module ChunkyPNG::Canvas::DataUrlImporting
Methods to import a canvas from a PNG data URL.
Public Instance Methods
Source
# File lib/chunky_png/canvas/data_url_importing.rb 12 def from_data_url(string) 13 if string =~ %r[^data:image/png;base64,((?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?)$] 14 from_blob($1.unpack("m").first) 15 else 16 raise SignatureMismatch, "The string was not a properly formatted data URL for a PNG image." 17 end 18 end
Imports a canvas from a PNG data URL. @param [String] string The data URL string to load from. @return [Canvas] The imported canvas. @raise ChunkyPNG::SignatureMismatch
if the provides string is not a properly
formatted PNG data URL (i.e. it should start with "data:image/png;base64,")