1/*
2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this library; see the file COPYING.LIB. If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21#include "TextureMapperBackingStore.h"
22
23#include "FloatRect.h"
24
25namespace WebCore {
26
27unsigned TextureMapperBackingStore::calculateExposedTileEdges(const FloatRect& totalRect, const FloatRect& tileRect)
28{
29 unsigned exposedEdges = TextureMapper::NoEdges;
30 if (!tileRect.x())
31 exposedEdges |= TextureMapper::LeftEdge;
32 if (!tileRect.y())
33 exposedEdges |= TextureMapper::TopEdge;
34 if (tileRect.width() + tileRect.x() >= totalRect.width())
35 exposedEdges |= TextureMapper::RightEdge;
36 if (tileRect.height() + tileRect.y() >= totalRect.height())
37 exposedEdges |= TextureMapper::BottomEdge;
38 return exposedEdges;
39}
40
41} // namespace WebCore
42