Class: Vips::ForeignPngFilter

Inherits:

Symbol

• Object
• Symbol
• Vips::ForeignPngFilter

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