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Add a checkbox to WatermarkController to convert the pdf to pdf-image (#1633)
* Add a checkbox to WatermarkController to convert the pdf to pdf-image * 381: Fix messages_en_GB --------- Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>
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mylk13
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@ -1,21 +1,14 @@
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package stirling.software.SPDF.controller.api.security;
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import java.awt.Color;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.List;
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import org.apache.pdfbox.Loader;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.pdmodel.PDPageContentStream;
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import org.apache.pdfbox.pdmodel.PDPageContentStream.AppendMode;
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import org.apache.pdfbox.pdmodel.common.PDRectangle;
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import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
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import org.apache.pdfbox.rendering.ImageType;
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import org.apache.pdfbox.rendering.PDFRenderer;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.http.ResponseEntity;
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@ -32,6 +25,7 @@ import io.swagger.v3.oas.annotations.tags.Tag;
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import stirling.software.SPDF.model.PDFText;
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import stirling.software.SPDF.model.api.security.RedactPdfRequest;
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import stirling.software.SPDF.pdf.TextFinder;
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import stirling.software.SPDF.utils.PdfUtils;
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import stirling.software.SPDF.utils.WebResponseUtils;
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@RestController
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@ -81,22 +75,9 @@ public class RedactController {
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}
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if (convertPDFToImage) {
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PDDocument imageDocument = new PDDocument();
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PDFRenderer pdfRenderer = new PDFRenderer(document);
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pdfRenderer.setSubsamplingAllowed(true);
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for (int page = 0; page < document.getNumberOfPages(); ++page) {
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BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
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PDPage newPage = new PDPage(new PDRectangle(bim.getWidth(), bim.getHeight()));
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imageDocument.addPage(newPage);
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PDImageXObject pdImage = LosslessFactory.createFromImage(imageDocument, bim);
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PDPageContentStream contentStream =
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new PDPageContentStream(
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imageDocument, newPage, AppendMode.APPEND, true, true);
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contentStream.drawImage(pdImage, 0, 0);
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contentStream.close();
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}
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PDDocument convertedPdf = PdfUtils.convertPdfToPdfImage(document);
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document.close();
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document = imageDocument;
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document = convertedPdf;
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}
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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@ -36,6 +36,7 @@ import io.swagger.v3.oas.annotations.Operation;
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import io.swagger.v3.oas.annotations.tags.Tag;
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import stirling.software.SPDF.model.api.security.AddWatermarkRequest;
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import stirling.software.SPDF.utils.PdfUtils;
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import stirling.software.SPDF.utils.WebResponseUtils;
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@RestController
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@ -60,6 +61,7 @@ public class WatermarkController {
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float opacity = request.getOpacity();
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int widthSpacer = request.getWidthSpacer();
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int heightSpacer = request.getHeightSpacer();
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boolean convertPdfToImage = request.isConvertPDFToImage();
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// Load the input PDF
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PDDocument document = Loader.loadPDF(pdfFile.getBytes());
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@ -104,6 +106,12 @@ public class WatermarkController {
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contentStream.close();
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}
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if (convertPdfToImage) {
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PDDocument convertedPdf = PdfUtils.convertPdfToPdfImage(document);
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document.close();
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document = convertedPdf;
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}
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return WebResponseUtils.pdfDocToWebResponse(
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document,
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Filenames.toSimpleFileName(pdfFile.getOriginalFilename())
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@ -44,4 +44,7 @@ public class AddWatermarkRequest extends PDFFile {
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@Schema(description = "The height spacer between watermark elements", example = "50")
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private int heightSpacer;
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@Schema(description = "Convert the redacted PDF to an image", defaultValue = "false")
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private boolean convertPDFToImage;
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}
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@ -341,6 +341,30 @@ public class PdfUtils {
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}
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}
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/**
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* Converts a given Pdf file to PDF-Image.
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*
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* @param document to be converted. Note: the caller is responsible for closing the document
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* @return converted document to PDF-Image
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* @throws IOException if conversion fails
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*/
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public static PDDocument convertPdfToPdfImage(PDDocument document) throws IOException {
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PDDocument imageDocument = new PDDocument();
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PDFRenderer pdfRenderer = new PDFRenderer(document);
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pdfRenderer.setSubsamplingAllowed(true);
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for (int page = 0; page < document.getNumberOfPages(); ++page) {
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BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
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PDPage newPage = new PDPage(new PDRectangle(bim.getWidth(), bim.getHeight()));
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imageDocument.addPage(newPage);
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PDImageXObject pdImage = LosslessFactory.createFromImage(imageDocument, bim);
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PDPageContentStream contentStream =
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new PDPageContentStream(imageDocument, newPage, AppendMode.APPEND, true, true);
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contentStream.drawImage(pdImage, 0, 0);
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contentStream.close();
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}
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return imageDocument;
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}
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private static BufferedImage prepareImageForPdfToImage(
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int maxWidth, int height, String imageType) {
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BufferedImage combined;
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@ -945,6 +945,7 @@ watermark.selectText.6=heightSpacer (Space between each watermark vertically):
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watermark.selectText.7=Opacity (0% - 100%):
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watermark.selectText.8=Watermark Type:
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watermark.selectText.9=Watermark Image:
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watermark.selectText.10=Convert PDF to PDF-Image
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watermark.submit=Add Watermark
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watermark.type.1=Text
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watermark.type.2=Image
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@ -945,6 +945,7 @@ watermark.selectText.6=heightSpacer (Space between each watermark vertically):
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watermark.selectText.7=Opacity (0% - 100%):
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watermark.selectText.8=Watermark Type:
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watermark.selectText.9=Watermark Image:
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watermark.selectText.10=Convert PDF to PDF-Image
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watermark.submit=Add Watermark
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watermark.type.1=Text
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watermark.type.2=Image
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@ -104,6 +104,10 @@
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<label for="heightSpacer" th:text="#{watermark.selectText.6}"></label>
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<input type="text" id="heightSpacer" name="heightSpacer" class="form-control" value="50">
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</div>
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<div class="mb-3 form-check">
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<input type="checkbox" id="convertPDFToImage" name="convertPDFToImage">
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<label for="convertPDFToImage" th:text="#{watermark.selectText.10}"></label>
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</div>
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<div class="mb-3 text-center">
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<input type="submit" id="submitBtn" th:value="#{watermark.submit}" class="btn btn-primary">
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</div>
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