How can I render hindi correctly when exporting to pdf?

问题

I am using i-report 5.5.0 for jasper reports. I need to export Hindi text into PDF format, but Hindi part is getting converted to ???????.

I have already used font extension but it didn't helped:

font name: "lohit Devanagari"
PDF embedded: checked
PDF encoding:Identity-H

I have also tried other Hindi fonts but nothing worked so far..

<textField>
    <reportElement x="111" y="26" width="100" height="20" uuid="5a471a16-de7b-4f55-9c9f-b01d37938b9f"/>
     <textElement>
        <font fontName="Lohit Devanagari" pdfEncoding="Identity-H" isPdfEmbedded="false"/>
    </textElement>
    <textFieldExpression><![CDATA[$F{DISTRICT_NAME}]]></textFieldExpression>
</textField>

回答1:

The correct way to go is using font-extensions. pdfEncoding="Identity-H" is deprecated.

First clear this checklist to render font in pdf:

Is my actual .tff supported (OpenType) and can the font actually render the character. Not all fonts render all characters in UTF-8

Once you have created correctly font extension and its not working this is probably your problem..

Do I pass correct encoding to iText. In doubts (or in general) use the encoding Identity-H this is recommend for newer PDF standards and gives you the ability to mix different encoding.

Identity-H seems ok

Is my font embedded so that if I share the pdf also computers not having this font can display the content.

Embed your font (otherwise if you make it work on your computer it may not work on others), note in your jrxml is isPdfEmbedded=false, remove tag and in font-extension select true or set tag to true.

Now just generate the font-extension correctly and add it to your classpath,

How to add font extensions

EDIT: After user passed font

The font Krutidev_011.TTF is not a valid ttf font it maybe because unfortunately the standard according to Apple and the standard according to Microsoft diverged (my guess your font is an apple ttf not an open type ttf).

Caused by: net.sf.jasperreports.engine.JRRuntimeException: java.awt.FontFormatException: java.nio.BufferUnderflowException
at net.sf.jasperreports.engine.fonts.SimpleFontFace.setTtf(SimpleFontFace.java:178)

I tried to download a valid ttf font Lohit Devanagari from the web and add it as font extension, fontName="Lohit Devanagari" this is my result:

It is rendering the fonts but the result may have Ligaturizer problem, for how to solve these see for example Why is the Gujarati-Indian text not rendered correctly using Arial Unicode MS?

If you like to try this is the font-extension I used font extension jar for Lohit Devanagari, remember to set fontName="Lohit Devanagari"

回答2:

I have same problem I solve it with gargi.ttf font. download here with this configuration

"gargi" => array(
        'R' => "gargi.ttf",
        'useOTL' => 0xFF,
    ),

回答3:

this worked for me

IndicLigaturizer  hindi = new DevanagariLigaturizer();
String result = hindi.process(string);

来源：https://stackoverflow.com/questions/34287186/how-can-i-render-hindi-correctly-when-exporting-to-pdf