1 /*
2  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
4  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB.  If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef RenderSVGResourceGradient_h
23 #define RenderSVGResourceGradient_h
24 
25 #if ENABLE(SVG)
26 #include "AffineTransform.h"
27 #include "FloatRect.h"
28 #include "Gradient.h"
29 #include "ImageBuffer.h"
30 #include "RenderSVGResourceContainer.h"
31 #include "SVGGradientElement.h"
32 
33 #include <wtf/HashMap.h>
34 
35 namespace WebCore {
36 
37 struct GradientData {
38     RefPtr<Gradient> gradient;
39     AffineTransform userspaceTransform;
40 };
41 
42 class GraphicsContext;
43 
44 class RenderSVGResourceGradient : public RenderSVGResourceContainer {
45 public:
46     RenderSVGResourceGradient(SVGGradientElement*);
47     virtual ~RenderSVGResourceGradient();
48 
49     virtual void removeAllClientsFromCache(bool markForInvalidation = true);
50     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
51 
52     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
53     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*);
resourceBoundingBox(RenderObject *)54     virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }
55 
56 protected:
57     void addStops(GradientData*, const Vector<Gradient::ColorStop>&) const;
58 
59     virtual bool boundingBoxMode() const = 0;
60     virtual void calculateGradientTransform(AffineTransform&) = 0;
61     virtual void collectGradientAttributes(SVGGradientElement*) = 0;
62     virtual void buildGradient(GradientData*, SVGGradientElement*) const = 0;
63 
64 private:
65     bool m_shouldCollectGradientAttributes : 1;
66     HashMap<RenderObject*, GradientData*> m_gradient;
67 
68 #if USE(CG)
69     GraphicsContext* m_savedContext;
70     OwnPtr<ImageBuffer> m_imageBuffer;
71 #endif
72 };
73 
74 }
75 
76 #endif
77 #endif
78