Scale image to fit in Document Writer

[rauchj]

Hi everyone,

I'm trying insert a DICOM image to a PDF-Report with Document Writer (mirth 3.4.0). The Image has a resolution of 1024x786 pixels, the page size of the document writer is A4. The Image is cropped when the PDF is rendered by the Document Writer.

Is there a way to scale the image to fit the page automatically? Or do i need to scale the image before inserting in the PDF?

thanks in advance!

[siddharth]

That's a good question!

Following the lead on this thread,

https://stackoverflow.com/questions/3341485/how-to-make-a-html-page-in-a4-paper-size-pages

I used this HTML code in the template, and that does generate a document.

<table width="42.0cm" height="59.4cm">
<tr>${message.encodedData}</tr>
</table>

But the properties of the pdf shows A4 measurements instead of A2, rather multiple A4 sheets. So it looks like working but it does not. You could use a combination of CSS and HTML together to auto scale document based on the size, but I doubt that will work either.

I think you could use iText 2.1.7 API in a JS writer destination, which is what mirth internally uses to create PDFs through Document writer.

Something on these lines.

http://developers.itextpdf.com/examples/itext5-building-blocks/page-size

[rauchj]

So i did some research:

While a bitmap-image (like jpg) has a resolution, PDF does not. Only when a PDF is rendered eg for displaying on a screen or for printing, the resolution (DPI) matters.

Now: My image has a resolution of 1024x768 pixels. A normal DPI for displaying or printing is 96dpi, which means 1024px / 96dpi = 10.66 inch ~27cm would be the dimension of this image.

With a A4 Paper in Portrait (21cm width) and margins of 1cm, the usable space is 19cm => 19cm/27cm = 0.7 -> I need to scale the image to 70% that it fits the A4 page. Or choose a higher page size (like A2). Unfortunatly the setting "Page Size" in Document Writer for PDF does not affect the PDF, only when css style "@page" is used.

further reading: http://developers.itextpdf.com/conte...ion-images-pdf

if someone finds this useful, this is a javascript for document writer in Javascript writer destination:

// http://grepcode.com/snapshot/repo1.maven.org/maven2/com.lowagie/itext/2.1.7
importPackage(com.lowagie.text);
importPackage(com.lowagie.text.pdf);

var document = new Document(PageSize.A4, 10, 10, 10, 10);

PdfWriter.getInstance(document, new java.io.FileOutputStream(Packages.java.io.File("c://temp//document_writer.pdf")));
document.open();
//p = new Paragraph("Hi");

img1 = new Image.getInstance("c://temp//dicom//convert - Kopie//81708188_20170714125534_1.jpg");
img2 = new Image.getInstance("c://temp//dicom//convert - Kopie//81708188_20170714125534_2.jpg");
img3 = new Image.getInstance("c://temp//dicom//convert - Kopie//81708188_20170714125534_3.jpg");

//img1.scaleToFit(PageSize.A2.getWidth(), PageSize.A2.getHeight());
//img2.scaleToFit(PageSize.A2.getWidth(), PageSize.A2.getHeight());
//img3.scaleToFit(PageSize.A2.getWidth(), PageSize.A2.getHeight());

//document.add(p);
document.add(img1);
document.newPage();
document.add(img2);
document.newPage();
document.add(img3);
document.close();