1/*
2 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#include "config.h"
22
23#include "platform/graphics/filters/SourceGraphic.h"
24
25#include "platform/graphics/GraphicsContext.h"
26#include "platform/text/TextStream.h"
27#include "third_party/skia/include/effects/SkPictureImageFilter.h"
28#include "wtf/StdLibExtras.h"
29#include "wtf/text/WTFString.h"
30
31namespace blink {
32
33PassRefPtr<SourceGraphic> SourceGraphic::create(Filter* filter)
34{
35    return adoptRef(new SourceGraphic(filter));
36}
37
38const AtomicString& SourceGraphic::effectName()
39{
40    DEFINE_STATIC_LOCAL(const AtomicString, s_effectName, ("SourceGraphic", AtomicString::ConstructFromLiteral));
41    return s_effectName;
42}
43
44FloatRect SourceGraphic::determineAbsolutePaintRect(const FloatRect& requestedRect)
45{
46    FloatRect srcRect = filter()->sourceImageRect();
47    srcRect.intersect(requestedRect);
48    addAbsolutePaintRect(srcRect);
49    return srcRect;
50}
51
52void SourceGraphic::applySoftware()
53{
54    ImageBuffer* resultImage = createImageBufferResult();
55    Filter* filter = this->filter();
56    if (!resultImage || !filter->sourceImage())
57        return;
58
59    IntRect srcRect = filter->sourceImageRect();
60    if (ImageBuffer* sourceImageBuffer = filter->sourceImage()) {
61        resultImage->context()->drawImageBuffer(sourceImageBuffer,
62            FloatRect(IntPoint(srcRect.location() - absolutePaintRect().location()), sourceImageBuffer->size()));
63    }
64}
65
66void SourceGraphic::setDisplayList(PassRefPtr<DisplayList> displayList)
67{
68    m_displayList = displayList;
69}
70
71PassRefPtr<SkImageFilter> SourceGraphic::createImageFilter(SkiaImageFilterBuilder*)
72{
73    if (!m_displayList)
74        return nullptr;
75
76    return adoptRef(SkPictureImageFilter::Create(m_displayList->picture(), m_displayList->bounds()));
77}
78
79TextStream& SourceGraphic::externalRepresentation(TextStream& ts, int indent) const
80{
81    writeIndent(ts, indent);
82    ts << "[SourceGraphic]\n";
83    return ts;
84}
85
86} // namespace blink
87