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https://issues.apache.org/jira/browse/PDFBOX-4556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16867656#comment-16867656
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bal commented on PDFBOX-4556:
-----------------------------
hi, thanks for your support. I have tried with your code, using jpeg image it
throws the exception. i have tried with below code. I have also wrote the
appearance stream hard way as you mentioned but not got any visual
representation for that. opening pdf with the editor able to see the same.
PDXObjectImage imgxobj = null;
imagefile = new java.io.File(tickImage);
BufferedImage bufferedImage = null;
bufferedImage = ImageIO.read(imagefile);
if (bufferedImage.getColorModel().getNumComponents() == 3)
{
PDDeviceRGB rgb = PDDeviceRGB.INSTANCE;
imgxobj.setColorSpace(rgb);
}
if (bufferedImage.getColorModel().getNumComponents() == 1)
{
PDDeviceGray gray = new PDDeviceGray();
imgxobj.setColorSpace(gray);
}
float compression = 0.75f;
imgxobj = new PDJpeg(doc, bufferedImage, compression);
below is the stacktrace for the exception at above line
at org.apache.pdfbox.util.JPEGUtil.updateMetadata(IIOMetadata , Int32 )
at org.apache.pdfbox.util.ImageIOUtil.writeImage(BufferedImage image, String
formatName, OutputStream output, Int32 dpi, Single quality)
at
org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg.createImageStream(PDDocument
, BufferedImage , Single )
at org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg..ctor(PDDocument doc,
BufferedImage bi, Single compressionQuality)
> how the visual representation of the signature is achieved
> ------------------------------------------------------------
>
> Key: PDFBOX-4556
> URL: https://issues.apache.org/jira/browse/PDFBOX-4556
> Project: PDFBox
> Issue Type: Wish
> Components: .NET
> Affects Versions: 1.8.16
> Reporter: bal
> Priority: Major
> Attachments: image error stacktrace.txt, npe at adappearence
> dictionary.txt, pdfAnnotation.pdf, visibleSignature.pdf
>
>
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