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 rectanangle this would render into.

SEE ALSO
    TextLength()  Text()  TextFit()
    graphics/text.h  graphics/rastport.h