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Prepares the signature builder.
void Prepare(GcPdfDocument doc, out string filter, out string subFilter, out int approximateSize, out object customData)
| Type | Name | Description |
|---|---|---|
| GcPdfDocument | doc | The GcPdfDocument object to sign. |
| string | filter | OUT: The name of the preferred signature handler to use when validating this signature. |
| string | subFilter | OUT: The name that describes the encoding of the signature value and key information in the signature dictionary. |
| int | approximateSize | OUT: The approximate size of the signature. |
| object | customData | OUT: The custom data that is passed to the Build(GcPdfDocument, Stream, object) method. |