I use PDFBox 1.8.8 and try to overlay a PDDocument with an other document by using the following scala method
def mergeTest() = {
val home = System.getProperty("user.home")
val doc = PDDocument.load(home + "/tmp/document.pdf")
val ovl = PDDocument.load(home + "/tmp/overlay.pdf")
val ov = new Overlay()
val mergeDoc = ov.overlay(ovl, doc)
mergeDoc.save(home + "/tmp/result.pdf")
doc.close()
ovl.close()
mergeDoc.close()
}
I have expected to get every page of "document.pdf" (N pages) overlayed with the content of "overlay.pdf" (1 page).
As a result in "result.pdf" there are as many pages as in "document.pdf", however the original content of "document.pdf" is completely overwritten by the content of the overlay.
The cause
The OP's overlay.pdf page content starts with
/Cs1 cs
1 sc
0.1400146 841.945 m
595.14 841.945 l
595.14 -0.05499268 l
0.1400146 -0.05499268 l
h
f
0.1400146 841.945 m
595.14 841.945 l
595.14 -0.05499268 l
0.1400146 -0.05499268 l
h
f
These operations draw two white (CS1 is a grayscale color space) rectangles covering nearly the whole MediaBox [0, 0, 595.28, 841.89] with the exception of a very slim line at the top and at the left
Laying this page content over another page, therefore, completely covers all existing content of that other page which is exactly what you have observed:
the original content of "document.pdf" is completely overwritten by the content of the overlay
It usually only makes sense to overlay with a page which does not cover everything.
A work-around using blend mode Darken
Alternatively you might want to try overlaying using the blend mode Darken which selects the darker of the backdrop and source colours, the backdrop is replaced with the source where the source is darker; otherwise, it is left unchanged.
In Java (I have no experience with Scala, so I hope you can make use of Java source) you can use methods like these:
void overlayWithDarkenBlendMode(PDDocument document, PDDocument overlay) throws IOException
{
PDXObjectForm xobject = importAsXObject(document, (PDPage) overlay.getDocumentCatalog().getAllPages().get(0));
PDExtendedGraphicsState darken = new PDExtendedGraphicsState();
darken.getCOSDictionary().setName("BM", "Darken");
List<PDPage> pages = document.getDocumentCatalog().getAllPages();
for (PDPage page: pages)
{
Map<String, PDExtendedGraphicsState> states = page.getResources().getGraphicsStates();
if (states == null)
states = new HashMap<String, PDExtendedGraphicsState>();
String darkenKey = MapUtil.getNextUniqueKey(states, "Dkn");
states.put(darkenKey, darken);
page.getResources().setGraphicsStates(states);
PDPageContentStream stream = new PDPageContentStream(document, page, true, false, true);
stream.appendRawCommands(String.format("/%s gs ", darkenKey));
stream.drawXObject(xobject, 0, 0, 1, 1);
stream.close();
}
}
PDXObjectForm importAsXObject(PDDocument target, PDPage page) throws IOException
{
final PDStream xobjectStream = new PDStream(target, page.getContents().createInputStream(), false);
final PDXObjectForm xobject = new PDXObjectForm(xobjectStream);
xobject.setResources(page.findResources());
xobject.setBBox(page.findCropBox());
COSDictionary group = new COSDictionary();
group.setName("S", "Transparency");
group.setBoolean(COSName.getPDFName("K"), true);
xobject.getCOSStream().setItem(COSName.getPDFName("Group"), group);
return xobject;
}
(OverlayWithEffect.java)
Applying them to your sample documents
#Test
public void testOverlayWithDarkenVolker() throws COSVisitorException, IOException
{
try ( InputStream sourceStream = getClass().getResourceAsStream("document1.pdf");
InputStream overlayStream = getClass().getResourceAsStream("overlay.pdf") )
{
final PDDocument document = PDDocument.load(sourceStream);
final PDDocument overlay = PDDocument.load(overlayStream);
overlayWithDarkenBlendMode(document, overlay);
document.save(new File(RESULT_FOLDER, "document1-with-overlay.pdf"));
}
}
results in
As you see, both the numbers from document1.pdf and the lines from overlay.pdf are there.
Beware! This code is a proof-of-concept and not ready for general productive use. It e.g. completely ignores Rotate page entries...
