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Aspose.PDF for C++

 
 

Create, Edit & Convert PDF Files via C++ API

Leading C++ API for Working with PDF Files, allows Software Professional to Generate, Modify, Merge/Split, Extract & Convert PDF Files.

What is Aspose.PDF for C++?

Harness the capabilities of a robust C++ PDF API to seamlessly create PDF files from scratch and manipulate them without requiring Adobe Acrobat. Aspose.PDF for C++ is a powerful native library that empowers developers to build both 32-bit and 64-bit applications, functioning with high performance on both client and server sides. Its intuitive design simplifies the implementation of advanced features, providing a comprehensive toolkit for all your PDF generation needs directly within your C++ environment.

Beyond creation, this versatile library offers an extensive suite of document processing commands. You can efficiently merge PDF files, split PDF files, and convert PDF files into various formats. It supports a wide array of manipulations including adding text, images, watermarks, and bookmarks, managing form fields, and applying robust security with passwords and digital signatures. With additional features for compression, optimization, and detailed formatting control, Aspose.PDF for C++ delivers a complete solution for producing professional, secure, and optimized PDF documents.

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Getting Started with Aspose.PDF for C++

The recommend way to install Aspose.PDF for C++ is using NuGet. Please use the following command for a smooth installation.

Install Aspose.PDF for C++ via NuGet

NuGet\Install-Package Aspose.PDF -prerelease

You can also download it directly from Aspose PDF product page.

PDF Files Generation & Editing via C++ API

Aspose.PDF for C++ has included complete support for PDF document creation, reading, and modifications inside C++ applications without the need of any other software installed on the user's machine. The library offers simple and intuitive methods for PDF creation, which makes it easy for developers to add and remove pages, add text, images, and other elements to a new document. The library has also provided various methods for opening existing PDF documents such as opening documents by specifying a file name, opening a document from the stream, opening an encrypted document, opening a document from a memory buffer, and more.

How to Create PDF Files via C++ API?

 void CreatePDF() {
    // String for path name.
    String _dataDir("C:\\Samples\\");

    // String for file name.
    String filename("sample-new.pdf");

    // Initialize document object
    auto document = MakeObject();
    // Add page
    auto page = document->get_Pages()->Add();

    // Add text to new page
    auto textFragment = MakeObject(u"Hello World!");
    page->get_Paragraphs()->Add(textFragment);

    // Save updated PDF
    String outputFileName = _dataDir + filename;

    document->Save(outputFileName);
}

How to Secure PDF Files via C++ API?

Aspose.PDF for C++ has provided various important features for securing PDF documents inside C++ applications. It supports protect sensitive information inside PDF files by applying passwords as well as by using digital signatures. It is also possible to change the password of an existing PDF and also determine if the source PDF is password protected. The library also allows to encrypt and decrypt PDF documents with a just a couple of lines of code. You can set privileges like restricting users from changing the content of a document, extract image or text from the PDF file and only allows screen reading and so on.

How to Set Privileges of PDF File via C++ API?

 void SecuringAndSigning::SetPrivilegesOnExistingPDF() {
    // String for path name.
    String _dataDir("C:\\Samples\\");

    // Load a source PDF file
    auto document = MakeObject(_dataDir + u"input.pdf");

    // Instantiate Document Privileges object

    // Apply restrictions on all privileges
    auto documentPrivilege = DocumentPrivilege::get_ForbidAll();
    // Only allow screen reading
    documentPrivilege->set_AllowScreenReaders(true);

    // Encrypt the file with User and Owner password.
    // Need to set the password, so that once the user views the file with user password,

    // Only screen reading option is enabled
    document->Encrypt(u"user", u"owner", documentPrivilege, CryptoAlgorithm::AESx128, false);

    // Save updated document
    document->Save(_dataDir + u"SetPrivileges_out.pdf");
}

PDF Documents Conversion via C++ API

Aspose.PDF for C++ makes is easy for software developers to easily convert PDF documents to several other supported file formats inside their own C++ applications. The library has provided support for PDF files conversion to various popular formats, as well as conversion from other formats to PDF. You can convert PDF to Word documents, PowerPoint presentations, Microsoft Excel (XLSX, ODS, CSV and SpreadSheetML), EPUB, XPS, Postscript, text, PDF/A, and many other file formats. The library also has included strong support converting images to PDF as well as converting PDF pages as images in JPEG, PNG and other formats.

How to Convert PDF to XLS in C++ Apps?

void ConvertPDFtoExcel()
{
    std::clog << __func__ << ": Start" << std::endl;
    // String for path name
    String _dataDir("C:\\Samples\\Conversion\\");

    // String for file name
    String infilename("sample.pdf");
    String outfilename("PDFToExcel.xls");

    // Open document
    auto document = MakeObject(_dataDir + infilename);

    try {
    // Save the output in XLS format
    document->Save(_dataDir + outfilename, SaveFormat::Excel);
    }
    catch (Exception ex) {
    std::cerr << ex->get_Message();
    }
    std::clog << __func__ << ": Finish" << std::endl;
}

Optimize PDF Documents via C++ API

Aspose.PDF for C++ API has provided full support for PDF documents optimization inside C++ applications. The PDF optimization is mostly about reducing the size of PDFs to enhance their loading speed. The library is using various techniques for documents optimization such as page shrink or compresses all images, reusing page content, duplicate streams merging, un-embed fonts, removal of unused objects and form fields, flatten annotations removal and so on. Moreover, it also supports optimizing the content of your PDF document for better ranking in search engines.

How to Compress Images in PDF via C++ Library?

void CompressImage() {
    // String for path name
    String _dataDir("C:\\Samples\\");

    // String for input file name
    String infilename("ShrinkDocument.pdf");
    String outfilename("ShrinkDocument_out.pdf");

    // Open document
    auto document = MakeObject(_dataDir + infilename);

    // Initialize OptimizationOptions
    auto optimizationOptions = MakeObject();

    // Set CompressImages option
    optimizationOptions->get_ImageCompressionOptions()->set_CompressImages(true);
    // Set ImageQuality option
    optimizationOptions->get_ImageCompressionOptions()->set_ImageQuality(50);

    // Optimize PDF document using OptimizationOptions
    document->OptimizeResources(optimizationOptions); 
    // Save updated document
    document->Save(_dataDir + outfilename);
}
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