In this tutorial, we will learn how to read PDF file in C++. You can extract text or images from any page or whole document of the PDF file with simple API calls in C++. The feature is not dependent on Adobe Acrobat or any application for reading PDF on Windows or Linux platforms.
Steps to Read PDF File in C++
- Install the Aspose.Pdf for C++ from NuGet package manager tool
- Add the reference to Aspose::Pdf namespace
- Load input PDF using Document Class
- Initialize a TextFragmentAbsorber class instance
- Print the extracted text on console
- Iterate through each page and image of document
- Save the extracted output image as a JPG file
You can open and read pdf file in C++ with few simple lines of code. It can efficiently extract all the text and images from the PDF file.
Code to Read PDF File in C++
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #pragma once | |
| #include <iostream> | |
| #include <system/smart_ptr.h> | |
| #include <Aspose.PDF.Cpp/License.h> | |
| #include <Aspose.PDF.Cpp/Document.h> | |
| #include <Aspose.PDF.Cpp/Page.h> | |
| #include <Aspose.PDF.Cpp/PageCollection.h> | |
| #include <Aspose.PDF.Cpp/Resources.h> | |
| #include <Aspose.PDF.Cpp/XImageCollection.h> | |
| #include <Aspose.PDF.Cpp/XImage.h> | |
| #include <Aspose.PDF.Cpp/Text/TextFragmentAbsorber.h> | |
| #include <system/console.h> | |
| #include <system/io/file.h> | |
| #include <drawing/imaging/image_format.h> | |
| using namespace System; | |
| using namespace Aspose::Pdf; | |
| class ReadPDFEx { | |
| public: | |
| static void ReadPDF() | |
| { | |
| // Set the license for Aspose.PDF for CPP to Read PDF file | |
| SharedPtr<License> ReadPdfLicense = System::MakeObject<License>(); | |
| ReadPdfLicense->SetLicense(u"Aspose.PDF.NET.lic"); | |
| // Load input PDF file with Document class object | |
| SharedPtr<Document> doc = MakeObject<Document>(u"Test.pdf"); | |
| // Initialize a TextFragmentAbsorber class instance | |
| SharedPtr<Aspose::Pdf::Text::TextFragmentAbsorber> absorber = MakeObject<Aspose::Pdf::Text::TextFragmentAbsorber>(); | |
| doc->get_Pages()->Accept(absorber); | |
| // Print the extracted text on console | |
| System::Console::WriteLine(absorber->get_Text()); | |
| // Set the image counter variable | |
| int ImageCount = 1; | |
| // Iterate through each page of the PDF document | |
| for (SharedPtr<Page> page : doc->get_Pages()) | |
| { | |
| // Iterate through all the images | |
| for (SharedPtr<XImage> image : page->get_Resources()->get_Images()) | |
| { | |
| // Initialize an object of the FileStream type | |
| System::SharedPtr<System::IO::FileStream> outputImage = | |
| System::IO::File::Create(String::Format(u"Image{0}.jpg", ImageCount)); | |
| // Save the output image | |
| image->Save(outputImage, System::Drawing::Imaging::ImageFormat::get_Jpeg()); | |
| // Close the FileStream | |
| outputImage->Close(); | |
| ImageCount++; | |
| } | |
| } | |
| } | |
| }; |
In the previous topic, we explored How to Flatten PDF Form Fields in C#. This topic focuses on how to read text from PDF file in C++.
