python add persian text to image

[vahid chakoshy]

hi, how can i add persian text to image with python?

[Saeed Rasooli]

Since PIL (Python Imaging Library) does not support BIDI, you need an extra (third-party) library with BIDI support, like Cairo which is underlying library of GTK+, or choose Qt (base of KDE).
Cairo's binding is part of PyGTK

On Tue, Dec 25, 2012 at 7:53 PM, vahid chakoshy <vcha...@gmail.com> wrote:

hi, how can i add persian text to image with python?

--
http://persian-computing.org/
http://groups.google.com/group/persian-computing/

[Saeed Rasooli]

Unfortunately, the whole gtk/cairo/pango thing and the relation between them is a little complicated, but I wrote a sample code to draw a persian text over a new image file (with one line change, you can put it on an existing image file)

__________________________

#!/usr/bin/python2.7

# -*- coding: utf-8 -*-

import gtk

from gtk import gdk

import pango

pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, False, 8, 300, 200)

#pixbuf = gtk.gdk.pixbuf_new_from_file("image.png")

pixmap, mask = pixbuf.render_pixmap_and_mask()

#pixmap.draw_rectangle(pixmap.new_gc(), True, x, y, w, h)

cr = gdk.pango_context_get()

text_layout = pango.Layout(cr)

text_layout.set_text(u'امتحان')

text_layout.set_font_description(pango.FontDescription('Sans Bold 40'))

pixmap.draw_layout(pixmap.new_gc(), 50, 50, text_layout, foreground=gdk.Color('white'))

pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0, 300, 200)

pixbuf.save('fa.png', 'png')

[Behdad Esfahbod]

You don't really need gdk except for loading/saving non-PNG formats. Here's
minimal pypangocairo code for example:

http://marc.info/?l=cairo&m=121692252128947

behdad

--
behdad
http://behdad.org/

[Saeed Rasooli]

Thanks Behdad, I almost forgot about ImageSurface

I personally prefer the pangocairo one because pango Layout is much more flexible, for example we can analyze the text layout (to adjust font size and position...) before we draw it.