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Aspose.Slides for C++ 25.12 Release Notes

This page contains release notes for Aspose.Slides for C++ 25.12

Supported Platforms

Aspose.Slides for C++ for Windows x64/x86 (Microsoft Visual Studio 2017 or later).
Aspose.Slides for C++ for Linux (Clang 3.9 or later, GCC 6.1 or later, glibc 2.23 or later).
Aspose.Slides for C++ for macOS x86_64/ARM64 (Xcode 13.4 or later).

New Features and Enhancements

Key	Summary	Category	Related Documentation
SLIDESNET-45078	Implement Aspose.Slides Plugins	Feature
SLIDESNET-45190	Populating data tags with data from another file	Feature	https://forum.aspose.com/t/powerpoint-populating-data-tags-with-data-from-another-file-in-c/320505
SLIDESNET-44993	Image is slightly shifted when converting a slide to an image	Enhancement	https://docs.aspose.com/slides/net/convert-slide/
SLIDESNET-45194	JoinPortionsWithSameFormatting carries over the “err” flag from the first text run	Enhancement
SLIDESNET-45176	Managing Guides on masters and slide layouts	Feature

Other Improvements and Changes

Key	Summary	Category	Related Documentation
SLIDESCPP-4093	Use Aspose.Slides for .NET 25.12 features	Enhancement	https://releases.aspose.com/slides/net/release-notes/2025/aspose-slides-for-net-25-12-release-notes/

Public API Changes

Added New Methods: IBasePortionFormat::get_SpellCheck(), IBasePortionFormat::set_SpellCheck()

The new methods, get_SpellCheck() and set_SpellCheck(), have been added to the IBasePortionFormat interface and implemented in the corresponding text formatting classes. This enhancement allows developers to enable or disable spell checking for individual text portions within a presentation.

Usage examples

The following code sample demonstrates how to use this property:

auto pres = System::MakeObject<Presentation>(u"input.pptx");

// Access the first portion of text inside the first shape on the first slide
auto portion = (System::ExplicitCast<AutoShape>(pres->get_Slide(0)->get_Shape(0)))->get_TextFrame()->get_Paragraph(0)->get_Portion(0);

// Enable spell checking for this text portion
portion->get_PortionFormat()->set_SpellCheck(true);

// Save the modified presentation
pres->Save(u"output-with-spellcheck.pptx", SaveFormat::Pptx);

Added New Method: get_DrawingGuides()

The new get_DrawingGuides() method has been added to the following interfaces and classes:

IMasterSlide
IMasterNotesSlide
IMasterHandoutSlide
ILayoutSlide
MasterSlide
MasterNotesSlide
MasterHandoutSlide
LayoutSlide

This method returns a collection of adjustable drawing guides for the slide.

Usage examples

The following code snippet shows how to add the new vertical drawing guide to the first master slide:

System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>();
System::Drawing::SizeF slideSize = pres->get_SlideSize()->get_Size();
System::SharedPtr<IDrawingGuidesCollection> guides = pres->get_Master(0)->get_DrawingGuides();

// Adding the new vertical drawing guide to the right of the slide center
guides->Add(Orientation::Vertical, slideSize.get_Width() / 2 + 20.0f);

pres->Save(u"MasterSlideDrawingGuides_out.pptx", SaveFormat::Pptx);

This code snippet demonstrates how to print the drawing guides of the first master slide:

System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>(u"MasterSlideDrawingGuides_out.pptx");
System::SharedPtr<IDrawingGuidesCollection> guides = pres->get_Master(0)->get_DrawingGuides();

for (auto&& guide : guides)
{
    System::Console::WriteLine(u"{0} {1} {2}", guide->get_Orientation(), guide->get_Position(), guide->get_Color());
}

Added New Methods: IDrawingGuide::get_Color(), IDrawingGuide::set_Color()

The get_Color() and set_Color() methods have been added to the IDrawingGuide interface and implemented in the DrawingGuide class. It allows developers to customize the color of drawing guides.

