121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2000-2006 Donald N. Allingham
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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"""
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Image manipulation routines.
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"""
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#-------------------------------------------------------------------------
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#
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# Standard python modules
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#
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#-------------------------------------------------------------------------
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import os
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import tempfile
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#-------------------------------------------------------------------------
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#
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# GTK/Gnome modules
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#
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#-------------------------------------------------------------------------
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import gtk
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import gobject
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#-------------------------------------------------------------------------
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#
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# resize_to_jpeg
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#
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#-------------------------------------------------------------------------
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def resize_to_jpeg(source, destination, width, height):
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"""
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Creates the destination, derived from the source, resizing it to the
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specified size, while converting to JPEG.
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@param source: source image file, in any format that gtk recognizes
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@type source: unicode
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@param destination: destination image file, output written in jpeg format
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@type destination: unicode
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@param width: desired width of the destination image
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@type width: int
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@param height: desired height of the destination image
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@type height: int
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"""
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img = gtk.gdk.pixbuf_new_from_file(source)
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scaled = img.scale_simple(width, height, gtk.gdk.INTERP_BILINEAR)
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scaled.save(destination, 'jpeg')
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#-------------------------------------------------------------------------
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#
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# image_size
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#
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#-------------------------------------------------------------------------
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def image_size(source):
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"""
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Returns the width and size of the specified image.
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@param source: source image file, in any format that gtk recongizes
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@type source: unicode
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@rtype: tuple(int, int)
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@returns: a tuple consisting of the width and height
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"""
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try:
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img = gtk.gdk.pixbuf_new_from_file(source)
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width = img.get_width()
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height = img.get_height()
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except gobject.GError:
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width = 0
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height = 0
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return (width, height)
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#-------------------------------------------------------------------------
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#
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# resize_to_jpeg_buffer
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#
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#-------------------------------------------------------------------------
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def resize_to_jpeg_buffer(source, width, height):
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"""
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Loads the image, converting the file to JPEG, and resizing it. Instead of
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saving the file, the data is returned in a buffer.
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@param source: source image file, in any format that gtk recognizes
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@type source: unicode
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@param width: desired width of the destination image
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@type width: int
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@param height: desired height of the destination image
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@type height: int
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@rtype: buffer of data
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@returns: jpeg image as raw data
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"""
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filed, dest = tempfile.mkstemp()
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img = gtk.gdk.pixbuf_new_from_file(source)
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scaled = img.scale_simple(int(width), int(height), gtk.gdk.INTERP_BILINEAR)
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scaled.save(dest, 'jpeg')
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ofile = open(dest, mode='rb')
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data = ofile.read()
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ofile.close()
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try:
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os.unlink(dest)
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except:
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pass
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return data
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