private boolean drawImage(
Image img, Image mask, AffineTransform xform, Color bgColor, ImageObserver obs) {
if (xform == null) xform = new AffineTransform();
else xform = new AffineTransform(xform);
xform.translate(0, img.getHeight(obs));
xform.scale(img.getWidth(obs), img.getHeight(obs));
AffineTransform inverse = this.normalizeMatrix();
AffineTransform flipper = AffineTransform.getScaleInstance(1, -1);
inverse.concatenate(xform);
inverse.concatenate(flipper);
double[] mx = new double[6];
inverse.getMatrix(mx);
if (currentFillGState != 255) {
PdfGState gs = fillGState[255];
if (gs == null) {
gs = new PdfGState();
gs.setFillOpacity(1);
fillGState[255] = gs;
}
cb.setGState(gs);
}
try {
com.lowagie.text.Image image = null;
if (!convertImagesToJPEG) {
image = com.lowagie.text.Image.getInstance(img, bgColor);
} else {
BufferedImage scaled =
new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g3 = scaled.createGraphics();
g3.drawImage(img, 0, 0, img.getWidth(null), img.getHeight(null), null);
g3.dispose();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(jpegQuality); // Set here your compression rate
ImageWriter iw = (ImageWriter) ImageIO.getImageWritersByFormatName("jpg").next();
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
iw.setOutput(ios);
iw.write(null, new IIOImage(scaled, null, null), iwparam);
iw.dispose();
ios.close();
scaled.flush();
scaled = null;
image = com.lowagie.text.Image.getInstance(baos.toByteArray());
}
if (mask != null) {
com.lowagie.text.Image msk = com.lowagie.text.Image.getInstance(mask, null, true);
msk.makeMask();
msk.setInverted(true);
image.setImageMask(msk);
}
cb.addImage(
image,
(float) mx[0],
(float) mx[1],
(float) mx[2],
(float) mx[3],
(float) mx[4],
(float) mx[5]);
Object url = getRenderingHint(HyperLinkKey.KEY_INSTANCE);
if (url != null && !url.equals(HyperLinkKey.VALUE_HYPERLINKKEY_OFF)) {
PdfAction action = new PdfAction(url.toString());
cb.setAction(
action, (float) mx[4], (float) mx[5], (float) (mx[0] + mx[4]), (float) (mx[3] + mx[5]));
}
} catch (Exception ex) {
throw new IllegalArgumentException();
}
if (currentFillGState != 255) {
PdfGState gs = fillGState[currentFillGState];
cb.setGState(gs);
}
return true;
}
/**
* Applying masks to images.
*
* @param args no arguments needed
*/
public static void main(String[] args) {
System.out.println("masked images");
Document document = new Document(PageSize.A4, 50, 50, 50, 50);
try {
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("maskedImages.pdf"));
document.open();
Paragraph p = new Paragraph("Some text behind a masked image.");
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
document.add(p);
PdfContentByte cb = writer.getDirectContent();
byte maskr[] = {
(byte) 0x3c,
(byte) 0x7e,
(byte) 0xe7,
(byte) 0xc3,
(byte) 0xc3,
(byte) 0xe7,
(byte) 0x7e,
(byte) 0x3c
};
Image mask = Image.getInstance(8, 8, 1, 1, maskr);
mask.makeMask();
mask.setInverted(true);
Image image = Image.getInstance("otsoe.jpg");
image.setImageMask(mask);
image.setAbsolutePosition(60, 550);
// explicit masking
cb.addImage(image);
// stencil masking
cb.setRGBColorFill(255, 0, 0);
cb.addImage(mask, mask.getScaledWidth() * 8, 0, 0, mask.getScaledHeight() * 8, 100, 450);
cb.setRGBColorFill(0, 255, 0);
cb.addImage(mask, mask.getScaledWidth() * 8, 0, 0, mask.getScaledHeight() * 8, 100, 400);
cb.setRGBColorFill(0, 0, 255);
cb.addImage(mask, mask.getScaledWidth() * 8, 0, 0, mask.getScaledHeight() * 8, 100, 350);
document.close();
} catch (Exception de) {
de.printStackTrace();
}
}
