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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2017/12/15 16:03:00 UTC
[jira] [Commented] (PDFBOX-4037) Appending an image to an already
existing PDF does not preserve image size
[ https://issues.apache.org/jira/browse/PDFBOX-4037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16292722#comment-16292722 ]
Tilman Hausherr commented on PDFBOX-4037:
-----------------------------------------
Your code is fine. But the comparison doesn't really mean much, how do we know that each viewer renders at exactly 100%, and that your screen is at 100% ?
> Appending an image to an already existing PDF does not preserve image size
> --------------------------------------------------------------------------
>
> Key: PDFBOX-4037
> URL: https://issues.apache.org/jira/browse/PDFBOX-4037
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.8
> Reporter: Kevin Tabary
> Attachments: after_rendering.PNG, signature.png
>
>
> Given an already existing document on which I want to append a small image at position (0;0) on the first page, when saving the PDF, the image appears somehow bigger than its original size.
> Please find below the code I am using:
> {code}
> public void mergePdfWithImages(MultipartFile pdf, MultipartFile image) throws Exception {
> PDDocument pdfDocument = PDDocument.load(pdf.getInputStream());
> PDPage pdfPage = pdfDocument.getPage(0);
> PDImageXObject pdfImage = PDImageXObject.createFromByteArray(pdfDocument, image.getBytes(), null);
> PDPageContentStream pageContentStream = new PDPageContentStream(pdfDocument, pdfPage, PDPageContentStream.AppendMode.APPEND, true, true);
> pageContentStream.drawImage(pdfImage, 0, 0);
> pageContentStream.close();
> pdfDocument.save("C:\\Data\\result.pdf");
> pdfDocument.close();
> }
> {code}
> I tried to set the flag compress / resetContext to any combination of true/false without any success. Please find the image (signature.png) I am using as well as the comparison after the PDF is rendered (afrer_rendering.png): the image appended on it is clearly bigger than its original size, is there any way to preserve original size ?
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