def __init__(self, dp, **kw):
DefaultRenderer.__init__(self, dp, **kw)
Purr.progressMessage("rendering %s" % dp.filename, sub=True)
img = PIL.Image.open(dp.fullpath)
# If image format is not compatible with browsers, save it in PNG format.
# self.fullimage will refer to the browser-compatible image, to which the thumbnail will link
if img.format not in ["GIF", "JPEG", "PNG"]:
self.fullimage, path, uptodate = self.subproduct("-full.png")
if not uptodate:
try:
img.save(path, "PNG")
except:
print("Error saving %s in PNG format" % path)
traceback.print_exc()
self.fullimage = dp.filename
else:
self.fullimage = dp.filename
# now, do we need to generate a thumbnail?
tsize = self.getOption("image-thumbnail-width"), self.getOption("image-thumbnail-height")
width, height = img.size
factors = width / float(tsize[0]), height / float(tsize[1])
if max(factors) <= 1:
self.thumbnail = self.fullimage
else:
# regenerate thumbnail if needed
self.thumbnail, path, uptodate = self.subproduct("-thumb.png")
try:
# regenerate only if doesn't exist
if not uptodate:
# use max resize factor
factor = max(factors)
img = img.resize((int(width / factor), int(height / factor)), PIL.Image.ANTIALIAS)
img.save(path, "PNG")
except:
print("Error saving thumbnail %s in PNG format" % path)
traceback.print_exc()
self.thumbnail = None
def __init__(self, dp, refresh=0):
DefaultRenderer.__init__(self, dp, refresh=refresh)
self.rendercache = {}
self._regenerated = False
class ImageRenderer(DefaultRenderer):
"""This class renders PIL-compatible image data products."""
_extensions = set([
"jpg", "jpeg", "png", "gif", "xpm", "ppm", "pbm", "pnm", "tiff", "tif"
])
@staticmethod
def canRender(filename):
"""Check extensions."""
name, ext = os.path.splitext(filename)
ext = ext.lstrip('.').lower()
if ext in ImageRenderer._extensions:
return 100
else:
return False
# this gives a short ID for the class (used in GUIs and such)
renderer_id = "image"
# this gives a documentation string. You can use rich text here
renderer_doc = """<P>The "image" plugin provides rendering of image-type data products.
It can render any image that is compatible with the Python Image Library."""
# define renderer options
DefaultRenderer.addOption("image-thumbnail-width", 512, dtype=int, doc="Maximum width of thumbnails")
DefaultRenderer.addOption("image-thumbnail-height", 256, dtype=int, doc="Maximum height of thumbnails")
def __init__(self, dp, **kw):
DefaultRenderer.__init__(self, dp, **kw)
Purr.progressMessage("rendering %s" % dp.filename, sub=True)
img = PIL.Image.open(dp.fullpath)
# If image format is not compatible with browsers, save it in PNG format.
# self.fullimage will refer to the browser-compatible image, to which the thumbnail will link
if img.format not in ["GIF", "JPEG", "PNG"]:
self.fullimage, path, uptodate = self.subproduct("-full.png")
if not uptodate:
try:
img.save(path, "PNG")
except:
print("Error saving %s in PNG format" % path)
traceback.print_exc()
self.fullimage = dp.filename
else:
self.fullimage = dp.filename
# now, do we need to generate a thumbnail?
tsize = self.getOption("image-thumbnail-width"), self.getOption("image-thumbnail-height")
width, height = img.size
factors = width / float(tsize[0]), height / float(tsize[1])
if max(factors) <= 1:
self.thumbnail = self.fullimage
else:
# regenerate thumbnail if needed
self.thumbnail, path, uptodate = self.subproduct("-thumb.png")
try:
# regenerate only if doesn't exist
if not uptodate:
# use max resize factor
factor = max(factors)
img = img.resize((int(width / factor), int(height / factor)), PIL.Image.ANTIALIAS)
img.save(path, "PNG")
except:
print("Error saving thumbnail %s in PNG format" % path)
traceback.print_exc()
self.thumbnail = None
def renderThumbnail(self, relpath=""):
"""renderThumbnail() is called to render a thumbnail of the DP (e.g. in Data Product tables)."""
# no thumbnail -- return empty string
if self.thumbnail is None:
return ""
# else thumbnail is same as full image (because image was small enough), insert directly
elif self.thumbnail is self.fullimage:
fname = relpath + self.fullimage
return """<IMG SRC="%s" ALT="%s"></IMG>""" % (quote_url(fname), quote_url(os.path.basename(self.filename)))
# else return thumbnail linking to full image
else:
tname = relpath + self.thumbnail
fname = relpath + self.fullimage
return """<A HREF="%s"><IMG SRC="%s" ALT="%s"></A>""" % (
quote_url(fname), quote_url(tname), quote_url(os.path.basename(self.filename)))
def __init__(self, dp, refresh=0):
DefaultRenderer.__init__(self, dp, refresh=refresh)
self.rendercache = {}
self._regenerated = False
