NAME

       mdraw_text_extents - Compute text pixel width.

SYNOPSIS

       int mdraw_text_extents (MFrame * frame, MText * mt, int from, int to, MDrawControl *
       control, MDrawMetric * overall_ink_return, MDrawMetric * overall_logical_return,
       MDrawMetric * overall_line_return)

DESCRIPTION

       Compute text pixel width. The mdraw_text_extents() function computes the width of text
       between from and to of M-text mt when it is drawn on a window of frame frame using the
       mdraw_text_with_control() function with the drawing control object control.

       If overall_ink_return is not NULL, this function also computes the bounding box of
       character ink of the M-text, and stores the results in the members of the structure
       pointed to by overall_ink_return.  If the M-text has a face specifying a surrounding box,
       the box is included in the bounding box.

       If overall_logical_return is not NULL, this function also computes the bounding box that
       provides minimum spacing to other graphical features (such as surrounding box) for the
       M-text, and stores the results in the members of the structure pointed to by
       overall_logical_return.

       If overall_line_return is not NULL, this function also computes the bounding box that
       provides minimum spacing to the other M-text drawn, and stores the results in the members
       of the structure pointed to by overall_line_return.  This is a union of overall_ink_return
       and overall_logical_return if the members min_line_ascent, min_line_descent,
       max_line_ascent, and max_line_descent of control are all zero.

RETURN VALUE

           This function returns the width of the text to be drawn in the unit of pixels. If
           control->two_dimensional is nonzero and the text is drawn in multiple physical lines,
           it returns the width of the widest line. If an error occurs, it returns -1 and assigns
           an error code to the external variable merror_code.

ERRORS

           MERROR_RANGE

COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology
       (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of
       the GNU Free Documentation License <http://www.gnu.org/licenses/fdl.html>.