List of usage examples for org.apache.pdfbox.pdmodel.graphics.color PDDeviceGray PDDeviceGray
private PDDeviceGray()
From source file:pdfpicmangler.PDPng.java
License:Open Source License
/** * Construct from a stream.//from w w w .ja v a2 s. co m * * @param doc The document to create the image as part of. * @param is The stream that contains the png data. * @throws IOException If there is an error reading the png data. */ public PDPng(PDDocument doc, InputStream is) throws IOException { super(doc, "png"); System.out.println("reading in png"); COSDictionary dic = getCOSStream(); dic.setItem(COSName.SUBTYPE, COSName.IMAGE); //dic.setItem(COSName.TYPE, COSName.XOBJECT); data = getCOSStream().createFilteredStream(); readPng(is); setWidth(imageWidth); setHeight(imageHeight); dic.setInt(COSName.BITS_PER_COMPONENT, bitDepth); if ((colorType & PNG_TYPE_PALETTE) != 0) { getCOSStream().setItem(COSName.COLORSPACE, paldata); } else if ((colorType & PNG_TYPE_COLOR) != 0) { setColorSpace(PDDeviceRGB.INSTANCE); } else { setColorSpace(new PDDeviceGray()); } COSDictionary filterParams = new COSDictionary(); filterParams.setInt(COSName.PREDICTOR, 15); // png adaptive predictor filterParams.setInt(COSName.COLORS, ((colorType & PNG_TYPE_COLOR) == 0 || (colorType & PNG_TYPE_PALETTE) != 0) ? 1 : 3); filterParams.setInt(COSName.BITS_PER_COMPONENT, bitDepth); filterParams.setInt(COSName.COLUMNS, imageWidth); filterParams.setDirect(true); dic.setItem(COSName.DECODE_PARMS, filterParams); dic.setItem(COSName.FILTER, COSName.FLATE_DECODE); dic.setInt(COSName.LENGTH, dataLen); dic.getDictionaryObject(COSName.LENGTH).setDirect(true); }