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Posted to batik-dev@xmlgraphics.apache.org by bu...@apache.org on 2006/07/24 09:38:56 UTC

DO NOT REPLY [Bug 40098] New: - Incorrect scaling with -dpi

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           Summary: Incorrect scaling with -dpi
           Product: Batik
           Version: 2.0
          Platform: All
        OS/Version: Windows XP
            Status: NEW
          Severity: major
          Priority: P2
         Component: SVG Rasterizer
        AssignedTo: batik-dev@xmlgraphics.apache.org
        ReportedBy: silverbanana@gmx.de


Using the dpi option with batik rasterizer does not scale some things correctly,
especcialy filter settings. E.g. the blur filter will lead to different visual
results if used with different dpi settings while only a scaling should take place.

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DO NOT REPLY [Bug 40098] - Incorrect scaling with -dpi

Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
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<http://issues.apache.org/bugzilla/show_bug.cgi?id=40098>.
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deweese@apache.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID




------- Additional Comments From deweese@apache.org  2006-07-24 11:36 -------
The '-dpi' option adjust the mapping from 'real world' units 
to user space units.

So when dpi==100, 1 inch is treated as 100 user space units.
When dpi==200, 1 inch is treated as 200 user space units.

Most of the elements of your document use 'real world' units
however your filter specification (out of nessesity) uses
'user space' units for the stdDev of the gaussian blur.

This means that your filter doesn't scale with the rest
of your document.

If you want to define a 'scalable' document you need
to provide a viewBox that will be fit to the given
width and height (then just give the desired 
width/height on the command line).

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DO NOT REPLY [Bug 40098] - Incorrect scaling with -dpi

Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
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<http://issues.apache.org/bugzilla/show_bug.cgi?id=40098>.
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INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=40098





------- Additional Comments From silverbanana@gmx.de  2006-07-24 07:41 -------
Created an attachment (id=18631)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=18631&action=view)
An image which does not scale correctly when converted with dpi option

convert this image with:
java -jar batik-rasterizer.jar test.svg -m image/jpeg -d dpi200.jpg -q 0.99
-dpi 200
and with:
java -jar batik-rasterizer.jar test.svg -m image/jpeg -d dpi100.jpg -q 0.99
-dpi 100
to see the effect.

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