Modern API

Introduction

Currently, the Aspose.Slides for C++ library has dependencies in its public API on the following classes from System::Drawing:

As of version 24.4, this public API is declared deprecated.

In order to get rid of dependencies on System::Drawing in the public API, we added the so-called “Modern API”. Methods with System::Drawing::Image and System::Drawing::Bitmap are declared deprecated and will be replaced with the corresponding methods from the Modern API. Methods with System::Graphics are declared deprecated and their support will be removed from the public API.

Removal of the deprecated public API with dependencies on System::Drawing will be in release 24.8.

Modern API

Added the following classes and enums to the public API:

Aspose::Slides::IImage - represents the raster or vector image.
Aspose::Slides::ImageFormat - represents the file format of the image.
Aspose::Slides::Images - methods to instantiate and work with the IImage interface.

A typical scenario of using the new API may look as follows:

System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>();
        
// instantiate a disposable instance of IImage from the file on the disk.  
System::SharedPtr<IImage> image = Images::FromFile(u"image.png");
            
// create a PowerPoint image by adding an instance of IImage to the presentation's images.
System::SharedPtr<IPPImage> ppImage = pres->get_Images()->AddImage(image);
        
// add a picture shape on the slide #1
pres->get_Slide(0)->get_Shapes()->AddPictureFrame(Aspose::Slides::ShapeType::Rectangle, 10.0f, 10.0f, 100.0f, 100.0f, ppImage);
        
// get an instance of the IImage representing slide #1.
auto slideImage = pres->get_Slide(0)->GetImage(System::Drawing::Size(1920, 1080));

// save the image on the disk.
slideImage->Save(u"slide1.jpeg", Aspose::Slides::ImageFormat::Jpeg);

Replacing old code with Modern API

For ease of transition, the interface of the new IImage repeats the separate signatures of the Image and Bitmap classes. In general, you will just need to replace the call to the old method using System::Drawing with the new one.

Getting a slide thumbnail

Code using a deprecated API:

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

pres->get_Slide(0)->GetThumbnail()->Save(u"slide1.png");

Modern API:

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

pres->get_Slide(0)->GetImage()->Save(u"slide1.png");

Getting a shape thumbnail

Code using a deprecated API:

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

pres->get_Slide(0)->get_Shape(0)->GetThumbnail()->Save(u"shape.png");

Modern API:

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

pres->get_Slide(0)->get_Shape(0)->GetImage()->Save(u"shape.png");

Getting a presentation thumbnail

Code using a deprecated API:

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

auto bitmaps = pres->GetThumbnails(System::MakeObject<RenderingOptions>(), System::Drawing::Size(1980, 1028));

for (int32_t index = 0; index < bitmaps->get_Length(); index++)
{
    System::SharedPtr<System::Drawing::Bitmap> thumbnail = bitmaps[index];
    thumbnail->Save(System::String::Format(u"slide_{0}.png", index), System::Drawing::Imaging::ImageFormat::get_Png());
}

Modern API:

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

auto images = pres->GetImages(System::MakeObject<RenderingOptions>(), System::Drawing::Size(1980, 1028));

for (int32_t index = 0; index < images->get_Length(); index++)
{
    System::SharedPtr<IImage> thumbnail = images[index];
    thumbnail->Save(System::String::Format(u"slide_{0}.png", index), Aspose::Slides::ImageFormat::Png);
}

Adding a picture to a presentation

Code using a deprecated API:

System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>();

System::SharedPtr<System::Drawing::Image> image = System::Drawing::Image::FromFile(u"image.png");

System::SharedPtr<IPPImage> ppImage = pres->get_Images()->AddImage(image);

pres->get_Slide(0)->get_Shapes()->AddPictureFrame(Aspose::Slides::ShapeType::Rectangle, 10.0f, 10.0f, 100.0f, 100.0f, ppImage);

Modern API:

System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>();

System::SharedPtr<Aspose::Slides::IImage> image = Aspose::Slides::Images::FromFile(u"image.png");

System::SharedPtr<IPPImage> ppImage = pres->get_Images()->AddImage(image);

pres->get_Slide(0)->get_Shapes()->AddPictureFrame(Aspose::Slides::ShapeType::Rectangle, 10.0f, 10.0f, 100.0f, 100.0f, ppImage);

