1 /*
2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3 * 2008 Dirk Schulze <krit@webkit.org>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28
29 #if ENABLE(SVG)
30 #include "SVGPaintServerPattern.h"
31
32 #include "GraphicsContext.h"
33 #include "Image.h"
34 #include "ImageBuffer.h"
35 #include "Pattern.h"
36 #include "RenderObject.h"
37 #include "SVGPatternElement.h"
38 #include "SVGRenderTreeAsText.h"
39 #include "TransformationMatrix.h"
40
41 using namespace std;
42
43 namespace WebCore {
44
SVGPaintServerPattern(const SVGPatternElement * owner)45 SVGPaintServerPattern::SVGPaintServerPattern(const SVGPatternElement* owner)
46 : m_ownerElement(owner)
47 , m_pattern(0)
48 {
49 ASSERT(owner);
50 }
51
~SVGPaintServerPattern()52 SVGPaintServerPattern::~SVGPaintServerPattern()
53 {
54 }
55
patternBoundaries() const56 FloatRect SVGPaintServerPattern::patternBoundaries() const
57 {
58 return m_patternBoundaries;
59 }
60
setPatternBoundaries(const FloatRect & rect)61 void SVGPaintServerPattern::setPatternBoundaries(const FloatRect& rect)
62 {
63 m_patternBoundaries = rect;
64 }
65
tile() const66 ImageBuffer* SVGPaintServerPattern::tile() const
67 {
68 return m_tile.get();
69 }
70
setTile(PassOwnPtr<ImageBuffer> tile)71 void SVGPaintServerPattern::setTile(PassOwnPtr<ImageBuffer> tile)
72 {
73 m_tile = tile;
74 }
75
patternTransform() const76 TransformationMatrix SVGPaintServerPattern::patternTransform() const
77 {
78 return m_patternTransform;
79 }
80
setPatternTransform(const TransformationMatrix & transform)81 void SVGPaintServerPattern::setPatternTransform(const TransformationMatrix& transform)
82 {
83 m_patternTransform = transform;
84 }
85
externalRepresentation(TextStream & ts) const86 TextStream& SVGPaintServerPattern::externalRepresentation(TextStream& ts) const
87 {
88 // Gradients/patterns aren't setup, until they are used for painting. Work around that fact.
89 m_ownerElement->buildPattern(FloatRect(0.0f, 0.0f, 1.0f, 1.0f));
90
91 ts << "[type=PATTERN]"
92 << " [bbox=" << patternBoundaries() << "]";
93 if (!patternTransform().isIdentity())
94 ts << " [pattern transform=" << patternTransform() << "]";
95 return ts;
96 }
97
setup(GraphicsContext * & context,const RenderObject * object,SVGPaintTargetType type,bool isPaintingText) const98 bool SVGPaintServerPattern::setup(GraphicsContext*& context, const RenderObject* object, SVGPaintTargetType type, bool isPaintingText) const
99 {
100 FloatRect targetRect = object->objectBoundingBox();
101
102 const SVGRenderStyle* style = object->style()->svgStyle();
103 bool isFilled = (type & ApplyToFillTargetType) && style->hasFill();
104 bool isStroked = (type & ApplyToStrokeTargetType) && style->hasStroke();
105
106 ASSERT(isFilled && !isStroked || !isFilled && isStroked);
107
108 m_ownerElement->buildPattern(targetRect);
109 if (!tile())
110 return false;
111
112 context->save();
113
114 ASSERT(!m_pattern);
115
116 IntRect tileRect = tile()->image()->rect();
117 if (tileRect.width() > patternBoundaries().width() || tileRect.height() > patternBoundaries().height()) {
118 // Draw the first cell of the pattern manually to support overflow="visible" on all platforms.
119 int tileWidth = static_cast<int>(patternBoundaries().width() + 0.5f);
120 int tileHeight = static_cast<int>(patternBoundaries().height() + 0.5f);
121 OwnPtr<ImageBuffer> tileImage = ImageBuffer::create(IntSize(tileWidth, tileHeight));
122
123 GraphicsContext* tileImageContext = tileImage->context();
124
125 int numY = static_cast<int>(ceilf(tileRect.height() / tileHeight)) + 1;
126 int numX = static_cast<int>(ceilf(tileRect.width() / tileWidth)) + 1;
127
128 tileImageContext->save();
129 tileImageContext->translate(-patternBoundaries().width() * numX, -patternBoundaries().height() * numY);
130 for (int i = numY; i > 0; i--) {
131 tileImageContext->translate(0, patternBoundaries().height());
132 for (int j = numX; j > 0; j--) {
133 tileImageContext->translate(patternBoundaries().width(), 0);
134 tileImageContext->drawImage(tile()->image(), tileRect, tileRect);
135 }
136 tileImageContext->translate(-patternBoundaries().width() * numX, 0);
137 }
138 tileImageContext->restore();
139
140 m_pattern = Pattern::create(tileImage->image(), true, true);
141 }
142 else
143 m_pattern = Pattern::create(tile()->image(), true, true);
144
145 if (isFilled) {
146 context->setAlpha(style->fillOpacity());
147 context->setFillPattern(m_pattern);
148 context->setFillRule(style->fillRule());
149 }
150 if (isStroked) {
151 context->setAlpha(style->strokeOpacity());
152 context->setStrokePattern(m_pattern);
153 applyStrokeStyleToContext(context, object->style(), object);
154 }
155
156 TransformationMatrix matrix;
157 matrix.translate(patternBoundaries().x(), patternBoundaries().y());
158 matrix.multiply(patternTransform());
159 m_pattern->setPatternSpaceTransform(matrix);
160
161 if (isPaintingText) {
162 context->setTextDrawingMode(isFilled ? cTextFill : cTextStroke);
163 #if PLATFORM(CG)
164 if (isFilled)
165 context->applyFillPattern();
166 else
167 context->applyStrokePattern();
168 #endif
169 }
170
171 return true;
172 }
173
teardown(GraphicsContext * & context,const RenderObject *,SVGPaintTargetType,bool) const174 void SVGPaintServerPattern::teardown(GraphicsContext*& context, const RenderObject*, SVGPaintTargetType, bool) const
175 {
176 m_pattern = 0;
177
178 context->restore();
179 }
180
181 } // namespace WebCore
182
183 #endif
184