Value 0 is reserved.
If set, this flag indicates that the outline's field arrays (i.e. `points', `flags' & `contours') are `owned' by the outline object, and should thus be freed when it is destroyed.
By default, outlines are filled using the non-zero winding rule. If set to 1, the outline will be filled using the even-odd fill rule (only works with the smooth raster).
By default, outside contours of an outline are oriented in clock-wise direction, as defined in the TrueType specification. This flag is set if the outline uses the opposite direction (typically for Type 1 fonts). This flag is ignored by the scan-converter. However, it is very important for the auto-hinter.
By default, the scan converter will try to detect drop-outs in an outline and correct the glyph bitmap to ensure consistent shape continuity. If set, this flag hints the scan-line converter to ignore such cases.
This flag indicates that the scan-line converter should try to convert this outline to bitmaps with the highest possible quality. It is typically set for small character sizes. Note that this is only a hint, that might be completely ignored by a given scan-converter.
This flag is set to force a given scan-converter to only use a single pass over the outline to render a bitmap glyph image. Normally, it is set for very large character sizes. It is only a hint, that might be completely ignored by a given scan-converter.