Silpa- The Indian Language Computing project

Script Renderer

This is an experimental online service based on PyPDFLib library in development. This library projects objective is to develop an opensource pdf rendering library which can support all complex scripts. It is in development and this service is not bug-free now.

Generate PDF of a wiki page

Convert Text to Image

Module Information

This module uses pango cairo python apis for rendering. To get this running , you should have python bindings of pango and cairo installed in your system. For PDF generation, the module uses PyPDFLib library. This module is in development and APIs are not stable or final.

Bugs? Suggestions? Let us know!

If you see any bug in this application or you have any suggestion for improvement, just mail to pypdflib-dev@nongnu.org with details. You can also report the bug at PyPDFLib bug tracker

Python API

You can use Silpa python APIs to renedr a custom text to any image format or PDF. After installing silpa, refer the following example for using the api. The text can be in any script, including Right to Left scripts.

        from silpa.modules import render
        render=render.getInstance()
        #Render the text to SVG format. width=100, height= 200 pixels
        render.render_text("Your text goes here", "svg", 100,200)
        #Render the text to png format. width=100, height will be automatcally set based the content size
        render.render_text("Your text goes here", "png", 100 ,0)
        # Render the text to a PDF
        render.render_text("Your text goes here", "pdf", 500 , 500)

The render_text method return the name of the generated image.(TODO: Make the path of the image configurable)

Python JSON RPC

You will require JSON RPC client from here: http://json-rpc.org/wiki/python-json-rpc

        from jsonrpc import ServiceProxy
        proxy = ServiceProxy("http://localhost/silpa/JSONRPC")
        print s.modules.Render.render_text("Your text goes here", "svg", 100,200)

PHP JSON RPC

A sample PHP client to use the Silpa's JSON RPC service is given below.

        
        define ('HOSTNAME', 'http://silpa.smc.org.in/JSONRPC');
        $url = HOSTNAME;
        // Open the Curl session
        $session = curl_init($url);
        // If it's a POST, put the POST data in the body
        $postvars = '{"method": "modules.Render.render_text", "params": ["Your text goes here", "png", 100,100], "id":"jsonrpc"}';
        curl_setopt ($session, CURLOPT_POST, true);
        curl_setopt ($session, CURLOPT_POSTFIELDS, $postvars);
        // Don't return HTTP headers. Do return the contents of the call
        curl_setopt($session, CURLOPT_HEADER, false);
        curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
        // Make the call
        $json = curl_exec($session);
        // The web service returns json. Set the Content-Type appropriately
        header("Content-Type: application/json");
        echo $json;
        $obj =  json_decode($json,false);
        $result  =  $obj->{"result"};
        echo $result;
        curl_close($session);

The result will contain the image name. the image can be accessed by http://silpa.smc.org.in/Render?image=abcd.png

Wiki to PDF

The wiki2pdf method is accessible by the following JSON:


                    $postvars = '{"method": "modules.Render.wiki2pdf", "params": ["http://en.wikipedia.org/wiki/Kerala"], "id":"jsonrpc"}';

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