1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ShareableBitmap.h"
28
29#include "NativeImageQt.h"
30#include <QImage>
31#include <QPainter>
32#include <QtGlobal>
33#include <WebCore/BitmapImage.h>
34#include <WebCore/GraphicsContext.h>
35
36using namespace WebCore;
37
38namespace WebKit {
39
40QImage ShareableBitmap::createQImage()
41{
42    ref(); // Balanced by deref in releaseSharedMemoryData
43    return QImage(reinterpret_cast<uchar*>(data()), m_size.width(), m_size.height(), m_size.width() * 4,
44                  m_flags & SupportsAlpha ? NativeImageQt::defaultFormatForAlphaEnabledImages() : NativeImageQt::defaultFormatForOpaqueImages(),
45                  releaseSharedMemoryData, this);
46}
47
48void ShareableBitmap::releaseSharedMemoryData(void* typelessBitmap)
49{
50    static_cast<ShareableBitmap*>(typelessBitmap)->deref(); // Balanced by ref in createQImage.
51}
52
53PassRefPtr<Image> ShareableBitmap::createImage()
54{
55    QPixmap* pixmap = new QPixmap(QPixmap::fromImage(createQImage()));
56    return BitmapImage::create(pixmap);
57}
58
59PassOwnPtr<GraphicsContext> ShareableBitmap::createGraphicsContext()
60{
61    // FIXME: Should this be OwnPtr<QImage>?
62    QImage* image = new QImage(createQImage());
63    QPainter* painter = new QPainter(image);
64    painter->setRenderHint(QPainter::SmoothPixmapTransform, true);
65    OwnPtr<GraphicsContext> context = adoptPtr(new GraphicsContext(painter));
66    context->takeOwnershipOfPlatformContext();
67    return context.release();
68}
69
70void ShareableBitmap::paint(GraphicsContext& context, const IntPoint& dstPoint, const IntRect& srcRect)
71{
72    QImage image = createQImage();
73    QPainter* painter = context.platformContext();
74    painter->drawImage(dstPoint, image, QRect(srcRect));
75}
76
77void ShareableBitmap::paint(GraphicsContext& context, float scaleFactor, const IntPoint& dstPoint, const IntRect& srcRect)
78{
79    if (qFuzzyCompare(scaleFactor, 1)) {
80        paint(context, dstPoint, srcRect);
81        return;
82    }
83
84    QImage image = createQImage();
85    QPainter* painter = context.platformContext();
86
87    painter->save();
88    painter->scale(scaleFactor, scaleFactor);
89    painter->drawImage(dstPoint, image, QRect(srcRect));
90    painter->restore();
91}
92
93}
94// namespace WebKit
95