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
35namespace WebCore {
36
37struct GradientData {
38    RefPtr<Gradient> gradient;
39    AffineTransform userspaceTransform;
40};
41
42class GraphicsContext;
43
44class RenderSVGResourceGradient : public RenderSVGResourceContainer {
45public:
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*);
54    virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }
55
56protected:
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
64private:
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