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Contents
module ZPNG
class Pixels
include Enumerable
module ImageEnum
def each
@image.height.times do |y|
@image.width.times do |x|
yield @image[x,y]
end
end
end
def keep_if otherwise = Color::TRANSPARENT
@image.height.times do |y|
@image.width.times do |x|
@image[x,y] = otherwise unless yield(@image[x,y])
end
end
end
def filter!
@image.height.times do |y|
@image.width.times do |x|
@image[x,y] = yield(@image[x,y])
end
end
end
alias :map! :filter!
end
module ScanLineEnum
def each
@scanline.width.times do |x|
yield @scanline[x]
end
end
end
def initialize x
case x
when Image
@image = x
extend ImageEnum
when ScanLine
@scanline = x
extend ScanLineEnum
else raise ArgumentError, "don't know how to enumerate #{x.inspect}"
end
end
def == other
self.to_a == other.to_a
end
def uniq
self.to_a.uniq
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems