I'm trying to develop an application to watermark PDF's. I'm having an issue with saving the PDF document in the correct format.
I've noticed that some documents when pulled in will read the page size as one thing but when I go to save the document part of it will be cut off. For example I have a document saved in landscape at 792x612 pts which correlates to a letter size. However when saved in letter it cuts part of the page off. I noticed that if I save the document in A1 that the entire document will then be present. Here is my code:
Dim gfx As XGraphics = XGraphics.FromPdfPage(page, XGraphicsPdfPageOptions.Append)
gfx.RotateTransform(-90)
Dim font As XFont = New XFont("Times New Romans", 6, XFontStyle.Bold)
Dim tf As XTextFormatter = New XTextFormatter(gfx)
Dim rect As XRect = New XRect(-550, 500, 250, 150)
gfx.DrawRectangle(XBrushes.Transparent, rect)
tf.DrawString(Text, font, XBrushes.Red, rect)
page.Size = PdfSharp.PageSize.A1
page.Orientation = PdfSharp.PageOrientation.Landscape
Doc.save(strFileSaveLocation)
Is there any reason why this could be happening? I am reading the page.height and page.width and confirming these to be correct before continuing.
There is a known bug in PDFsharp when it comes to handling pages in landscape format. This bug is present up to PDFsharp 1.50 beta 3b, but should be fixed with the next release.
See discussion in the PDFsharp forum:
http://forum.pdfsharp.net/viewtopic.php?p=9591#p9591
Suggested fix in PdfPage.cs:
internal PdfPage(PdfDictionary dict)
: base(dict)
{
// Set Orientation depending on /Rotate.
//int rotate = Elements.GetInteger(InheritablePageKeys.Rotate);
//if (Math.Abs((rotate / 90)) % 2 == 1)
// _orientation = PageOrientation.Landscape;
}
If you do not want to modify PDFsharp, maybe try the workaround from the first post:
http://forum.pdfsharp.net/viewtopic.php?p=9587#p9587
For others running into the same issue as me, the answer is to simply set the orientation to portrait. This for some reason will trigger the document to save correctly. The answer by PDFsharp Novice will allow you to fix your code to some extent, but if you're like me and need to know the orientation in order to process the page the solution is setting the orientation back to portrait. You may need to reset page width and height also.
Code:
page.Orientation = PdfSharp.PageOrientation.Portrait
page.Width = dblPageWidth
page.Height = dblPageHeight
Related
I am trying to create a PDF using MigraDoc Library. I can add an image, but unable to rotate images. I am creating a MigraDoc.DocumentObjectModel.Shapes.Image object to add the image to a section. Is it possible to rotate the image or do I have to add the image another way?
Public Sub AddImageToPDFFile(sec As Section)
Dim image As Image
Dim strImagePath = "image.jpg"
image = sec.AddImage(strImagePath)
image.Height = "10cm"
image.LockAspectRatio = True
image.RelativeVertical = RelativeVertical.Line
image.RelativeHorizontal = RelativeHorizontal.Margin
image.Top = ShapePosition.Top
image.Left = ShapePosition.Left
image.WrapFormat.Style = WrapStyle.Through
End Sub
I'm afraid MigraDoc cannot rotate the image.
Maybe rotate the image with code before adding it to MigraDoc.
It might also be possible, depending on your requirements, to add the image later using PDFsharp. MigraDoc uses PDFsharp to create the PDF and thus you can use PDFsharp for modifications without adding an additional tool to the process.
I'm currently creating a PDF with PdfSharp which mostly consists of text and some images.
The text elements have different colors. My problem is that as soon as I use a different color than the color I started with, the text is not visible in the resulting PDF (e.g. I start with black text, switch to a red text, the red text is not visible). All text elements are in the resulting PDF (I can select them), but the red elements are invisible.
So here is the code:
// Create a new PDF document with one page
var document = new PdfDocument();
var page = document.AddPage();
page.Width = 800;
page.Height = 600;
var defaultFont = new XFont("Arial", 12, XFontStyle.Regular, new XPdfFontOptions(PdfFontEmbedding.Always));
var gfx = XGraphics.FromPdfPage(page);
// black text
gfx.DrawString("black", defaultFont, XBrushes.Black, new XRect(x, y, width, height), XStringFormats.Center);
// red text
gfx.DrawString("red", defaultFont, XBrushes.Red, new XRect(x2, y2, width2, height2), XStringFormats.Center);
I've already found a solution (re-creating the XGraphics object) but it's quiete messy because it needs to be called after each color change:
// ...
