% Copyright    Barbara Liskov    1985, 1986

x_bitmap = cluster is none, create, screate, destroy, c2b, get_id,
		      equal, similar, copy

rep = int

none = proc () returns (cvt)
    return(0)
    end none

create = proc (width, height: int, bits: _wordvec) returns (cvt)
	   signals (error(string))
    x_buf$setup(x_storebitmap, 0, 0, 0)
    x_buf$set_s01(height, width)
    x_buf$send_data(w2b(bits), 1, ((width + 15) / 16) * height * 2)
    x_buf$receive()
       resignal error
    return(x_buf$get_lp0())
    end create

screate = proc (width, height: int, bits: string) returns (x_bitmap)
	    signals (error(string))
    bts: _bytevec := _bytevec$create(string$size(bits))
    for i: int in int$from_to_by(1, string$size(bits), 2) do
	bts[i] := bits[i + 1]
	bts[i + 1] := bits[i]
	end
    return(create(width, height, b2w(bts)))
       resignal error
    end screate

destroy = proc (bit: cvt)
    x_buf$setup(x_freebitmap, 0, 0, 0)
    x_buf$set_l0(bit)
    end destroy

c2b = proc (font: x_font, c: char) returns (cvt) signals (error(string))
    x_buf$setup(x_charbitmap, 0, 0, 0)
    x_buf$set_l0s23(f2i(font), char$c2i(c), 0)
    x_buf$receive()
       resignal error
    return(x_buf$get_lp0())
    end c2b

get_id = proc (bit: cvt) returns (int)
    return(bit)
    end get_id

equal = proc (bit1, bit2: cvt) returns (bool)
    return(bit1 = bit2)
    end equal

similar = proc (bit1, bit2: cvt) returns (bool)
    return(bit1 = bit2)
    end similar

copy = proc (bit: cvt) returns (cvt)
    return(bit)
    end copy

end x_bitmap