Filter: add a gaussian blur to an element

A gaussian blur effectively blurs an input image or shape by the amount specified in stdev. The standard deviation of stdev is in direct reference to the gaussian distribution that governs the extent of blurring.

filter_gaussian_blur(stdev = 1, what = "source")

Arguments

stdev	The number of standard deviations for the blur effect.
what	What exactly should be blurred? By default, it is the "source" image.

Examples

# Add a green ellipse to an SVG and
# then apply the `filter_gaussian_blur()`
# filter to blur the edges
SVG(width = 200, height = 100) %>%
  svg_filter(
    id = "blur",
    filters = list(
      filter_gaussian_blur(stdev = 2)
    )
  ) %>%
  svg_ellipse(
    x = 40, y = 40,
    width = 50, height = 30,
    attrs = svg_attrs_pres(
      fill = "green",
      filter = "blur"
    )
  )
#> <svg width="200" height="100">
#>   <defs>
#>     <filter id="blur" width="200" height="100">
#>       <feGaussianBlur in="SourceGraphic" stdDeviation="2"/>
#>     </filter>
#>   </defs>
#>   <ellipse cx="40" cy="40" rx="25" ry="15" fill="green" filter="url(#blur)"/>
#> </svg>