/usr/lib/ocaml/lablgtk2/glGtk.ml is in liblablgtk2-gl-ocaml-dev 2.18.5+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(* Lablgtk *)
(* *)
(* This program is free software; you can redistribute it *)
(* and/or modify it under the terms of the GNU Library General *)
(* Public License as published by the Free Software Foundation *)
(* version 2, with the exception described in file COPYING which *)
(* comes with the library. *)
(* *)
(* This program is distributed in the hope that it will be useful, *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
(* GNU Library General Public License for more details. *)
(* *)
(* You should have received a copy of the GNU Library General *)
(* Public License along with this program; if not, write to the *)
(* Free Software Foundation, Inc., 59 Temple Place, Suite 330, *)
(* Boston, MA 02111-1307 USA *)
(* *)
(* *)
(**************************************************************************)
(* $Id$ *)
open Gaux
open Gtk
type visual_options = [
| `USE_GL
| `BUFFER_SIZE of int
| `LEVEL of int
| `RGBA
| `DOUBLEBUFFER
| `STEREO
| `AUX_BUFFERS of int
| `RED_SIZE of int
| `GREEN_SIZE of int
| `BLUE_SIZE of int
| `ALPHA_SIZE of int
| `DEPTH_SIZE of int
| `STENCIL_SIZE of int
| `ACCUM_GREEN_SIZE of int
| `ACCUM_ALPHA_SIZE of int
]
type gl_area = [Gtk.drawing_area|`glarea]
module GtkRaw = struct
external create :
visual_options list -> share:[>`glarea] optobj -> gl_area obj
= "ml_gtk_gl_area_new"
external swap_buffers : [>`glarea] obj -> unit
= "ml_gtk_gl_area_swap_buffers"
external make_current : [>`glarea] obj -> bool
= "ml_gtk_gl_area_make_current"
end
class area_signals obj =
object (connect)
inherit GObj.widget_signals_impl (obj : [> gl_area] obj)
method display ~callback =
(new GObj.event_signals obj)#after#expose ~callback:
begin fun ev ->
if GdkEvent.Expose.count ev = 0 then
if GtkRaw.make_current obj then callback ()
else prerr_endline "GlGtk-WARNING **: could not make current";
true
end
method reshape ~callback =
(new GObj.event_signals obj)#after#configure ~callback:
begin fun ev ->
if GtkRaw.make_current obj then begin
callback ~width:(GdkEvent.Configure.width ev)
~height:(GdkEvent.Configure.height ev)
end
else prerr_endline "GlGtk-WARNING **: could not make current";
true
end
method realize ~callback =
(new GObj.misc_signals (obj :> Gtk.widget obj))#after#realize ~callback:
begin fun ev ->
if GtkRaw.make_current obj then callback ()
else prerr_endline "GlGtk-WARNING **: could not make current"
end
end
class area obj = object (self)
inherit GObj.widget (obj : gl_area obj)
method as_area = obj
method event = new GObj.event_ops obj
method connect = new area_signals obj
method set_size = GtkMisc.DrawingArea.size obj
method swap_buffers () = GtkRaw.swap_buffers obj
method make_current () =
if not (GtkRaw.make_current obj) then
raise (Gl.GLerror "make_current")
end
let area options ?share ?(width=0) ?(height=0) ?packing ?show () =
let share =
match share with Some (x : area) -> Some x#as_area | None -> None in
let w = GtkRaw.create options ~share:(Gpointer.optboxed share) in
if width <> 0 || height <> 0 then GtkMisc.DrawingArea.size w ~width ~height;
GtkBase.Widget.add_events w [`EXPOSURE];
GObj.pack_return (new area w) ~packing ~show
let region_of_raw raw =
Gpointer.unsafe_create_region ~path:[|1|] ~get_length:Raw.byte_size raw
|