Module: ZBar::JPEG
- Defined in:
- lib/zbar/jpeg.rb
Overview
zbar-0.10 has a problem handling certain JPEGs:
This is a problem in the underlying C library. It is fixed in zbar’s source control repository, but an updated package has not yet been released.
If this affects you, ask whoever compiled your libzbar to apply this patch: gist.github.com/willglynn/5659946
Class Method Summary collapse
-
.available? ⇒ Boolean
Is JPEG support available?.
-
.bugged? ⇒ Boolean
Is JPEG support bugged? See github.com/willglynn/ruby-zbar/issues/2 for details.
-
.warn_once_if_bugged ⇒ Object
:nodoc:.
Class Method Details
.available? ⇒ Boolean
Is JPEG support available?
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# File 'lib/zbar/jpeg.rb', line 13 def self.available? if @available.nil? @available = image_works?(WorkingBits) end @available end |
.bugged? ⇒ Boolean
Is JPEG support bugged? See github.com/willglynn/ruby-zbar/issues/2 for details.
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# File 'lib/zbar/jpeg.rb', line 23 def self.bugged? if @bugged.nil? @bugged = available? && !image_works?(BuggedBits) end @bugged end |
.warn_once_if_bugged ⇒ Object
:nodoc:
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# File 'lib/zbar/jpeg.rb', line 31 def self.warn_once_if_bugged #:nodoc: @warn_attempted ||= begin if bugged? STDERR.print "Your libzbar has a JPEG bug. Some images will fail to process correctly.\nSee: https://github.com/willglynn/ruby-zbar/blob/master/lib/zbar/jpeg.rb\n" end true end end |