freeimage.py 文件源码

def _rotate(self, im, meta):
            """ Use Orientation information from EXIF meta data to 
            orient the image correctly. Freeimage is also supposed to
            support that, and I am pretty sure it once did, but now it
            does not, so let's just do it in Python.
            Edit: and now it works again, just leave in place as a fallback.
            """
            if self.request.kwargs.get('exifrotate', None) == 2:
                try:
                    ori = meta['EXIF_MAIN']['Orientation']
                except KeyError:  # pragma: no cover
                    pass  # Orientation not available
                else:  # pragma: no cover - we cannot touch all cases
                    # www.impulseadventure.com/photo/exif-orientation.html
                    if ori in [1, 2]:
                        pass
                    if ori in [3, 4]:
                        im = np.rot90(im, 2)
                    if ori in [5, 6]:
                        im = np.rot90(im, 3)
                    if ori in [7, 8]:
                        im = np.rot90(im)
                    if ori in [2, 4, 5, 7]:  # Flipped cases (rare)
                        im = np.fliplr(im)
            return im

    # --