lighttroupe/luz

require 'cairo_context'

class CairoCanvas
    attr_reader :width, :height, :string_data, :context

    def initialize(width, height)
        @width, @height = width, height

        @string_data = ("\0" * (@width * @height * 4))        # TODO: ensure this is right for RUBY1.9, RUBY2.0 etc.
        @cairo_surface = Cairo::ImageSurface.new(@string_data, Cairo::FORMAT_ARGB32, @width, @height, stride = (@width * 4))

        @context = Cairo::Context.new(@cairo_surface)
        @context.paint
    end

    pipe :track_dirty_rects=, :context
    pipe :dirty_rects, :context
    pipe :dirty_rects_clear, :context
    pipe :entire_canvas_dirty?, :context
    pipe :entire_canvas_dirty=, :context

    def using
        yield @context
    end
end