c# - iTextSharp ShowTextAligned Anchor Point -

i'm adding text pdf using itextsharp's showtextaligned method. method looks (c#):

public void showtextaligned(     int alignment,     string text,     float x,     float y,     float rotation ) 

however, unclear anchor point text we're making. provide x , y, these correspond upper left corner of text rectangle, lower left corner, or else? impacted line spacing?

i looked @ documentation @ website, isn't explanatory. see pdfcontentbyte class / pdfcontentbyte methods / showtextaligned method.

obviously anchor point depends on kind of alignment. not make sense right-align if anchor point @ left side of text.

furthermore, text operations align relative baseline.

thus:

• for left aligned text anchor point left-most point of text baseline.
• for center aligned text anchor point middle point of text baseline.
• for right aligned text anchor point right-most point of text baseline.

more visually:

this has been generated using:

[test] public void showanchorpoints() {     directory.createdirectory(@"c:\temp\test-results\content\");     string dest = @"c:\temp\test-results\content\showanchorpoints.pdf";      using (document document = new document())     {         pdfwriter writer = pdfwriter.getinstance(document, new filestream(dest, filemode.create, fileaccess.write));         document.open();          pdfcontentbyte canvas = writer.directcontent;          canvas.moveto(300, 100);         canvas.lineto(300, 700);         canvas.moveto(100, 300);         canvas.lineto(500, 300);         canvas.moveto(100, 400);         canvas.lineto(500, 400);         canvas.moveto(100, 500);         canvas.lineto(500, 500);         canvas.stroke();          columntext.showtextaligned(canvas, element.align_left, new phrase("left aligned"), 300, 500, 0);         columntext.showtextaligned(canvas, element.align_center, new phrase("center aligned"), 300, 400, 0);         columntext.showtextaligned(canvas, element.align_right, new phrase("right aligned"), 300, 300, 0);     } }