Java Tutorial/PDF/Transparency
PdfTransparencyGroup
<source lang="java">
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.pdf.CMYKColor; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfGState; import com.lowagie.text.pdf.PdfTemplate; import com.lowagie.text.pdf.PdfTransparencyGroup; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception { Document document = new Document(); PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf")); document.open(); PdfContentByte cb = writer.getDirectContent(); float gap = (document.getPageSize().width() - 400) / 3; PdfTemplate tp; PdfTransparencyGroup group; tp = cb.createTemplate(200, 200); pictureCircles(0, 0, tp); group = new PdfTransparencyGroup(); group.setIsolated(true); group.setKnockout(false); tp.setGroup(group); cb.addTemplate(tp, 200 + 2 * gap, 500); document.close(); } public static void pictureCircles(float x, float y, PdfContentByte cb) { PdfGState gs = new PdfGState(); gs.setBlendMode(PdfGState.BM_MULTIPLY); gs.setFillOpacity(1f); cb.setGState(gs); cb.setColorFill(new CMYKColor(0f, 0f, 0f, 0.15f)); cb.circle(x + 125, y + 75, 70); cb.fill(); cb.circle(x + 125, y + 125, 70); cb.fill(); }
}</source>