References
Libraries
The direction of a text segment or buffer.
A segment can also be tested for horizontal or vertical orientation (irrespective of specific direction) with DIRECTION_IS_HORIZONTAL() or DIRECTION_IS_VERTICAL().
DIRECTION_IS_HORIZONTAL()
DIRECTION_IS_VERTICAL()
Text is set vertically from bottom to top.
Initial, unset direction.
Text is set horizontally from left to right.
Text is set horizontally from right to left.
Text is set vertically from top to bottom.
direction_t.BTT
direction_t.INVALID
direction_t.LTR
direction_t.RTL
direction_t.TTB