The section of memory which is being used in this
    way may or may not be presently a part of the
    current actual onscreen display memory. The name
    of the actual memory section which is linked to
    the rastport is referred to here as a "raster" or
    as a bitmap.

    NOTE: Calling the routine InitRastPort only
    establishes various defaults. It does NOT
    establish where, in memory, the rasters are
    located. To do graphics with this rastport the user
    must set up the bitmap pointer in the rastport.

BUGS

SEE ALSO
    graphics/rastport.h