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annotate orpg/mapper/images.py @ 0:4385a7d0efd1 grumpy-goblin

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Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
author sirebral
date Tue, 14 Jul 2009 16:41:58 -0500
parents
children d5e81dac98ff
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0
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1 # Copyright (C) 2000-2001 The OpenRPG Project
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2 #
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3 # openrpg-dev@lists.sourceforge.net
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 # --
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19 #
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20 # File: mapper/images.py
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21 # Author: OpenRPG
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22 # Maintainer:
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23 # Version:
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24 # $Id: images.py,v 1.21 2007/12/11 04:07:15 digitalxero Exp $
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25 #
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26 # Description:
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27 #
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28 __version__ = "$Id: images.py,v 1.21 2007/12/11 04:07:15 digitalxero Exp $"
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29
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30 import urllib
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31 import Queue
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32 import thread
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33 from threading import Lock
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34 import time
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35 from orpg.orpg_wx import *
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36 from orpg.orpgCore import *
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37
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38 def singleton(cls):
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39 instances = {}
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40 def getinstance():
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41 if cls not in instances:
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42 instances[cls] = cls()
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43 return instances[cls]
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44 return getinstance()
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45
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46 class ImageHandlerClass(object):
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47 __cache = {}
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48 __fetching = {}
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49 __queue = Queue.Queue(0)
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50 __lock = Lock()
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51
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52 def load(self, path, image_type, imageId):
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53 # Load an image, with a intermideary fetching image shown while it loads in a background thread
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54 if self.__cache.has_key(path):
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55 return wx.ImageFromMime(self.__cache[path][1], self.__cache[path][2]).ConvertToBitmap()
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56 if not self.__fetching.has_key(path):
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57 self.__fetching[path] = True
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58 #Start Image Loading Thread
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59 thread.start_new_thread(self.__loadThread, (path, image_type, imageId))
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60 else:
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61 if self.__fetching[path] is True:
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62 thread.start_new_thread(self.__loadCacheThread, (path, image_type, imageId))
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63 return wx.Bitmap(open_rpg.get_component("dir_struct")["icon"] + "fetching.png", wx.BITMAP_TYPE_PNG)
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64
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65 def directLoad(self, path):
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66 # Directly load an image, no threads
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67 if self.__cache.has_key(path):
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68 return wx.ImageFromMime(self.__cache[path][1], self.__cache[path][2]).ConvertToBitmap()
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69 uriPath = urllib.unquote(path)
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70 try:
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71 d = urllib.urlretrieve(uriPath)
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72 # We have to make sure that not only did we fetch something, but that
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73 # it was an image that we got back.
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74 if d[0] and d[1].getmaintype() == "image":
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75 self.__cache[path] = (path, d[0], d[1].gettype(), None)
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76 return wx.ImageFromMime(self.__cache[path][1], self.__cache[path][2]).ConvertToBitmap()
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77 else:
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78 open_rpg.get_component('log').log("Image refused to load or URI did not reference a valid image: " + path, ORPG_GENERAL, True)
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79 return None
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80 except IOError:
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81 open_rpg.get_component('log').log("Unable to resolve/open the specified URI; image was NOT loaded: " + path, ORPG_GENERAL, True)
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82 return None
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83
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84 def cleanCache(self):
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85 # Shrinks the Cache down to the proper size
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86 try:
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87 cacheSize = int(open_rpg.get_component('settings').get_setting("ImageCacheSize"))
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88 except:
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89 cacheSize = 32
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90 cache = self.__cache.keys()
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91 cache.sort()
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92 for key in cache[cacheSize:]:
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93 del self.__cache[key]
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94
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95 def flushCache(self):
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96 # This function will flush all images contained within the image cache.
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97 self.__lock.acquire()
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98 try:
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99 keyList = self.__cache.keys()
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100 for key in keyList:
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101 del self.__cache[key]
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102 finally:
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103 self.__lock.release()
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104 urllib.urlcleanup()
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105
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106 #Private Methods
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107 def __loadThread(self, path, image_type, imageId):
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108 uriPath = urllib.unquote(path)
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109 self.__lock.acquire()
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110 try:
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111 d = urllib.urlretrieve(uriPath)
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112 # We have to make sure that not only did we fetch something, but that
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113 # it was an image that we got back.
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114 if d[0] and d[1].getmaintype() == "image":
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115 self.__cache[path] = (path, d[0], d[1].gettype(), imageId)
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116 self.__queue.put((self.__cache[path], image_type, imageId))
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117 if self.__fetching.has_key(path):
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118 del self.__fetching[path]
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119 else:
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120 open_rpg.get_component('log').log("Image refused to load or URI did not reference a valid image: " + path, ORPG_GENERAL, True)
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121 self.__fetching[path] = False
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122 except IOError:
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123 self.__fetching[path] = False
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124 open_rpg.get_component('log').log("Unable to resolve/open the specified URI; image was NOT laoded: " + path, ORPG_GENERAL, True)
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125 finally:
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126 self.__lock.release()
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127
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128 def __loadCacheThread(self, path, image_type, imageId):
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129 try:
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130 st = time.time()
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131 while self.__fetching.has_key(path) and self.__fetching[path] is not False:
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132 time.sleep(0.025)
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133 if (time.time()-st) > 120:
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134 open_rpg.get_component('log').log("Timeout: " + path, ORPG_GENERAL, True)
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135 break
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136 except:
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137 self.__fetching[path] = False
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138 open_rpg.get_component('log').log("Unable to resolve/open the specified URI; image was NOT loaded: " + path, ORPG_GENERAL, True)
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139 return
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140 self.__lock.acquire()
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141 try:
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142 open_rpg.get_component('log').log("Adding Image to Queue from Cache: " + str(self.__cache[path]), ORPG_DEBUG)
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143 self.__queue.put((self.__cache[path], image_type, imageId))
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144 finally:
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145 self.__lock.release()
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146
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147 #Property Methods
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148 def _getCache(self):
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149 return self.__cache
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150
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151 def _getQueue(self):
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152 return self.__queue
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153
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154 #Properties
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155 Cache = property(_getCache)
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156 Queue = property(_getQueue)
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157
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158 ImageHandler = singleton(ImageHandlerClass)