def thumb(self, resource, width, height, prefix, crop_type, options, preserve_orientation=False):
"""
Generate a thumbnail for the given image
"""
name = os.path.basename(resource.get_relative_deploy_path())
# don't make thumbnails for thumbnails
if name.startswith(prefix):
return
# Prepare path, make all thumnails in single place(content/.thumbnails)
# for simple maintenance but keep original deploy path to preserve
# naming logic in generated site
path = os.path.join(".thumbnails",
os.path.dirname(resource.get_relative_deploy_path()),
"%s%s" % (prefix, name))
target = resource.site.config.content_root_path.child_file(path)
res = self.site.content.add_resource(target)
res.set_relative_deploy_path(res.get_relative_deploy_path().replace('.thumbnails/', '', 1))
target.parent.make()
if os.path.exists(target.path) and os.path.getmtime(resource.path) <= os.path.getmtime(target.path):
return
self.logger.debug("Making thumbnail for [%s]" % resource)
im = self.Image.open(resource.path)
if im.mode != 'RGBA':
im = im.convert('RGBA')
format = im.format
if preserve_orientation and im.size[1] > im.size[0]:
width, height = height, width
resize_width, resize_height = thumb_scale_size(im.size[0], im.size[1], width, height)
self.logger.debug("Resize to: %d,%d" % (resize_width, resize_height))
im = im.resize((resize_width, resize_height), self.Image.ANTIALIAS)
if width is not None and height is not None:
shiftx = shifty = 0
if crop_type == "center":
shiftx = (im.size[0] - width)/2
shifty = (im.size[1] - height)/2
elif crop_type == "bottomright":
shiftx = (im.size[0] - width)
shifty = (im.size[1] - height)
im = im.crop((shiftx, shifty, width + shiftx, height + shifty))
im.load()
im.save(target.path, **options)
def test_height_and_width_landscape(self):
ow, oh = 200, 100
nw, nh = thumb_scale_size(ow, oh, 50, 50)
assert nw == 100
assert nh == 50
def test_height_and_width_portrait(self):
ow, oh = 100, 200
nw, nh = thumb_scale_size(ow, oh, 50, 50)
assert nw == 50
assert nh == 100
def test_height_only_nonintegral(self):
ow, oh = 105, 200
nw, nh = thumb_scale_size(ow, oh, None, 100)
assert nw == 53
assert nh == 100
def test_height_only(self):
ow, oh = 100, 200
nw, nh = thumb_scale_size(ow, oh, None, 100)
assert nw == 50
assert nh == 100
def test_width_only_nonintegral(self):
ow, oh = 100, 205
nw, nh = thumb_scale_size(ow, oh, 50, None)
assert nw == 50
assert nh == 103
def test_width_only(self):
ow, oh = 100, 200
nw, nh = thumb_scale_size(ow, oh, 50, None)
assert nw == 50
assert nh == 100
