Working with Images

Extract All Images From a Visio Page

In Microsoft Visio, pages are either foreground or background pages. You can extract images from a particular page of a Visio file.

Extract Images

The Page Class object represents the drawing area of a foreground page or a background page. The Shapes property exposed by the Diagram class supports a collection of Aspose.Diagram.Shape objects. This property can be used to extract all the images from a particular page.

Extract Images Programming Sample

The following piece of code extracts all images from a particular Visio page.

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(ExtractAllImagesFromPage.class);
// call a Diagram class constructor to load a VSD diagram
Diagram diagram = new Diagram(dataDir + "ExtractAllImagesFromPage.vsd");

// Enter page index i.e. 0 for first one
for (Shape shape : (Iterable<Shape>) diagram.getPages().getPage(0).getShapes())
{
    // Filter shapes by type Foreign
    if (shape.getType() == TypeValue.FOREIGN)
    {
        FileOutputStream fos = new FileOutputStream(dataDir+ "ExtractAllImages" + shape.getID() + "_Out.bmp");
        fos.write(shape.getForeignData().getValue());
        fos.close();
    }
}

Get Icons of Various Visio Shapes

Aspose.Diagram for Java API now allows developers to get icons of various Visio shapes. 

Getting the Shape Icon

The code in the samples below show how to:

1. Load an existing diagram or stencil.
2. Get master by its index
3. Get master icon. 
4. Save icon to the local space.

Get Icons Programming Sample

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(GetShapeIcon.class);  
// Load stencil file to a diagram object
Diagram stencil = new Diagram(dataDir + "Timeline.vss");
// get master
Master master = stencil.getMasters().getMasterByName("Triangle");
// get byte array
byte[] bytes = master.getIcon();
// create an image file
FileOutputStream fos = new FileOutputStream(dataDir + "MasterIcon_Out.png");
// write byte array of the image
fos.write(bytes);
// close array
fos.close();

Replace a Picture Shape of the Visio Diagram

Aspose.Diagram for Java API allows developers to access and replace available picture shapes in the Visio diagram.

Replacing a Picture Shape

The code in the samples below show how to:

1. Load an existing diagram.
2. Iterate through the selective page shapes.
3. Apply filter to get picture shapes.
4. Save resultant Visio diagram to the local space.

Replace a Picture Shape Programming Sample

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(ReplaceShapePicture.class); 
// call a Diagram class constructor to load the VSD diagram
Diagram diagram = new Diagram(dataDir + "ExtractAllImagesFromPage.vsd");
        
// convert image into bytes array       
File fi = new File(dataDir + "Picture.png");
byte[] fileContent = Files.readAllBytes(fi.toPath());
		
// Enter page index i.e. 0 for first one
for (Shape shape : (Iterable<Shape>) diagram.getPages().getPage(0).getShapes())
{
    // Filter shapes by type Foreign
    if (shape.getType() == TypeValue.FOREIGN)
    {
        //replace picture shape
    	shape.getForeignData().setValue(fileContent);
    }
}

// save diagram
diagram.save(dataDir + "ReplaceShapePicture_Out.vsdx", SaveFileFormat.VSDX);

Import Bitmap Image as a Visio Shape

Aspose.Diagram for Java API now allows developers to import a bitmap image as a Microsoft Visio shape.

Insert a BMP Image in Visio

The code in the samples below show how to:

1. Create a diagram.
2. Get Visio page
3. Import a bitmap image as a Visio shape
4. Save the diagram.

Insert a BMP Image Programming Sample

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(ExtractAllImagesFromPage.class);
// call a Diagram class constructor to load a VSD diagram
Diagram diagram = new Diagram(dataDir + "ExtractAllImagesFromPage.vsd");

// Enter page index i.e. 0 for first one
for (Shape shape : (Iterable<Shape>) diagram.getPages().getPage(0).getShapes())
{
    // Filter shapes by type Foreign
    if (shape.getType() == TypeValue.FOREIGN)
    {
        FileOutputStream fos = new FileOutputStream(dataDir+ "ExtractAllImages" + shape.getID() + "_Out.bmp");
        fos.write(shape.getForeignData().getValue());
        fos.close();
    }
}