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/CairoOperations.h>
33#include <WebCore/CairoUtilities.h>
34#include <WebCore/GraphicsContextImplCairo.h>
35#include <WebCore/PlatformContextCairo.h>
36#include <WebCore/NotImplemented.h>
37
38namespace WebKit {
39using namespace WebCore;
40
41static const cairo_format_t cairoFormat = CAIRO_FORMAT_ARGB32;
42
43Checked<unsigned, RecordOverflow> ShareableBitmap::calculateBytesPerRow(WebCore::IntSize size, const Configuration&)
44{
45 return cairo_format_stride_for_width(cairoFormat, size.width());
46}
47
48unsigned ShareableBitmap::calculateBytesPerPixel(const Configuration&)
49{
50 return 4;
51}
52
53static inline RefPtr<cairo_surface_t> createSurfaceFromData(void* data, const WebCore::IntSize& size)
54{
55 const int stride = cairo_format_stride_for_width(cairoFormat, size.width());
56 return adoptRef(cairo_image_surface_create_for_data(static_cast<unsigned char*>(data), cairoFormat, size.width(), size.height(), stride));
57}
58
59std::unique_ptr<GraphicsContext> ShareableBitmap::createGraphicsContext()
60{
61 RefPtr<cairo_surface_t> image = createCairoSurface();
62 RefPtr<cairo_t> bitmapContext = adoptRef(cairo_create(image.get()));
63 return std::make_unique<GraphicsContext>(GraphicsContextImplCairo::createFactory(bitmapContext.get()));
64}
65
66void ShareableBitmap::paint(GraphicsContext& context, const IntPoint& dstPoint, const IntRect& srcRect)
67{
68 paint(context, 1, dstPoint, srcRect);
69}
70
71void ShareableBitmap::paint(GraphicsContext& context, float scaleFactor, const IntPoint& dstPoint, const IntRect& srcRect)
72{
73 RefPtr<cairo_surface_t> surface = createSurfaceFromData(data(), m_size);
74 FloatRect destRect(dstPoint, srcRect.size());
75 FloatRect srcRectScaled(srcRect);
76 srcRectScaled.scale(scaleFactor);
77
78 ASSERT(context.hasPlatformContext());
79 auto& state = context.state();
80 Cairo::drawSurface(*context.platformContext(), surface.get(), destRect, srcRectScaled, state.imageInterpolationQuality, state.alpha, Cairo::ShadowState(state));
81}
82
83RefPtr<cairo_surface_t> ShareableBitmap::createCairoSurface()
84{
85 RefPtr<cairo_surface_t> image = createSurfaceFromData(data(), m_size);
86
87 ref(); // Balanced by deref in releaseSurfaceData.
88 static cairo_user_data_key_t dataKey;
89 cairo_surface_set_user_data(image.get(), &dataKey, this, releaseSurfaceData);
90 return image;
91}
92
93void ShareableBitmap::releaseSurfaceData(void* typelessBitmap)
94{
95 static_cast<ShareableBitmap*>(typelessBitmap)->deref(); // Balanced by ref in createCairoSurface.
96}
97
98RefPtr<Image> ShareableBitmap::createImage()
99{
100 RefPtr<cairo_surface_t> surface = createCairoSurface();
101 if (!surface)
102 return nullptr;
103
104 return BitmapImage::create(WTFMove(surface));
105}
106
107} // namespace WebKit
108