Flags used in the text API.
Values:
| IG_PDE_TEXT_RUN | 0x0001 | Specifies an action for the run. |
| IG_PDE_TEXT_CHAR | 0x0002 | Specifies an action for single character. |
| IG_PDE_TEXT_PAGE_SPACE | 0x0004 | Specifies user space. |
| IG_PDE_TEXT_GET_BOUNDS | 0x0008 | Specifies using the font descriptor's FontBBox. |