PDFTron WebViewer HTML5

Class: Stamper

PDFNet. Stamper

new Stamper()

Stamper is a utility class that can be used to stamp PDF pages with text, images, or vector art (including another PDF page) in only a few lines of code.

Although Stamper is very simple to use compared to ElementBuilder/ElementWriter it is not as powerful or flexible. In case you need full control over PDF creation use ElementBuilder/ElementWriter to add new content to existing PDF pages as shown in the ElementBuilder sample project.

Methods

<static> create(size_type, a, b)

Stamper constructor

Parameters:
Name Type Description
size_type number/enum 
PDFNet.Stamper.SizeType = {
	e_relative_scale : 1
	e_absolute_size : 2
	e_font_size : 3
}

Specifies how the stamp will be sized -e_relative_scale: Stamp size is relative to the size of the crop box of the destination page. 'a' is a percentage of the width of the crop box (e.g.: 0.5 is 50% of the width of the crop box) 'b' is a percentage of the height of the crop box. If 'a' <= 0 then only b will be used. If 'b' <= 0 then only 'a' will be used.

	-e_absolute_scale: Stamp size is explicitly set. 'a' sets the width of
	of the stamp's bounding box. 'b' sets the height of the stamp's bounding
	box. The width and height are constant, regardless of the size of the 
	destination page's bounding box. 

	-e_font_size: This type only applies to text stamps. 'a' sets the font
	size. 'b' is ignored.
a number

@see size_type
b number

@see size_type
Returns:

A promise that resolves to an object of type: "Stamper"

Type
PDFNet.Stamper

<static> deleteStamps(doc, page_set)

Deletes PDFTron stamps from document at given page numbers

Parameters:
Name Type Description
doc PDFNet.PDFDoc

The document to delete stamps from
page_set PDFNet.PageSet

The set of pages to delete stamps from

<static> hasStamps(doc, page_set)

Returns true if the given set of pages has at least one stamp

Parameters:
Name Type Description
doc PDFNet.PDFDoc

The document that's being checked
page_set PDFNet.PageSet

The set of page that's being checked
Returns:

A promise that resolves to an unknown type

destroy()

Frees the native memory of the object.

setAlignment(horizontal_alignment, vertical_alignment)

Sets the alignment for the x and y variables.

Parameters:
Name Type Description
horizontal_alignment number/enum 
PDFNet.Stamper.HorizontalAlignment = {
	e_horizontal_left : -1
	e_horizontal_center : 0
	e_horizontal_right : 1
}

Can be set to e_left, e_center or e_right e_left: horizontal_distance measures the distance between the left edge of the stamp's bounding box and the left edge of the crop box e_center: horizontal_distance measures the distance between the horizontal bisector of the stamp's bounding box and the horizontal bisector of the crop box e_right: horizontal_distance measures the distance between the right edge of the stamp's bounding box and the right edge of the crop box
vertical_alignment number/enum 
PDFNet.Stamper.VerticalAlignment = {
	e_vertical_bottom : -1
	e_vertical_center : 0
	e_vertical_top : 1
}

Can be set to e_top, e_center or e_bottom e_bottom: vertical_distance measures the distance between the bottom edge of the stamp's bounding box and the bottom edge of the crop box e_center: vertical_distance measures the distance between the vertical bisector of the stamp's bounding box and the vertical bisector of the crop box e_top: vertical_distance measures the distance between the top edge of the stamp's bounding box and the top edge of the crop box
See:
  • SetPosition

setAsAnnotation(annotation)

Specifies if the stamp is to be stamped as an annotation.

Parameters:
Name Type Description
annotation boolean

A flag specifying if the stamp should be added as an annotation or not

setAsBackground(background)

Specifies if the stamp is to be stamped in the background or the foreground.

Parameters:
Name Type Description
background boolean

A flag specifying if the stamp should be added as a background layer to the destination page

setFont(font)

Defines the font of the stamp. (This only applies to text-based stamps)

Parameters:
Name Type Description
font PDFNet.Font

The font of the text stamp

setFontColor(font_color)

Sets the font color (This only effects text-based stamps)

Parameters:
Name Type Description
font_color PDFNet.colorpt

The color of the font

setOpacity(opacity)

Sets the opacity value for the stamp

Parameters:
Name Type Description
opacity number

The opacity value of the stamp

setPosition(x, y, use_percentage)

Parameters:
Name Type Description
x number
y number
use_percentage boolean

setRotation(rotation)

Rotates the stamp by the given number of degrees

Parameters:
Name Type Description
rotation number

Rotation in degrees

setSize(size_type, a, b)

Parameters:
Name Type Description
size_type number/enum 
PDFNet.Stamper.SizeType = {
	e_relative_scale : 1
	e_absolute_size : 2
	e_font_size : 3
}
a number
b number

setTextAlignment(text_alignment)

Sets the text alignment (note: this only applies to text watermarks)

Parameters:
Name Type Description
text_alignment number/enum 
PDFNet.Stamper.TextAlignment = {
	e_align_left : -1
	e_align_center : 0
	e_align_right : 1
}

Enumerator for text alignment (e_left, e_center, e_right)

showsOnPrint(on_print)

Parameters:
Name Type Description
on_print boolean

Specifies if the watermark will be displayed when printed

showsOnScreen(on_screen)

Parameters:
Name Type Description
on_screen boolean

Specifies if the watermark will be displayed on screen

stampImage(dest_doc, img, dest_pages)

Stamps an image to the given destination document at the set of page numbers

Parameters:
Name Type Description
dest_doc PDFNet.PDFDoc

The document being stamped
img PDFNet.Image

The image that is being stamped to the document
dest_pages PDFNet.PageSet

The set of pages in the document being stamped

stampPage(dest_doc, page, dest_pages)

Stamps a PDF page to the given destination document at the set of page numbers

Parameters:
Name Type Description
dest_doc PDFNet.PDFDoc

The document being stamped
page PDFNet.Page

The page that is being stamped to the document
dest_pages PDFNet.PageSet

The set of pages in the document being stamped

stampText(dest_doc, txt, dest_pages)

Stamps text to the given destination document at the set of page numbers

Parameters:
Name Type Description
dest_doc PDFNet.PDFDoc

The document being stamped
txt string

The image that is being stamped to the document
dest_pages PDFNet.PageSet

The set of pages in the document being stamped