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;
}
Image getImage() throws IOException {
readPng();
try {
int pal0 = 0;
int palIdx = 0;
palShades = false;
if (trans != null) {
for (int k = 0; k < trans.length; ++k) {
int n = trans[k] & 0xff;
if (n == 0) {
++pal0;
palIdx = k;
}
if (n != 0 && n != 255) {
palShades = true;
break;
}
}
}
if ((colorType & 4) != 0) palShades = true;
genBWMask = (!palShades && (pal0 > 1 || transRedGray >= 0));
if (!palShades && !genBWMask && pal0 == 1) {
additional.put(PdfName.MASK, new PdfLiteral("[" + palIdx + " " + palIdx + "]"));
}
boolean needDecode =
(interlaceMethod == 1)
|| (bitDepth == 16)
|| ((colorType & 4) != 0)
|| palShades
|| genBWMask;
switch (colorType) {
case 0:
inputBands = 1;
break;
case 2:
inputBands = 3;
break;
case 3:
inputBands = 1;
break;
case 4:
inputBands = 2;
break;
case 6:
inputBands = 4;
break;
}
if (needDecode) decodeIdat();
int components = inputBands;
if ((colorType & 4) != 0) --components;
int bpc = bitDepth;
if (bpc == 16) bpc = 8;
Image img;
if (image != null) img = Image.getInstance(width, height, components, bpc, image);
else {
img = new ImgRaw(width, height, components, bpc, idat.toByteArray());
img.setDeflated(true);
PdfDictionary decodeparms = new PdfDictionary();
decodeparms.put(PdfName.BITSPERCOMPONENT, new PdfNumber(bitDepth));
decodeparms.put(PdfName.PREDICTOR, new PdfNumber(15));
decodeparms.put(PdfName.COLUMNS, new PdfNumber(width));
decodeparms.put(
PdfName.COLORS, new PdfNumber((colorType == 3 || (colorType & 2) == 0) ? 1 : 3));
additional.put(PdfName.DECODEPARMS, decodeparms);
}
if (additional.get(PdfName.COLORSPACE) == null)
additional.put(PdfName.COLORSPACE, getColorspace());
if (intent != null) additional.put(PdfName.INTENT, intent);
if (additional.size() > 0) img.setAdditional(additional);
if (icc_profile != null) img.tagICC(icc_profile);
if (palShades) {
Image im2 = Image.getInstance(width, height, 1, 8, smask);
im2.makeMask();
img.setImageMask(im2);
}
if (genBWMask) {
Image im2 = Image.getInstance(width, height, 1, 1, smask);
im2.makeMask();
img.setImageMask(im2);
}
img.setDpi(dpiX, dpiY);
img.setXYRatio(XYRatio);
img.setOriginalType(Image.ORIGINAL_PNG);
return img;
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* 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();
}
}
private boolean drawImage(
Image img, Image mask, AffineTransform xform, Color bgColor, ImageObserver obs) {
if (xform == null) return true;
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;
// ssteward: cut out com.sun.image.codec.jpeg code
if (true || !convertImagesToJPEG) {
image = com.lowagie.text.Image.getInstance(img, bgColor);
convertImagesToJPEG = false; // ssteward
} else {
/* ssteward
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();
com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(baos);
com.sun.image.codec.jpeg.JPEGEncodeParam param = com.sun.image.codec.jpeg.JPEGCodec.getDefaultJPEGEncodeParam(scaled);
param.setQuality(jpegQuality, true);
encoder.encode(scaled, param);
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.setInvertMask(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]);
} catch (Exception ex) {
throw new IllegalArgumentException();
}
if (currentFillGState != 255) {
PdfGState gs = fillGState[currentFillGState];
cb.setGState(gs);
}
return true;
}