Related
I'm using iTextSharp to display images in a pdf report. Here I want display two images in a row and it's working as expected but having a issue when end of the page reaches. The issue is that last row images get shrink to fit in same page, it doesn't automatically add it to the next page. All images having same dimension and resolution.
Please, provide us with the code.
I wrote the test below (although it's in java, there should be no problem) and the results seem to be correct.
public void tableWithImagesTest01() throws IOException, InterruptedException {
String testName = "tableWithImagesTest01.pdf";
String outFileName = destinationFolder + testName;
String cmpFileName = sourceFolder + "cmp_" + testName;
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outFileName));
Document doc = new Document(pdfDoc, PageSize.A3);
Image image1 = new Image(ImageDataFactory.create(sourceFolder + "itis.jpg"));
Table table = new Table(2);
for (int i = 0; i < 20; i++) {
table.addCell(new Cell().add(image1));
table.addCell(new Cell().add(image1));
table.addCell(new Cell().add(new Paragraph("Hello")));
table.addCell(new Cell().add(new Paragraph("World")));
}
doc.add(table);
doc.close();
Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder, "diff"));
}
The result pdf looks like this:
Maybe you use summat image1.setAutoScale(true);? Still we need your code to look at.
The easiest solution (considering all images have the same dimension and resolution) would be to manually insert a new page and pagebreak every time you have inserted the maximum number of images to a page.
Taken from a comment below, the solution that works is, on the individual images you need to set:
image.ScaleToFitHeight = false;
Likely to happen when keeping rows together
I am attempting to use TextMarginFinder to prove that odd and even pages back up correctly when printing. I have based my code on:
http://itextpdf.com/examples/iia.php?id=280
The issue I have is that on odd pages I am looking for the box to be aligned to the left showing a 1CM back margin for example, and on an even page I would expect the page box to be aligned to the right also showing a 1CM back margin. Even in the example above this is not the case, but when printed the text does back up perfectly because the Trim Box conforms.
In summary I believe on certain PDF files the TextMarginFinder is incorrectly locating the text width, usually on Even pages. This is evident by the width being greater than the actual text. This is usually the case if there are slug marks outside of the Media Box area.
In the PDF the OP pointed to (margins.pdf from the iText samples themselves) indeed the box is not flush with the text:
If you look into the PDF Content, though, you'll see that many of the lines have a trailing space character, e.g. the first line:
(s I have worn out since I started my ) Tj
These trailing space characters are part of the text and, therefore, the box does not flush with the visible text but it does with the text including such space characters.
If you want to ignore such space characters, you can try doing so by filtering such trailing spaces (or for the sake of simplicity all spaces) before they get fed into the TextMarginFinder. To do this I'd explode the TextRenderInfo instances character-wise and then filter those which trim to empty strings.
A helper class to explode the render info objects:
import com.itextpdf.text.pdf.parser.ImageRenderInfo;
import com.itextpdf.text.pdf.parser.RenderListener;
import com.itextpdf.text.pdf.parser.TextRenderInfo;
public class TextRenderInfoSplitter implements RenderListener
{
public TextRenderInfoSplitter(RenderListener strategy) {
this.strategy = strategy;
}
public void renderText(TextRenderInfo renderInfo) {
for (TextRenderInfo info : renderInfo.getCharacterRenderInfos()) {
strategy.renderText(info);
}
}
public void beginTextBlock() {
strategy.beginTextBlock();
}
public void endTextBlock() {
strategy.endTextBlock();
}
public void renderImage(ImageRenderInfo renderInfo) {
strategy.renderImage(renderInfo);
}
final RenderListener strategy;
}
Using this helper you can update the iText sample like this:
RenderFilter spaceFilter = new RenderFilter() {
public boolean allowText(TextRenderInfo renderInfo) {
return renderInfo != null && renderInfo.getText().trim().length() > 0;
}
};
PdfReader reader = new PdfReader(src);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(RESULT));
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
TextMarginFinder finder = new TextMarginFinder();
FilteredRenderListener filtered = new FilteredRenderListener(finder, spaceFilter);
parser.processContent(i, new TextRenderInfoSplitter(filtered));
PdfContentByte cb = stamper.getOverContent(i);
cb.rectangle(finder.getLlx(), finder.getLly(), finder.getWidth(), finder.getHeight());
cb.stroke();
}
stamper.close();
reader.close();
The result:
In case of slug area text etc you might want to filter more, e.g. anything outside the crop box.
