Do you save directly or incrementally?
If directly then the old one should be gone. If not, please share the
PDF (upload to sharehoster) and tell us why you think it's still there.
Tilman
On 26.04.2024 12:37, Jurgen Doll wrote:
Hi
I would like to know how to remove an image resource from a PDF form.
I use the following code to set an image object on a field:
private static void setAppearance( PDDocument pdfDoc, PDField
field, PDImageXObject image )
{
var widget = field.getWidgets().get(0);
var rect = widget.getRectangle();
var formObj = new PDFormXObject( new PDStream( pdfDoc ) );
formObj.setResources( new PDResources() );
formObj.setBBox( new PDRectangle
(
// The TransformationMatrix below enlarges the image
slightly,
// so adjust accordingly here otherwise the image is cropped.
rect.getLowerLeftX(), rect.getLowerLeftY() - 10,
rect.getWidth(), rect.getHeight() + 20
));
formObj.setFormType(1);
var appearanceStream = new PDAppearanceStream(
formObj.getCOSObject() );
var pageContentStream = new PDPageContentStream( pdfDoc,
appearanceStream );
pageContentStream.drawImage( image, getTransformationMatrix(
image, widget ) );
pageContentStream.close();
var appearance = new PDAppearanceDictionary();
appearance.setNormalAppearance( appearanceStream );
appearance.getCOSObject().setDirect( true );
widget.setAppearance( appearance );
}
To remove the image I do "widget.setAppearance( null )" or to replace
the image I use the above method to set the new image as the
appearance. However I've noticed that this doesn't remove the previous
image object/resource from the PDF. How do I go about removing it ?
Thanks, regards
Jurgen
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