blend.rb

# ★ Additional Blend Types
# ★★★★★★★★★★★★★★★★★
#
# Author/s : cremno
# RGSS ver : 1 to 3

# old: 0 = normal, 1 = addition, 2 = subtract
# new: 3 = multiply, 4 = screen, 5 = lighten, 6 = darken
class Blend_Type
  def initialize(blend_type)
    @blend_type = blend_type.to_i
    @checked = false
  end
  def to_int
    if @checked
      @checked = false
      @blend_type
    else
      @checked = true
      @blend_type.between?(0, 6) ? 0 : @blend_type
    end
  end
end

[Plane, Sprite].each do |e|
  e.class_eval do
    alias cremno_blend_type= blend_type= unless $@
    def blend_type=(blend_type)
      self.cremno_blend_type = Blend_Type.new(blend_type)
    rescue => e
      raise e.class, e.message, e.backtrace[2..-1]
    end
  end
end