Underline, Overline and Strikeout Text are set using a call to
PDF_set_parameter().
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| 0 | Normal | 4 | Normal Text - add to clipping path |
1 | Stroke text (outline) | 5 | Stroke text - add to clipping path |
2 | Fill and stroke text | 6 | Fill and stroke text - add to clipping path |
3 | Invisible Text | 7 | Invisible text - add to clipping path |