pngtile: pngtile/render.py@df89d13f2354 (annotated)

92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	1	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	2	Rendering output
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	3	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	4
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	5	import os, os.path
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	6
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	7	## Settings
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	8	# width of a tile
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	9	TILE_WIDTH = 256
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	10	TILE_HEIGHT = 256
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	11
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	12	# max. output resolution to allow
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	13	MAX_PIXELS = 1920 * 1200
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	14
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	15	def dir_url (prefix, name, item) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	16	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	17	Join together an absolute URL prefix, an optional directory name, and a directory item
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	18	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	19
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	20	url = prefix
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	21
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	22	if name :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	23	url += '/' + name
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	24
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	25	url += '/' + item
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	26
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	27	return url
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	28
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	29	def dir_list (dir_path) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	30	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	31	Yield a series of directory items to show for the given dir
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	32	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	33
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	34	# link to parent
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	35	yield '..'
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	36
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	37	for item in os.listdir(dir_path) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	38	path = os.path.join(dir_path, item)
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	39
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	40	# skip dotfiles
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	41	if item.startswith('.') :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	42	continue
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	43
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	44	# show dirs
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	45	if os.path.isdir(path) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	46	yield item
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	47
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	48	# examine ext
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	49	base, ext = os.path.splitext(path)
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	50
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	51	# show .png files with a .cache file
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	52	if ext == '.png' and os.path.exists(base + '.cache') :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	53	yield item
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	54
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	55
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	56	### Render HTML data
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	57	def dir_html (prefix, name, path) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	58	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	59	Directory index
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	60	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	61
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	62	name = name.rstrip('/')
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	63
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	64	return """\
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	65	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	66	<head>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	67	<title>Index of %(dir)s</title>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	68	<link rel="Stylesheet" type="text/css" href="%(prefix)s/static/style.css">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	69	</head>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	70	<body>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	71	<h1>Index of %(dir)s</h1>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	72
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	73	<ul>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	74	%(listing)s
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	75	</ul>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	76	</body>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	77	</html>""" % dict(
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	78	prefix = prefix,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	79	dir = '/' + name,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	80
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	81	listing = "\n".join(
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	82	# <li> link
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	83	"""<li><a href="%(url)s">%(name)s</a></li>""" % dict(
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	84	# URL to dir
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	85	url = dir_url(prefix, name, item),
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	86
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	87	# item name
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	88	name = item,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	89	) for item in dir_list(path)
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	90	),
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	91	)
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	92
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	93	def img_html (prefix, name, image) :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	94	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	95	HTML for image
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	96	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	97
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	98	# a little slow, but not so bad - two stats(), heh
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	99	info = image.info()
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	100	img_width, img_height = info['img_width'], info['img_height']
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	101
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	102	return """\
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	103	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	104	<head>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	105	<title>%(title)s</title>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	106	<script src="%(prefix)s/static/prototype.js" type="text/javascript"></script>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	107	<script src="%(prefix)s/static/dragdrop.js" type="text/javascript"></script>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	108	<script src="%(prefix)s/static/builder.js" type="text/javascript"></script>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	109	<script src="%(prefix)s/static/tiles2.js" type="text/javascript"></script>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	110	<link rel="Stylesheet" type="text/css" href="%(prefix)s/static/style.css">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	111	</head>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	112	<body>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	113	<div id="wrapper">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	114	<div id="viewport" style="width: 100%%; height: 100%%">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	115	<div class="overlay">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	116	<input type="button" id="btn-zoom-in" value="Zoom In" />
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	117	<input type="button" id="btn-zoom-out" value="Zoom Out" />
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	118	<a class="link" id="lnk-image" href="#"></a>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	119	</div>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	120
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	121	<div class="substrate"></div>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	122
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	123	<div class="background">
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	124	Loading...
