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List:       batik-dev
Subject:    [jira] [Created] (BATIK-1053) Text rendering of some Persian characters has issues when converting S
From:       "Mostafa Mahdieh (JIRA)" <jira () apache ! org>
Date:       2013-07-30 10:35:48
Message-ID: JIRA.12660634.1375180481511.135617.1375180548532 () arcas
[Download RAW message or body]

Mostafa Mahdieh created BATIK-1053:
--------------------------------------

             Summary: Text rendering of some Persian characters has issues when \
converting SVG to PNG  Key: BATIK-1053
                 URL: https://issues.apache.org/jira/browse/BATIK-1053
             Project: Batik
          Issue Type: Bug
          Components: SVG Rasterizer
    Affects Versions: 1.7
         Environment: OS: Ubuntu Linux 12.04 (3.2.0-44-generic #69-Ubuntu SMP Thu May \
                16 17:35:01 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux)
Java: java version "1.7.0_21"
OpenJDK Runtime Environment (IcedTea 2.3.9) (7u21-2.3.9-0ubuntu0.12.04.1)
            Reporter: Mostafa Mahdieh


I am using Activiti Explorer 5.12.1, which uses batik transcoder 1.7 as a library. \
When exporting bpmn models to png using Activiti Explorer, the output has issues on \
characters "ی", "ک", "پ" and "گ". Note that theses characters are part of the \
Persian character set of utf-8, and other characters which are in the common set of \
Arabic and Persian character sets, don't seem to have any problems.

I have attached a sample of one of my tests. The text in the box should read

"ما کب گپ جیب جوب پا"

which is incorrectly shown as

"ما ک‌ب گ‌پ ج‌ی‌ب جوب پ‌ا"

I traced the problem in Activiti Explorer code to this small code snippet:

=======================
      InputStream svgStream = new \
ByteArrayInputStream(modelForm.getFirstValue("svg_xml").getBytes("utf-8"));  \
TranscoderInput input = new TranscoderInput(svgStream);  
      PNGTranscoder transcoder = new PNGTranscoder();
      // Setup output
      ByteArrayOutputStream outStream = new ByteArrayOutputStream();
      TranscoderOutput output = new TranscoderOutput(outStream);
      
      // Do the transformation
      transcoder.transcode(input, output);
      final byte[] result = outStream.toByteArray();
=======================

It seems that the issues are coming from the PNGTranscoder not being able to render \
persian text correctly. PNGTranscoder is part of Apache Batik \
(org.apache.batik.transcoder.image.PNGTranscoder).

I have also created a very small eclipse project which does the same thing, \
independent of any Activiti Explorer code, which helps a lot to debug the problem. \
The project is attached.

More details:

OS: Ubuntu Linux 12.04 (3.2.0-44-generic #69-Ubuntu SMP Thu May 16 17:35:01 UTC 2013 \
x86_64 x86_64 x86_64 GNU/Linux)

Java: java version "1.7.0_21"
OpenJDK Runtime Environment (IcedTea 2.3.9) (7u21-2.3.9-0ubuntu0.12.04.1)

Batik version used by Activiti Explorer (found in the MANIFEST.MF of the jar file \
included): 1.7+r608262

Regards

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