Annotations are not displaying when rotated and burned in document

#1 Posted : Friday, July 10, 2020 10:41:05 AM(UTC)

Abdul Rahman

Groups: Registered
Posts: 60

I have a PDF document and Web Annotations XML file. I'm burning that XML to the PDF file and saving that using raster codecs. This is working fine. However If I rotate the PDF file by 90 degree and rotate the annotation container by 90 degree and burn XML file to PDF. It is not getting rendered. Here is the code I used.

Code:


using RasterCodecs rotcodecs = new RasterCodecs();
rotcodecs.Options.Load.Name = $"anything.pdf";
var rotoriginalImage = rotcodecs.Load(files[0]);
var rotinfo = rotcodecs.GetInformation(files[0], true);

RasterImage rotfullFileImage = null;

var rotannCodecs = new AnnCodecs();
var rotannContainer = new AnnContainer();
var renderingEngine = new AnnDrawRenderingEngine();
for (int j = 1; j <= rotoriginalImage.PageCount; j++)
{
    RasterImage image = rotcodecs.Load(files[0], rotinfo.BitsPerPixel, CodecsLoadByteOrder.BgrOrGrayOrRomm, j, j);
    rotannContainer = rotannCodecs.Load(annotationFile, j);

    if (rotfullFileImage is null)
    {
        rotfullFileImage = rotannContainer is null ? image : renderingEngine.RenderOnImage(rotannContainer, image);
    }
    else
    {
        rotfullFileImage.AddPage(rotannContainer is null ? image : renderingEngine.RenderOnImage(rotannContainer, image));
    }
}

rotcodecs.Save(rotfullFileImage ?? rotoriginalImage, @$"{currentPath}\Image To Pdf\beforerotate.pdf", RasterImageFormat.RasPdfLzw, 0, 1, rotoriginalImage.PageCount, 1, CodecsSavePageMode.Append);

rotfullFileImage = null;

for (int j = 1; j <= rotoriginalImage.PageCount; j++)
{
    RasterImage image = rotcodecs.Load(files[0], rotinfo.BitsPerPixel, CodecsLoadByteOrder.BgrOrGrayOrRomm, j, j);

    // Rotate the image by 90 degrees 
    RotateCommand lowcommand = new RotateCommand();
    lowcommand.Angle = 90 * 100;
    lowcommand.FillColor = new RasterColor(255, 255, 255);
    lowcommand.Flags = RotateCommandFlags.Resize | RotateCommandFlags.Bicubic;
    lowcommand.Run(image);

    if (rotfullFileImage is null)
    {
        rotfullFileImage = image;
    }
    else
    {
        rotfullFileImage.AddPage(image);
    }
}

rotcodecs.Save(rotfullFileImage ?? rotoriginalImage, @$"{currentPath}\Image To Pdf\afterrotate.pdf", RasterImageFormat.RasPdfLzw, 0, 1, rotoriginalImage.PageCount, 1, CodecsSavePageMode.Append);

rotannContainer.Rotate(90);
rotannCodecs.Save(@$"{currentPath}\Image To Pdf\4-42-90.xml", rotannContainer, AnnFormat.Annotations, 1);

rotfullFileImage = null;

for (int j = 1; j <= rotoriginalImage.PageCount; j++)
{
    RasterImage image = rotcodecs.Load(@$"{currentPath}\Image To Pdf\afterrotate.pdf", rotinfo.BitsPerPixel, CodecsLoadByteOrder.BgrOrGrayOrRomm, j, j);
    rotannContainer = rotannCodecs.Load(@$"{currentPath}\Image To Pdf\4-42-90.xml", j);

    if (rotfullFileImage is null)
    {
        rotfullFileImage = rotannContainer is null ? image : renderingEngine.RenderOnImage(rotannContainer, image);
    }
    else
    {
        rotfullFileImage.AddPage(rotannContainer is null ? image : renderingEngine.RenderOnImage(rotannContainer, image));
    }
}

rotcodecs.Save(rotfullFileImage ?? rotoriginalImage, @$"{currentPath}\Image To Pdf\afterrotatewithann.pdf", RasterImageFormat.RasPdfLzw, 0, 1, rotoriginalImage.PageCount, 1, CodecsSavePageMode.Append);

Note that I have done that in three steps in this example. Since my web app process it in three steps.

1. Document will be loaded in viewer with annotations xml.
2. Document rotate will be triggered in viewer and server will rotate the document and also annotations by given angle. And both will be stored separately.
3. Now if the rotated document is loaded in viewer with rotated annotation, it is loading in viewer.
4. Now I'm printing the document with annotation. Server will burn the rotated annotation with rotated document. Here annotation is not shown position is mismatched.

Please assist on what I'm doing wrong.

File Attachment(s):

4-42.txt (5kb) downloaded 14 time(s).

#2 Posted : Friday, July 10, 2020 12:40:29 PM(UTC)

Abdul Rahman

Groups: Registered
Posts: 60

I figured out the issue. It got resolved after adding the below code:

Code:


var height = image.ImageHeight * (720 / (double)image.YResolution);
var width = image.ImageWidth * (720 / (double)image.XResolution);
annContainer.Size = new LeadSizeD(width, height);
annContainer.Mapper.MapResolutions(image.XResolution, image.YResolution, image.XResolution, image.YResolution);


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Annotations are not displaying when rotated and burned in document