Beware, though, there might be fonts in which the space character is not invisible, e.g. a font of boxed characters. Taking the spaces out of the equation in that case would be wrong.
I have the following code that generates a pdf into the stream. This works well but i now have the following requirements.
1) make page landscape: Looking at other examples they add the property to the document object. But i'm doing this instream. So how would i add this property?
2) Add page numbers. I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page. How can this kind of feature be acheived with Itext sharp.
public static void Create(ICollection<Part> parts, string path)
{
PdfReader reader = new PdfReader(path);
var pageWidth = 500;
byte[] bytes;
using (MemoryStream ms = new MemoryStream())
{
using (PdfStamper stamper = new PdfStamper(reader, ms))
{
PdfContentByte cb = stamper.GetOverContent(1);
//Flush the PdfStamper's buffer
stamper.Close();
//Get the raw bytes of the PDF
bytes = ms.ToArray();
var now = String.Format("{0:d-M-yyyy}", DateTime.Now);
var pdfName = string.Format("{0}_factory_worksheet", now).Replace("%", "").Replace(" ", "_");
var context = HttpContext.Current;
context.Response.ContentType = "application/pdf";
context.Response.AddHeader("content-disposition", "attachment;filename=" + pdfName);
context.Response.Buffer = true;
context.Response.Clear();
context.Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
context.Response.OutputStream.Flush();
context.Response.End();
}
}
}
I don't really know how you handling it C# but logical flow will be like this:
Use PdfDictionary to rotate content in reader to 90 degree.Assuming your pdf contain multiple pages,
PdfReader reader = new PdfReader(path);
for (int pgCnt=1; pgCnt <= reader.getNumberOfPages(); pgCnt++) {
//Logic to implement rotation & Add Page number
}
To get current rotation(assuming you are using Portrait mode & try to convert it in landscape mode) use int rttnPg = reader.getPageRotation(pgCnt); also get the PdfDictionary of that page pgDctnry=reader.getPageN(i);(I named that variable as pgDctnry)
Now to rotate it in 90 degree use
pgDctnry.put(PdfName.ROTATE, new PdfNumber(rttnPg+90));
Now bind it using PdfStamper as you are currently doing it.Now to add page number get over content(here i named it pgCntntBt) of the current page
pgCntntBt = stamper .getOverContent(pgCnt);
rctPgSz = rdrPgr.getPageSizeWithRotation(pgCnt);
pgCntntBt.beginText();
bfUsed=//Base Font used for text to be displayed.Also set font size pgCntntBt.setFontAndSize(bfUsed,8.2f);
txtPg=String.format(pgTxt+" %d/%d",pgCnt,totPgCnt);
pgCntntBt.showTextAligned(2,txtPg,//Put Width,//Put Height,//Rotation);
pgCntntBt.endText();
Actually i don't understand what you mean by this:"I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page".Now close the stamper to flush it in outputstream.
I need to display an unknown quantity of tabs each with an unknown quantity of graphs (Google Visualizations). I have created "Tab" and "Graph" classes and Tab contains an ArrayList.
TabWrappers extends FlexTable and is currently empty. It's a place holder at the moment, but the behavior does not change if I use FlexTable rather than TabWrapper.
The code below, minus the section that adds Tab2 works perfectly for creating 1 tab populated with graphs. When adding the 2nd tab both tabs are displayed and named correctly but neither have graphs.
public class SomeClass {
...
