ContentStreamSafe
Content Streams and Optional Content Groups
Description
A page in a PDF document has one or more content stream parts that together contain all the PDF page description commands for the page.
This function determines if the content stream part that was selected using the
SelectContentStream function was created by loslab PDF Library or not.
Only content stream parts created by loslab PDF Library should be considered "safe" to drawn on. If a content stream part is not safe it would be best to combine all the content stream parts using the CombineContentStreams function before drawing on the page to prevent later errors in the document.
Syntax
Delphi
function TPDFlib.ContentStreamSafe: Integer;ActiveX
Function PDFlib::ContentStreamSafe As LongDLL
int DLContentStreamSafe(int InstanceID);Return values
| 0 | The layer was not created by loslab PDF Library and care should be taken when drawing onto this layer |
|---|---|
| 1 | The layer was created by loslab PDF Library and is safe to draw on |