NAME
        textextent -- determine raster extent of text data. (v36)

   SYNOPSIS
        TextExtent(rp, string, count, textExtent)
                   A1  A0      D0:16  A2

        void textExtent(struct rastport *, strptr, word,
             struct textextent *);

   FUNCTION
        This function determines a more complete metric of the space
        that a text string would render into than the textlength()
        function.

   INPUTS
        rp     - a pointer to the rastport which describes where the
                 text attributes reside.
        string - the address of the string to determine the length of.
        count  - the number of characters in the string.
                If zero, there are no characters in the string.
        textExtent - a structure to hold the result.

   RESULTS
        textExtent is filled in as follows:
            te_Width  - same as textlength() result: the rp_cp_x
                        advance that rendering this text would cause.
            te_Height - same as tf_YSize.  The height of the
                        font.
            te_Extent.MinX - the offset to the left side of the
                        rectangle this would render into.  Often zero.
            te_Extent.MinY - same as -tf_Baseline.  The offset
                        from the baseline to the top of the rectangle
                        this would render into.
            te_Extent.MaxX - the offset of the left side of the
                        rectangle this would render into.  Often the
                        same as te_Width-1.
            te_Extent.MaxY - same as tf_YSize-tf_Baseline-1.
                        The offset from the baseline to the bottom of
                        the rectangle this would render into.

   SEE ALSO
        textlength()  text()  textfit()
        graphics/text.h  graphics/rastport.h