Sterling Rouse <sterling <at> 360works.com> writes:
>
> I need to be able to define my own spot color and apply it to the QR code.
This is to be read by a printing press,
> which will apply the spot color in place of the black that is actually
displayed if you open the PDF in Acrobat.
>
> On Aug 1, 2012, at 12:41 PM, John Renfrew <rwu <at> btclick.com> wrote:
>
> > You can convert it to a Java awt image using
> > qrcode.createAwtImage(java.awt.Color.GREEN, java.awt.Color.White) for
> > example to give green on white
> >
> >
> > john renfrew
> > Right Way Up
> >
> > -----Original Message-----
> > From: Sterling Rouse [mailto:sterling <at> 360works.com]
> > Sent: 01 August 2012 16:53
> > To: itext-questions <at> lists.sourceforge.net
> > Subject: [iText-questions] QR Code
> >
> > Is there a way to apply a spot color to a QR code generated in iText?
> >
> >
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> > iText(R) is a registered trademark of 1T3XT BVBA.
> > Many questions posted to this list can (and will) be answered with a
> > reference to the iText book: http://www.itextpdf.com/book/
> > Please check the keywords list before you ask for examples:
> > http://itextpdf.com/themes/keywords.php
> >
> >
> >
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> > threat landscape has changed and how IT managers can respond. Discussions
> > will include endpoint security, mobile security and the latest in malware
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> > iText(R) is a registered trademark of 1T3XT BVBA.
> > Many questions posted to this list can (and will) be answered with a
reference to the iText book: http://www.itextpdf.com/book/
> > Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> iText-questions mailing list
> iText-questions <at> lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/itext-questions
>
> iText(R) is a registered trademark of 1T3XT BVBA.
> Many questions posted to this list can (and will) be answered with a
> reference
to the iText book: http://www.itextpdf.com/book/
> Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
>
>
Hi Sterling, don't know if you ever got a solution. I couldn't find any way to
get a bitmap image into a spot colour space. I have a workaround that's a bit
messy but does the job. Basically, I make a white inverted image of the QR code
and float it over a solid fill of spot colour. Example code below.
cheers, Mike
// get the QR code image
BarcodeQRCode qrcode = new BarcodeQRCode(rawtext, 0, 0, null);
Image qrImage = qrcode.getImage();
float pSize = (float)MM_TO_POINTS*size;
qrImage.scaleToFit(pSize, pSize);
qrImage.setAbsolutePosition(0, 0);
// set up the PDF page
Document doc = new Document();
FileOutputStream fos = new FileOutputStream(file);
PdfWriter writer = PdfWriter.getInstance(doc, fos);
doc.setPageSize(new com.itextpdf.text.Rectangle(pSize, pSize));
doc.open();
// fill page with required spot colour
PdfSpotColor spot = new PdfSpotColor("spot blue", new CMYKColor(1.0f,
1.0f, 0f, 0f));
PdfContentByte canvas = writer.getDirectContent();
canvas.setColorFill(spot, 1.0f);
canvas.newPath();
canvas.moveTo(0.0f, 0.0f);
canvas.lineTo(pSize, 0.0f);
canvas.lineTo(pSize, pSize);
canvas.lineTo(0.0f, pSize);
canvas.closePath();
canvas.fill();
// float white inverse image of qr code over the top
qrImage.setInverted(true);
qrImage.makeMask();
byte[] data = {(byte)255};
Image fil = Image.getInstance(1, 1, 1, 8, data); // 1 pixel white img
fil.scaleAbsolute(pSize, pSize);
fil.setImageMask(qrImage);
fil.setAbsolutePosition(0.0f, 0.0f);
canvas.addImage(fil);
doc.close();
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
