Java 类com.itextpdf.text.pdf.PdfRectangle 实例源码

public void execute(CropParameters parameters) throws TaskException {
    PdfSource<?> source = parameters.getSource();
    LOG.debug("Opening {} ", source);
    reader = source.open(sourceOpener);
    int totalPages = reader.getNumberOfPages();

    File tmpFile = createTemporaryPdfBuffer();
    LOG.debug("Created output temporary buffer {} ", tmpFile);

    copier = new DefaultPdfCopier(reader, tmpFile, parameters.getVersion());
    copier.setCompression(parameters.isCompress());
    copier.open();

    Set<PdfRectangle> cropAreas = getPdfRectangles(parameters.getCropAreas());
    for (int page = 1; page <= totalPages; page++) {
        for (PdfRectangle cropBox : cropAreas) {
            LOG.trace("Adding page {} with crop box {}", page, cropBox);
            copier.addPage(reader, page, cropBox);
        }
        notifyEvent(getNotifiableTaskMetadata()).stepsCompleted(page).outOf(totalPages);
    }
    copier.freeReader(reader);
    nullSafeCloseQuietly(copier);
    nullSafeClosePdfReader(reader);

    outputWriter.setOutput(file(tmpFile).name(parameters.getOutputName()));
    parameters.getOutput().accept(outputWriter);
    LOG.debug("Crop areas applied to {}", parameters.getOutput());
}

private Set<PdfRectangle> getPdfRectangles(Set<RectangularBox> areas) {
    Set<PdfRectangle> retVal = new LinkedHashSet<PdfRectangle>();
    for (RectangularBox box : areas) {
        retVal.add(new PdfRectangle(box.getLeft(), box.getBottom(), box.getRight(), box.getTop()));
    }
    return retVal;
}

public void addPage(PdfReader reader, int pageNumber, PdfRectangle cropBox) throws TaskException {
    PdfImportedPage page = pdfCopy.getImportedPage(reader, pageNumber);
    PdfDictionary dictionary = reader.getPageN(pageNumber);
    dictionary.put(PdfName.MEDIABOX, cropBox);
    dictionary.put(PdfName.CROPBOX, cropBox);
    addPage(page);
}

@Override
protected void configurePDFWriter(PdfWriter writer) throws IOException {

    final boolean initialPrecisionFlat = ByteBuffer.HIGH_PRECISION;
    try {
        ByteBuffer.HIGH_PRECISION = true;

        PdfDictionary dicMeasure = new PdfDictionary(new PdfName("Measure"));
        dicMeasure.put(PdfName.SUBTYPE, new PdfName("GEO"));

        PdfArray bounds = new PdfArray();
        // lower left, upper left, upper right, lower right
        bounds.add(new float[]{0f, 0f, 0f, 1f, 1f, 1f, 1f, 0f});

        // geographic coordinates of corner points as lat/lon pairs
        PdfArray gpts = new PdfArray(lonLatCornerPoints);
        // lower left, upper left, upper right, lower right
        PdfArray lpts = new PdfArray(new float[]{0f, 0f, 0f, 1f, 1f, 1f, 1f, 0f});

        dicMeasure.put(new PdfName("Bounds"), bounds);
        dicMeasure.put(new PdfName("LPTS"), lpts);
        dicMeasure.put(new PdfName("GPTS"), gpts);

        PdfDictionary dicGCS = new PdfDictionary(new PdfName("PROJCS"));
        dicGCS.put(new PdfName("WKT"), new PdfString(wkt));

        PdfIndirectObject indObjGCS = writer.addToBody(dicGCS);
        PdfIndirectReference indRefGCS = indObjGCS.getIndirectReference();
        dicMeasure.put(new PdfName("GCS"), indRefGCS);

        PdfDictionary viewport = new PdfDictionary(new PdfName("Viewport"));

        viewport.put(new PdfName("Name"), new PdfString("Scree"));

        float left = (float) xToPagePx(pageFormat.getPageLeft());
        float lower = (float) yToPagePx(pageFormat.getPageBottom());
        float right = (float) xToPagePx(pageFormat.getPageRight());
        float upper = (float) yToPagePx(pageFormat.getPageTop());
        viewport.put(new PdfName("BBox"), new PdfRectangle(left, lower, right, upper));

        PdfIndirectObject indObjMeasure = writer.addToBody(dicMeasure);
        PdfIndirectReference indRefMeasure = indObjMeasure.getIndirectReference();
        viewport.put(new PdfName("Measure"), indRefMeasure);

        writer.setPageViewport(new PdfArray(viewport));

    } finally {
        ByteBuffer.HIGH_PRECISION = initialPrecisionFlat;
    }
}