Source code for openpyxl.drawing.image

from __future__ import absolute_import
from __future__ import division
# Copyright (c) 2010-2017 openpyxl

from io import BytesIO
from .drawing import Drawing
from openpyxl.compat import deprecated

[docs]def bounding_box(bw, bh, w, h): """ Returns a tuple (new_width, new_height) which has the property that it fits within box_width and box_height and has (close to) the same aspect ratio as the original size """ new_width, new_height = w, h if bw and new_width > bw: new_width = bw new_height = new_width / (w / h) if bh and new_height > bh: new_height = bh new_width = new_height * (w / h) return (new_width, new_height)
def _import_image(img): try: try: import Image as PILImage except ImportError: from PIL import Image as PILImage except ImportError: raise ImportError('You must install PIL to fetch image objects') if not isinstance(img, PILImage.Image): img = return img
[docs]class Image(object): """ Raw Image class """ _id = 1 _path = "/xl/media/image{0}.{1}" def __init__(self, img, coordinates=((0, 0), (1, 1)), size=(None, None), nochangeaspect=True, nochangearrowheads=True): self.ref = img # don't keep the image open image = _import_image(img) self.format = image.format.lower() self.nochangeaspect = nochangeaspect # deprecated self.nochangearrowheads = nochangearrowheads # deprecated newsize = bounding_box( size[0], size[1], image.size[0], image.size[1] ) size = newsize # the containing drawing self.drawing = Drawing() self.drawing.coordinates = coordinates # deprecated self.drawing.width = size[0] self.drawing.height = size[1]
[docs] @deprecated("Anchors can be passed in when an image is added to a worksheet") def anchor(self, cell, anchortype="absolute"): """ anchors the image to the given cell optional parameter anchortype supports 'absolute' or 'oneCell'""" self.drawing.anchortype = anchortype if anchortype == "absolute": self.drawing.left, = cell.anchor return ((cell.column, cell.row), cell.parent.point_pos( + self.drawing.height, self.drawing.left + self.drawing.width)) elif anchortype == "oneCell": self.drawing.anchorcol = cell.col_idx - 1 self.drawing.anchorrow = cell.row - 1 return ((self.drawing.anchorcol, self.drawing.anchorrow), None) else: raise ValueError("unknown anchortype %s" % anchortype)
def _data(self): """ Open image and write it to a buffer when saving the workbook """ img = _import_image(self.ref) fp = None # don't convert these file formats if self.format in ['gif', 'jpeg', 'png']: if img.fp: fp = img.fp if not fp: fp = BytesIO(), format=self.format) return @property def path(self): return self._path.format(self._id, self.format)