| Value | Meaning |
|---|---|
| CAIRO_EXTEND_NONE | pixels outside of the source pattern are fully transparent |
| CAIRO_EXTEND_REPEAT | the pattern is tiled by repeating |
| CAIRO_EXTEND_REFLECT | the pattern is tiled by reflecting at the edges (Implemented for surface patterns since 1.6) |
| CAIRO_EXTEND_PAD | pixels outside of the pattern copy the closest pixel from the source (Since 1.2; but only implemented for surface patterns since 1.6) |
cairo_extend_t is used to describe how pattern color/alpha will be determined for areas "outside" the pattern's natural area, (for example, outside the surface bounds or outside the gradient geometry).
The default extend mode is CAIRO_EXTEND_NONE for surface patterns and CAIRO_EXTEND_PAD for gradient patterns.
New entries may be added in future versions.