Currently, ImageGear for C and C++ does not support loading and saving multi-page documents (HMIGEAR) to and from memory buffers. For PDF documents, there is only the file-based interface, IG_mpi_file_open and IG_mpi_file_save, for loading and saving.
It would be nice if ImageGear for C and C++ supports loading and saving multi-page pdf from memory buffers as well.
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This would be a very useful feature when dealing with encrypted PDF files. Currently, a decrypted copy has to be created on disk before ImageGear can work with the data.
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