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.NET Framework 4.5.2+

PdfGraphics.DrawImage(Stream, RectangleF) Method

Draws an image from a stream in the specified page rectangle. The image is scaled to fit the rectangle.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v22.2.Drawing.dll

NuGet Package: DevExpress.Pdf.Drawing

Declaration

public void DrawImage(
    Stream data,
    RectangleF bounds
)

Parameters

Name Type Description
data Stream

A stream with image data.

bounds RectangleF

A page area in world coordinate system where you can draw an image.

Remarks

This method renders an image with its original resolution (DPI). The following formats are available:

  • BMP
  • JPEG
  • PNG
  • EMF
  • EMF+
  • TIFF
  • GIF

The method’s dpiX and dpiY parameters do not affect image quality. They are used to convert world coordinates to page coordinates only.

If you embed a multi-page TIFF image into the document, the PdfGraphics instance draws the active frame only (the default active frame is the first frame). Use the Image.SelectActiveFrame method to select a frame to use. The compression retains for TIFF images with CCITT T.4 or CCITT T.6 compression.

You can use the following properties to reduce the image size and the size of the resulting PDF:

  • ConvertImagesToJpeg - Specifies whether to convert bitmap images into JPEG to reduce the size of the resulting PDF file.
  • JpegImageQuality - Gets or sets the quality of JPEG images in the resulting PDF file.

Tip

The PdfDocumentProcessor caches image data used as the DrawImage method parameter. If you need to draw the same image on multiple pages, you can reuse image data to improve the application performance and reduce the resulting file size.

To draw an image on the PDF page, use one of the following methods:

PdfGraphics.AddToPageForeground, PdfGraphics.AddToPageBackground
These methods allow you to draw content on an existing page.
PdfDocumentProcessor.RenderNewPage
Draws content on a new page.

The code sample below shows how to draw an image in the page center:

image at the center

using DevExpress.Pdf;
using System.Drawing;
using System.IO;

using (var processor = new PdfDocumentProcessor())
{
    processor.LoadDocument("Documents//Document.pdf");

    using (PdfGraphics graphics = processor.CreateGraphics())
    {
        // Obtain the first document page
        PdfPage page = processor.Document.Pages[0];

        using (FileStream fs = new FileStream("Documents//DevExpress.png", FileMode.Open))
        {
          // Calculate the image position
          RectangleF pageCenter = new RectangleF(106, 363, 400, 67);;

          // Draw an image into the calculated area
          graphics.DrawImage(image, pageCenter);

          // Add graphics content to the page foreground
          graphics.AddToPageForeground(page, 72, 72);
        }
    }
    processor.SaveDocument("result.pdf");
}
See Also