Can i get fixed PDF page co-ordinates (Bottom-left point ) irrespective of Pdf page rotation?

[Manoj]

Product:PdfTron Android SDK

Product Version: Demo

Please give a brief summary of your issue:Can i get fixed PDF page co-ordinates (Bottom-left point ) irrespective of Pdf page rotation?
(Think of this as an email subject)

I want to convert my old app pdf support lib to PDFTron lib.
But, i am having few issues like ,
In my old app, un-saved custom annotations rendering in pdf w.r.t pdf page co-ordinate( Bottom-left corner point) irrespective to pdf page rotation. I tried to render same annotations using PDFTron but the reference points are different as per PDF rotation. So I would like to know, Is there any way to get pdf page co-ordinate i.e. bottom-left point always in-depending on page rotation?

Please describe your issue and provide steps to reproduce it:
(The more descriptive your answer, the faster we are able to help you)

Please provide a link to a minimal sample where the issue is reproducible:

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• Customize annotation style editor in Android - Customize the annotation preset styles - Attribute presets table
• Flatten a PDF in Android - About PDF flattener (or mobile PDF optimizer)
• Code samples to create / generate PDFs in Android
• Redact - About redactor

APIs:

• Convert.XPSOutputOptions - equals
• Convert.XPSOutputCommonOptions - XPSOutputCommonOptions
• Convert.SVGOutputOptions - notify

Forums:

• How to disable “longPressQuickMenu” if someone want to use PDFViewCtrl to view the Pdf?
• How can i config using ViewerConfig when i use PDFViewCtrl to view PDF in my App?
• Loosing created annotation on orientation change

[Support71032890]

Hi Manoj,

Thanks for contacting us.
Could you describe more details about your use case? What are you looking for to do exactly?
We would like some sample code so that we can better understand what you are trying to do.

Best regards,
Saeed

[Ryan]

Most likely you are looking for the Page.GetDefaultMatrix API.

See this post for more info.

What is the purpose of the Page.GetDefaultMatrix() method?

Q: What is the purpose of the Page.GetDefaultMatrix() method? In the documents I have tested this with, the Default Matrix just appears to have some wacky h and v values in it, which would be imposing a translation to everything on the page. We currently are not even using this matrix, and our output is still valid. What is the purpose of this? ----------- A: PDF pages are cropped using page.GetCropBox(). This box defines an area in the PDF user coordinate system that represents a visibl…

You may also find this forum post useful, which shows how to go back and forth between PDF coordinates and image coordinates (where image origin is always top left corner).

How do I translate coordinates between a PDF page and its PDF2Image output

Question: We are generating 300DPI images of PDF’s using PDFDraw. How do we translate PDF coordinates to this new image? Answer: By default PDF pages are in 72 dpi, which is called user space in the PDF spec. However, PDF pages can be rotated, have off set crop boxes (which essentially move the origin), and, while extremely rare, custom user space scale. Also, PDF coordinate system is from the bottom left of the page, with y-axis going up, which might be the opposite your image coordinate sy…