MeasureString error

[carlos-FG]

When obtaining the height of a text using MeasureString and using it as the height for an XTextFormatter with multiple lines of text, the last line does not appear. Comparing with version 1.3 of PDFsharp, I found that the measurement returned by version 6 is smaller.

XFont font = new XFont("Arial", 20, XFontStyleEx.Regular);
XTextFormatter tx = new XTextFormatter(gfx);
double textHeight = gfx.MeasureString("hello", font).Height;
// two-line text
string text = "hello\nworld";
// 2 lines height
textHeight *=2;
tx.DrawString(text, font, XBrushes.Black, new XRect(200, 200, 50, textHeight), XStringFormats.TopLeft);

[ThomasHoevel]

Cannot replicate. Consider using the IssueSubmissionTemplate to allow us to replicate the issue.

XTextFormatter uses font.GetHeight() internally. That gives me the same value I also get from MeasureString.

Maybe you have to make the rectangle larger to account for rounding errors, because 5 * x may give a different value than x + x + x + x + x.

My code above draws both lines of text.

[carlos-FG]

I tested using the IssueSubmissionTemplate and was able to reproduce the issue when FailsafeFontResolver isn’t used. Since I’m working on a web server, this functionality isn’t available. I can use font.GetHeight(), which returns the correct measurement. Thank you for your insights. De: ThomasHoevel ***@***.***> Enviado el: miércoles, 30 de octubre de 2024 8:41 Para: empira/PDFsharp ***@***.***> CC: carlos-FG ***@***.***>; Author ***@***.***> Asunto: Re: [empira/PDFsharp] MeasureString error (Issue #198) Cannot replicate. Consider using the IssueSubmissionTemplate to allow us to replicate the issue. XTextFormatter uses font.GetHeight() internally. That gives me the same value I also get from MeasureString. image.png (view on web) <https://github.com/user-attachments/assets/362722d2-a356-47a4-9438-570c4368c536> Maybe you have to make the rectangle larger to account for rounding errors, because 5 * x may give a different value than x + x + x + x + x.

[ThomasHoevel]

I can confirm that font.GetHeight() sometimes return larger values than MeasureString.
GetHeight() is used by XTextFormatter and should be used to calculate the rectangle.