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Calibration large image during conversion image to PDF using Aspose.Pdf


I try to find the way to calibration image during conversion JPG to PDF using Aspose.pdf for .NET


var doc = new Aspose.Pdf.Document();
Page page = doc.Pages.Add();
Stream imageStream;
using (imageStream){
       Aspose.Pdf.Image image = new Aspose.Pdf.Image();
       operationName = "Setting image stream";
       image.ImageStream = imageStream;

       operationName = "Set page properties";
       page.PageInfo.Width = PageSize.A4.Width;
       page.PageInfo.Height = PageSize.A4.Height;


Please, could you provide some examples to calibration image in a way to looks nice if:
Image width is greatter than page size but height is smaller then page size ( now image expand height to fill page)
And another scenario when image height is bigger than page but width is smaller.


Thanks for contacting support.

You may calibrate image during JPG to PDF conversion through different ways. For instance, you may either adjust height/width of the page equal to height/width of the image, or adjust height/width of the image according to desired page height/width.

Please check following sample code snippet(s), where I have generated PDF from JPG through both ways, mentioned above.

Adjust Page Height/Width

var pdf = new Aspose.Pdf.Document();
var pdfImageSection = pdf.Pages.Add();
FileStream stream = new FileStream("inFile.jpg", FileMode.Open);
var image = new Aspose.Pdf.Image { ImageStream = stream };
var bmp = new System.Drawing.Bitmap(stream);
pdfImageSection.PageInfo.Width = bmp.Width;
pdfImageSection.PageInfo.Height = bmp.Height;
// remove extra white space in four corners by setting page margin information
pdfImageSection.PageInfo.Margin.Left = pdfImageSection.PageInfo.Margin.Right = pdfImageSection.PageInfo.Margin.Top = pdfImageSection.PageInfo.Margin.Bottom = 0f;
pdf.Save(dataDir + "outFile.pdf");

Scale Input Image

var pdf = new Aspose.Pdf.Document();
var pdfImageSection = pdf.Pages.Add();
FileStream stream = new FileStream("inFile.jpg", FileMode.Open);
System.Drawing.Image img = new Bitmap(stream);
img = ScaleImage(img, (int)pdfImageSection.PageInfo.Width, (int)pdfImageSection.PageInfo.Height);
MemoryStream ms = new MemoryStream();
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
ms.Seek(0, SeekOrigin.Begin);
var image = new Aspose.Pdf.Image { ImageStream = ms };
pdfImageSection.PageInfo.Margin.Left = pdfImageSection.PageInfo.Margin.Right = pdfImageSection.PageInfo.Margin.Top = pdfImageSection.PageInfo.Margin.Bottom = 0;
pdf.Save(dataDir + "outFile.pdf");

Definition of ScaleImage(…) method

public static System.Drawing.Image ScaleImage(System.Drawing.Image image, int maxWidth, int maxHeight)
 var ratioX = (double)maxWidth / image.Width;
 var ratioY = (double)maxHeight / image.Height;
 var ratio = Math.Min(ratioX, ratioY);
 var newWidth = (int)(image.Width * ratio);
 var newHeight = (int)(image.Height * ratio);
 var newImage = new Bitmap(newWidth, newHeight);
 using (var graphics = Graphics.FromImage(newImage))
    graphics.DrawImage(image, 0, 0, newWidth, newHeight);
 return newImage;

In case of any further assistance, please feel free to let us know.

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