Debenu Quick PDF Library - PDF SDK Community Forum : DrawHTMLTextBox and text height http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 19:57:16 +0000 Mon, 19 Mar 2012 12:26:37 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2190 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[DrawHTMLTextBox and text height : I found, that value returned by...]]> http://www.quickpdf.org/forum/drawhtmltextbox-and-text-height_topic2190_post9342.html#9342 Author: Jan
Subject: 2190
Posted: 19 Mar 12 at 12:26PM

I found, that value returned by GetHTMLTextHeight depends on value spacing parameter HTML text. Same single-line HTML text, same font, different spacing and different text height:
 
 
int iFontID = qp.AddTrueTypeFont("Times New Roman", 0);
qp.SetHTMLNormalFont("Times New Roman", iFontID);
string  textHTML = "<p spacing=\"-2pt\" align=\"left\"><font size=\"11pt\">Test text test text</font></p>";
qp.DrawHTMLTextBox(10, 350, 300, 200, textHTML);
double height = qp.GetHTMLTextHeight(300, textHTML);
textHTML = "<p spacing=\"2pt\" align=\"left\"><font size=\"11pt\">Test text test text</font></p>";
qp.DrawHTMLTextBox(10, 400, 300, 200, textHTML);
height = qp.GetHTMLTextHeight(300, textHTML);
]]> Mon, 19 Mar 2012 12:26:37 +0000 http://www.quickpdf.org/forum/drawhtmltextbox-and-text-height_topic2190_post9342.html#9342 <![CDATA[DrawHTMLTextBox and text height : Hi, I have a file in XSL-FO format...]]> http://www.quickpdf.org/forum/drawhtmltextbox-and-text-height_topic2190_post9328.html#9328 Author: Jan
Subject: 2190
Posted: 14 Mar 12 at 9:10AM

Hi, I have a file in XSL-FO format and I want convert it into PDF.
And I have problem with difference of text height calculated at drawing/printing via C#
and at insert in PDF file.
In both environment I use 'pt' units.

Example XSL-FO:
<fo:block line-height="14.399999999999999pt" top="11.0pt" left="41.0pt" height="15.0pt" width="434.0pt" font-family="Times New Roman" font-size="12.0pt">Test text, test text, test text .... </fo:block>

Inserting into PDF:

pdf.SetMeasurementUnits(0);     // 0 = 1/72 inch "per unit"
pdf.SetOrigin(1);

int idFont = pdf.AddTrueTypeFont("Times New Roman", 0);
pdf.SetHTMLNormalFont("Times New Roman", idFont);

string textHTML = "<p><font size=\"12pt\">Test text, test text, test text .... </font></p>";
pdf.DrawHTMLTextBox(10, 10, 434, 15, textHTML);

int _height = pdf.GetHTMLTextHeight(434, textHTML);

Height of text at C# drawing/printing is lower than 15 pt,
at inserting into PDF (variable _height) is higher than 15 pt (15,768 exactly).

Difference in this case is about 6%.
Solution may be reduce font size at PDF creating by 6% and round down to integer,
but I do not consider this the best solution.

Can you help me?
Thanks 

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