[Mono-bugs] [Bug 556181] New: Wrong Dpi values when created Graphic instance with Graphic.FromImage()

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Nov 17 11:11:42 EST 2009


           Summary: Wrong Dpi values when created Graphic instance with
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: Other
        OS/Version: openSUSE 11.1
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Sys.Drawing.
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: ypupo2002 at live.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---

Created an attachment (id=327941)
 --> (http://bugzilla.novell.com/attachment.cgi?id=327941)
Minimal program to reproduce the bug

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:
Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)

After create an Image instance (new Image(100, 100)), and setting image
to certain dpis (different to 96), if and instance of Graphics is created based
con that Image instance (Graphic.FromImage(instance)), the Graphics instance
return wrong dpi value (instead of taking dpi from Image instance is defaulting
to 96)

Reproducible: Always

Steps to Reproduce:
1. Create an Instance of Image with img = new Image(100, 100)
2. Set the resolution to a value different to 96 (img.SetResolution(100, 100))
3. Create an instance of a Graphic with gr = Graphic.FromImage(img);
4. Verify that gr.DpiX and gr.DpiY are different to img.HorizontalResolution
and img.VerticalResolution respectively.
Actual Results:  
Wrong dpi value for the Graphic object (not equal to the resolution of the
Image object)

Expected Results:  
Same value of the Dpi for the Graphic object and the Image object

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