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#!/usr/bin/env python
#coding:utf-8
# Author: mozman --<mozman@gmx.at>
# Purpose: svg image element
# Created: 09.10.2010
# Copyright (C) 2010, Manfred Moitzi
# License: MIT License
from svgwrite.base import BaseElement
from svgwrite.mixins import Transform, _vert, _horiz, Clipping
class Image(BaseElement, Transform, Clipping):
""" The **image** element indicates that the contents of a complete file are
to be rendered into a given rectangle within the current user coordinate
system. The **image** element can refer to raster image files such as PNG
or JPEG or to files with MIME type of "image/svg+xml".
"""
elementname = 'image'
def __init__(self, href, insert=None, size=None, **extra):
"""
:param string href: hyperlink to the image resource
:param 2-tuple insert: insert point (**x**, **y**)
:param 2-tuple size: (**width**, **height**)
:param dict attribs: additional SVG attributes
:param extra: additional SVG attributes as keyword-arguments
"""
super(Image, self).__init__(**extra)
self['xlink:href'] = href
if insert is not None:
self['x'] = insert[0]
self['y'] = insert[1]
if size is not None:
self['width'] = size[0]
self['height'] = size[1]
def stretch(self):
""" Stretch viewBox in x and y direction to fill viewport, does not
preserve aspect ratio.
"""
self['preserveAspectRatio'] = 'none'
def fit(self, horiz="center", vert="middle", scale="meet"):
""" Set the preserveAspectRatio attribute.
:param string horiz: horizontal alignment ``'left'|'center'|'right'``
:param string vert: vertical alignment ``'top'|'middle'|'bottom'``
:param string scale: scale method ``'meet'|'slice'``
============= ===========
Scale methods Description
============= ===========
``meet`` preserve aspect ration and zoom to limits of viewBox
``slice`` preserve aspect ration and viewBox touch viewport on all bounds, viewBox will extend beyond the bounds of the viewport
============= ===========
"""
if self.debug and scale not in ('meet', 'slice'):
raise ValueError("Invalid scale parameter '%s'" % scale)
self.attribs['preserveAspectRatio'] = "%s%s %s" % (_horiz[horiz],_vert[vert], scale)