| Value | Meaning |
|---|---|
| LTR0 | A strong left-to-right direction |
| RTL1 | A strong right-to-left direction |
| TTB_LTR2 | Deprecated value; treated the same as %PANGO_DIRECTION_RTL. |
| TTB_RTL3 | Deprecated value; treated the same as %PANGO_DIRECTION_LTR |
| WEAK_LTR4 | A weak left-to-right direction |
| WEAK_RTL5 | A weak right-to-left direction |
| NEUTRAL6 | No direction specified |
The #PangoDirection type represents a direction in the Unicode bidirectional algorithm; not every value in this enumeration makes sense for every usage of #PangoDirection; for example, the return value of pango_unichar_direction() and pango_find_base_dir() cannot be %PANGO_DIRECTION_WEAK_LTR or %PANGO_DIRECTION_WEAK_RTL, since every character is either neutral or has a strong direction; on the other hand %PANGO_DIRECTION_NEUTRAL doesn't make sense to pass to pango_itemize_with_base_dir().
The %PANGO_DIRECTION_TTB_LTR, %PANGO_DIRECTION_TTB_RTL values come from an earlier interpretation of this enumeration as the writing direction of a block of text and are no longer used; See #PangoGravity for how vertical text is handled in Pango.