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
22#if USE(TEXTURE_MAPPER)
23#include "TextureMapperBackingStore.h"
24
25#include "GraphicsLayer.h"
26#include "ImageBuffer.h"
27#include "TextureMapper.h"
28
29#if USE(GRAPHICS_SURFACE)
30#include "GraphicsSurface.h"
31#include "TextureMapperGL.h"
32#endif
33
34namespace WebCore {
35
36unsigned TextureMapperBackingStore::calculateExposedTileEdges(const FloatRect& totalRect, const FloatRect& tileRect)
37{
38    unsigned exposedEdges = TextureMapper::NoEdges;
39    if (!tileRect.x())
40        exposedEdges |= TextureMapper::LeftEdge;
41    if (!tileRect.y())
42        exposedEdges |= TextureMapper::TopEdge;
43    if (tileRect.width() + tileRect.x() >= totalRect.width())
44        exposedEdges |= TextureMapper::RightEdge;
45    if (tileRect.height() + tileRect.y() >= totalRect.height())
46        exposedEdges |= TextureMapper::BottomEdge;
47    return exposedEdges;
48}
49
50}
51#endif
52