1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2011 Brent Fulgham <bfulgham@webkit.org>
4 * Copyright (C) 2011 Igalia S.L.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
14 *
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.
26 */
27
28#include "config.h"
29#include "ShareableBitmap.h"
30
31#include <WebCore/BitmapImage.h>
32#include <WebCore/CairoUtilities.h>
33#include <WebCore/GraphicsContext.h>
34#include <WebCore/PlatformContextCairo.h>
35#include <WebCore/NotImplemented.h>
36
37using namespace WebCore;
38
39namespace WebKit {
40
41static const cairo_format_t cairoFormat = CAIRO_FORMAT_ARGB32;
42
43size_t ShareableBitmap::numBytesForSize(const WebCore::IntSize& size)
44{
45    return cairo_format_stride_for_width(cairoFormat, size.width()) * size.height();
46}
47
48static inline PassRefPtr<cairo_surface_t> createSurfaceFromData(void* data, const WebCore::IntSize& size)
49{
50    const int stride = cairo_format_stride_for_width(cairoFormat, size.width());
51    return adoptRef(cairo_image_surface_create_for_data(static_cast<unsigned char*>(data), cairoFormat, size.width(), size.height(), stride));
52}
53
54std::unique_ptr<GraphicsContext> ShareableBitmap::createGraphicsContext()
55{
56    RefPtr<cairo_surface_t> image = createCairoSurface();
57    RefPtr<cairo_t> bitmapContext = adoptRef(cairo_create(image.get()));
58    return std::make_unique<GraphicsContext>(bitmapContext.get());
59}
60
61void ShareableBitmap::paint(GraphicsContext& context, const IntPoint& dstPoint, const IntRect& srcRect)
62{
63    paint(context, 1, dstPoint, srcRect);
64}
65
66void ShareableBitmap::paint(GraphicsContext& context, float scaleFactor, const IntPoint& dstPoint, const IntRect& srcRect)
67{
68    RefPtr<cairo_surface_t> surface = createSurfaceFromData(data(), m_size);
69    FloatRect destRect(dstPoint, srcRect.size());
70    FloatRect srcRectScaled(srcRect);
71    srcRectScaled.scale(scaleFactor);
72    context.platformContext()->drawSurfaceToContext(surface.get(), destRect, srcRectScaled, &context);
73}
74
75PassRefPtr<cairo_surface_t> ShareableBitmap::createCairoSurface()
76{
77    RefPtr<cairo_surface_t> image = createSurfaceFromData(data(), m_size);
78
79    ref(); // Balanced by deref in releaseSurfaceData.
80    static cairo_user_data_key_t dataKey;
81    cairo_surface_set_user_data(image.get(), &dataKey, this, releaseSurfaceData);
82    return image.release();
83}
84
85void ShareableBitmap::releaseSurfaceData(void* typelessBitmap)
86{
87    static_cast<ShareableBitmap*>(typelessBitmap)->deref(); // Balanced by ref in createCairoSurface.
88}
89
90PassRefPtr<Image> ShareableBitmap::createImage()
91{
92    RefPtr<cairo_surface_t> surface = createCairoSurface();
93    if (!surface)
94        return 0;
95
96    return BitmapImage::create(surface.release());
97}
98
99} // namespace WebKit
100