1 /*
2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
3 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
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 #if ENABLE(FILTERS)
24 #include "FETile.h"
25
26 #include "AffineTransform.h"
27 #include "Filter.h"
28 #include "GraphicsContext.h"
29 #include "Pattern.h"
30 #include "RenderTreeAsText.h"
31 #include "SVGImageBufferTools.h"
32 #include "TextStream.h"
33
34 namespace WebCore {
35
FETile(Filter * filter)36 FETile::FETile(Filter* filter)
37 : FilterEffect(filter)
38 {
39 }
40
create(Filter * filter)41 PassRefPtr<FETile> FETile::create(Filter* filter)
42 {
43 return adoptRef(new FETile(filter));
44 }
45
apply()46 void FETile::apply()
47 {
48 // FIXME: See bug 47315. This is a hack to work around a compile failure, but is incorrect behavior otherwise.
49 #if ENABLE(SVG)
50 if (hasResult())
51 return;
52 FilterEffect* in = inputEffect(0);
53 in->apply();
54 if (!in->hasResult())
55 return;
56
57 ImageBuffer* resultImage = createImageBufferResult();
58 if (!resultImage)
59 return;
60
61 setIsAlphaImage(in->isAlphaImage());
62
63 // Source input needs more attention. It has the size of the filterRegion but gives the
64 // size of the cutted sourceImage back. This is part of the specification and optimization.
65 FloatRect tileRect = in->maxEffectRect();
66 FloatPoint inMaxEffectLocation = tileRect.location();
67 FloatPoint maxEffectLocation = maxEffectRect().location();
68 if (in->filterEffectType() == FilterEffectTypeSourceInput) {
69 Filter* filter = this->filter();
70 tileRect = filter->filterRegion();
71 tileRect.scale(filter->filterResolution().width(), filter->filterResolution().height());
72 }
73
74 OwnPtr<ImageBuffer> tileImage;
75 if (!SVGImageBufferTools::createImageBuffer(tileRect, tileRect, tileImage, ColorSpaceDeviceRGB))
76 return;
77
78 GraphicsContext* tileImageContext = tileImage->context();
79 tileImageContext->translate(-inMaxEffectLocation.x(), -inMaxEffectLocation.y());
80 tileImageContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, in->absolutePaintRect().location());
81
82 RefPtr<Pattern> pattern = Pattern::create(tileImage->copyImage(), true, true);
83
84 AffineTransform patternTransform;
85 patternTransform.translate(inMaxEffectLocation.x() - maxEffectLocation.x(), inMaxEffectLocation.y() - maxEffectLocation.y());
86 pattern->setPatternSpaceTransform(patternTransform);
87 GraphicsContext* filterContext = resultImage->context();
88 filterContext->setFillPattern(pattern);
89 filterContext->fillRect(FloatRect(FloatPoint(), absolutePaintRect().size()));
90 #endif
91 }
92
dump()93 void FETile::dump()
94 {
95 }
96
externalRepresentation(TextStream & ts,int indent) const97 TextStream& FETile::externalRepresentation(TextStream& ts, int indent) const
98 {
99 writeIndent(ts, indent);
100 ts << "[feTile";
101 FilterEffect::externalRepresentation(ts);
102 ts << "]\n";
103 inputEffect(0)->externalRepresentation(ts, indent + 1);
104
105 return ts;
106 }
107
108 } // namespace WebCore
109
110 #endif // ENABLE(FILTERS)
111