Figure element image from memory, not disk

Aspose.PDF Product Family
1

I am trying to create a tagged PDF programmatically that includes images that need alt text. I have been following the guides/references to get the taggedContent and create a figure element.

My problem is that the SetImage() method appears to require an image file on disk (needing a string path to the image). I do not see any support for handing it a stream (have the image in memory). Is there support for using a in-memory image instead of one from disk?

2

@trstephenerickson

Currently, the SetImage() method in Aspose.PDF requires a file path to an image on disk, and there is no direct support for using an in-memory image stream. To work around this limitation, you can save the in-memory image to a temporary file and then use that file path with the SetImage() method.

Here’s a simple example in C#:

using Aspose.Pdf;
using System.IO;

// Create a new PDF document
Document pdfDocument = new Document();

// Create a figure element
Figure figure = new Figure();

// Assume 'imageStream' is your in-memory image stream
using (FileStream tempFile = new FileStream("tempImage.png", FileMode.Create, FileAccess.Write))
{
    imageStream.CopyTo(tempFile);
}

// Set the image from the temporary file
figure.SetImage("tempImage.png");

// Add alt text
figure.AlternativeText = "Your alt text here";

// Add the figure to the document
pdfDocument.Pages[1].Paragraphs.Add(figure);

// Save the document
pdfDocument.Save("output.pdf");

// Clean up the temporary file
File.Delete("tempImage.png");

This code snippet demonstrates how to create a temporary file from your in-memory image and then use it to set the image in the PDF. After saving the PDF, it cleans up by deleting the temporary file.