Add watermark to a PDF programmatically

void PDDocAddWatermarkFromText ()

This API adds a text-based watermark to a page range in the given document.

API syntax:

            void PDDocAddWatermarkFromText (

                    PDDoc pdDoc,
                    PDDocWatermarkTextParamsRec* pTextParams,
                    PDDocAddWatermarkParamsRec* pParams
                    );

Parameter details:

•  PdDoc is the document onto which the watermark will be added.
• TextParams is the structure describing the text-based watermark to be added.
• pParams is the structure specifying how the watermark should be added to the document.

void PDDocAddWatermarkFromPDPage ()

This API adds pdPage as a watermark to a page range in the document.

API syntax :

void PDDocAddWatermarkFromPDPage (
                    PDDoc pdDoc,
                    PDPage pdPage,
                    PDDocAddWatermarkParamsRec* pParams
            );

Parameter details:

•  pdDoc is the document onto which the watermark will be added.
• pdPage is the page to be added as a watermark.
• pParams is the structure specifying how the watermark should be added to the document.

addWatermarkFromText()

This API adds the given text as a watermark to the specified pages in the document. For example, the code below adds “Confidential” as a watermark to the center of all pages of the current document.

this.addWatermarkFromText(“Confidential”, 0, font.Helv, 24, color.red);

addWatermarkFromFile()

This API adds a page as a watermark to the specified pages in the document. For example, the following code adds the first page of 'watermark.pdf' as a watermark to the center of all pages of the current document.

this.addWatermarkFromFile(“/C/temp/watermark.pdf”);

For a detailed explanation of all parameters, view the API References available within the documentation folder of the Acrobat SDK.