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       libmeta.a - simplified interface to metafile(5)


       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;

       char *sname;


       char *fname;




       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

       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.




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

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