PdfGraphics.DrawImage(DXImage, RectangleF) Method

Draws an image in the specified page rectangle. The image is scaled to fit this rectangle.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v23.2.Drawing.dll

NuGet Package: DevExpress.Pdf.Drawing

Declaration

C#

public void DrawImage(
    DXImage image,
    RectangleF bounds
)

VB.NET

Public Sub DrawImage(
    image As DXImage,
    bounds As RectangleF
)

Parameters

Name	Type	Description
image	DXImage	An image to draw.
bounds	RectangleF	A page area in world coordinate system where you want to 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
• SVG

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:

C#

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

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];
        PdfRectangle rect = page.CropBox;

        // 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
          RectangleF pageCenter =
            new RectangleF((float)rect.Width / 2 - image.Width / 2, (float)rect.Height / 2 - image.Height / 2, image.Width, image.Height);

          // 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");
}

VB.NET

Imports DevExpress.Pdf
Imports System.Drawing
Imports DevExpress.Drawing

Using processor = New PdfDocumentProcessor()
  processor.LoadDocument("Documents//Document.pdf")

  Using graphics As PdfGraphics = processor.CreateGraphics()
    ' Obtain the first document page
    Dim page As PdfPage = processor.Document.Pages(0)
    Dim rect As PdfRectangle = page.CropBox

    ' Specify an image to draw
    Using stream = New FileStream("Documents//DevExpress.png", FileMode.Open, FileAccess.Read)
      Using image As DXImage = DXImage.FromStream(stream)
      ' Calculate the image position
      Dim pageCenter As New RectangleF(CSng(rect.Width) / 2 - image.Width \ 2, CSng(rect.Height) / 2 - image.Height \ 2, image.Width, image.Height)

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

      ' Add graphics content to the page foreground
      graphics.AddToPageForeground(page, 72, 72)
      End Using
    End Using
  End Using
  processor.SaveDocument("result.pdf")
End Using