Output Image Size

DynamicPDF Rasterizer for .NET provides both a static ImageSize class for easily creating images from PDFs and several classes that extend ImageSize that supports creating images with custom sizing.

Static ImageSize

DynamicPDF Rasterizer for .NET provides an ImageSize class which specifies the height, width, horizontal resolution and vertical resolution of a generated image. DynamicPDF Rasterizer defines the following static ImageSize classes for quick use in your applications.

ceTe.DynamicPDF.Rasterizer.ImageSize.Dpi150

• Horizontal DPI (Dots Per Inch): 150
• Vertical DPI: 150

ceTe.DynamicPDF.Rasterizer.ImageSize.Dpi300

• Horizontal DPI: 300
• Vertical DPI: 300

ceTe.DynamicPDF.Rasterizer.ImageSize.Dpi600

• Horizontal DPI: 600
• Vertical DPI: 600

ceTe.DynamicPDF.Rasterizer.ImageSize.Dpi72

• Horizontal DPI: 72
• Vertical DPI: 72

ceTe.DynamicPDF.Rasterizer.ImageSize.Dpi96

• Horizontal DPI: 96
• Vertical DPI: 96

ceTe.DynamicPDF.Rasterizer.ImageSize.FaxStandard

• Horizontal DPI: 204
• Vertical DPI: 98

ceTe.DynamicPDF.Rasterizer.ImageSize.FaxFine

• Horizontal DPI: 204
• Vertical DPI: 196

ceTe.DynamicPDF.Rasterizer.ImageSize.FaxSuperfine

• Horizontal DPI: 200
• Vertical DPI: 400

The following example illustrates rasterizing a PDF document into a JPEG image using a static ImageSize.

PdfRasterizer rasterizer = new PdfRasterizer(pdfFilePath);
rasterizer.Draw(pngFilePath, ImageFormat.Jpeg, ImageSize.Dpi150);       

Dim MyRasterizer As PdfRasterizer = New PdfRasterizer(pdfFilePath)
MyRasterizer.Draw(pngFilePath, ImageFormat.Jpeg, ImageSize.Dpi150) 

ImageSize Using Draw Method

Rather than using a static image size, you can use one of the classes that inherit from the ImageSize class.

• ceTe.DynamicPDF.Rasterizer.DpiImageSize - Allows defining any horizontal and vertical DPI (Dots Per Inch) for an outputted image.
• ceTe.DynamicPDF.Rasterizer.FixedImageSize - Allows defining any height and width for an outputted image.
• ceTe.DynamicPDF.Rasterizer.MaxImageSize - Allows defining any height and width for an outputted image but MaxImageSize only outputs the final image as large as you have defined while still maintaining the original document proportions.
• ceTe.DynamicPDF.Rasterizer.PercentageImageSize - Allows any horizontal or vertical percentage (of the original document) to be defined for the output image.

Pass one of the listed subclasses into the PdfRasterizer class's Draw method to create the custom-sized image. The following example illustrates rasterizing a PDF document into a JPEG that is 200 points in height and 200 points in width.

PdfRasterizer rasterizer = new PdfRasterizer(pdfFilePath);
FixedImageSize jpegSize = new FixedImageSize(200, 200);
rasterizer.Draw(pngFilePath, ImageFormat.Jpeg, jpegSize);       

Dim MyRasterizer As PdfRasterizer = New PdfRasterizer(pdfFilePath)
Dim MyJpegSize As FixedImageSize = New FixedImageSize(200, 200)
MyRasterizer.Draw(pngFilePath, ImageFormat.Jpeg, MyJpegSize)