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Versions: 5
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Contents
require "rabbit/gtk"
require "rabbit/rabbit"
module Rabbit
module Renderer
Color = Struct.new(:red, :green, :blue, :alpha, :have_alpha)
class Color
GDK_COLOR_NORMALIZE = 65535.0
class << self
def new_from_gdk_color(color, have_alpha=false)
red = color.red / GDK_COLOR_NORMALIZE
green = color.green / GDK_COLOR_NORMALIZE
blue = color.blue / GDK_COLOR_NORMALIZE
alpha = 1.0
new(red, green, blue, alpha, have_alpha)
end
HEX = "(?i:[a-z0-9])"
def parse(spec)
case spec
when Array
new(*spec)
when /\A\#(#{HEX})(#{HEX})(#{HEX})(#{HEX})?\z/
new(*normalize($1, $2, $3, $4, 16 ** 1 - 1))
when /\A\#(#{HEX}{2})(#{HEX}{2})(#{HEX}{2})(#{HEX}{2})?\z/
new(*normalize($1, $2, $3, $4, 16 ** 2 - 1))
when /\A\#(#{HEX}{4})(#{HEX}{4})(#{HEX}{4})(#{HEX}{4})?\z/
new(*normalize($1, $2, $3, $4, 16 ** 4 - 1))
else
new_from_gdk_color(Gdk::Color.parse(spec))
end
end
def normalize(r, g, b, a, max)
red = r.hex / max.to_f
green = g.hex / max.to_f
blue = b.hex / max.to_f
have_alpha = !a.nil?
alpha = have_alpha ? a.hex / max.to_f : 1.0
[red, green, blue, alpha, have_alpha]
end
end
alias have_alpha? have_alpha
def to_s
"#%04X%04X%04X%04X" % to_gdk_rgba
end
def to_a
if have_alpha?
[red, green, blue, alpha]
else
[red, green, blue]
end
end
def to_gdk_rgb
to_gdk_rgba[0..-2]
end
def to_gdk_rgba
[red, green, blue, alpha || 1.0].collect do |color|
(color * GDK_COLOR_NORMALIZE).truncate
end
end
def to_gdk_format
to_s.gsub(/[a-z0-9]{4}\z/i, '')
end
def to_gdk_color
Gdk::Color.new(*to_gdk_rgb)
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems