2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
4 * Copyright (C) 2011 Andreas Kling <kling@webkit.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
29 #include "BackingStore.h"
31 #include "UpdateInfo.h"
32 #include "ShareableBitmap.h"
33 #include <WebCore/GraphicsContext.h>
34 #include <WebCore/IntRect.h>
36 using namespace WebCore;
40 void BackingStore::paint(QPainter* painter, const IntRect& rect)
42 ASSERT(!m_pixmap.isNull());
43 painter->drawPixmap(rect, m_pixmap, rect);
46 void BackingStore::incorporateUpdate(ShareableBitmap* bitmap, const UpdateInfo& updateInfo)
48 if (m_pixmap.isNull())
49 m_pixmap = QPixmap(m_size);
51 scroll(updateInfo.scrollRect, updateInfo.scrollOffset);
53 IntPoint updateRectLocation = updateInfo.updateRectBounds.location();
55 QPainter painter(&m_pixmap);
56 GraphicsContext graphicsContext(&painter);
58 // Paint all update rects.
59 for (size_t i = 0; i < updateInfo.updateRects.size(); ++i) {
60 IntRect updateRect = updateInfo.updateRects[i];
61 IntRect srcRect = updateRect;
62 srcRect.move(-updateRectLocation.x(), -updateRectLocation.y());
63 bitmap->paint(graphicsContext, updateRect.location(), srcRect);
67 void BackingStore::scroll(const IntRect& scrollRect, const IntSize& scrollOffset)
69 if (scrollOffset.isZero())
72 m_pixmap.scroll(scrollOffset.width(), scrollOffset.height(), scrollRect);