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Posted to dev@pdfbox.apache.org by "Marian Ion (Jira)" <ji...@apache.org> on 2022/08/03 08:02:00 UTC
[jira] [Commented] (PDFBOX-5462) OutOfMemoryError when watermaking in 3.0.0-RC1
[ https://issues.apache.org/jira/browse/PDFBOX-5462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574578#comment-17574578 ]
Marian Ion commented on PDFBOX-5462:
------------------------------------
In this case, the best is to add that information to the javadoc of the [MemoryUsageSetting#setupMixed(long)|https://javadoc.io/static/org.apache.pdfbox/pdfbox/3.0.0-alpha3/org/apache/pdfbox/io/MemoryUsageSetting.html]method - or maybe better, to deprecate it stating the above arguments.
> OutOfMemoryError when watermaking in 3.0.0-RC1
> ----------------------------------------------
>
> Key: PDFBOX-5462
> URL: https://issues.apache.org/jira/browse/PDFBOX-5462
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 3.0.0 PDFBox
> Reporter: Marian Ion
> Assignee: Andreas Lehmkühler
> Priority: Major
> Attachments: TestPdfBox.tgz, my-pdf-test.jar
>
>
> I am using the Maven *3.0.0-RC1* version and I encounter the following error when watermarking a 5120 pages file:
> {quote} java.lang.OutOfMemoryError: Java heap space: failed reallocation of scalar replaced objects
> {quote}
>
> However, the *2.0.26* version code works without problem!
> The code is basically this :
> {code:java}
> private static final PDFont PDF_FONT = PDType1Font.HELVETICA;
> memoryUsageSetting = MemoryUsageSetting.setupMixed(2 * ONE_GIGA, 40 * ONE_GIGA);
> //try (PDDocument pdfDocument = PDDocument.load(is, memoryUsageSetting)) { // 2.0.26
> try (PDDocument pdfDocument = Loader.loadPDF(inputStream, memoryUsageSetting)) { // 3.0.0-RC1
> int nbPages = addWatermark(watermarkText, pdfDocument);
> pdfDocument.save(os);
> }
> ...
> private int addWatermark(String watermarkText, PDDocument document) throws IOException {
> int numberOfPages = document.getNumberOfPages();
> System.out.printf("Start adding watermark on a %d pages PDF document%n", numberOfPages);
> long start = System.nanoTime();
> int pageIndex = 0;
> for(PDPage page : document.getPages()) {
> ++pageIndex;
> try (PDPageContentStream cs = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true, true)) {
> float width = page.getMediaBox().getWidth();
> float height = page.getMediaBox().getHeight();
> int rotation = page.getRotation();
> switch(rotation) {
> case 90:
> width = page.getMediaBox().getHeight();
> height = page.getMediaBox().getWidth();
> cs.transform(Matrix.getRotateInstance(Math.toRadians(90), height, 0));
> break;
> case 180:
> cs.transform(Matrix.getRotateInstance(Math.toRadians(180), width, height));
> break;
> case 270:
> width = page.getMediaBox().getHeight();
> height = page.getMediaBox().getWidth();
> cs.transform(Matrix.getRotateInstance(Math.toRadians(270), 0, width));
> break;
> default:
> break;
> }
> double stringWidth = (double)PDF_FONT.getStringWidth(watermarkText) / 1000 * FONT_HEIGHT;
> double diagonalLength = Math.sqrt((double)width * width + (double)height * height);
> double angle = Math.atan2(height, width);
> cs.transform(Matrix.getRotateInstance(angle, 0, 0));
> cs.setFont(PDF_FONT, (float)FONT_HEIGHT);
> //cs.setRenderingMode(RenderingMode.STROKE); // for "hollow" effect
> PDExtendedGraphicsState gs = new PDExtendedGraphicsState();
> gs.setNonStrokingAlphaConstant(0.2f);
> gs.setStrokingAlphaConstant(0.2f);
> gs.setBlendMode(BlendMode.MULTIPLY);
> cs.setGraphicsStateParameters(gs);
> // some API weirdness here. When int, range is 0..255.
> // when float, this would be 0..1f
> cs.setNonStrokingColor(0f, 0, 0);
> cs.setStrokingColor(0f, 0, 0); // black
> float x = (float)((diagonalLength - stringWidth) / 2); // "horizontal" position in rotated world
> float y = (float)(-FONT_HEIGHT / 4); // 4 is a trial-and-error thing, this lowers the text a bit
> cs.beginText();
> cs.newLineAtOffset(x, y);
> cs.showText(watermarkText);
> cs.endText();
> } finally {
> ...
> }
> return numberOfPages;
> }
> {code}
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