List of usage examples for com.lowagie.text.pdf PRStream setData
public void setData(byte[] data, boolean compress, int compressionLevel)
From source file:questions.images.ResizeImage.java
public static void resizeImagesInPage(PdfReader reader, int page, float factor) throws IOException { PdfDictionary pageDictionary = reader.getPageN(page); PdfDictionary resources = (PdfDictionary) PdfReader.getPdfObject(pageDictionary.get(PdfName.RESOURCES)); PdfDictionary xobjects = (PdfDictionary) PdfReader.getPdfObject(resources.get(PdfName.XOBJECT)); if (xobjects != null) { for (Object xObjectKey : xobjects.getKeys()) { PdfName xobjectName = (PdfName) xObjectKey; PdfObject xobj = xobjects.get(xobjectName); PRStream imageStream = (PRStream) PdfReader.getPdfObject(xobj); PdfName subtype = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.SUBTYPE)); PdfName filter = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.FILTER)); if (PdfName.IMAGE.equals(subtype) && PdfName.DCTDECODE.equals(filter)) { BufferedImage src = ImageIO .read(new ByteArrayInputStream(PdfReader.getStreamBytesRaw(imageStream))); int width = (int) (src.getWidth() * factor); int height = (int) (src.getHeight() * factor); BufferedImage dest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); AffineTransform at = AffineTransform.getScaleInstance(factor, factor); Graphics2D g = dest.createGraphics(); g.drawRenderedImage(src, at); ByteArrayOutputStream newImage = new ByteArrayOutputStream(); ImageIO.write(dest, "JPG", newImage); imageStream.setData(newImage.toByteArray(), false, PRStream.NO_COMPRESSION); imageStream.put(PdfName.WIDTH, new PdfNumber(width)); imageStream.put(PdfName.HEIGHT, new PdfNumber(height)); imageStream.put(PdfName.FILTER, PdfName.DCTDECODE); }/*w w w .j ava 2 s . co m*/ } } }