lighttroupe/luz-next

require 'user_object_setting'

class UserObjectSettingImage < UserObjectSetting
    attr_reader :image_name, :width, :height

    def to_yaml_properties
        super + ['@image_name']
    end

    def after_load
        @width ||= 0
        @height ||= 0
        super
    end

    def image_name=(name)
        clear
        @image_name = name
    end

    #
    # using the image (as opengl texture)
    #
    def using
        using_index(0) {
            yield
        }
    end

    def using_index(index)
        load_images if @image_list.nil?
        return yield unless @image_list
        @image_list[index % @image_list.size].using {
            # TODO: add texture options
            yield
        }
    end

    def using_progress(progress)
        load_images if @image_list.nil?
        return yield unless @image_list
        index = @image_list.size.choose_index_by_fuzzy(progress)
        using_index(index) {
            yield
        }
    end

    def one
        load_images if @image_list.nil?
        return unless @image_list
        @image_list[0]        # for now
    end

    def color_at(x,y)
        @default_color ||= Color.new
        load_images if @image_list.nil?
        return @default_color unless @image_list
        @image_list[0].color_at(x, y)        # we only support color picking from the first
    end

    def summary
        summary_format(@image_name) if @image_name
    end

private

    def clear
        set(:image_name, nil)
        @image_list = nil
        @width = 0
        @height = 0
    end

    def load_images
        # NOTE: assumes @image_list is nil
        if @image_name
            @image_list = $engine.load_images(@image_name)

            if @image_list
                @width = @image_list[0].width
                @height = @image_list[0].height
            end
        end
        @image_list
    end
end