Module rsvg::filter_func

SVG2 filter function shortcuts - blur(), brightness(), etc.

The <filter> element from SVG1.1 (also present in SVG2) uses some verbose XML to define chains of filter primitives. In SVG2, there is a shortcut form of the filter attribute and property, where one can simply say filter="blur(5)" and get the equivalent of writing a full <filter> with a <feGaussianBlur> element.

This module has a type for each of the filter functions in SVG2 with the function’s parameters, for example Blur stores the blur’s standard deviation parameter.

Those types get aggregated in the FilterFunction enum. A FilterFunction can then convert itself into a FilterSpec, which is ready to be rendered on a surface.

Structs

• Blur
  Parameters for the blur() filter function
• Brightness
  Parameters for the brightness() filter function
• Contrast
  Parameters for the contrast() filter function
• DropShadow
  Parameters for the drop-shadow() filter function
• Grayscale
  Parameters for the grayscale() filter function
• HueRotate
  Parameters for the hue-rotate() filter function
• Invert
  Parameters for the invert() filter function
• Opacity
  Parameters for the opacity() filter function
• Saturate
  Parameters for the saturate() filter function
• Sepia
  Parameters for the sepia() filter function

Enums

• FilterFunction
  CSS Filter functions from the Filter Effects Module Level 1

Functions

• drop_shadow_primitives
  Creates the filter primitives required for a feDropShadow effect.
• parse_blur 🔒
• parse_brightness 🔒
• parse_contrast 🔒
• parse_dropshadow 🔒
• parse_function 🔒
• parse_grayscale 🔒
• parse_huerotate 🔒
• parse_invert 🔒
• parse_num_or_percentage 🔒
  Reads an optional number or percentage from the parser. Negative numbers are not allowed.
• parse_num_or_percentage_clamped 🔒
  Reads an optional number or percentage from the parser, returning a value clamped to [0, 1]. Negative numbers are not allowed.
• parse_opacity 🔒
• parse_saturate 🔒
• parse_sepia 🔒