/usr/share/ada/adainclude/gtkglada/gtk-glarea.adb is in libgtkglada2.24.4-dev 2.24.4dfsg-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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-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2001-2013, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library 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 --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public --
-- License along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
with Glib.Type_Conversion_Hooks;
pragma Elaborate_All (Glib.Type_Conversion_Hooks);
with Gtkada.Handlers;
with Gtk.Widget; use Gtk.Widget;
package body Gtk.GLArea is
package Type_Conversion is new Glib.Type_Conversion_Hooks.Hook_Registrator
(Get_Type'Access, Gtk_GLArea_Record);
pragma Warnings (Off, Type_Conversion);
-- This package is used to implement a minimal automated type conversion
-- without having to drag the whole Gtk.Type_Conversion package for the
-- most common widgets.
procedure On_Destroy (Widget : access Gtk_Widget_Record'Class);
----------------
-- On_Destroy --
----------------
procedure On_Destroy (Widget : access Gtk_Widget_Record'Class) is
begin
-- Temporarily remove widget from its parent, since otherwise we still
-- get openGL queries after the openGL context has been destroyed,
-- resulting in a Storage_Error
Ref (Widget);
Destroy (Widget);
end On_Destroy;
-------------
-- Gtk_New --
-------------
procedure Gtk_New (Widget : out Gtk_GLArea;
Attr_List : Attributes_Array) is
begin
Widget := new Gtk_GLArea_Record;
Initialize (Widget, Attr_List);
end Gtk_New;
----------------
-- Initialize --
----------------
procedure Initialize (Widget : access Gtk_GLArea_Record;
Attr_List : Attributes_Array)
is
function Internal (Attr_List : System.Address) return System.Address;
pragma Import (C, Internal, "gtk_gl_area_new");
Attributes : Attributes_Array (0 .. Attr_List'Length);
use type System.Address;
S : System.Address;
begin
Attributes (0 .. Attr_List'Length - 1) := Attr_List;
Attributes (Attributes'Last) := Gdk_GL_None;
S := Internal (Attributes (0)'Address);
if S = System.Null_Address then
raise Constraint_Error;
end if;
Set_Object (Widget, Internal (Attributes (0)'Address));
-- gtk+'s double buffering and openGL's don't go together
Set_Double_Buffered (Widget, False);
Gtkada.Handlers.Widget_Callback.Connect
(Widget, "destroy", Gtk.GLArea.On_Destroy'Access);
end Initialize;
-------------
-- Gtk_New --
-------------
procedure Gtk_New
(Widget : out Gtk_GLArea;
Attr_List : Attributes_Array;
Share : access Gtk_GLArea_Record'Class) is
begin
Widget := new Gtk_GLArea_Record;
Initialize (Widget, Attr_List, Share);
end Gtk_New;
----------------
-- Initialize --
----------------
procedure Initialize
(Widget : access Gtk_GLArea_Record;
Attr_List : Attributes_Array;
Share : access Gtk_GLArea_Record'Class)
is
function Internal (Attr_List : System.Address;
Share : System.Address)
return System.Address;
pragma Import (C, Internal, "gtk_gl_area_share_new");
Attributes : Attributes_Array (0 .. Attr_List'Length);
begin
Attributes (0 .. Attr_List'Length - 1) := Attr_List;
Attributes (Attributes'Last) := Gdk_GL_None;
Set_Object (Widget, Internal (Attributes (0)'Address,
Get_Object (Share)));
-- gtk+'s double buffering and openGL's don't go together
Set_Double_Buffered (Widget, False);
end Initialize;
------------------
-- Make_Current --
------------------
function Make_Current (Glarea : access Gtk_GLArea_Record'Class)
return Boolean
is
function Internal (GLArea : System.Address) return Gint;
pragma Import (C, Internal, "gtk_gl_area_make_current");
begin
return Boolean'Val (Internal (Get_Object (Glarea)));
end Make_Current;
------------------
-- Swap_Buffers --
------------------
procedure Swap_Buffers (Glarea : access Gtk_GLArea_Record'Class) is
procedure Internal (Glarea : System.Address);
pragma Import (C, Internal, "gtk_gl_area_swap_buffers");
begin
Internal (Get_Object (Glarea));
end Swap_Buffers;
end Gtk.GLArea;
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