// black text
gfx.DrawString("black", defaultFont, XBrushes.Black, new XRect(x, y, width, height), XStringFormats.Center);
// disposing the old graphics context and creating a new one seems to help
gfx.Dispose();
gfx = XGraphics.FromPdfPage(page);
// red text
gfx.DrawString("red", defaultFont, XBrushes.Red, new XRect(x2, y2, width2, height2), XStringFormats.Center);
I guess there is a better solution, but I couldn't find one yet.
Edit
As suggested in this answer, I wanted to create a SSCCE. During the creation I found the actual bug. Instead of XBrushes.Red I used an own defined XBrush, but didn't mention it in the above code snippet, because I thought it was unnecessary.
As already mentioned in the last section of the question, I used an own defined brush instead of XBrushes.Red.
I defined it the following way:
XBrush redBrush = new XSolidBrush(new XColor {R = 207, G = 0, B = 44});
This way the brush only worked after I disposed the graphics object and created a new one. But after some googling I found the correct way to define a brush:
XBrush redBrush = new XSolidBrush(XColor.FromArgb(207, 0, 44));
I tried to replicate your problem using your code snippet and PDFsharp version 1.32. I used VS Express 2013 which automatically converted all projects to .NET 4.5.
I tried both builds (GDI+ and WPF) and all colours worked fine for me.
So instead of just a code snippet you should provide an SSCCE.
See also:
http://forum.pdfsharp.net/viewtopic.php?p=2094#p2094
I am using GDI+ to draw the initial image on PictureBox - which renders a clean image. I am trying to then capture that drawing and draw it on a PDF using PDFSharp which works, but comes out blurry. I am sure it has something to do with the fact I have changed the destination Rectangle's size. What do i need to do to clean it up?
Code:
Dim bmp As New Bitmap(pb.Width, pb.Height)
Dim pdf As New PdfDocument
Dim page As PdfPage = pdf.AddPage
Dim g As XGraphics = XGraphics.FromPdfPage(page)
pb.DrawToBitmap(bmp, New Rectangle(pb.ClientRectangle.X, pb.ClientRectangle.Y, pb.Width, pb.Height + 20))
g.SmoothingMode = XSmoothingMode.AntiAlias
g.DrawImage(bmp, New XRect(New RectangleF(20, 0, 600, 800)))
pdf.Save(_path)
It's the anti-aliasing that makes images blurry.
AFAIK Adobe Reader draws images with anti-aliasing when used with PDFsharp.
With PDFsharp create an XImage from your BMP and then set
image.Interpolate = false;
for that XImage. This will give a hint to Adobe Reader that anti-aliasing is not wanted for that image.
With respect to screen shots, anti-aliasing is useful when scaling down (e.g. when taking a 400x300 bitmap from an 800x600 screen), but not when scaling up (like Adobe Reader will do with images embedded in PDF files).
See also:
http://forum.pdfsharp.net/viewtopic.php?p=5370#p5370
If you scale an image up, it will come out blurred. There is no other way since there are no additional information in the image and it will just be interpolated in some way. There is no "Zoom in and ENHANCE"-button. :-)
What I did in one of my programs where I wanted to save a controls current look to a file, was to first scale the control to the desired size, then draw it to the bitmap, then resize it down again.
If this works depends on the content of the control of course, wether it's scalable or not and so on.
e.g.
In the example below I have a Chart control that I work with in my export dialog called workingChart.
The steps that are used are:
Save old size
Resize chart to the desired size
Draw control to bitmap
Resize chart back to the old size
This works well and the image comes out crisp, since you do not resize the image itself.
Private Function GetChartScaledImage(wantsize As Size) As Bitmap
Dim oldsize As Size = workingChart.Size
Dim bmp As New Bitmap(wantsize.Width, wantsize.Height)
workingChart.Size = wantsize
workingChart.DrawToBitmap(bmp, New Rectangle(0, 0, wantsize.Width, wantsize.Height))
workingChart.Size = oldsize
Return bmp
End Function
I generating ID Cards of Students of My College in a PDF file using ASP.NET (Framework 3.5) and Crystal Reports But I Want to print the Cards in a Transparent Sheet and Paste it on a Plastic Card of same size for that i need the everything to be printed mirrored.
I tried designing the crystal reports in mirrored form itself but could not find a way to write text in mirrored form. Can anyone suggest a way to do this work all I want is to Flip the contents in PDF File or in Crystal Report.
