module Vectorize
  class Surface
    extend FFI::Library
    # TODO: How to make this portable?
    ffi_lib "/usr/X11/lib/libcairo.dylib"

    attach_function :cairo_create, [:pointer], :pointer

    CAIRO_FORMAT_INVALID   = -1
    CAIRO_FORMAT_ARGB32    = 0
    CAIRO_FORMAT_RGB24     = 1
    CAIRO_FORMAT_A8        = 2
    CAIRO_FORMAT_A1        = 3
    CAIRO_FORMAT_RGB16_565 = 4

    attr_reader :surface_pointer
    attr_reader :context_pointer

    def context
      @context_pointer ||= self.class.cairo_create(surface_pointer)
    end
  end
end