PdfGraphics.DrawImage(DXImage, PointF) Method

Draws the specified image in its original size at the specified page point.

Assembly : DevExpress.Pdf.v25.2.Drawing.dll

NuGet Package : DevExpress.Pdf.Drawing

Declaration

C#
VB.NET

csharp

public void DrawImage(
    DXImage image,
    PointF location
)

Public Sub DrawImage(
    image As DXImage,
    location As PointF
)

Parameters

Name	Type	Description
image	DXImage

An image to draw.

| | location | PointF |

A point in world coordinate system where you can position 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
SVG

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.

You can also call the PdfDocumentProcessor.OptimizeDocument method to optimize PDF document images. The method parameter specifies image compression settings.

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.AddToPageBackgroundThese methods allow you to draw content on an existing page.PdfDocumentProcessor.RenderNewPageDraws content on a new page.

Example: Draw an Image in the Page Center

The following code snippet draws an image in specified point:

C#
VB.NET

csharp

using DevExpress.Pdf;
using DevExpress.Drawing;

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

        // Obtain the first document page
        PdfPage page = processor.Document.Pages[0];

        // Specify an image to draw
        using (var stream = new FileStream("Documents//DevExpress.png", FileMode.Open, FileAccess.Read)) {
          using (DXImage image = DXImage.FromStream(stream)) {

          // Calculate the image position
          var point = new PointF((float)rect.Center.X-200, (float)rect.Center.Y);

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

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

vbnet
Imports DevExpress.Pdf
Imports DevExpress.Drawing
Imports System.IO
Imports System.Drawing

Using processor As New PdfDocumentProcessor()
    processor.LoadDocument("Documents//Document.pdf")
  Using graphics As PdfGraphics = processor.CreateGraphicsWorldSystem()

      ' Obtain the first document page
      Dim page As PdfPage = processor.Document.Pages(0)

      ' Specify an image to draw
      Using stream As New FileStream("Documents//DevExpress.png", FileMode.Open, FileAccess.Read)
        Using image As DXImage = DXImage.FromStream(stream)

            ' Calculate the image position
            Dim point As New PointF(CSng(rect.Center.X) - 200, CSng(rect.Center.Y))

            ' Draw an image into the calculated point
            graphics.DrawImage(image, point)

            ' Add graphics content to the page foreground
            graphics.AddToPageForeground(page)
        End Using
      End Using
  End Using
  processor.SaveDocument("result.pdf")
End Using