A couple of Ideas:
1) Render the PDF to an Image (using Ghostscript/ImageMagick or commercial PDF library( (eg Tif) and mirror the image for printing
2) Mirror the PDF Itself, might be possible with iTextSharp
3) Use the reporting tool and try and use some kind of reverse font (coud be quick option)
Any API that lets you import pages and write directly to the PDF content stream will let you do this.
In iText (Java), it'd look something like this:
PdfReader reader = new PdfReader(pdfPath);
Document doc = new Document();
PdfWriter writer = PdfWriter.getInstance( doc, new FileOutputStream(outPath) );
for (int pageNum = 1; pageNum <= reader.getNumberOfPages(); ++pageNum) {
PdfImportedPage page = writer.getImportedPage(reader, pageNum);
PdfContentByte pageContent = writer.getDirectContent();
// flip around vertical axis
pageContent.addTemplate(page, 1f, 0f, 0f, -1f, page.getWidth(), 0f);
doc.newPage();
}
The above code is making the following ass-u-me-ptions:
The default Document() page size matches the size of the current PdfImportedPage.
The source pages aren't rotated.
There are no annotations, optional content groups (layers), and various other bits that aren't just represented in the page contents.
Some workarounds:
// keep the page size consistent
PdfImportedPage page = writer.getImportedPage(reader, pageNum);
doc.newPage(page.getBoundingBox());
PdfContentByte pageContent = writer.getDirectContent();
pageContent.addTemplate(...);
// to compensate for a page's rotation, you need to either rotate the target page
// Easy in PdfStamper, virtually impossible with `Document` / `PdfWriter`.
AffineTransform unRotate = AffineTranform.getRotateInstance(degToRad(360 - pageRotation), pageCenterX, pageCenterY)
AffineTransform flip = new AffineTransform(1f, 0f, 0f, -1f, page.getWidth(), 0f);
AffineTransform finalTrans = flip;
finalTrans.concatenate(unRotate);
pageContent.addTemplate(page, finalTrans);
FAIR WARNING: My 2d matrix-fu isn't all that strong. I'm almost certainly doing something wrong. Debugging these sorts of things is a real PITA. Stuff either "looks right" or is so badly screwed up its off the page entirely (ergo invisible, so you don't know which way it went). I often change the page rectangles by [-1000 -1000 1000 1000] just so I can see where it all went. Fun stuff.
As for copying annotations and such... ouch. PdfCopy does all that for you, via it's addPage() method, but that doesn't let you transform the page content first. Any changes you make to the PdfImportedPage are ignored. You're really stuck with The Hard Way... manually copying all the fiddly bits and changing them to compensate for your flipped page... or messing with the source to addPage() to get the results you want. Both require some in-depth knowledge of PDF.
Given the specifics, you probably don't need to worry about it, but it's worth mentioning in case someone with a different situation comes along with the same goal.
Like the title says i'd like to read an existing pdf page size with VB.Net. I've been working with Itext.Sharp, and the Acrobat.dll. Is this possible??
There are a number of different "Boxes" a given page can have:
Media Box (required): The initial page size when printing viewing.
Crop Box (optional): Supersedes the media box. Defaults to match the media box. Must be a subset or match the media box.
There's also art/trim/bleed boxes, but they don't matter as much and are much less common.
So, the page size:
PdfReader reader = new PdfReader(myPath);
// gets the MEDIA BOX
Rectangle pageRect = reader.getPageSize(1); // 1 -> first page
// gets the crop box if present, or the media box if not.
Rectangle cropRect = reader.getCropBox(1);
// and finally
Rectangle artBox = reader.getBoxSize( 1, "art");
// could be "art", "bleed", "crop", "media", or "trim"
I'd go with getCropBox().
I also recommend checking out the JavaDoc for things like this. At the very least you would have come up with getPageSize() on your own. No, it's not C#. Yes, it's very useful.
http://api.itextpdf.com/
Also note that these Rectangles need not be based on 0,0 (which would be the lower left corner on an unrotated page).
Further, you should check the page's rotation, getPageRotation(int), and swap height and width if the rotation is 90 or 270. There is getPageSizeWithRotation(int), but it only works with the media box, so I'd do it yourself if I were you. It's only a few extra lines of code:
// rotation has to be 0, 90, 180, or 270. "360" isn't kosher IIRC.
if (reader.getPageRotation(pageNum) % 180 != 0) {
float tmp = width;
width = height;
height = tmp;
}