Methods/properties to be removed and their replacement in Modern API

Presentation Class

Method Signature	Replacement Method Signature
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options)	GetImages(System::SharedPtr<Export::IRenderingOptions> options)
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides)	GetImages(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides)
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options, float scaleX, float scaleY)	GetImages(System::SharedPtr<Export::IRenderingOptions> options, float scaleX, float scaleY)
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides, float scaleX, float scaleY)	GetImages(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides, float scaleX, float scaleY)
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options, System::Drawing::Size imageSize)	GetImages(System::SharedPtr<Export::IRenderingOptions> options, System::Drawing::Size imageSize)
GetThumbnails(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides, System::Drawing::Size imageSize)	GetImages(System::SharedPtr<Export::IRenderingOptions> options, System::ArrayPtr<int32_t> slides, System::Drawing::Size imageSize)
Save(System::String fname, System::ArrayPtr<int32_t> slides, Export::SaveFormat format)	Will be deleted completely
Save(System::String fname, System::ArrayPtr<int32_t> slides, Export::SaveFormat format, System::SharedPtr<Export::ISaveOptions> options)	Will be deleted completely

Slide Class

Method Signature	Replacement Method Signature
GetThumbnail()	GetImage()
GetThumbnail(float scaleX, float scaleY)	GetImage(float scaleX, float scaleY)
GetThumbnail(System::Drawing::Size imageSize)	GetImage(System::Drawing::Size imageSize)
GetThumbnail(System::SharedPtr<Export::ITiffOptions> options)	GetImage(System::SharedPtr<Export::IRenderingOptions> options
GetThumbnail(System::SharedPtr<Export::IRenderingOptions> options)	GetImage(System::SharedPtr<Export::IRenderingOptions> options)
GetThumbnail(System::SharedPtr<Export::IRenderingOptions> options, float scaleX, float scaleY)	GetImage(System::SharedPtr<Export::IRenderingOptions> options, float scaleX, float scaleY)
GetThumbnail(System::SharedPtr<Export::IRenderingOptions> options, System::Drawing::Size imageSize)	GetImage(System::SharedPtr<Export::IRenderingOptions> options, System::Drawing::Size imageSize)
RenderToGraphics(System::SharedPtr<Export::IRenderingOptions> options, System::SharedPtr<System::Drawing::Graphics> graphics)	Will be deleted completely
RenderToGraphics(System::SharedPtr<Export::IRenderingOptions> options, System::SharedPtr<System::Drawing::Graphics> graphics, float scaleX, float scaleY)	Will be deleted completely
RenderToGraphics(System::SharedPtr<Export::IRenderingOptions> options, System::SharedPtr<System::Drawing::Graphics> graphics, System::Drawing::Size renderingSize)	Will be deleted completely

Shape Class

Method Signature	Replacement Method Signature
GetThumbnail()	GetImage()
GetThumbnail(ShapeThumbnailBounds bounds, float scaleX, float scaleY)	GetImage(ShapeThumbnailBounds bounds, float scaleX, float scaleY)

ImageCollection Class

Method Signature	Replacement Method Signature
AddImage(System::SharedPtr<System::Drawing::Image> image)	AddImage(System::SharedPtr<IImage> image)

PPImage Class

Method Signature	Replacement Method Signature
ReplaceImage(System::SharedPtr<System::Drawing::Image> newImage)	ReplaceImage(System::SharedPtr<Aspose::Slides::IImage> newImage)
get_SystemImage()	get_Image()

PatternFormat Class

Method Signature	Replacement Method Signature
GetTileImage(System::Drawing::Color background, System::Drawing::Color foreground)	GetTile(System::Drawing::Color background, System::Drawing::Color foreground)
GetTileImage(System::Drawing::Color styleColor)	GetTile(System::Drawing::Color styleColor)

IPatternFormatEffectiveData Class

Method Signature	Replacement Method Signature
GetTileImage(System::Drawing::Color background, System::Drawing::Color foreground)	GetTileIImage(System::Drawing::Color background, System::Drawing::Color foreground)

API support for System::Drawing::Graphics will be discontinued

Methods with System::Drawing::Graphics are declared deprecated and their support will be removed from the public API.

The part of the API that uses it will be removed:

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