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Aspose.Slides for Python via .NET 25.1 Release Notes

New Features and Enhancements

KeySummaryCategoryRelated Documentation
SLIDESNET-42954Add support for importing embedded fonts from PDFFeature
SLIDESNET-43531Permanent method for SVG to EMF conversionFeaturehttps://docs.aspose.com/slides/net/image/#adding-svg-to-presentations
SLIDESNET-44626Extracting Office documents core, custom and extended propertiesFeaturehttps://docs.aspose.com/slides/net/presentation-properties/
SLIDESNET-44775Add an option to disable the generation of the thumbnail when saving a presentation in PPTX formatFeaturehttps://docs.aspose.com/slides/net/save-presentation/
SLIDESNET-41195Save slide to metafileFeaturehttps://products.aspose.com/slides/net/conversion/ppt-to-emf/
SLIDESNET-44655Find out if a presentation file is corrupted or notInvestigationhttps://docs.aspose.com/slides/net/manage-presentation/
SLIDESNET-44734Checking a PowerPoint presentation file for corruptionInvestigationhttps://docs.aspose.com/slides/net/manage-presentation/

Other Improvements and Changes

KeySummaryCategoryRelated Documentation
SLIDESPYNET-245Use Aspose.Slides for Net 25.1 featuresEnhancementhttps://releases.aspose.com/slides/net/release-notes/2025/aspose-slides-for-net-25-1-release-notes/

Public API Changes

Support for New Extended Properties of Presentation Documents

The HeadingPair class and IHeadingPair interface have been added. It represents a ‘Heading pair’ property of the document and stores the group name of document parts and the number of parts in this group.

Simplified code of IHeadingPair:

class IHeadingPair:
    @property
    def name(self) -> str:
        ...

    @property
    def count(self) -> int:
        ...

The following properties have also been added to the IDocumentProperties interface and the DocumentProperties class:

  • scale_crop property indicates the display mode of the document thumbnail;
  • links_up_to_date property indicates whether hyperlinks in a document are up-to-date;
  • hyperlinks_changed property specifies that one or more hyperlinks in this part were updated exclusively in this part by a producer;
  • slides read-only property specifies the total number of slides in a presentation document;
  • hidded_slides read-only property specifies the number of hidden slides in a presentation document;
  • notes read-only property specifies the number of slides in a presentation containing notes;
  • paragraphs read-only property specifies the total number of paragraphs found in a document if applicable;
  • words read-only property specifies the total number of words contained in a document;
  • multimedia_clips read-only property specifies the total number of sound or video clips that are present in the document;
  • titles_of_parts read-only property specifies the title of each document part;
  • heading_pairs read-only property indicates the grouping of document parts and the number of parts in each group;

The following code sample shows how to get and change the properties of a presentation document:

import aspose.slides as slides

with slides.Presentation("Metadata.pptx") as presentation:
    document_properties = presentation.document_properties

    # Print the read-only properties
    print("Slides:", document_properties.slides)
    print("HiddenSlides:", document_properties.hidden_slides)
    print("Notes:", document_properties.notes)
    print("Paragraphs:", document_properties.paragraphs)
    print("MultimediaClips:", document_properties.multimedia_clips)
    print("TitlesOfParts:", "; ".join(document_properties.titles_of_parts))
    print("HeadingPairs:")
    heading_pairs = document_properties.heading_pairs
    if len(heading_pairs) > 0:
        for heading_pair in heading_pairs:
            print(heading_pair.name, heading_pair.count)

    # Change several boolean properties
    document_properties.scale_crop = True
    document_properties.links_up_to_date = True
    document_properties.hyperlinks_changed = True

    # Save the presentation with changed properties
    presentation.save("Metadata-upd.pptx", slides.export.SaveFormat.PPTX)

Also, you can use the IPresentationInfo interface to read and change the document properties:

import aspose.slides as slides

document_info = slides.PresentationFactory.instance.get_presentation_info("Metadata.pptx")
document_properties = document_info.read_document_properties()

# Print the read-only properties
print("Slides:", document_properties.slides)
print("Paragraphs:", document_properties.paragraphs)
print("MultimediaClips:", document_properties.multimedia_clips)
print("TitlesOfParts:", " ".join(document_properties.titles_of_parts))

# Change several boolean properties
document_properties.scale_crop = True
document_properties.links_up_to_date = True
document_properties.hyperlinks_changed = True

# Save the presentation with changed properties
document_info.update_document_properties(document_properties)
document_info.write_binded_presentation("Metadata.pptx")

Option to Control Thumbnail Generation

A new property, refresh_thumbnail, has been added to the IPptxOptions interface and the PptxOptions class. It allows disabling the generation of a new thumbnail when saving a presentation in the PPTX format.

The following code sample shows how to save the PPTX presentation without generation of the new thumbnail:

import aspose.slides as slides

with slides.Presentation("demo.pptx") as pres:
    pptx_options = slides.export.PptxOptions()
    pptx_options.refresh_thumbnail = False

    pres.save("result_with_old_thumbnail.pptx", slides.export.SaveFormat.PPTX, pptx_options)

Method IPictureFillFormat.compress_image Has Been Added

An additional method, compress_image, has been added to the IPictureFillFormat interface and the PictureFillFormat class. It allows setting the target resolution for compression using a value from the PicturesCompression enum.

This method compresses an image by reducing its size based on the shape size and specified resolution, with the option to delete cropped areas. It adjusts the picture’s size and resolution similarly to PowerPoint’s Picture Format -> Compress Pictures -> Resolution feature. The following example demonstrates how to use the compress_image method to reduce the size of an image in a presentation by setting a target resolution and removing cropped areas:

import aspose.slides as slides

with slides.Presentation("demo.pptx") as pres:
    slide = pres.slides[0]

    # Get the PictureFrame from the slide
    pic_frame = slide.shapes[0]

    # Compress the image with a target resolution of 150 DPI (Web resolution) and remove cropped areas
    result = pic_frame.picture_format.compress_image(True, slides.export.PicturesCompression.DPI150)

    # Check the result of the compression
    if result:
        print("Image successfully compressed.")
    else:
        print("Image compression failed or no changes were necessary.")

Method ISlide.write_as_emf Has Been Added

A new method, write_as_emf, has been added to the ISlide interface and the Slide class. This method saving the slide content as an EMF file. The following code example demonstrates how to convert the first slide from a PowerPoint presentation into a metafile.

import aspose.slides as slides

with slides.Presentation("Presentation.pptx") as pres, open("Result.emf", "wb") as fs:
    # Saves the first slide as a metafille
    pres.slides[0].write_as_emf(fs)

Method ISvgImage.write_as_emf Has Been Added

A new method, write_as_emf, has been added to the ISvgImage interface and the SvgImage class. This method allows saving the SVG image as an EMF file. The following example demonstrates how to save the SVG image into a metafile.

This sample demonstrates how to add the SVG image as a metafile to the presentation image collection:

import aspose.slides as slides

# Creates the new SVG image
with open("content.svg", "rb") as f1, open("SvgAsEmf.emf", "wb") as f2:
    svg_image = slides.SvgImage(f1)
    svg_image.write_as_emf(f2)

This sample demonstrates how to add the SVG image as a metafile to the presentation image collection:

import aspose.slides as slides
import io

with slides.Presentation() as pres, open("content.svg", "rb") as fs:
    # Creates the new SVG image
    svg_image = slides.SvgImage(fs)

    b = io.BytesIO()
    # Saves the SVG image as a metafille
    svg_image.write_as_emf(b)
    b.seek(0)
    # Adds metafile to the image collection
    pres.images.add_image(b)