/usr/lib/ocaml/lablgtk2/rsvg.ml is in liblablgtk2-gnome-ocaml-dev 2.16.0+dfsg-1.
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 *)
(* *)
(* *)
(**************************************************************************)
(* $Id$ *)
type size_fun = int -> int -> int * int
let round f =
int_of_float (if f < 0. then f -. 0.5 else f +. 0.5)
let at_size rw rh w h =
(if rw < 0 then w else rw), (if rh < 0 then h else rh)
let at_zoom zx zy w h =
if w < 0 || h < 0
then (w, h)
else
(round (float w *. zx)), (round (float h *. zy))
let at_max_size mw mh w h =
if w < 0 || h < 0
then (w, h)
else
let zx = float mw /. float w in
let zy = float mh /. float h in
let z = min zx zy in
(round (float w *. z)), (round (float h *. z))
let at_zoom_with_max zx zy mw mh w h =
if w < 0 || h < 0
then (w, h)
else
let rw = round (float w *. zx) in
let rh = round (float h *. zy) in
if rw > mw || rh > mh
then
let zx = float mw /. float w in
let zy = float mh /. float h in
let z = min zx zy in
(round (float w *. z)), (round (float h *. z))
else
(rw, rh)
type error = FAILED
exception Error of error * string
external _init : unit -> unit = "ml_rsvg_init"
let _ =
Callback.register_exception "ml_rsvg_exn" (Error (FAILED, "")) ;
_init ()
type t
external new_handle : unit -> t
= "ml_rsvg_handle_new"
external new_handle_gz : unit -> t
= "ml_rsvg_handle_new_gz"
external set_size_callback : t -> size_fun -> unit
= "ml_rsvg_handle_set_size_callback"
external free_handle : t -> unit
= "ml_rsvg_handle_free"
external close : t -> unit = "ml_rsvg_handle_close"
external write : t -> string -> off:int -> len:int -> unit = "ml_rsvg_handle_write"
external get_pixbuf : t -> GdkPixbuf.pixbuf = "ml_rsvg_handle_get_pixbuf"
external set_dpi : t -> float -> unit = "ml_rsvg_handle_set_dpi"
external set_default_dpi : float -> unit = "ml_rsvg_set_default_dpi"
type input =
| Rsvg_SubString of string * int * int
| Rsvg_Buffer of int * (string -> int)
let render ?(gz=false) ?dpi ?size_cb input =
let h = if gz then new_handle_gz () else new_handle () in
Gaux.may (set_size_callback h) size_cb ;
Gaux.may (set_dpi h) dpi ;
try
begin match input with
| Rsvg_SubString (s, off, len) ->
write h s ~off ~len
| Rsvg_Buffer (len, fill) ->
let buff = String.create len in
let c = ref (fill buff) in
while !c > 0 do
write h buff 0 !c ;
c := fill buff
done
end ;
close h ;
let pb = get_pixbuf h in
free_handle h ;
pb
with exn ->
free_handle h ; raise exn
let render_from_string ?gz ?dpi ?size_cb ?pos ?len s =
let off = Gaux.default 0 ~opt:pos in
let len = Gaux.default (String.length s - off) ~opt:len in
render ?gz ?dpi ?size_cb
(Rsvg_SubString (s, off, len))
let render_from_file ?(gz=false) ?dpi ?size_cb fname =
let ic = if gz then open_in_bin fname else open_in fname in
let pb =
try
render ~gz ?dpi ?size_cb
(Rsvg_Buffer (4096, (fun b -> input ic b 0 (String.length b))))
with exn ->
close_in ic ; raise exn in
close_in ic ;
pb
|