2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
3 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4 * Copyright (C) 2012 Samsung Electronics. All rights reserved.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
22 #ifndef CompositingTriggers_h
23 #define CompositingTriggers_h
27 enum CompositingTrigger {
28 VideoTrigger = 1 << 1,
29 CanvasTrigger = 1 << 3,
30 FilterTrigger = 1 << 5,
31 ScrollableInnerFrameTrigger = 1 << 6,
33 // FIXME: This is a temporary trigger for enabling the old, opt-in path for
34 // accelerated overflow scroll. It should be removed once the "universal"
35 // path is ready (crbug.com/254111).
36 // Currently there is no way to enable this trigger, which means we can
37 // remove it once we're confident in the current codepaths.
38 LegacyOverflowScrollTrigger = 1 << 7,
40 OverflowScrollTrigger = 1 << 8,
41 ViewportConstrainedPositionedTrigger = 1 << 9,
42 AllCompositingTriggers = 0xFFFFFFFF,
45 typedef unsigned CompositingTriggerFlags;