Working with Image Placement

With the release of Aspose.PDF for .NET 7.0.0, we introduced classes called ImagePlacement, ImagePlacementAbsorber and ImagePlacementCollection which provide similar capability as the classes described above to get an image’s resolution and position in a PDF document.

• ImagePlacementAbsorber performs image usage search as the ImagePlacement objects collection.
• ImagePlacement provides the members Resolution and Rectangle that return actual image placement values.

The next code snippet also works with Aspose.Drawing library.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.PDF-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_Images();

// Load the source PDF document
Aspose.Pdf.Document doc = new Aspose.Pdf.Document(dataDir+ "ImagePlacement.pdf");
ImagePlacementAbsorber abs = new ImagePlacementAbsorber();
           
// Load the contents of first page
doc.Pages[1].Accept(abs);
foreach (ImagePlacement imagePlacement in abs.ImagePlacements)
{
    // Get image properties
    Console.Out.WriteLine("image width:" + imagePlacement.Rectangle.Width);
    Console.Out.WriteLine("image height:" + imagePlacement.Rectangle.Height);
    Console.Out.WriteLine("image LLX:" + imagePlacement.Rectangle.LLX);
    Console.Out.WriteLine("image LLY:" + imagePlacement.Rectangle.LLY);
    Console.Out.WriteLine("image horizontal resolution:" + imagePlacement.Resolution.X);
    Console.Out.WriteLine("image vertical resolution:" + imagePlacement.Resolution.Y);

    // Retrieve image with visible dimensions
    Bitmap scaledImage;
    using (MemoryStream imageStream = new MemoryStream())
    {
        // Retrieve image from resources
        imagePlacement.Image.Save(imageStream, System.Drawing.Imaging.ImageFormat.Png);
        Bitmap resourceImage = (Bitmap)Bitmap.FromStream(imageStream);
        // Create bitmap with actual dimensions
        scaledImage = new Bitmap(resourceImage, (int)imagePlacement.Rectangle.Width, (int)imagePlacement.Rectangle.Height);
    }
}