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Add a checkbox to WatermarkController to convert the pdf to pdf-image (#1633)

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* Add a checkbox to WatermarkController to convert the pdf to pdf-image

* 381: Fix messages_en_GB

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Co-authored-by: Anthony Stirling <[email protected]>
This commit is contained in:
mylk13
2024-08-06 08:11:52 +00:00
committed by GitHub
co-authored by Anthony Stirling
parent ce70796fff
commit ec537c6fde
7 changed files with 44 additions and 22 deletions
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src/main/java/stirling/software/SPDF/utils/PdfUtils.java
+24
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@@ -341,6 +341,30 @@ public class PdfUtils {
}
}
/**
* Converts a given Pdf file to PDF-Image.
*
* @param document to be converted. Note: the caller is responsible for closing the document
* @return converted document to PDF-Image
* @throws IOException if conversion fails
*/
public static PDDocument convertPdfToPdfImage(PDDocument document) throws IOException {
PDDocument imageDocument = new PDDocument();
PDFRenderer pdfRenderer = new PDFRenderer(document);
pdfRenderer.setSubsamplingAllowed(true);
for (int page = 0; page < document.getNumberOfPages(); ++page) {
BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
PDPage newPage = new PDPage(new PDRectangle(bim.getWidth(), bim.getHeight()));
imageDocument.addPage(newPage);
PDImageXObject pdImage = LosslessFactory.createFromImage(imageDocument, bim);
PDPageContentStream contentStream =
new PDPageContentStream(imageDocument, newPage, AppendMode.APPEND, true, true);
contentStream.drawImage(pdImage, 0, 0);
contentStream.close();
}
return imageDocument;
}
private static BufferedImage prepareImageForPdfToImage(
int maxWidth, int height, String imageType) {
BufferedImage combined;