1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : * vim: sw=4 ts=8 et :
3 : */
4 : /* ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at:
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is Mozilla Code.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * The Mozilla Foundation
21 : * Portions created by the Initial Developer are Copyright (C) 2010
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : * Chris Jones <jones.chris.g@gmail.com>
26 : *
27 : * Alternatively, the contents of this file may be used under the terms of
28 : * either the GNU General Public License Version 2 or later (the "GPL"), or
29 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 : * in which case the provisions of the GPL or the LGPL are applicable instead
31 : * of those above. If you wish to allow use of your version of this file only
32 : * under the terms of either the GPL or the LGPL, and not to allow others to
33 : * use your version of this file under the terms of the MPL, indicate your
34 : * decision by deleting the provisions above and replace them with the notice
35 : * and other provisions required by the GPL or the LGPL. If you do not delete
36 : * the provisions above, a recipient may use your version of this file under
37 : * the terms of any one of the MPL, the GPL or the LGPL.
38 : *
39 : * ***** END LICENSE BLOCK ***** */
40 :
41 : #ifndef dom_plugins_PluginBackgroundDestroyer
42 : #define dom_plugins_PluginBackgroundDestroyer
43 :
44 : #include "mozilla/plugins/PPluginBackgroundDestroyerChild.h"
45 : #include "mozilla/plugins/PPluginBackgroundDestroyerParent.h"
46 :
47 : #include "gfxASurface.h"
48 : #include "gfxSharedImageSurface.h"
49 :
50 : namespace mozilla {
51 : namespace plugins {
52 :
53 : /**
54 : * When instances of this class are destroyed, the old background goes
55 : * along with them, completing the destruction process (whether or not
56 : * the plugin stayed alive long enough to ack).
57 : */
58 : class PluginBackgroundDestroyerParent : public PPluginBackgroundDestroyerParent {
59 : public:
60 0 : PluginBackgroundDestroyerParent(gfxASurface* aDyingBackground)
61 0 : : mDyingBackground(aDyingBackground)
62 0 : { }
63 :
64 0 : virtual ~PluginBackgroundDestroyerParent() { }
65 :
66 : private:
67 : NS_OVERRIDE
68 0 : virtual void ActorDestroy(ActorDestroyReason why)
69 : {
70 0 : switch(why) {
71 : case Deletion:
72 : case AncestorDeletion:
73 0 : if (gfxSharedImageSurface::IsSharedImage(mDyingBackground)) {
74 : gfxSharedImageSurface* s =
75 0 : static_cast<gfxSharedImageSurface*>(mDyingBackground.get());
76 0 : DeallocShmem(s->GetShmem());
77 : }
78 0 : break;
79 : default:
80 : // We're shutting down or crashed, let automatic cleanup
81 : // take care of our shmem, if we have one.
82 0 : break;
83 : }
84 0 : }
85 :
86 : nsRefPtr<gfxASurface> mDyingBackground;
87 : };
88 :
89 : /**
90 : * This class exists solely to instruct its instance to release its
91 : * current background, a new one may be coming.
92 : */
93 : class PluginBackgroundDestroyerChild : public PPluginBackgroundDestroyerChild {
94 : public:
95 0 : PluginBackgroundDestroyerChild() { }
96 0 : virtual ~PluginBackgroundDestroyerChild() { }
97 :
98 : private:
99 : // Implementing this for good hygiene.
100 : NS_OVERRIDE
101 0 : virtual void ActorDestroy(ActorDestroyReason why)
102 0 : { }
103 : };
104 :
105 : } // namespace plugins
106 : } // namespace mozilla
107 :
108 : #endif // dom_plugins_PluginBackgroundDestroyer
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