| Value | Description |
|---|---|
| iextWantExactSize | If included, the thumbnail will be scaled to LoadWidth x LoadHeight (SIIGBF_RESIZETOFIT, SIIGBF_SCALEUP). Otherwise a bigger image may be used to improve performance (SIIGBF_BIGGERSIZEOK) |
| iextAllowIcons | Allows an icon to be returned for file types that do not have a thumbnail. If not included, the method will fail for file types without an icon (SIIGBF_THUMBNAILONLY) |
| iextCropToSquare | The thumbnail will be cropped to be square (SIIGBF_CROPTOSQUARE) |
| iextWideThumbnails | The thumbnail will be stretched and cropped to a 0.7 aspect ratio (SIIGBF_WIDETHUMBNAILS) |
| iextIgnoreAlpha | If specified, transparency in the thumbnail is ignored |