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From Mostafa Mahdieh <m.mahd...@gmail.com>
Subject Re: Text rendering of some Persian characters has issues when converting SVG to PNG
Date Fri, 28 Jun 2013 18:21:22 GMT
Does anyone see my messages? Am I sending to the wrong group?


On Wed, Jun 26, 2013 at 11:53 PM, Mostafa Mahdieh <m.mahdieh@gmail.com>wrote:

> Any ideas?
>
>
> On Mon, Jun 24, 2013 at 5:33 PM, Mostafa Mahdieh <m.mahdieh@gmail.com>wrote:
>
>> Hi,
>>
>> 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
>> --
>> Mostafa Mahdieh
>>
>
>
>
> --
> Mostafa Mahdieh
>



-- 
Mostafa Mahdieh

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