Java Code Examples for com.itextpdf.text.pdf.PdfContentByte#beginLayer()

public static byte[] stampLayer(InputStream _pdfFile, Image iImage, int x, int y, String layername, boolean readLayers) throws IOException, DocumentException
{
    PdfReader reader = new PdfReader(_pdfFile);

    try (   ByteArrayOutputStream ms = new ByteArrayOutputStream()  )
    {
        PdfStamper stamper = new PdfStamper(reader, ms);
        //Don't delete otherwise the stamper flattens the layers
        if (readLayers)
            stamper.getPdfLayers();

        PdfLayer logoLayer = new PdfLayer(layername, stamper.getWriter());
        PdfContentByte cb = stamper.getUnderContent(1);
        cb.beginLayer(logoLayer);

        //300dpi
        iImage.scalePercent(24f);
        iImage.setAbsolutePosition(x, y);
        cb.addImage(iImage);

        cb.endLayer();
        stamper.close();

        return (ms.toByteArray());
    }
}
 

private void addTextAndImage(PcGtsType pc, int cutoffLeft, int cutoffTop, Image img, boolean imageOnly, ExportCache cache) throws DocumentException, IOException {
		lineAndColorList.clear();
		
		PdfContentByte cb = writer.getDirectContentUnder();

		cb.setColorFill(BaseColor.BLACK);
		cb.setColorStroke(BaseColor.BLACK);
		//BaseFont bf = BaseFont.createFont(BaseFont.TIMES_ROMAN, "UTF-8", BaseFont.NOT_EMBEDDED);
		if (!imageOnly){
			cb.beginLayer(ocrLayer);
			//cb.setFontAndSize(bfArial, 32);
			cb.setFontAndSize(mainExportBaseFont, 32);
					
			List<TrpRegionType> regions = pc.getPage().getTextRegionOrImageRegionOrLineDrawingRegion();
			
			/*
			 * use reading order comparator for sorting since at this time reading order is more trustable
			 * other sorting is not transitive and seldomly produces "Comparison violates its general contract" exception
			 */
//			Collections.sort(regions, new TrpElementReadingOrderComparator<RegionType>(true));
			TrpShapeTypeUtils.sortShapesByReadingOrderOrCoordinates(regions);
	
			for(RegionType r : regions){
				//TODO add paths for tables etc.
				if (r instanceof TrpTableRegionType){
					
					exportTable(r, cb, cutoffLeft, cutoffTop, false, cache);

				}
				else if(r instanceof TextRegionType){
					TextRegionType tr = (TextRegionType)r;
					//PageXmlUtils.buildPolygon(tr.getCoords().getPoints()).getBounds().getMinX();
					addTextFromTextRegion(tr, cb, cutoffLeft, cutoffTop, mainExportBaseFont, cache);
				}
			}
			
			//scale after calculating lineMeanHeightForAllRegions
			//lineMeanHeight = lineMeanHeight/scaleFactorX;
			
			cb.endLayer();
		}
				
		cb.beginLayer(imgLayer);		
		cb.addImage(img);
		cb.endLayer();
		
		if (highlightTags || highlightArticles){
			
			highlightAllTagsOnImg(lineAndColorList, cb, cutoffLeft, cutoffTop);
		}
		
		/*
		 * draw tag lines
		 */
		

		
//		addTocLinks(doc, page,cutoffTop);
	}
 

private void addUniformText(PcGtsType pc, int cutoffLeft, int cutoffTop, ExportCache cache) throws DocumentException, IOException {
		PdfContentByte cb = writer.getDirectContentUnder();
		cb.setColorFill(BaseColor.BLACK);
		cb.setColorStroke(BaseColor.BLACK);
	    /** The path to the font. */
	    //FontFactory.register("c:/windows/fonts/arialbd.ttf");
		//BaseFont bf = BaseFont.createFont("/fonts/arialbd.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
		
		cb.beginLayer(ocrLayer);
		//FontFactory.register("arialbd.ttf", "my_bold_font");
		//Font fontTest = FontFactory.getFont("arialbd.ttf", Font.BOLDITALIC);
		
		cb.setFontAndSize(mainExportBaseFont, 10);
				
		List<TrpRegionType> regions = pc.getPage().getTextRegionOrImageRegionOrLineDrawingRegion();
		
		/*
		 * use reading order comparator for sorting since at this time reading order is more trustable
		 * other sorting is not transitive and seldomly produces "Comparison violates its general contract" exception
		 */
//		Collections.sort(regions, new TrpElementReadingOrderComparator<RegionType>(true));
		TrpShapeTypeUtils.sortShapesByReadingOrderOrCoordinates(regions);
		
		float textBlockXStart = 0;

		int i = 0;
		for(TrpRegionType r : regions){
			//TODO add paths for tables etc.			
			if (r instanceof TrpTableRegionType){
				exportTable(r, cb, cutoffLeft, cutoffTop, true, cache);
			}
			else if(r instanceof TrpTextRegionType){
				TrpTextRegionType tr = (TrpTextRegionType) r;
				
				//compute average text region start
				//textBlockXStart = (float) (PageXmlUtils.buildPolygon(tr.getCoords().getPoints()).getBounds().getMinX());
				//double minX = PageXmlUtils.buildPolygon(tr.getCoords().getPoints()).getBounds().getMinX();
				//this should result in the the same value as the method in the line above which is deprecated
				double minX = tr.getBoundingBox().getMinX();
				double maxX = tr.getBoundingBox().getMaxX();
				double trWidth = tr.getBoundingBox().getWidth();
				
//				logger.debug("region "+ ++i);
//				logger.debug("region minX " + minX);
//				logger.debug("region maxX " + tr.getBoundingBox().getMaxX());

				//if there is only one text region at this vertical section start the text block at the second twelfth
				//if (hasSmallerColumn(regions, tr)){
				if (isOnlyRegionInThisRow(regions, tr)){
				//if (regions.size() == 1){
					logger.debug("only one region in this row!!");
					//indent start of text block under certain preconditions
					if (minX < twelfthPoints[1][0] && (twelfthPoints[1][0] < maxX && trWidth > twelfthPoints[2][0])){
						textBlockXStart = twelfthPoints[1][0];
					}
					//if textregion contains only one line this is probably a headline
					else if (tr.getTextLine().size() == 1){
						//logger.debug("tr.getTextLine().size() == 1 ");
						textBlockXStart = getPrintregionStartX((float) (minX), tr.getBoundingBox().getMaxX());
					}
					else if (twelfthPoints[2][0] < maxX && trWidth > twelfthPoints[3][0]){
						//logger.debug("twelfthPoints[2][0] < tr.getBoundingBox().getMaxX() ");
						textBlockXStart = twelfthPoints[2][0];
					}
					else{
						textBlockXStart = (float) minX;
					}
				}
				else{
					
					logger.debug("several columns found, minX of text region is : " + minX);
					//float startWithThisX = (float) (minX < smallerRegionMaxX ? smallerRegionMaxX : minX);
					//textBlockXStart = getPrintregionStartX((float) (startWithThisX));
					
					/*
					 * this is then used for all lines of a region as start point
					 */
					textBlockXStart = getAverageBeginningOfBaselines(tr);
					textBlockXStart += 40;

				}
				//logger.debug("textBlockXStart " + textBlockXStart);
				addUniformTextFromTextRegion(tr, cb, cutoffLeft, cutoffTop, mainExportBaseFont, textBlockXStart, cache);
			}
		}
		
		cb.endLayer();	
		
//		addTocLinks(doc, page,cutoffTop);
	}