I have a question regarding the rotation of PdfImage

[sweetbook]

I'm trying to use DrawImage in the PDF library, 

and when I use the rotation function in the code below, 

the rotation location does not appear in x, y coordinates. 

Please look at the code below and let me know how to solve this problem.

// Code

PdfDocument pdoc = new PdfDocument(); 

...

PdfPage page = pdoc.Pages.Add();

PdfPageLayer lay = page.Layers.Add();

PdfImage pimg = PdfImage.FromFile(@"D:\test.jpg");

lay.Graphics.TranslateTransform(pimg.Width / 2, pimg.Height / 2);

lay.Graphics.RotateTransform(-27);

lay.Graphics.DrawImage(pimg, x, y, pimg.Width, pimg.Height); // x, y are Image File Location Coordinates

// -- end

// used Library DLL (Version : 18.3400.0.35)

Syncfusion.Compression.Base.dll

Syncfusion.Pdf.Base.dll

[Gowthamraj Kumar]

Hi sweetbook,  

 

Thank you for contacting Syncfusion products. 

 

We have the checked the reported image position issue with the provided code and we can able to reproduce the issue. Actually this is not an issue in PDF library, it can be resolved in sample level. We need to mention the location in translatetransform(location.x,location.y) and the angle in rotatetransform(angle) and there is no need to mention the location in DrawImage(). We can just set the 0,0 as location and draw the image. 

 

Please refer below code snippet to resolve that issue. 

 

PdfDocument pdoc = new PdfDocument();  

PdfPage page = pdoc.Pages.Add(); 

PdfPageLayer lay = page.Layers.Add();             

PdfImage pimg = PdfImage.FromFile("logo.jpg");             

//Translate the coordinate system’s to where you want draw the text position 

lay.Graphics.TranslateTransform(100,100); 

//Rotate the coordinate system’s 

lay.Graphics.RotateTransform(-27); 

//set 0,0 as location to draw the image in rotated position 

lay.Graphics.DrawImage(pimg,0,0,pimg.Width,pimg.Height); 

pdoc.Save("output.pdf");          

pdoc.Close(); 

 

Please let us know if you need any further assistance with this. 

Regards, 

Gowthamraj K 

[sweetbook]

Hello, I checked the comments. 

I tested it before using the method you told me, 

but I couldn't figure out the cause. 

So, I downloaded the sample code source from the link below and tested it by modifying it a little bit.

https://www.syncfusion.com/kb/11635/how-to-rotate-an-image-around-its-center-in-pdf-document-using-c

(The modified code is attached as a zip.) 

When you run a built app, 

a PDF is created in the bin\Debug folder with result.pdf. 

The first page of the result.pdf created is the page before the Rotate operation. 

Page 2 is the page after the Rotate operation. 

The image position is rapidly changing, and in this case, how do I change the code? 

I'd like you to let me know in detail.

Attachment: ImageToPDFSample_4d81cefe.zip

[Gowthamraj Kumar]

Hi sweetbook,   

 

As we said earlier, we need to mention the location of the image in translatetransform(location.x,location.y) and the angle in rotatetransform(angle). We have modified the provided sample with proper translateTransform(), now its added properly. Kindly please try the below sample in your end and let us know the result. 

 

Sample: https://www.syncfusion.com/downloads/support/forum/161157/ze/ImageToPDFSample186855702  

Document: https://www.syncfusion.com/downloads/support/forum/161157/pd/resultpage443483632  

 

Please let us know if you need any further assistance with this. 

 

Regards, 

Gowthamraj K 

[sweetbook]

Thank you for your comments and Source Code. 

As I checked, it appears that the PdfPageLayer is rotating while keeping the size of the PdfPage. 

What I want to do is to run Rotate on the center of the image on the first page, 

based on the blue circle.

I'm sorry for asking so many questions. 

It's because this problem is a challenge for us.

Attachment: result_be3a9674.zip

[Gowthamraj Kumar]

Hi Sweetbook, 

 

Thank you for your update. 

 

We have modified the sample for achieving your requirement in our end and please find the modified sample from below link, 

Sample: https://www.syncfusion.com/downloads/support/forum/161157/ze/ImageToPDFSample_Mod1956716640 

Output: https://www.syncfusion.com/downloads/support/forum/161157/pd/resultpage_center1474763770  

 

Please let us know if you need further assistance on this. 

 

Regards, 

Gowthamraj K