added cache builder script...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ui/TODO.otl

@@ -34,6 +34,8 @@ Priority work
 					[_] directory lister
 				[X] basic test
 				[X] disable transitions...
+		[_] load sorted images from JSON data
+		| curently the sort is as in file...
 		[_] load higher resolution images OVER lower res to avoid "blackouts"
 		| plus, might be good to keep the low-res versions loaded...
 		|

ui/buildcache.py

@@ -0,0 +1,136 @@
+#=======================================================================
+
+__version__ = '''0.0.01'''
+__sub_version__ = '''20120922031956'''
+__copyright__ = '''(c) Alex A. Naanou 2012'''
+
+
+#-----------------------------------------------------------------------
+
+import os
+import Image
+import json
+
+from pli.logictypes import OR
+
+
+#-----------------------------------------------------------------------
+# TODO:
+# 	- load config from file...
+# 	- accept a path on command-line
+# 	- default path is cwd
+#
+#-----------------------------------------------------------------------
+
+config = {
+	'cache-structure': {
+		# XXX make these as close to standard as possible and keep
+		# 	  sane distances...
+		'150px': '.ImageGridCache/150px/',
+		'350px': '.ImageGridCache/350px/',
+		'900px': '.ImageGridCache/900px/',
+		'1080px': '.ImageGridCache/1080px/',
+		'1920px': '.ImageGridCache/1920px/',
+	},
+	'sizes': {
+		'150px': 150,
+		'350px': 350,
+		'900px': 900,
+		'1080px': 1080,
+		'1920px': 1920,
+	}
+}
+
+
+images = {
+	'position': 0,
+	'ribbons':[
+		{}
+	]
+}
+
+
+IMAGE_EXT = OR(*(
+		'.jpg', '.jpeg', '.JPG', '.JPEG',
+))
+
+
+#-----------------------------------------------------------------------
+
+# return list of paths ending in a pattern...
+def build_cache_dirs(path, config=config):
+	'''
+	'''
+	dirs = config['cache-structure']
+	for _, k in dirs.items():
+		p = os.path.join(path, k)
+		if not os.path.exists(p):
+			os.makedirs(p)
+
+
+# XXX this will not overwrite existing files...
+def make_cache_images(path, config=config):
+	'''
+	'''
+	dirs = config['cache-structure']
+	sizes = config['sizes'] 
+	n = 0
+
+	for name in os.listdir(path):
+		# skip non-images...
+		iid, ext = os.path.splitext(name)
+		if ext != IMAGE_EXT:
+			continue
+		print '.',
+		n += 1
+		i = images['ribbons'][0][iid] = {
+			'id': iid,
+			'preview': {},
+		}
+		img = Image.open(os.path.join(path, name))
+		# add original image to struct...
+		i['preview'][str(max(*img.size)) + 'px'] = os.path.join(path, name)
+		# previews...
+		for k, spec in sizes.items():
+			p = os.path.join(path, dirs[k], name)
+			# do not upscale images...
+			if max(*img.size) <= spec:
+				continue
+			# add image to index...
+			i['preview'][str(spec) + 'px'] = p
+			if not os.path.exists(p):
+				scale = spec/float(max(*img.size))
+				preview = img.resize((int(img.size[0]*scale), int(img.size[1]*scale)), Image.ANTIALIAS)
+				preview.save(p)
+				##!!! metadata???
+				##!!!
+		i['preview'][str(spec) + 'px'] = p
+	images['position'] = images['ribbons'][0].keys()[0]
+	with open(os.path.join(path, '.ImageGridCache.json'), 'w') as f:
+		json.dump(images, f, indent=4)
+	##!!! STUB...
+	return n
+
+
+
+#-----------------------------------------------------------------------
+if __name__ == '__main__':
+	PATH = 'images/cache-test/'
+
+	import time
+
+	t0 = time.time()
+
+	build_cache_dirs(PATH)
+
+	n = make_cache_images(PATH)
+
+	t1 = time.time()
+
+	print
+	print 'Processed %s images in %s seconds.' % (n, t1-t0)
+
+
+
+#=======================================================================
+#                                            vim:set ts=4 sw=4 nowrap :