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Viewing File: /opt/cloudlinux/venv/lib/python3.11/site-packages/svgwrite/filters.py

#!/usr/bin/env python
#coding:utf-8
# Author:  mozman --<mozman@gmx.at>
# Purpose: filters module
# Created: 03.11.2010
# Copyright (C) 2010, Manfred Moitzi
# License: MIT License

from svgwrite.base import BaseElement
from svgwrite.mixins import XLink, Presentation
from svgwrite.utils import strlist, is_string

__all__ = ['Filter']


class _feDistantLight(BaseElement):
    elementname = 'feDistantLight'

    def __init__(self, azimuth=0, elevation=0, **extra):
        super(_feDistantLight, self).__init__(**extra)
        if azimuth != 0:
            self['azimuth'] = azimuth
        if elevation != 0:
            self['elevation'] = elevation


class _fePointLight(BaseElement):
    elementname = 'fePointLight'

    def __init__(self, source=(0, 0, 0), **extra):
        super(_fePointLight, self).__init__(**extra)
        x, y, z = source
        if x != 0:
            self['x'] = x
        if y != 0:
            self['y'] = y
        if z != 0:
            self['z'] = z


class _feSpotLight(_fePointLight):
    elementname = 'feSpotLight'

    def __init__(self, source=(0, 0, 0), target=(0, 0, 0), **extra):
        super(_feSpotLight, self).__init__(source, **extra)
        x, y, z = target
        if x != 0:
            self['pointsAtX'] = x
        if y != 0:
            self['pointsAtY'] = y
        if z != 0:
            self['pointsAtZ'] = z


class _FilterPrimitive(BaseElement, Presentation):
    pass


class _FilterNoInput(_FilterPrimitive):
    def __init__(self, start=None, size=None, **extra):
        super(_FilterNoInput, self).__init__(**extra)
        if start is not None:
            self['x'] = start[0]
            self['y'] = start[1]
        if size is not None:
            self['width'] = size[0]
            self['height'] = size[1]


class _FilterRequireInput(_FilterNoInput):
    def __init__(self, in_='SourceGraphic', **extra):
        super(_FilterRequireInput, self).__init__(**extra)
        self['in'] = in_


class _feBlend(_FilterRequireInput):
    elementname = 'feBlend'


class _feColorMatrix(_FilterRequireInput):
    elementname = 'feColorMatrix'


class _feComponentTransfer(_FilterRequireInput):
    elementname = 'feComponentTransfer'

    def feFuncR(self, type_, **extra):
        return self.add(_feFuncR(type_, factory=self, **extra))

    def feFuncG(self, type_, **extra):
        return self.add(_feFuncG(type_, factory=self, **extra))

    def feFuncB(self, type_, **extra):
        return self.add(_feFuncB(type_, factory=self, **extra))

    def feFuncA(self, type_, **extra):
        return self.add(_feFuncA(type_, factory=self, **extra))


class _feFuncR(_FilterPrimitive):
    elementname = 'feFuncR'

    def __init__(self, type_, **extra):
        super(_feFuncR, self).__init__(**extra)
        self['type'] = type_


class _feFuncG(_feFuncR):
    elementname = 'feFuncG'


class _feFuncB(_feFuncR):
    elementname = 'feFuncB'


class _feFuncA(_feFuncR):
    elementname = 'feFuncA'


class _feComposite(_FilterRequireInput):
    elementname = 'feComposite'


class _feConvolveMatrix(_FilterRequireInput):
    elementname = 'feConvolveMatrix'


class _feDiffuseLighting(_FilterRequireInput):
    elementname = 'feDiffuseLighting'

    def feDistantLight(self, azimuth=0, elevation=0, **extra):
        return self.add(_feDistantLight(azimuth, elevation, **extra))

    def fePointLight(self, source=(0, 0, 0), **extra):
        return self.add(_fePointLight(source, **extra))

    def feSpotLight(self, source=(0, 0, 0), target=(0, 0, 0), **extra):
        return self.add(_feSpotLight(source, target, **extra))


