DrawHTMLTextBox and text height

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   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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Jan Members Profile Find Members Posts Beginner Joined: 24 May 10 Location: Czech Republic Status: Offline Points: 14	Post Options Post Reply Quote Jan Report Post Thanks(0) Quote Reply Topic: DrawHTMLTextBox and text height 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

Jan Members Profile Find Members Posts Beginner Joined: 24 May 10 Location: Czech Republic Status: Offline Points: 14	Post Options Post Reply Quote Jan Report Post Thanks(0) Quote Reply 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);