These constants define text alignment.
Values:
| IG_VECT_ALIGN_DEFAULT | Default alignment. |
| IG_VECT_ALIGN_X_LEFT | x left alignment. |
| IG_VECT_ALIGN_X_CENTER | x center alignment. |
| IG_VECT_ALIGN_X_RIGHT | x right alignment. |
| IG_VECT_ALIGN_Y_TOP | y top alignment. |
| IG_VECT_ALIGN_Y_CENTER | y center alignment. |
| IG_VECT_ALIGN_Y_BOTTOM | y bottom alignment. |
| IG_VECT_ALIGN_Y_BASELINE | Base line alignment. |
| IG_VECT_ALIGN_CONTINUOUSX | The additional align point is used for x alignment. |
| IG_VECT_ALIGN_CONTINUOUSY | The additional align point is used for y alignment. |
| IG_VECT_RESTRICT | The flag defining that the text is restricted. |
| IG_VECT_RESTRICT_BASIS | The text is exactly restricted in the restrict box by the base line. |
| IG_VECT_RESTRICT_BOXED_CAP | The text is exactly restricted in the restrict box by the bottom. |
| IG_VECT_RESTRICT_BOXED_ALL | The same as IG_VECT_RESTRICT_BASIS at the moment. |
| IG_VECT_RESTRICT_ISOTROPIC_CAP | Isotropic restriction in the restrict box by the bottom. |
| IG_VECT_RESTRICT_ISOTROPIC_ALL | Isotropic restriction in the restrict box by the base line. |
| IG_VECT_RESTRICT_JUSTIFIED | The text is justified inside the restriction box using variable spacing. |