PdfGraphics.DrawImage(Image, RectangleF) Method
Draws an image using the specified image bounds.
An Image object that specifies the image to draw.
A RectangleF structure that specifies the image bounds.
This method renders an image with its original resolution (DPI).
To add an image to the page, you need to call one of the PdfGraphics.AddToPageForeground, PdfGraphics.AddToPageBackground, and PdfDocumentProcessor.RenderNewPage overload methods. Note that these methods accept DPI values as arguments. The DPI values do not affect image quality and are used for coordinate transformation only (world coordinates to page coordinates).
If you embed multi-page TIFF images with CCITT T.4 or CCITT T.6 compression to the document, the PdfDocumentProcessor draws the first page only. Use the Image.SelectActiveFrame method to select a page that should be used.
The PdfGraphics will produce vector graphics for the EMF+ metafiles only. If a metafile contains more than GDI+ commands, it will be rasterized and rendered as a bitmap.