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#!/usr/bin/env python
#
# Ceibal Chess - A chess activity for Sugar.
# Copyright (C) 2008, 2009 Alejandro Segovia <asegovi@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
import pygame
import os
import logging
log = logging.getLogger()
class ImageManager:
'''Load and manage images, making them available through the applications.
All image access should be performed through the singleton instance of
this class, under the name imagem_anager. Usage of pygame.image.load
should be avoided in favor of image_manager.get_image(<img_file_name>).'''
def __init__(self):
'''Create a new instance of ImageManager. Only one instance of
this class should exist at any time, which is accessible as
the variable "image_manager"'''
self.images = { }
def get_image(self, imgname):
'''Look for an image in the internal image dictionary. If the
image is available, return it, otherwise load it from disk and keep
an keep a reference to it.'''
try:
return self.images[imgname]
except KeyError, err:
log.debug("Image '%s' not found. Loading...", imgname)
try:
path = os.environ["SUGAR_BUNDLE_PATH"]
if not "Ajedrez.activity" in path:
print "Running ceibal-chess from Terminal or some other place"
path = ""
except:
path = ""
self.images[imgname] = pygame.image.load(os.path.join(path, "data_bw", imgname))
log.debug("Image '%s': %dx%d" % (imgname, \
self.images[imgname].get_width(), \
self.images[imgname].get_height()))
return self.images[imgname]
#ImageManager singleton
image_manager = ImageManager()
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