DataTable data = response.getDataTable();
DataView result;
Options options = createOptions();
ArrayList<Tab> displayTab = new ArrayList<Tab>();
Tab t;
ArrayList<Graph> graphList = new ArrayList<Graph>();
Graph g;
t = new Tab();
g = new Graph();
result = DataView.create(data);
result.setRows(new int[]{0, 2, 4, 6});
g.setGraphType(new PieChart(result, options));
graphList.add(g);
g = new Graph();
result = DataView.create(data);
result.setRows(new int[]{1, 3, 5, 7});
g.setGraphType(new PieChart(result, options));
graphList.add(g);
g = new Graph();
result = DataView.create(data);
g.setGraphType(new PieChart(result, options));
graphList.add(g);
t.setTabName("Tab1");
t.setGraphs(graphList);
displayTab.add(t);
// Add a 2nd tab
t = new Tab();
t.setTabName("Tab2");
t.setGraphs(graphList);
displayTab.add(t);
TabWrapper tabWrapper;
for (Tab tX : displayTab){
int row = 0, col = 0, maxCol = 2;
tabWrapper = new TabWrapper();
for (Graph gX : tX.getGraphs()) {
col = tX.getGraphs().indexOf(gX) - (row * maxCol);
tabWrapper.setWidget(row, col, gX.getGraphType().asWidget());
if (++col == maxCol) {
row++;
}
}
tabPanel.add(tabWrapper, tX.getTabName());
}
...
}
When you use tabs in GWT, the panels held in each tab seem to be lazy loaded and aren't completely set up until the user clicks on each tab.
In particular, the tab containers will have zero widths and heights (the error logs will probably be giving an error about containers having zero width) so the graph drawing will fail and leave an empty space.
What you need to do (and is probably good practice anyway) is to lazy load the contents of the tabs too so that the graph is loaded only when the tab is fully set up. This can be done by removing the call the t.setGraphs(...) and adding a selection handler that does it instead:
tabPanel.addSelectionHandler(new SelectionHandler<Integer> () {
public void onSelection(SelectionEvent<Integer> event) {
// Pseudocode:
// n = event.getSelectedItem()
// t = displayTab[n]
// g = graphList[n]
// t.setGraphs(g)
}
});
so that graphs are added and drawn only when the tab is selected.
You'll probably also want to call
tabPanel.selectTab(0);
to force a selection of the first tab after the selection handler is in place.
I had the same issues that you describe and this resolved it.
I'm having a problem trying to locate a PdfContentByte directly into an specific page. My problem is: I need to add an Image for each page (That works) and need to add a QRCode to each of the pages at the right bottom corner but this works only for the first Page and I don't know how to repeat it on the other ones.
This is my code:
public string GeneratePDFDocument(Atomic.Development.Montenegro.Data.Entities.Document document, Stamp stamp)
{
string filename = #"C:\Users\Sheldon\Desktop\Pdf.Pdf";
FileStream fs = new FileStream(filename, FileMode.Create);
iTextSharp.text.Document pdfDocument = new iTextSharp.text.Document(PageSize.LETTER, PAGE_LEFT_MARGIN, PAGE_RIGHT_MARGIN, PAGE_TOP_MARGIN, PAGE_BOTTOM_MARGIN);
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(pdfDocument, fs);
pdfDocument.Open();
int count = document.Pages.Count;
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
pdfDocument.Close();
writer.Close();
fs.Close();
return filename;
}
private static void PlaceCodeBar(iTextSharp.text.pdf.PdfWriter writer)
{
String codeText = "TEXT TO ENCODE";
iTextSharp.text.pdf.BarcodePDF417 pdf417 = new iTextSharp.text.pdf.BarcodePDF417();
pdf417.SetText(codeText);
Image img = pdf417.GetImage();
iTextSharp.text.pdf.BarcodeQRCode qrcode = new iTextSharp.text.pdf.BarcodeQRCode(codeText, 1, 1, null);
img = qrcode.GetImage();
iTextSharp.text.pdf.PdfContentByte cb = writer.DirectContent;
cb.SaveState();
cb.BeginText();
img.SetAbsolutePosition(PageSize.LETTER.Width-PAGE_RIGHT_MARGIN-img.ScaledWidth, PAGE_BOTTOM_MARGIN);
cb.AddImage(img);
cb.EndText();
cb.RestoreState();
}
So add it in your foreach (Page...) loop:
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
If this is a second pass on the same PDF (you've closed it then opened it again), use a PdfStamper rather than a PdfWriter. You can then get the direct content of each page rather than the one direct content that is reused (and reset) for each page.
PS: Drop the BeginText() and EndText() calls. Those operators should only be used when actually drawing text/setting fonts/etc. No line art. No images. The SaveState()/RestoreState() are good though. Definitely keep those.
I just figure out how to solve the problem. Just delete the cb.SaveState() and cb.RestoreState() and it put the image on the page is actually active.