1 /*
2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3 * 2009 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 "SVGResourceMasker.h"
31
32 #include "CanvasPixelArray.h"
33 #include "Image.h"
34 #include "ImageBuffer.h"
35 #include "ImageData.h"
36 #include "GraphicsContext.h"
37 #include "RenderObject.h"
38 #include "SVGMaskElement.h"
39 #include "SVGRenderSupport.h"
40 #include "SVGRenderStyle.h"
41 #include "TextStream.h"
42
43 using namespace std;
44
45 namespace WebCore {
46
SVGResourceMasker(const SVGMaskElement * ownerElement)47 SVGResourceMasker::SVGResourceMasker(const SVGMaskElement* ownerElement)
48 : SVGResource()
49 , m_ownerElement(ownerElement)
50 , m_emptyMask(false)
51 {
52 }
53
~SVGResourceMasker()54 SVGResourceMasker::~SVGResourceMasker()
55 {
56 }
57
invalidate()58 void SVGResourceMasker::invalidate()
59 {
60 SVGResource::invalidate();
61 m_mask.clear();
62 m_emptyMask = false;
63 }
64
maskerBoundingBox(const FloatRect & objectBoundingBox) const65 FloatRect SVGResourceMasker::maskerBoundingBox(const FloatRect& objectBoundingBox) const
66 {
67 return m_ownerElement->maskBoundingBox(objectBoundingBox);
68 }
69
applyMask(GraphicsContext * context,const RenderObject * object)70 bool SVGResourceMasker::applyMask(GraphicsContext* context, const RenderObject* object)
71 {
72 if (!m_mask && !m_emptyMask)
73 m_mask = m_ownerElement->drawMaskerContent(object, m_maskRect, m_emptyMask);
74
75 if (!m_mask)
76 return false;
77
78 context->clipToImageBuffer(m_maskRect, m_mask.get());
79 return true;
80 }
81
externalRepresentation(TextStream & ts) const82 TextStream& SVGResourceMasker::externalRepresentation(TextStream& ts) const
83 {
84 ts << "[type=MASKER]";
85 return ts;
86 }
87
getMaskerById(Document * document,const AtomicString & id,const RenderObject * object)88 SVGResourceMasker* getMaskerById(Document* document, const AtomicString& id, const RenderObject* object)
89 {
90 SVGResource* resource = getResourceById(document, id, object);
91 if (resource && resource->isMasker())
92 return static_cast<SVGResourceMasker*>(resource);
93
94 return 0;
95 }
96
97 } // namespace WebCore
98
99 #endif
100