Gravity: South: Glyphs stand upright (default) East: Glyphs are rotated 90 degrees clockwise North: Glyphs are upside-down West: Glyphs are rotated 90 degrees counter-clockwise Auto: Gravity is resolved from the context matrix * The #PangoGravity type represents the orientation of glyphs in a segment of text. This is useful when rendering vertical text layouts. In those situations, the layout is rotated using a non-identity PangoMatrix, and then glyph orientation is controlled using #PangoGravity. Not every value in this enumeration makes sense for every usage of #PangoGravity; for example, %PANGO_GRAVITY_AUTO only can be passed to pango_context_set_base_gravity() and can only be returned by pango_context_get_base_gravity(). * See also: #PangoGravityHint *
GravityHint: Natural: scripts will take their natural gravity based on the base gravity and the script. This is the default. Strong: always use the base gravity set, regardless of the script. Line: for scripts not in their natural direction (eg. Latin in East gravity), choose per-script gravity such that every script respects the line progression. This means, Latin and Arabic will take opposite gravities and both flow top-to-bottom for example. * The #PangoGravityHint defines how horizontal scripts should behave in a vertical context. That is, English excerpt in a vertical paragraph for example. * See #PangoGravity. *