NAME

       libmeta.a - simplified interface to metafile(5)

SYNOPSIS

       extern FILE *pout;

       mline(x, y, type, thick, color)

       mpoly(x, y, border, pat, color)

       mdraw(x, y)

       mtext(x, y, s, cpi, color)
       char *s;

       mvstr(xmin, ymin, xmax, ymax, s, d, thick, color)
       char *s;

       mrectangle(xmin, ymin, xmax, ymax, pat, color)

       mtriangle(xmin, ymin, xmax, ymax, d, pat, color)

       msegment(xmin, ymin, xmax, ymax, sname, d, thick, color)
       char *sname;

       msetpat(pat, pattern)
       char *pattern;

       mopenseg(sname)
       char *sname;

       mcloseseg()

       minclude(fname)
       char *fname;

       mendpage()

       mdone()

DESCRIPTION

       The  routines  in  libmeta provide a simple interface to the metafile(5) 2D graphics stream.  Output from
       these routines is sent to pout.  Pout defaults to the  standard  output,  and  should  be  piped  to  the
       appropriate device driver.

       All coordinates range from 0 to 16383 and map to a square area on the output device.  D values are one of
       'r', 'u', 'l' and 'd' corresponding to right, up, left, and down respectively.  Color values range from 0
       to  3  and  normally  correspond  to  black,  cyan, green and blue.  Pattern values range from 0 to 3 and
       default to solid, thick lines, thin lines, and candystripe.  Pattern value mapping  may  be  changed  via
       setpat.  All strings are null-terminated, and do not contain newlines.

       Mline  starts  a  line  at the given coordinates.  The line type is a number from 0 to 3 corresponding to
       solid, dashed, dotted, and dot-dashed.  The line thickness, thick, is a number from 0  to  3.   Connected
       lines are drawn with successive calls to mdraw.

       Mpoly starts a polygon at the given coordinates.  The boolean border specifies whether or not a border is
       desired around the polygon.  Mdraw is used to add vertices to the polygon.  The polygon  will  be  closed
       automatically after the last call.

       Mtext  prints a string of hardware characters starting at the given coordinates.  The characters per inch
       are cpi.  Text is always oriented to the right.

       Mvstr places a vector character string within the given boundaries.  The string is oriented according  to
       d.  The character line thickness is given by thick.

       Mrectangle  fills  the  given box with pat.  Mtriangle fills the half-box with orientation d in the given
       boundaries.  Right corresponds to a triangle in the lower right half of the box.   Up  corresponds  to  a
       triangle in the upper right, left is upper left, and down is lower left.

       Msegment  places  an  instance of the segment sname within the given boundaries.  The segment is oriented
       according to d, where 'r' is null rotation.  If either thick or color is nonzero, its value will  replace
       corresponding values in the segment primitives.  (For area filling, thick changes the fill pattern.)

       Msetpat maps pat to pattern.  Pattern is a string of the form "Pn" where n is a number between 0 and 11.

       Mopenseg opens the segment named sname.  All graphics calls up to a matching call to mcloseseg are stored
       under sname.  An instance of the segment is obtained with a call to msegment.  Segments can be nested  to
       any  level,  and  redefining  segments is allowed.  Beware of calls to mtext within a segment, since text
       will not rotate or scale.

       Minclude includes the graphics metafile fname in the output stream.  Mendpage advances to the next screen
       or page.  On a terminal, the bell rings and a line is read to prevent premature erasure.  Mdone completes
       metafile output, and is the only required call.

DIAGNOSTICS

       None.

SEE ALSO

       t4014(1), mx80(1), impress(1), primout(3), metafile(5)