c2624fb48e
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2927 fd906abe-77d9-0310-91a1-e0d9ade77398
91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
#
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# Copyright (c) 2008 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Views for displaying media assets.
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Authors: Johann Schimpf, Erich Seifert.
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$Id$
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"""
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from logging import getLogger
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try:
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import Image
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except ImportError:
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getLogger('Asset Manager').warn('Python Imaging Library could not be found.')
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from zope.interface import implements
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from cybertools.media.interfaces import IMediaAsset, IFileTransform
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from cybertools.storage.filesystem import FileSystemStorage
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def mimetypeToPIL(mimetype):
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return mimetype.split("/",1)[-1]
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class PILTransform(object):
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""" Class for image transformation methods.
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Based on the Python Imaging Library.
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"""
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implements(IFileTransform)
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def open(self, path):
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self.im = Image.open(path)
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def rotate(self, angle, resize):
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self.im = self.im.rotate(angle,Image.BICUBIC)
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def color(self, mode):
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if not mode:
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return
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mode = mode.upper()
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if mode == "BITMAP":
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mode = "1"
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elif mode == "GRAYSCALE":
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mode = "L"
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self.im = self.im.convert(mode)
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def crop(self, relWidth, relHeight, alignX=0.5, alignY=0.5):
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alignX = min(max(alignX, 0.0), 1.0)
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alignY = min(max(alignY, 0.0), 1.0)
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w, h = self.im.size
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imgAspect = float(w) / float(h)
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crpAspect = relWidth / relHeight
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if imgAspect >= crpAspect:
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crpWidth = h * crpAspect
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crpHeight = h
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else:
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crpWidth = w
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crpHeight = w / crpAspect
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left = int((w - crpWidth) * alignX)
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upper = int((h - crpHeight) * alignY)
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right = int(left + crpWidth)
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lower = int(upper + crpHeight)
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box = (left, upper, right, lower)
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self.im = self.im.crop(box)
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def resize(self, width, height):
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dims = (width, height)
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self.im.thumbnail(dims, Image.ANTIALIAS)
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def save(self, path, mimetype):
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format = mimetypeToPIL(mimetype)
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self.im.save(path)
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