Mercurial > libervia-desktop
comparison src/image.py @ 8:d9095d1dd7ae
added an Image class which accept source without extention
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Fri, 08 Jul 2016 18:30:30 +0200 |
| parents | |
| children |
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| 7:5ebe1592a05a | 8:d9095d1dd7ae |
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| 1 #!/usr/bin/python | |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 # Cagou: desktop/mobile frontend for Salut à Toi XMPP client | |
| 5 # Copyright (C) 2016 Jérôme Poisson (goffi@goffi.org) | |
| 6 | |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 | |
| 21 from sat.core import log as logging | |
| 22 log = logging.getLogger(__name__) | |
| 23 from kivy.uix import image as kivy_img | |
| 24 from kivy.core.image import Image as CoreImage | |
| 25 from kivy.resources import resource_find | |
| 26 import io | |
| 27 import PIL | |
| 28 | |
| 29 | |
| 30 class Image(kivy_img.Image): | |
| 31 """Image widget which accept source without extension""" | |
| 32 | |
| 33 def texture_update(self, *largs): | |
| 34 if not self.source: | |
| 35 self.texture = None | |
| 36 else: | |
| 37 filename = resource_find(self.source) | |
| 38 self._loops = 0 | |
| 39 if filename is None: | |
| 40 return log.error('Image: Error reading file {filename}'. | |
| 41 format(filename=self.source)) | |
| 42 mipmap = self.mipmap | |
| 43 if self._coreimage is not None: | |
| 44 self._coreimage.unbind(on_texture=self._on_tex_change) | |
| 45 try: | |
| 46 self._coreimage = ci = CoreImage(filename, mipmap=mipmap, | |
| 47 anim_delay=self.anim_delay, | |
| 48 keep_data=self.keep_data, | |
| 49 nocache=self.nocache) | |
| 50 except Exception as e: | |
| 51 # loading failed probably because of unmanaged extention, | |
| 52 # we try our luck with with PIL | |
| 53 try: | |
| 54 im = PIL.Image.open(filename) | |
| 55 ext = im.format.lower() | |
| 56 del im | |
| 57 # we can't use im.tobytes as it would use the | |
| 58 # internal decompressed representation from pillow | |
| 59 # and im.save would need processing to handle format | |
| 60 data = io.BytesIO(open(filename, "rb").read()) | |
| 61 cache_filename = u"{}.{}".format(filename,ext) # needed for kivy's Image to use cache | |
| 62 self._coreimage = ci = CoreImage(data, ext=ext, | |
| 63 filename=cache_filename, mipmap=mipmap, | |
| 64 anim_delay=self.anim_delay, | |
| 65 keep_data=self.keep_data, | |
| 66 nocache=self.nocache) | |
| 67 except Exception as e: | |
| 68 log.warning(u"Can't load image: {}".format(e)) | |
| 69 self._coreimage = ci = None | |
| 70 | |
| 71 if ci: | |
| 72 ci.bind(on_texture=self._on_tex_change) | |
| 73 self.texture = ci.texture |