1 /*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
4 * Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org>
5 * Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org>
6 * Copyright (C) 2009 Google, Inc.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24 #include "config.h"
25
26 #if ENABLE(SVG)
27 #include "SVGMarkerLayoutInfo.h"
28
29 #include "RenderSVGResourceMarker.h"
30
31 namespace WebCore {
32
SVGMarkerLayoutInfo()33 SVGMarkerLayoutInfo::SVGMarkerLayoutInfo()
34 : m_midMarker(0)
35 , m_elementIndex(0)
36 , m_strokeWidth(0)
37 {
38 }
39
~SVGMarkerLayoutInfo()40 SVGMarkerLayoutInfo::~SVGMarkerLayoutInfo()
41 {
42 }
43
processStartAndMidMarkers(void * infoPtr,const PathElement * element)44 static inline void processStartAndMidMarkers(void* infoPtr, const PathElement* element)
45 {
46 SVGMarkerLayoutInfo& info = *reinterpret_cast<SVGMarkerLayoutInfo*>(infoPtr);
47 SVGMarkerData& markerData = info.markerData();
48 int& elementIndex = info.elementIndex();
49
50 // First update the outslope for the previous element
51 markerData.updateOutslope(element->points[0]);
52
53 // Draw the marker for the previous element
54 RenderSVGResourceMarker* marker = markerData.marker();
55 if (elementIndex > 0 && marker)
56 info.addLayoutedMarker(marker, markerData.origin(), markerData.currentAngle());
57
58 // Update our marker data for this element
59 markerData.updateMarkerDataForPathElement(element);
60
61 // After drawing the start marker, switch to drawing mid markers
62 if (elementIndex == 1)
63 markerData.updateTypeAndMarker(SVGMarkerData::Mid, info.midMarker());
64
65 ++elementIndex;
66 }
67
calculateBoundaries(RenderSVGResourceMarker * startMarker,RenderSVGResourceMarker * midMarker,RenderSVGResourceMarker * endMarker,float strokeWidth,const Path & path)68 FloatRect SVGMarkerLayoutInfo::calculateBoundaries(RenderSVGResourceMarker* startMarker, RenderSVGResourceMarker* midMarker, RenderSVGResourceMarker* endMarker, float strokeWidth, const Path& path)
69 {
70 m_layout.clear();
71 m_midMarker = midMarker;
72 m_strokeWidth = strokeWidth;
73 m_elementIndex = 0;
74 m_markerData = SVGMarkerData(SVGMarkerData::Start, startMarker);
75 path.apply(this, processStartAndMidMarkers);
76
77 if (endMarker) {
78 m_markerData.updateTypeAndMarker(SVGMarkerData::End, endMarker);
79 addLayoutedMarker(endMarker, m_markerData.origin(), m_markerData.currentAngle());
80 }
81
82 if (m_layout.isEmpty())
83 return FloatRect();
84
85 Vector<MarkerLayout>::iterator it = m_layout.begin();
86 Vector<MarkerLayout>::iterator end = m_layout.end();
87
88 FloatRect bounds;
89 for (; it != end; ++it) {
90 MarkerLayout& layout = *it;
91
92 RenderSVGResourceMarker* markerContent = layout.marker;
93 ASSERT(markerContent);
94
95 bounds.unite(markerContent->markerBoundaries(layout.matrix));
96 }
97
98 return bounds;
99 }
100
clear()101 void SVGMarkerLayoutInfo::clear()
102 {
103 m_midMarker = 0;
104 m_elementIndex = 0;
105 m_strokeWidth = 0;
106 m_markerData.updateTypeAndMarker(SVGMarkerData::Unknown, 0);
107 m_layout.clear();
108 }
109
drawMarkers(PaintInfo & paintInfo)110 void SVGMarkerLayoutInfo::drawMarkers(PaintInfo& paintInfo)
111 {
112 if (m_layout.isEmpty())
113 return;
114
115 Vector<MarkerLayout>::iterator it = m_layout.begin();
116 Vector<MarkerLayout>::iterator end = m_layout.end();
117
118 for (; it != end; ++it) {
119 MarkerLayout& layout = *it;
120 layout.marker->draw(paintInfo, layout.matrix);
121 }
122 }
123
addLayoutedMarker(RenderSVGResourceMarker * marker,const FloatPoint & origin,float angle)124 void SVGMarkerLayoutInfo::addLayoutedMarker(RenderSVGResourceMarker* marker, const FloatPoint& origin, float angle)
125 {
126 ASSERT(marker);
127 m_layout.append(MarkerLayout(marker, marker->markerTransformation(origin, angle, m_strokeWidth)));
128 }
129
130 }
131
132 #endif // ENABLE(SVG)
133