class _feDisplacementMap(_FilterRequireInput):
    elementname = 'feDisplacementMap'


class _feFlood(_FilterNoInput):
    elementname = 'feFlood'


class _feGaussianBlur(_FilterRequireInput):
    elementname = 'feGaussianBlur'


class _feImage(_FilterNoInput, XLink):
    elementname = 'feImage'

    def __init__(self, href, start=None, size=None, **extra):
        super(_feImage, self).__init__(start, size, **extra)
        self.set_href(href)


class _feMergeNode(_FilterPrimitive):
    elementname = 'feMergeNode'


class _feMerge(_FilterNoInput):
    elementname = 'feMerge'
    def __init__(self, layernames, **extra):
        super(_feMerge, self).__init__(**extra)
        self.feMergeNode(layernames)

    def feMergeNode(self, layernames):
        for layername in layernames:
            self.add(_feMergeNode(in_=layername, factory=self))


class _feMorphology(_FilterRequireInput):
    elementname = 'feMorphology'


class _feOffset(_FilterRequireInput):
    elementname = 'feOffset'


class _feSpecularLighting(_feDiffuseLighting):
    elementname = 'feSpecularLighting'


class _feTile(_FilterRequireInput):
    elementname = 'feTile'


class _feTurbulence(_FilterNoInput):
    elementname = 'feTurbulence'


filter_factory = {
    'feBlend': _feBlend,
    'feColorMatrix': _feColorMatrix,
    'feComponentTransfer': _feComponentTransfer,
    'feComposite': _feComposite,
    'feConvolveMatrix': _feConvolveMatrix,
    'feDiffuseLighting': _feDiffuseLighting,
    'feDisplacementMap': _feDisplacementMap,
    'feFlood': _feFlood,
    'feGaussianBlur': _feGaussianBlur,
    'feImage': _feImage,
    'feMerge': _feMerge,
    'feMorphology': _feMorphology,
    'feOffset': _feOffset,
    'feSpecularLighting': _feSpecularLighting,
    'feTile': _feTile,
    'feTurbulence': _feTurbulence,
}


class _FilterBuilder(object):
    def __init__(self, cls, parent):
        self.cls = cls # primitive filter class to build
        self.parent = parent # the parent Filter() object

    def __call__(self, *args, **kwargs):
        kwargs['factory'] = self.parent # to get the _paramters object
        obj = self.cls(*args, **kwargs) # create an object of type 'cls'
        self.parent.add(obj) # add primitive filter to parent Filter()
        return obj


class Filter(BaseElement, XLink, Presentation):
    """
    The filter element is a container element for filter primitives, and
    also a **factory** for filter primitives.
    """
    elementname = 'filter'

    def __init__(self, start=None, size=None, resolution=None, inherit=None, **extra):
        """
        :param 2-tuple start: defines the start point of the filter effects region (**x**, **y**)
        :param 2-tuple size: defines the size of the filter effects region (**width**, **height**)
        :param resolution: takes the form ``'x-pixels [y-pixels]'``, and indicates
            the width and height of the intermediate images in pixels.
        :param inherit: inherits properties from Filter `inherit` see: **xlink:href**

        """
        super(Filter, self).__init__(**extra)
        if start is not None:
            self['x'] = start[0]
            self['y'] = start[1]
        if size is not None:
            self['width'] = size[0]
            self['height'] = size[1]
        if resolution is not None:
            if is_string(resolution):
                self['filterRes'] = resolution
            elif hasattr(resolution, '__iter__'):
                self['filterRes'] = strlist(resolution, ' ')
            else:
                self['filterRes'] = str(resolution)

        if inherit is not None:
            self.href = inherit
            self.update_id()

    def get_xml(self):
        self.update_id()
        return super(Filter, self).get_xml()

    def __getattr__(self, name):
        # create primitive filters by Filter.<filtername>(...)
        # and auto-add the new filter as subelement of Filter()
        if name in filter_factory:
            return _FilterBuilder(filter_factory[name], self)
        else:
            raise AttributeError("'%s' has no attribute '%s'" % (self.__class__.__name__, name))
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