Render MHTML to OTP within C++ Applications
Convert MHTML to OTP within your C++ Applications without using Microsoft® PowerPoint
Why to Convert MHTML to OTP?
MHTML (MIME HTML) is a web page archive format used to save web pages for offline viewing. It is a combination of HTML code and resources such as images, audio, and video. On the other hand, OTP (OpenDocument Presentation Template) is an open standard for electronic documents. It is used to create presentations and is supported by many applications. Therefore, it is necessary to convert MHTML to OTP in order to make the web page content available in a format that can be used by multiple applications.
How Aspose.Total Helps for MHTML to OTP Conversion?
Aspose.Total for C++ is a comprehensive package of APIs that enables developers to create, manipulate, and convert documents in various formats. It includes Aspose.PDF for C++ and Aspose.Slides for C++, which can be used to convert MHTML to OTP. To do this, firstly, you can export MHTML to PPTX by using Aspose.PDF for C++. Secondly, by using Aspose.Slides for C++, you can convert PPTX to OTP. Both APIs come under Aspose.Total for C++ package. Therefore, developers can easily integrate MHTML to OTP conversion feature inside their C++ applications by using Aspose.Total for C++.
C++ API to Export MHTML to OTP
- Open MHTML file using Document class reference
- Convert MHTML to PPTX by using Save method function
- Load PPTX document by using Presentation class reference
- Save the document to OTP format using
Save
member function and set
Otpas SaveFormat
Get Started with C++ File Automation APIs
Install from command line as nuget install Aspose.Total.Cpp or via Package Manager Console of Visual Studio with Install-Package Aspose.Total.Cpp.
Alternatively, get the offline MSI installer or DLLs in a ZIP file from downloads .
// load MHTML file with an instance of Document class
auto doc = MakeObject<Document>(u"template.mhtml");
// save MHTML as PPTX format
doc->Save(u"PptxOutput.pptx", SaveFormat::Pptx);
// instantiate a Presentation object that represents a PPTX file
SharedPtr<Presentation> prs = MakeObject<Presentation>(u"PptxOutput.pptx");
// save the presentation as Otp format
prs->Save(u"output.otp", Aspose::Slides::Export::SaveFormat::Otp);
Change Password of MHTML Document via C++
In the process of rendering MHTML to OTP, you can open a password protected MHTML and also change its password. In order to change the password of a MHTML file, you must know the owner password of that document. You can load password protected PDF document with Aspose.PDF for C++ by specifying its owner password and use ChangePasswords method to change the password.
// load an existing MHTML Document
auto doc = MakeObject<Document>(L"input.mhtml", L"owner");
// change password of MHTML Document
doc->ChangePasswords(L"owner", L"newuser", L"newuser");
// save the document
doc->Save(L"output.Doc");
Add Images From Web in OTP File via C++
After converting MHTML to OTP, you can also add images from web to your output document. Aspose.Slides for C++ supports operations with images in these popular formats: JPEG, PNG, BMP, GIF, and others. You can add one or several images on your computer onto a slide in a presentation. This sample code in C++ shows you how to add an image to a OTP file
// instantiate a Presentation object that represents a OTP file
auto pres = System::MakeObject<Presentation>("output.otp");
// get slide
auto slide = pres->get_Slides()->idx_get(0);
// initialize Web Client
auto webClient = System::MakeObject<WebClient>();
// get image data
auto imageData = webClient->DownloadData(System::MakeObject<Uri>(u"[REPLACE WITH URL]"));
// add image
auto image = pres->get_Images()->AddImage(imageData);
// add picture frame
slide->get_Shapes()->AddPictureFrame(ShapeType::Rectangle, 10.0f, 10.0f, 100.0f, 100.0f, image);
// save updated file
pres->Save(u"updated.otp", SaveFormat::Otp);