How to load the pdf file from stream or byte[]?

[DorianRudolph]

I'm just evaluating this library for myself and it seems like you can use FPDF_LoadCustomDocument or FPDF_LoadMemDocument.

[DJGosnell]

I've added a new test for this usage. https://github.com/Dtronix/PDFiumCore/blob/500c04c5586538918d0fe382e90392b96fbb6aba/src/PDFiumCore.Tests/FpdfviewTests.cs#L35-L49