meterutil.py

# Copyright 2016-2018 PeppyMeter peppy.player@gmail.com
# 
# This file is part of PeppyMeter.
# 
# PeppyMeter 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 3 of the License, or
# (at your option) any later version.
# 
# PeppyMeter 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 PeppyMeter. If not, see <http://www.gnu.org/licenses/>.

import pygame

class MeterUtil(object):
    """ Utility class """
    
    def __init__(self, read_config=True):
        """ Initializer """

        self.image_cache = {}
    
    def load_pygame_image(self, path):
        """ Check if image is in the cache.
         
        If yes, return the image from the cache.
        If not load image file and place it in the cache.
        
        :param path: image path
        
        :return: pygame image
        """
        image = None
        try:
            i = self.image_cache[path]            
            return (path, i)
        except KeyError:
            pass
            
        try:            
            image = pygame.image.load(path).convert_alpha()
        except:
            pass
            
        if image:
            self.image_cache[path] = image
            return (path, image)
        else:
            return None