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	125	</div>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	126	</div>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	127	</div>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	128
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	129	<script type="text/javascript">
127 df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	130	var tile_source = new Source("%(tile_url)s", %(tile_width)d, %(tile_height)d, 0, 4, %(img_width)d, %(img_height)d);
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	131	var main = new Viewport(tile_source, "viewport");
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	132	</script>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	133	</body>
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	134	</html>""" % dict(
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	135	title = name,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	136	prefix = prefix,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	137	tile_url = prefix + '/' + name,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	138
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	139	tile_width = TILE_WIDTH,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	140	tile_height = TILE_HEIGHT,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	141
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	142	img_width = img_width,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	143	img_height = img_height,
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	144	)
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	145
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	146
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	147	# threshold to cache images on - only images with a source data region larger than this are cached
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	148	CACHE_THRESHOLD = 512 * 512
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	149
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	150	def scale_by_zoom (val, zoom) :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	151	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	152	Scale dimension by zoom factor
127 df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	153
df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	154	zl > 0 -> bigger
df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	155	zl < 0 -> smaller
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	156	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	157
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	158	if zoom > 0 :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	159	return val << zoom
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	160
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	161	elif zoom > 0 :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	162	return val >> -zoom
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	163
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	164	else :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	165	return val
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	166
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	167	### Image caching
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	168	def check_cache_threshold (width, height, zl) :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	169	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	170	Checks if a tile with the given dimensions should be cached
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	171	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	172
127 df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	173	return (scale_by_zoom(width, zl) * scale_by_zoom(height, zl)) > CACHE_THRESHOLD
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	174
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	175	def render_raw (image, width, height, x, y, zl) :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	176	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	177	Render and return tile
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	178	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	179
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	180	return image.tile_mem(
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	181	width, height,
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	182	x, y, zl
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	183	)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	184
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	185	def render_cache (cache, image, width, height, x, y, zl) :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	186	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	187	Perform a cached render of the given tile
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	188	"""
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	189
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	190	if cache :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	191	# cache key
105 30c091643f75 fix up cache key Tero Marttila <terom@fixme.fi> parents: 103 diff changeset	192	key = "tl_%d:%d_%d:%d:%d_%s" % (x, y, width, height, zl, image.path)
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	193
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	194	# lookup
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	195	data = cache.get(key)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	196
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	197	else :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	198	# oops, no cache
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	199	data = None
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	200
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	201	if not data :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	202	# cache miss, render
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	203	data = render_raw(image, width, height, x, y, zl)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	204
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	205	if cache :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	206	# store
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	207	cache.add(key, data)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	208
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	209	# ok
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	210	return data
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	211
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	212	### Render PNG Data
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	213	def img_png_tile (image, x, y, zoom, cache) :
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	214	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	215	Render given tile, returning PNG data
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	216	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	217
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	218	# remap coordinates by zoom
127 df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	219	x = scale_by_zoom(x, zoom)
df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	220	y = scale_by_zoom(y, zoom)
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	221
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	222	# do we want to cache this?
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	223	if check_cache_threshold(TILE_WIDTH, TILE_HEIGHT, zoom) :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	224	# go via the cache
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	225	return render_cache(cache, image, TILE_WIDTH, TILE_HEIGHT, x, y, zoom)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	226
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	227	else :
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	228	# just go raw
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	229	return render_raw(image, TILE_WIDTH, TILE_HEIGHT, x, y, zoom)
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	230
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	231	def img_png_region (image, cx, cy, zoom, width, height, cache) :
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	232	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	233	Render arbitrary tile, returning PNG data
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	234	"""
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	235
127 df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	236	x = scale_by_zoom(cx - width / 2, zoom)
df89d13f2354 invert zl meaning; zl=0 is 100%, zl=+n is zoomed out Tero Marttila <terom@fixme.fi> parents: 105 diff changeset	237	y = scale_by_zoom(cy - height / 2, zoom)
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	238
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	239	# safely limit
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	240	if width * height > MAX_PIXELS :
e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	241	raise ValueError("Image size: %d * %d > %d" % (width, height, MAX_PIXELS))
103 1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	242
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	243	# these images are always cached
1a6a6957197d basic caching behaviour, not use yet Tero Marttila <terom@fixme.fi> parents: 92 diff changeset	244	return render_cache(cache, image, width, height, x, y, zoom)
92 e50ec4217fe6 separate non-wsgi render layer to render.png Tero Marttila <terom@fixme.fi> parents: diff changeset	245

author	Tero Marttila <terom@fixme.fi>
	Sat, 10 Apr 2010 22:18:41 +0300
changeset 127	df89d13f2354
parent 105	30c091643f75
child 128	66c95c2d212c
permissions	-rw-r--r--