[Mono-bugs] [Bug 606204] New: Graphics.DrawString alignment inconsistent with .NET (and Expectation)

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Sat May 15 14:41:38 EDT 2010



           Summary: Graphics.DrawString alignment inconsistent with .NET
                    (and Expectation)
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Sys.Drawing.
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: eugen at drnet.at
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---

Created an attachment (id=362469)
 --> (http://bugzilla.novell.com/attachment.cgi?id=362469)
C# Source code as mentioned

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/533.4
(KHTML, like Gecko) Chrome/5.0.375.29 Safari/533.4

When using Stringformat.Alignment and Stringformat.LineAlignment to draw a
string to a bitmap, the position of the drawed text ist not as expected and as
in .NET.

Additionally, positioning differs heavily between horizontal and vertical

Reproducible: Always

Steps to Reproduce:
1. Install same TTF font on Linux/Mono and Windows/.NET (I chose "Linux
Libertine", but you can use any font you like)

2. Use the attached MonoDevelop Project and C# code to create FontBug.exe -
this is a small program, that draws text to a bitmap and then saves the bitmap
as PNG

3. Run FontBug.exe on Linux/Mono and Windows/.NET, compare output
Output from Ubuntu 10.4/Mono 2.4.4 and Windows XP .NET 2.0 are attached
Actual Results:  
Positioning of text differs between the two

Expected Results:  
Bitmaps are identical

I suspect, that this poses a severe restriction on the usability of Mono for

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