Class: Vips::ForeignPngFilter

Inherits:
Symbol
  • Object
show all
Defined in:
lib/vips/foreign_png_filter.rb

Overview

The set of filters for PNG save. See http://www.w3.org/TR/PNG-Filters.html

  • :none no filtering
  • :sub difference to the left
  • :up difference up
  • :avg average of left and up
  • :paeth pick best neighbor predictor automatically
  • :all adaptive