Example usage for com.lowagie.text.pdf PdfTransparencyGroup put

Introduction

In this page you can find the example usage for com.lowagie.text.pdf PdfTransparencyGroup put.

Prototype

public void put(PdfName key, PdfObject object) 

Source Link

Document

Associates the specified PdfObject as value with the specified PdfName as key in this map.

Usage

From source file:org.alchemy.core.AlcSession.java

License:Open Source License

/** Save the canvas to a single paged PDF file
 * //from  w w w . j a  va2s.  com
 * @param file  The file object to save the pdf to
 * @return      True if save worked, otherwise false
 */
boolean saveSinglePdf(File file) {
    // Get the current 'real' size of the canvas without margins/borders
    java.awt.Rectangle bounds = Alchemy.canvas.getVisibleRect();
    //int singlePdfWidth = Alchemy.window.getWindowSize().width;
    //int singlePdfHeight = Alchemy.window.getWindowSize().height;
    com.lowagie.text.Document document = new com.lowagie.text.Document(
            new com.lowagie.text.Rectangle(bounds.width, bounds.height), 0, 0, 0, 0);
    System.out.println("Save Single Pdf Called: " + file.toString());
    boolean noError = true;

    try {

        PdfWriter singleWriter = PdfWriter.getInstance(document, new FileOutputStream(file));
        document.addTitle("Alchemy Session");
        document.addAuthor(USER_NAME);
        document.addCreator("Alchemy <http://al.chemy.org>");

        // Add metadata and open the document
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        XmpWriter xmp = new XmpWriter(os);
        PdfSchema pdf = new PdfSchema();
        pdf.setProperty(PdfSchema.KEYWORDS, "Alchemy <http://al.chemy.org>");
        //pdf.setProperty(PdfSchema.VERSION, "1.4");
        xmp.addRdfDescription(pdf);
        xmp.close();
        singleWriter.setXmpMetadata(os.toByteArray());

        // To avoid transparent colurs being converted from RGB>CMYK>RGB
        // We have to add everything to a transparency group
        PdfTransparencyGroup transGroup = new PdfTransparencyGroup();
        transGroup.put(PdfName.CS, PdfName.DEVICERGB);

        document.open();

        PdfContentByte cb = singleWriter.getDirectContent();
        PdfTemplate tp = cb.createTemplate(bounds.width, bounds.height);

        document.newPage();

        cb.getPdfWriter().setGroup(transGroup);
        // Make sure the color space is Device RGB
        cb.setDefaultColorspace(PdfName.CS, PdfName.DEVICERGB);

        // Draw into the template and add it to the PDF 
        Graphics2D g2pdf = tp.createGraphics(bounds.width, bounds.height);
        Alchemy.canvas.setGuide(false);
        Alchemy.canvas.vectorCanvas.paintComponent(g2pdf);
        Alchemy.canvas.setGuide(true);
        g2pdf.dispose();
        cb.addTemplate(tp, 0, 0);

    } catch (DocumentException ex) {
        System.err.println(ex);
        noError = false;
    } catch (IOException ex) {
        System.err.println(ex);
        noError = false;
    }

    document.close();

    return noError;
}

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From source file:questions.images.TransparentEllipse2.java

public static void main(String[] args) {

    Document document = new Document(PageSize.POSTCARD);
    try {//from  w  w w .j av  a  2  s .c  o m
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
        document.open();
        PdfContentByte cb = writer.getDirectContent();

        // clipped image
        cb.ellipse(1, 1, PageSize.POSTCARD.getWidth() - 2, PageSize.POSTCARD.getHeight() - 2);
        cb.clip();
        cb.newPath();
        Image img = Image.getInstance(RESOURCE);
        img.scaleToFit(PageSize.POSTCARD.getWidth(), PageSize.POSTCARD.getHeight());
        cb.addImage(img, PageSize.POSTCARD.getWidth(), 0, 0, PageSize.POSTCARD.getHeight(), 0, 0);

        //Prepare gradation list
        int gradationStep = 40;
        float[] gradationRatioList = new float[gradationStep];
        for (int i = 0; i < gradationStep; i++) {
            gradationRatioList[i] = 1 - (float) Math.sin(Math.toRadians(90.0f / gradationStep * (i + 1)));
        }

        //Create template
        PdfTemplate template = cb.createTemplate(PageSize.POSTCARD.getWidth(), PageSize.POSTCARD.getHeight());

        //Prepare transparent group
        PdfTransparencyGroup transGroup = new PdfTransparencyGroup();
        transGroup.put(PdfName.CS, PdfName.DEVICEGRAY);
        transGroup.setIsolated(true);
        transGroup.setKnockout(false);
        template.setGroup(transGroup);

        //Prepare graphic state
        PdfGState gState = new PdfGState();
        PdfDictionary maskDict = new PdfDictionary();
        maskDict.put(PdfName.TYPE, PdfName.MASK);
        maskDict.put(PdfName.S, new PdfName("Luminosity"));
        maskDict.put(new PdfName("G"), template.getIndirectReference());
        gState.put(PdfName.SMASK, maskDict);
        cb.setGState(gState);

        //Create gradation for mask
        for (int i = 1; i < gradationStep + 1; i++) {
            template.setLineWidth(gradationStep + 1 - i);
            template.setGrayStroke(gradationRatioList[gradationStep - i]);
            template.ellipse(0, 0, PageSize.POSTCARD.getWidth(), PageSize.POSTCARD.getHeight());
            template.stroke();
        }

        //Place template
        cb.addTemplate(template, 0, 0);
    } catch (DocumentException de) {
        System.err.println(de.getMessage());
    } catch (IOException ioe) {
        System.err.println(ioe.getMessage());
    }

    document.close();
}

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