Usage examples

The following code snippet shows how to change the color of the first drawing guide of the master slide:

auto pres = System::MakeObject<Presentation>(u"MasterSlideDrawingGuides_out.pptx");
auto guides = pres->get_Master(0)->get_DrawingGuides();
guides->idx_get(0)->set_Color(System::Drawing::Color::get_ForestGreen());
pres->Save(u"MasterSlideDrawingGuides_ForestGreen.pptx", SaveFormat::Pptx);

Added New Methods: LowCode::Convert::ToJpeg, ToPng and ToTiff

New convenience methods ToJpeg, ToPng, and ToTiff have been added to the LowCode::Convert class. These methods simplify converting presentations into sets of raster images.

Usage examples

The following code snippet shows how to convert the input presentation to a set of JPEG images:

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
LowCode::Convert::ToJpeg(pres, u"presImage.jpeg");

This code snippet demonstrates how to convert the input presentation to a set of JPEG images of a given size:

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
LowCode::Convert::ToJpeg(pres, u"presImage.jpeg", System::Drawing::Size(720, 540));

This code snippet shows how to convert the input presentation to a set of PNG images in the Notes mode:

System::SharedPtr<IRenderingOptions> options = System::MakeObject<RenderingOptions>();
System::SharedPtr<NotesCommentsLayoutingOptions> slidesLayoutOptions = System::MakeObject<NotesCommentsLayoutingOptions>();
slidesLayoutOptions->set_NotesPosition(NotesPositions::BottomTruncated);
options->set_SlidesLayoutOptions(slidesLayoutOptions);

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
LowCode::Convert::ToPng(pres, u"presImage.png", 2.0f, options);

The following code shows how to convert the input presentation to a set of TIFF images:

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
LowCode::Convert::ToTiff(pres, u"presImage.tiff");

This code snippet shows how to convert the input presentation to a set of the compressed TIFF images in the Notes mode:

System::SharedPtr<ITiffOptions> options = System::MakeObject<TiffOptions>();
System::SharedPtr<NotesCommentsLayoutingOptions> slidesLayoutOptions = System::MakeObject<NotesCommentsLayoutingOptions>();
slidesLayoutOptions->set_NotesPosition(NotesPositions::BottomTruncated);
options->set_SlidesLayoutOptions(slidesLayoutOptions);
options->set_CompressionType(TiffCompressionTypes::CCITT3);

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
LowCode::Convert::ToTiff(pres, u"pres.tiff", options, false);

Added New Class: LowCode::Merger

The new LowCode::Merger class provides API methods for merging multiple presentations of the same format into a single output file.

API Overview

class Merger
{
public:
    static void Process(System::ArrayPtr<System::String> inputFileNames, System::String outputFileName);
    static ASPOSE_SLIDES_SHARED_API void Process(System::ArrayPtr<System::String> inputFileNames, System::String outputFileName, System::SharedPtr<ISaveOptions> options);
    static ASPOSE_SLIDES_SHARED_API void Process(System::ArrayPtr<System::String> inputFileNames, System::SharedPtr<System::IO::Stream> outputStream);
    static ASPOSE_SLIDES_SHARED_API void Process(System::ArrayPtr<System::String> inputFileNames, System::SharedPtr<System::IO::Stream> outputStream, System::SharedPtr<ISaveOptions> options);
};

Usage examples

The following code snippet shows how to merge the set of input presentations of the same format into a single presentation file:

LowCode::Merger::Process(System::MakeArray<System::String>({u"pres1.ppt", u"pres2.ppt"}), u"merged.ppt");

This code snippet demonstrates how to merge the set of input presentations into the PPTX presentation without generation of the new thumbnail:

auto pptxOptions = System::MakeObject<PptxOptions>();
pptxOptions->set_RefreshThumbnail(false);
LowCode::Merger::Process(System::MakeArray<System::String>({u"pres1.pptx", u"pres2.pptx"}), u"merged.pptx", pptxOptions);

The following code snippet shows how to merge the set of input presentations of the same format and save to the memory stream:

auto stream = System::MakeObject<System::IO::MemoryStream>();
LowCode::Merger::Process(System::MakeArray<System::String>({u"pres1.ppt", u"pres2.ppt"}), stream);